From: Jani Nikula <jani.nikula@xxxxxxxxx> [ Upstream commit 6cc42fbeb150ff33b17cbf108713ca4be23994d8 ] In a long overdue refactoring, split out backlight code to new intel_backlight.[ch]. Simple code movement, leave renames for follow-up work. No functional changes. Cc: Lyude Paul <lyude@xxxxxxxxxx> Reviewed-by: Lyude Paul <lyude@xxxxxxxxxx> Signed-off-by: Jani Nikula <jani.nikula@xxxxxxxxx> Link: https://patchwork.freedesktop.org/patch/msgid/97d310848f03061473b9b2328e2c5c4dcf263cfa.1629888677.git.jani.nikula@xxxxxxxxx Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- drivers/gpu/drm/i915/Makefile | 1 + drivers/gpu/drm/i915/display/g4x_dp.c | 2 +- drivers/gpu/drm/i915/display/icl_dsi.c | 1 + .../gpu/drm/i915/display/intel_backlight.c | 1778 +++++++++++++++++ .../gpu/drm/i915/display/intel_backlight.h | 51 + .../gpu/drm/i915/display/intel_connector.c | 4 +- drivers/gpu/drm/i915/display/intel_ddi.c | 2 +- drivers/gpu/drm/i915/display/intel_dp.c | 1 + .../drm/i915/display/intel_dp_aux_backlight.c | 2 +- drivers/gpu/drm/i915/display/intel_lvds.c | 1 + drivers/gpu/drm/i915/display/intel_opregion.c | 3 +- drivers/gpu/drm/i915/display/intel_panel.c | 1767 +--------------- drivers/gpu/drm/i915/display/intel_panel.h | 34 +- drivers/gpu/drm/i915/display/vlv_dsi.c | 1 + 14 files changed, 1843 insertions(+), 1805 deletions(-) create mode 100644 drivers/gpu/drm/i915/display/intel_backlight.c create mode 100644 drivers/gpu/drm/i915/display/intel_backlight.h diff --git a/drivers/gpu/drm/i915/Makefile b/drivers/gpu/drm/i915/Makefile index 26cf754229451..9d371be7dc5cd 100644 --- a/drivers/gpu/drm/i915/Makefile +++ b/drivers/gpu/drm/i915/Makefile @@ -249,6 +249,7 @@ i915-y += \ display/g4x_dp.o \ display/g4x_hdmi.o \ display/icl_dsi.o \ + display/intel_backlight.o \ display/intel_crt.o \ display/intel_ddi.o \ display/intel_ddi_buf_trans.o \ diff --git a/drivers/gpu/drm/i915/display/g4x_dp.c b/drivers/gpu/drm/i915/display/g4x_dp.c index de0f358184aa3..29c0eca647e34 100644 --- a/drivers/gpu/drm/i915/display/g4x_dp.c +++ b/drivers/gpu/drm/i915/display/g4x_dp.c @@ -7,6 +7,7 @@ #include "g4x_dp.h" #include "intel_audio.h" +#include "intel_backlight.h" #include "intel_connector.h" #include "intel_de.h" #include "intel_display_types.h" @@ -16,7 +17,6 @@ #include "intel_fifo_underrun.h" #include "intel_hdmi.h" #include "intel_hotplug.h" -#include "intel_panel.h" #include "intel_pps.h" #include "intel_sideband.h" diff --git a/drivers/gpu/drm/i915/display/icl_dsi.c b/drivers/gpu/drm/i915/display/icl_dsi.c index 638a00b2dc2d2..2601873e15466 100644 --- a/drivers/gpu/drm/i915/display/icl_dsi.c +++ b/drivers/gpu/drm/i915/display/icl_dsi.c @@ -29,6 +29,7 @@ #include <drm/drm_mipi_dsi.h> #include "intel_atomic.h" +#include "intel_backlight.h" #include "intel_combo_phy.h" #include "intel_connector.h" #include "intel_crtc.h" diff --git a/drivers/gpu/drm/i915/display/intel_backlight.c b/drivers/gpu/drm/i915/display/intel_backlight.c new file mode 100644 index 0000000000000..4b0086ee48519 --- /dev/null +++ b/drivers/gpu/drm/i915/display/intel_backlight.c @@ -0,0 +1,1778 @@ +// SPDX-License-Identifier: MIT +/* + * Copyright © 2021 Intel Corporation + */ + +#include <linux/kernel.h> +#include <linux/pwm.h> + +#include "intel_backlight.h" +#include "intel_connector.h" +#include "intel_de.h" +#include "intel_display_types.h" +#include "intel_dp_aux_backlight.h" +#include "intel_dsi_dcs_backlight.h" +#include "intel_panel.h" + +/** + * scale - scale values from one range to another + * @source_val: value in range [@source_min..@source_max] + * @source_min: minimum legal value for @source_val + * @source_max: maximum legal value for @source_val + * @target_min: corresponding target value for @source_min + * @target_max: corresponding target value for @source_max + * + * Return @source_val in range [@source_min..@source_max] scaled to range + * [@target_min..@target_max]. + */ +static u32 scale(u32 source_val, + u32 source_min, u32 source_max, + u32 target_min, u32 target_max) +{ + u64 target_val; + + WARN_ON(source_min > source_max); + WARN_ON(target_min > target_max); + + /* defensive */ + source_val = clamp(source_val, source_min, source_max); + + /* avoid overflows */ + target_val = mul_u32_u32(source_val - source_min, + target_max - target_min); + target_val = DIV_ROUND_CLOSEST_ULL(target_val, source_max - source_min); + target_val += target_min; + + return target_val; +} + +/* + * Scale user_level in range [0..user_max] to [0..hw_max], clamping the result + * to [hw_min..hw_max]. + */ +static u32 clamp_user_to_hw(struct intel_connector *connector, + u32 user_level, u32 user_max) +{ + struct intel_panel *panel = &connector->panel; + u32 hw_level; + + hw_level = scale(user_level, 0, user_max, 0, panel->backlight.max); + hw_level = clamp(hw_level, panel->backlight.min, panel->backlight.max); + + return hw_level; +} + +/* Scale hw_level in range [hw_min..hw_max] to [0..user_max]. */ +static u32 scale_hw_to_user(struct intel_connector *connector, + u32 hw_level, u32 user_max) +{ + struct intel_panel *panel = &connector->panel; + + return scale(hw_level, panel->backlight.min, panel->backlight.max, + 0, user_max); +} + +u32 intel_panel_invert_pwm_level(struct intel_connector *connector, u32 val) +{ + struct drm_i915_private *dev_priv = to_i915(connector->base.dev); + struct intel_panel *panel = &connector->panel; + + drm_WARN_ON(&dev_priv->drm, panel->backlight.pwm_level_max == 0); + + if (dev_priv->params.invert_brightness < 0) + return val; + + if (dev_priv->params.invert_brightness > 0 || + dev_priv->quirks & QUIRK_INVERT_BRIGHTNESS) { + return panel->backlight.pwm_level_max - val + panel->backlight.pwm_level_min; + } + + return val; +} + +void intel_panel_set_pwm_level(const struct drm_connector_state *conn_state, u32 val) +{ + struct intel_connector *connector = to_intel_connector(conn_state->connector); + struct drm_i915_private *i915 = to_i915(connector->base.dev); + struct intel_panel *panel = &connector->panel; + + drm_dbg_kms(&i915->drm, "set backlight PWM = %d\n", val); + panel->backlight.pwm_funcs->set(conn_state, val); +} + +u32 intel_panel_backlight_level_to_pwm(struct intel_connector *connector, u32 val) +{ + struct drm_i915_private *dev_priv = to_i915(connector->base.dev); + struct intel_panel *panel = &connector->panel; + + drm_WARN_ON_ONCE(&dev_priv->drm, + panel->backlight.max == 0 || panel->backlight.pwm_level_max == 0); + + val = scale(val, panel->backlight.min, panel->backlight.max, + panel->backlight.pwm_level_min, panel->backlight.pwm_level_max); + + return intel_panel_invert_pwm_level(connector, val); +} + +u32 intel_panel_backlight_level_from_pwm(struct intel_connector *connector, u32 val) +{ + struct drm_i915_private *dev_priv = to_i915(connector->base.dev); + struct intel_panel *panel = &connector->panel; + + drm_WARN_ON_ONCE(&dev_priv->drm, + panel->backlight.max == 0 || panel->backlight.pwm_level_max == 0); + + if (dev_priv->params.invert_brightness > 0 || + (dev_priv->params.invert_brightness == 0 && dev_priv->quirks & QUIRK_INVERT_BRIGHTNESS)) + val = panel->backlight.pwm_level_max - (val - panel->backlight.pwm_level_min); + + return scale(val, panel->backlight.pwm_level_min, panel->backlight.pwm_level_max, + panel->backlight.min, panel->backlight.max); +} + +static u32 lpt_get_backlight(struct intel_connector *connector, enum pipe unused) +{ + struct drm_i915_private *dev_priv = to_i915(connector->base.dev); + + return intel_de_read(dev_priv, BLC_PWM_PCH_CTL2) & BACKLIGHT_DUTY_CYCLE_MASK; +} + +static u32 pch_get_backlight(struct intel_connector *connector, enum pipe unused) +{ + struct drm_i915_private *dev_priv = to_i915(connector->base.dev); + + return intel_de_read(dev_priv, BLC_PWM_CPU_CTL) & BACKLIGHT_DUTY_CYCLE_MASK; +} + +static u32 i9xx_get_backlight(struct intel_connector *connector, enum pipe unused) +{ + struct drm_i915_private *dev_priv = to_i915(connector->base.dev); + struct intel_panel *panel = &connector->panel; + u32 val; + + val = intel_de_read(dev_priv, BLC_PWM_CTL) & BACKLIGHT_DUTY_CYCLE_MASK; + if (DISPLAY_VER(dev_priv) < 4) + val >>= 1; + + if (panel->backlight.combination_mode) { + u8 lbpc; + + pci_read_config_byte(to_pci_dev(dev_priv->drm.dev), LBPC, &lbpc); + val *= lbpc; + } + + return val; +} + +static u32 vlv_get_backlight(struct intel_connector *connector, enum pipe pipe) +{ + struct drm_i915_private *dev_priv = to_i915(connector->base.dev); + + if (drm_WARN_ON(&dev_priv->drm, pipe != PIPE_A && pipe != PIPE_B)) + return 0; + + return intel_de_read(dev_priv, VLV_BLC_PWM_CTL(pipe)) & BACKLIGHT_DUTY_CYCLE_MASK; +} + +static u32 bxt_get_backlight(struct intel_connector *connector, enum pipe unused) +{ + struct drm_i915_private *dev_priv = to_i915(connector->base.dev); + struct intel_panel *panel = &connector->panel; + + return intel_de_read(dev_priv, + BXT_BLC_PWM_DUTY(panel->backlight.controller)); +} + +static u32 ext_pwm_get_backlight(struct intel_connector *connector, enum pipe unused) +{ + struct intel_panel *panel = &connector->panel; + struct pwm_state state; + + pwm_get_state(panel->backlight.pwm, &state); + return pwm_get_relative_duty_cycle(&state, 100); +} + +static void lpt_set_backlight(const struct drm_connector_state *conn_state, u32 level) +{ + struct intel_connector *connector = to_intel_connector(conn_state->connector); + struct drm_i915_private *dev_priv = to_i915(connector->base.dev); + + u32 val = intel_de_read(dev_priv, BLC_PWM_PCH_CTL2) & ~BACKLIGHT_DUTY_CYCLE_MASK; + intel_de_write(dev_priv, BLC_PWM_PCH_CTL2, val | level); +} + +static void pch_set_backlight(const struct drm_connector_state *conn_state, u32 level) +{ + struct intel_connector *connector = to_intel_connector(conn_state->connector); + struct drm_i915_private *dev_priv = to_i915(connector->base.dev); + u32 tmp; + + tmp = intel_de_read(dev_priv, BLC_PWM_CPU_CTL) & ~BACKLIGHT_DUTY_CYCLE_MASK; + intel_de_write(dev_priv, BLC_PWM_CPU_CTL, tmp | level); +} + +static void i9xx_set_backlight(const struct drm_connector_state *conn_state, u32 level) +{ + struct intel_connector *connector = to_intel_connector(conn_state->connector); + struct drm_i915_private *dev_priv = to_i915(connector->base.dev); + struct intel_panel *panel = &connector->panel; + u32 tmp, mask; + + drm_WARN_ON(&dev_priv->drm, panel->backlight.pwm_level_max == 0); + + if (panel->backlight.combination_mode) { + u8 lbpc; + + lbpc = level * 0xfe / panel->backlight.pwm_level_max + 1; + level /= lbpc; + pci_write_config_byte(to_pci_dev(dev_priv->drm.dev), LBPC, lbpc); + } + + if (DISPLAY_VER(dev_priv) == 4) { + mask = BACKLIGHT_DUTY_CYCLE_MASK; + } else { + level <<= 1; + mask = BACKLIGHT_DUTY_CYCLE_MASK_PNV; + } + + tmp = intel_de_read(dev_priv, BLC_PWM_CTL) & ~mask; + intel_de_write(dev_priv, BLC_PWM_CTL, tmp | level); +} + +static void vlv_set_backlight(const struct drm_connector_state *conn_state, u32 level) +{ + struct intel_connector *connector = to_intel_connector(conn_state->connector); + struct drm_i915_private *dev_priv = to_i915(connector->base.dev); + enum pipe pipe = to_intel_crtc(conn_state->crtc)->pipe; + u32 tmp; + + tmp = intel_de_read(dev_priv, VLV_BLC_PWM_CTL(pipe)) & ~BACKLIGHT_DUTY_CYCLE_MASK; + intel_de_write(dev_priv, VLV_BLC_PWM_CTL(pipe), tmp | level); +} + +static void bxt_set_backlight(const struct drm_connector_state *conn_state, u32 level) +{ + struct intel_connector *connector = to_intel_connector(conn_state->connector); + struct drm_i915_private *dev_priv = to_i915(connector->base.dev); + struct intel_panel *panel = &connector->panel; + + intel_de_write(dev_priv, + BXT_BLC_PWM_DUTY(panel->backlight.controller), level); +} + +static void ext_pwm_set_backlight(const struct drm_connector_state *conn_state, u32 level) +{ + struct intel_panel *panel = &to_intel_connector(conn_state->connector)->panel; + + pwm_set_relative_duty_cycle(&panel->backlight.pwm_state, level, 100); + pwm_apply_state(panel->backlight.pwm, &panel->backlight.pwm_state); +} + +static void +intel_panel_actually_set_backlight(const struct drm_connector_state *conn_state, u32 level) +{ + struct intel_connector *connector = to_intel_connector(conn_state->connector); + struct drm_i915_private *i915 = to_i915(connector->base.dev); + struct intel_panel *panel = &connector->panel; + + drm_dbg_kms(&i915->drm, "set backlight level = %d\n", level); + + panel->backlight.funcs->set(conn_state, level); +} + +/* set backlight brightness to level in range [0..max], assuming hw min is + * respected. + */ +void intel_panel_set_backlight_acpi(const struct drm_connector_state *conn_state, + u32 user_level, u32 user_max) +{ + struct intel_connector *connector = to_intel_connector(conn_state->connector); + struct drm_i915_private *dev_priv = to_i915(connector->base.dev); + struct intel_panel *panel = &connector->panel; + u32 hw_level; + + /* + * Lack of crtc may occur during driver init because + * connection_mutex isn't held across the entire backlight + * setup + modeset readout, and the BIOS can issue the + * requests at any time. + */ + if (!panel->backlight.present || !conn_state->crtc) + return; + + mutex_lock(&dev_priv->backlight_lock); + + drm_WARN_ON(&dev_priv->drm, panel->backlight.max == 0); + + hw_level = clamp_user_to_hw(connector, user_level, user_max); + panel->backlight.level = hw_level; + + if (panel->backlight.device) + panel->backlight.device->props.brightness = + scale_hw_to_user(connector, + panel->backlight.level, + panel->backlight.device->props.max_brightness); + + if (panel->backlight.enabled) + intel_panel_actually_set_backlight(conn_state, hw_level); + + mutex_unlock(&dev_priv->backlight_lock); +} + +static void lpt_disable_backlight(const struct drm_connector_state *old_conn_state, u32 level) +{ + struct intel_connector *connector = to_intel_connector(old_conn_state->connector); + struct drm_i915_private *dev_priv = to_i915(connector->base.dev); + u32 tmp; + + intel_panel_set_pwm_level(old_conn_state, level); + + /* + * Although we don't support or enable CPU PWM with LPT/SPT based + * systems, it may have been enabled prior to loading the + * driver. Disable to avoid warnings on LCPLL disable. + * + * This needs rework if we need to add support for CPU PWM on PCH split + * platforms. + */ + tmp = intel_de_read(dev_priv, BLC_PWM_CPU_CTL2); + if (tmp & BLM_PWM_ENABLE) { + drm_dbg_kms(&dev_priv->drm, + "cpu backlight was enabled, disabling\n"); + intel_de_write(dev_priv, BLC_PWM_CPU_CTL2, + tmp & ~BLM_PWM_ENABLE); + } + + tmp = intel_de_read(dev_priv, BLC_PWM_PCH_CTL1); + intel_de_write(dev_priv, BLC_PWM_PCH_CTL1, tmp & ~BLM_PCH_PWM_ENABLE); +} + +static void pch_disable_backlight(const struct drm_connector_state *old_conn_state, u32 val) +{ + struct intel_connector *connector = to_intel_connector(old_conn_state->connector); + struct drm_i915_private *dev_priv = to_i915(connector->base.dev); + u32 tmp; + + intel_panel_set_pwm_level(old_conn_state, val); + + tmp = intel_de_read(dev_priv, BLC_PWM_CPU_CTL2); + intel_de_write(dev_priv, BLC_PWM_CPU_CTL2, tmp & ~BLM_PWM_ENABLE); + + tmp = intel_de_read(dev_priv, BLC_PWM_PCH_CTL1); + intel_de_write(dev_priv, BLC_PWM_PCH_CTL1, tmp & ~BLM_PCH_PWM_ENABLE); +} + +static void i9xx_disable_backlight(const struct drm_connector_state *old_conn_state, u32 val) +{ + intel_panel_set_pwm_level(old_conn_state, val); +} + +static void i965_disable_backlight(const struct drm_connector_state *old_conn_state, u32 val) +{ + struct drm_i915_private *dev_priv = to_i915(old_conn_state->connector->dev); + u32 tmp; + + intel_panel_set_pwm_level(old_conn_state, val); + + tmp = intel_de_read(dev_priv, BLC_PWM_CTL2); + intel_de_write(dev_priv, BLC_PWM_CTL2, tmp & ~BLM_PWM_ENABLE); +} + +static void vlv_disable_backlight(const struct drm_connector_state *old_conn_state, u32 val) +{ + struct intel_connector *connector = to_intel_connector(old_conn_state->connector); + struct drm_i915_private *dev_priv = to_i915(connector->base.dev); + enum pipe pipe = to_intel_crtc(old_conn_state->crtc)->pipe; + u32 tmp; + + intel_panel_set_pwm_level(old_conn_state, val); + + tmp = intel_de_read(dev_priv, VLV_BLC_PWM_CTL2(pipe)); + intel_de_write(dev_priv, VLV_BLC_PWM_CTL2(pipe), + tmp & ~BLM_PWM_ENABLE); +} + +static void bxt_disable_backlight(const struct drm_connector_state *old_conn_state, u32 val) +{ + struct intel_connector *connector = to_intel_connector(old_conn_state->connector); + struct drm_i915_private *dev_priv = to_i915(connector->base.dev); + struct intel_panel *panel = &connector->panel; + u32 tmp; + + intel_panel_set_pwm_level(old_conn_state, val); + + tmp = intel_de_read(dev_priv, + BXT_BLC_PWM_CTL(panel->backlight.controller)); + intel_de_write(dev_priv, BXT_BLC_PWM_CTL(panel->backlight.controller), + tmp & ~BXT_BLC_PWM_ENABLE); + + if (panel->backlight.controller == 1) { + val = intel_de_read(dev_priv, UTIL_PIN_CTL); + val &= ~UTIL_PIN_ENABLE; + intel_de_write(dev_priv, UTIL_PIN_CTL, val); + } +} + +static void cnp_disable_backlight(const struct drm_connector_state *old_conn_state, u32 val) +{ + struct intel_connector *connector = to_intel_connector(old_conn_state->connector); + struct drm_i915_private *dev_priv = to_i915(connector->base.dev); + struct intel_panel *panel = &connector->panel; + u32 tmp; + + intel_panel_set_pwm_level(old_conn_state, val); + + tmp = intel_de_read(dev_priv, + BXT_BLC_PWM_CTL(panel->backlight.controller)); + intel_de_write(dev_priv, BXT_BLC_PWM_CTL(panel->backlight.controller), + tmp & ~BXT_BLC_PWM_ENABLE); +} + +static void ext_pwm_disable_backlight(const struct drm_connector_state *old_conn_state, u32 level) +{ + struct intel_connector *connector = to_intel_connector(old_conn_state->connector); + struct intel_panel *panel = &connector->panel; + + panel->backlight.pwm_state.enabled = false; + pwm_apply_state(panel->backlight.pwm, &panel->backlight.pwm_state); +} + +void intel_panel_disable_backlight(const struct drm_connector_state *old_conn_state) +{ + struct intel_connector *connector = to_intel_connector(old_conn_state->connector); + struct drm_i915_private *dev_priv = to_i915(connector->base.dev); + struct intel_panel *panel = &connector->panel; + + if (!panel->backlight.present) + return; + + /* + * Do not disable backlight on the vga_switcheroo path. When switching + * away from i915, the other client may depend on i915 to handle the + * backlight. This will leave the backlight on unnecessarily when + * another client is not activated. + */ + if (dev_priv->drm.switch_power_state == DRM_SWITCH_POWER_CHANGING) { + drm_dbg_kms(&dev_priv->drm, + "Skipping backlight disable on vga switch\n"); + return; + } + + mutex_lock(&dev_priv->backlight_lock); + + if (panel->backlight.device) + panel->backlight.device->props.power = FB_BLANK_POWERDOWN; + panel->backlight.enabled = false; + panel->backlight.funcs->disable(old_conn_state, 0); + + mutex_unlock(&dev_priv->backlight_lock); +} + +static void lpt_enable_backlight(const struct intel_crtc_state *crtc_state, + const struct drm_connector_state *conn_state, u32 level) +{ + struct intel_connector *connector = to_intel_connector(conn_state->connector); + struct drm_i915_private *dev_priv = to_i915(connector->base.dev); + struct intel_panel *panel = &connector->panel; + u32 pch_ctl1, pch_ctl2, schicken; + + pch_ctl1 = intel_de_read(dev_priv, BLC_PWM_PCH_CTL1); + if (pch_ctl1 & BLM_PCH_PWM_ENABLE) { + drm_dbg_kms(&dev_priv->drm, "pch backlight already enabled\n"); + pch_ctl1 &= ~BLM_PCH_PWM_ENABLE; + intel_de_write(dev_priv, BLC_PWM_PCH_CTL1, pch_ctl1); + } + + if (HAS_PCH_LPT(dev_priv)) { + schicken = intel_de_read(dev_priv, SOUTH_CHICKEN2); + if (panel->backlight.alternate_pwm_increment) + schicken |= LPT_PWM_GRANULARITY; + else + schicken &= ~LPT_PWM_GRANULARITY; + intel_de_write(dev_priv, SOUTH_CHICKEN2, schicken); + } else { + schicken = intel_de_read(dev_priv, SOUTH_CHICKEN1); + if (panel->backlight.alternate_pwm_increment) + schicken |= SPT_PWM_GRANULARITY; + else + schicken &= ~SPT_PWM_GRANULARITY; + intel_de_write(dev_priv, SOUTH_CHICKEN1, schicken); + } + + pch_ctl2 = panel->backlight.pwm_level_max << 16; + intel_de_write(dev_priv, BLC_PWM_PCH_CTL2, pch_ctl2); + + pch_ctl1 = 0; + if (panel->backlight.active_low_pwm) + pch_ctl1 |= BLM_PCH_POLARITY; + + /* After LPT, override is the default. */ + if (HAS_PCH_LPT(dev_priv)) + pch_ctl1 |= BLM_PCH_OVERRIDE_ENABLE; + + intel_de_write(dev_priv, BLC_PWM_PCH_CTL1, pch_ctl1); + intel_de_posting_read(dev_priv, BLC_PWM_PCH_CTL1); + intel_de_write(dev_priv, BLC_PWM_PCH_CTL1, + pch_ctl1 | BLM_PCH_PWM_ENABLE); + + /* This won't stick until the above enable. */ + intel_panel_set_pwm_level(conn_state, level); +} + +static void pch_enable_backlight(const struct intel_crtc_state *crtc_state, + const struct drm_connector_state *conn_state, u32 level) +{ + struct intel_connector *connector = to_intel_connector(conn_state->connector); + struct drm_i915_private *dev_priv = to_i915(connector->base.dev); + struct intel_panel *panel = &connector->panel; + enum transcoder cpu_transcoder = crtc_state->cpu_transcoder; + u32 cpu_ctl2, pch_ctl1, pch_ctl2; + + cpu_ctl2 = intel_de_read(dev_priv, BLC_PWM_CPU_CTL2); + if (cpu_ctl2 & BLM_PWM_ENABLE) { + drm_dbg_kms(&dev_priv->drm, "cpu backlight already enabled\n"); + cpu_ctl2 &= ~BLM_PWM_ENABLE; + intel_de_write(dev_priv, BLC_PWM_CPU_CTL2, cpu_ctl2); + } + + pch_ctl1 = intel_de_read(dev_priv, BLC_PWM_PCH_CTL1); + if (pch_ctl1 & BLM_PCH_PWM_ENABLE) { + drm_dbg_kms(&dev_priv->drm, "pch backlight already enabled\n"); + pch_ctl1 &= ~BLM_PCH_PWM_ENABLE; + intel_de_write(dev_priv, BLC_PWM_PCH_CTL1, pch_ctl1); + } + + if (cpu_transcoder == TRANSCODER_EDP) + cpu_ctl2 = BLM_TRANSCODER_EDP; + else + cpu_ctl2 = BLM_PIPE(cpu_transcoder); + intel_de_write(dev_priv, BLC_PWM_CPU_CTL2, cpu_ctl2); + intel_de_posting_read(dev_priv, BLC_PWM_CPU_CTL2); + intel_de_write(dev_priv, BLC_PWM_CPU_CTL2, cpu_ctl2 | BLM_PWM_ENABLE); + + /* This won't stick until the above enable. */ + intel_panel_set_pwm_level(conn_state, level); + + pch_ctl2 = panel->backlight.pwm_level_max << 16; + intel_de_write(dev_priv, BLC_PWM_PCH_CTL2, pch_ctl2); + + pch_ctl1 = 0; + if (panel->backlight.active_low_pwm) + pch_ctl1 |= BLM_PCH_POLARITY; + + intel_de_write(dev_priv, BLC_PWM_PCH_CTL1, pch_ctl1); + intel_de_posting_read(dev_priv, BLC_PWM_PCH_CTL1); + intel_de_write(dev_priv, BLC_PWM_PCH_CTL1, + pch_ctl1 | BLM_PCH_PWM_ENABLE); +} + +static void i9xx_enable_backlight(const struct intel_crtc_state *crtc_state, + const struct drm_connector_state *conn_state, u32 level) +{ + struct intel_connector *connector = to_intel_connector(conn_state->connector); + struct drm_i915_private *dev_priv = to_i915(connector->base.dev); + struct intel_panel *panel = &connector->panel; + u32 ctl, freq; + + ctl = intel_de_read(dev_priv, BLC_PWM_CTL); + if (ctl & BACKLIGHT_DUTY_CYCLE_MASK_PNV) { + drm_dbg_kms(&dev_priv->drm, "backlight already enabled\n"); + intel_de_write(dev_priv, BLC_PWM_CTL, 0); + } + + freq = panel->backlight.pwm_level_max; + if (panel->backlight.combination_mode) + freq /= 0xff; + + ctl = freq << 17; + if (panel->backlight.combination_mode) + ctl |= BLM_LEGACY_MODE; + if (IS_PINEVIEW(dev_priv) && panel->backlight.active_low_pwm) + ctl |= BLM_POLARITY_PNV; + + intel_de_write(dev_priv, BLC_PWM_CTL, ctl); + intel_de_posting_read(dev_priv, BLC_PWM_CTL); + + /* XXX: combine this into above write? */ + intel_panel_set_pwm_level(conn_state, level); + + /* + * Needed to enable backlight on some 855gm models. BLC_HIST_CTL is + * 855gm only, but checking for gen2 is safe, as 855gm is the only gen2 + * that has backlight. + */ + if (DISPLAY_VER(dev_priv) == 2) + intel_de_write(dev_priv, BLC_HIST_CTL, BLM_HISTOGRAM_ENABLE); +} + +static void i965_enable_backlight(const struct intel_crtc_state *crtc_state, + const struct drm_connector_state *conn_state, u32 level) +{ + struct intel_connector *connector = to_intel_connector(conn_state->connector); + struct drm_i915_private *dev_priv = to_i915(connector->base.dev); + struct intel_panel *panel = &connector->panel; + enum pipe pipe = to_intel_crtc(conn_state->crtc)->pipe; + u32 ctl, ctl2, freq; + + ctl2 = intel_de_read(dev_priv, BLC_PWM_CTL2); + if (ctl2 & BLM_PWM_ENABLE) { + drm_dbg_kms(&dev_priv->drm, "backlight already enabled\n"); + ctl2 &= ~BLM_PWM_ENABLE; + intel_de_write(dev_priv, BLC_PWM_CTL2, ctl2); + } + + freq = panel->backlight.pwm_level_max; + if (panel->backlight.combination_mode) + freq /= 0xff; + + ctl = freq << 16; + intel_de_write(dev_priv, BLC_PWM_CTL, ctl); + + ctl2 = BLM_PIPE(pipe); + if (panel->backlight.combination_mode) + ctl2 |= BLM_COMBINATION_MODE; + if (panel->backlight.active_low_pwm) + ctl2 |= BLM_POLARITY_I965; + intel_de_write(dev_priv, BLC_PWM_CTL2, ctl2); + intel_de_posting_read(dev_priv, BLC_PWM_CTL2); + intel_de_write(dev_priv, BLC_PWM_CTL2, ctl2 | BLM_PWM_ENABLE); + + intel_panel_set_pwm_level(conn_state, level); +} + +static void vlv_enable_backlight(const struct intel_crtc_state *crtc_state, + const struct drm_connector_state *conn_state, u32 level) +{ + struct intel_connector *connector = to_intel_connector(conn_state->connector); + struct drm_i915_private *dev_priv = to_i915(connector->base.dev); + struct intel_panel *panel = &connector->panel; + enum pipe pipe = to_intel_crtc(crtc_state->uapi.crtc)->pipe; + u32 ctl, ctl2; + + ctl2 = intel_de_read(dev_priv, VLV_BLC_PWM_CTL2(pipe)); + if (ctl2 & BLM_PWM_ENABLE) { + drm_dbg_kms(&dev_priv->drm, "backlight already enabled\n"); + ctl2 &= ~BLM_PWM_ENABLE; + intel_de_write(dev_priv, VLV_BLC_PWM_CTL2(pipe), ctl2); + } + + ctl = panel->backlight.pwm_level_max << 16; + intel_de_write(dev_priv, VLV_BLC_PWM_CTL(pipe), ctl); + + /* XXX: combine this into above write? */ + intel_panel_set_pwm_level(conn_state, level); + + ctl2 = 0; + if (panel->backlight.active_low_pwm) + ctl2 |= BLM_POLARITY_I965; + intel_de_write(dev_priv, VLV_BLC_PWM_CTL2(pipe), ctl2); + intel_de_posting_read(dev_priv, VLV_BLC_PWM_CTL2(pipe)); + intel_de_write(dev_priv, VLV_BLC_PWM_CTL2(pipe), + ctl2 | BLM_PWM_ENABLE); +} + +static void bxt_enable_backlight(const struct intel_crtc_state *crtc_state, + const struct drm_connector_state *conn_state, u32 level) +{ + struct intel_connector *connector = to_intel_connector(conn_state->connector); + struct drm_i915_private *dev_priv = to_i915(connector->base.dev); + struct intel_panel *panel = &connector->panel; + enum pipe pipe = to_intel_crtc(crtc_state->uapi.crtc)->pipe; + u32 pwm_ctl, val; + + /* Controller 1 uses the utility pin. */ + if (panel->backlight.controller == 1) { + val = intel_de_read(dev_priv, UTIL_PIN_CTL); + if (val & UTIL_PIN_ENABLE) { + drm_dbg_kms(&dev_priv->drm, + "util pin already enabled\n"); + val &= ~UTIL_PIN_ENABLE; + intel_de_write(dev_priv, UTIL_PIN_CTL, val); + } + + val = 0; + if (panel->backlight.util_pin_active_low) + val |= UTIL_PIN_POLARITY; + intel_de_write(dev_priv, UTIL_PIN_CTL, + val | UTIL_PIN_PIPE(pipe) | UTIL_PIN_MODE_PWM | UTIL_PIN_ENABLE); + } + + pwm_ctl = intel_de_read(dev_priv, + BXT_BLC_PWM_CTL(panel->backlight.controller)); + if (pwm_ctl & BXT_BLC_PWM_ENABLE) { + drm_dbg_kms(&dev_priv->drm, "backlight already enabled\n"); + pwm_ctl &= ~BXT_BLC_PWM_ENABLE; + intel_de_write(dev_priv, + BXT_BLC_PWM_CTL(panel->backlight.controller), + pwm_ctl); + } + + intel_de_write(dev_priv, + BXT_BLC_PWM_FREQ(panel->backlight.controller), + panel->backlight.pwm_level_max); + + intel_panel_set_pwm_level(conn_state, level); + + pwm_ctl = 0; + if (panel->backlight.active_low_pwm) + pwm_ctl |= BXT_BLC_PWM_POLARITY; + + intel_de_write(dev_priv, BXT_BLC_PWM_CTL(panel->backlight.controller), + pwm_ctl); + intel_de_posting_read(dev_priv, + BXT_BLC_PWM_CTL(panel->backlight.controller)); + intel_de_write(dev_priv, BXT_BLC_PWM_CTL(panel->backlight.controller), + pwm_ctl | BXT_BLC_PWM_ENABLE); +} + +static void cnp_enable_backlight(const struct intel_crtc_state *crtc_state, + const struct drm_connector_state *conn_state, u32 level) +{ + struct intel_connector *connector = to_intel_connector(conn_state->connector); + struct drm_i915_private *dev_priv = to_i915(connector->base.dev); + struct intel_panel *panel = &connector->panel; + u32 pwm_ctl; + + pwm_ctl = intel_de_read(dev_priv, + BXT_BLC_PWM_CTL(panel->backlight.controller)); + if (pwm_ctl & BXT_BLC_PWM_ENABLE) { + drm_dbg_kms(&dev_priv->drm, "backlight already enabled\n"); + pwm_ctl &= ~BXT_BLC_PWM_ENABLE; + intel_de_write(dev_priv, + BXT_BLC_PWM_CTL(panel->backlight.controller), + pwm_ctl); + } + + intel_de_write(dev_priv, + BXT_BLC_PWM_FREQ(panel->backlight.controller), + panel->backlight.pwm_level_max); + + intel_panel_set_pwm_level(conn_state, level); + + pwm_ctl = 0; + if (panel->backlight.active_low_pwm) + pwm_ctl |= BXT_BLC_PWM_POLARITY; + + intel_de_write(dev_priv, BXT_BLC_PWM_CTL(panel->backlight.controller), + pwm_ctl); + intel_de_posting_read(dev_priv, + BXT_BLC_PWM_CTL(panel->backlight.controller)); + intel_de_write(dev_priv, BXT_BLC_PWM_CTL(panel->backlight.controller), + pwm_ctl | BXT_BLC_PWM_ENABLE); +} + +static void ext_pwm_enable_backlight(const struct intel_crtc_state *crtc_state, + const struct drm_connector_state *conn_state, u32 level) +{ + struct intel_connector *connector = to_intel_connector(conn_state->connector); + struct intel_panel *panel = &connector->panel; + + pwm_set_relative_duty_cycle(&panel->backlight.pwm_state, level, 100); + panel->backlight.pwm_state.enabled = true; + pwm_apply_state(panel->backlight.pwm, &panel->backlight.pwm_state); +} + +static void __intel_panel_enable_backlight(const struct intel_crtc_state *crtc_state, + const struct drm_connector_state *conn_state) +{ + struct intel_connector *connector = to_intel_connector(conn_state->connector); + struct intel_panel *panel = &connector->panel; + + WARN_ON(panel->backlight.max == 0); + + if (panel->backlight.level <= panel->backlight.min) { + panel->backlight.level = panel->backlight.max; + if (panel->backlight.device) + panel->backlight.device->props.brightness = + scale_hw_to_user(connector, + panel->backlight.level, + panel->backlight.device->props.max_brightness); + } + + panel->backlight.funcs->enable(crtc_state, conn_state, panel->backlight.level); + panel->backlight.enabled = true; + if (panel->backlight.device) + panel->backlight.device->props.power = FB_BLANK_UNBLANK; +} + +void intel_panel_enable_backlight(const struct intel_crtc_state *crtc_state, + const struct drm_connector_state *conn_state) +{ + struct intel_connector *connector = to_intel_connector(conn_state->connector); + struct drm_i915_private *dev_priv = to_i915(connector->base.dev); + struct intel_panel *panel = &connector->panel; + enum pipe pipe = to_intel_crtc(crtc_state->uapi.crtc)->pipe; + + if (!panel->backlight.present) + return; + + drm_dbg_kms(&dev_priv->drm, "pipe %c\n", pipe_name(pipe)); + + mutex_lock(&dev_priv->backlight_lock); + + __intel_panel_enable_backlight(crtc_state, conn_state); + + mutex_unlock(&dev_priv->backlight_lock); +} + +#if IS_ENABLED(CONFIG_BACKLIGHT_CLASS_DEVICE) +static u32 intel_panel_get_backlight(struct intel_connector *connector) +{ + struct drm_i915_private *dev_priv = to_i915(connector->base.dev); + struct intel_panel *panel = &connector->panel; + u32 val = 0; + + mutex_lock(&dev_priv->backlight_lock); + + if (panel->backlight.enabled) + val = panel->backlight.funcs->get(connector, intel_connector_get_pipe(connector)); + + mutex_unlock(&dev_priv->backlight_lock); + + drm_dbg_kms(&dev_priv->drm, "get backlight PWM = %d\n", val); + return val; +} + +/* Scale user_level in range [0..user_max] to [hw_min..hw_max]. */ +static u32 scale_user_to_hw(struct intel_connector *connector, + u32 user_level, u32 user_max) +{ + struct intel_panel *panel = &connector->panel; + + return scale(user_level, 0, user_max, + panel->backlight.min, panel->backlight.max); +} + +/* set backlight brightness to level in range [0..max], scaling wrt hw min */ +static void intel_panel_set_backlight(const struct drm_connector_state *conn_state, + u32 user_level, u32 user_max) +{ + struct intel_connector *connector = to_intel_connector(conn_state->connector); + struct drm_i915_private *dev_priv = to_i915(connector->base.dev); + struct intel_panel *panel = &connector->panel; + u32 hw_level; + + if (!panel->backlight.present) + return; + + mutex_lock(&dev_priv->backlight_lock); + + drm_WARN_ON(&dev_priv->drm, panel->backlight.max == 0); + + hw_level = scale_user_to_hw(connector, user_level, user_max); + panel->backlight.level = hw_level; + + if (panel->backlight.enabled) + intel_panel_actually_set_backlight(conn_state, hw_level); + + mutex_unlock(&dev_priv->backlight_lock); +} + +static int intel_backlight_device_update_status(struct backlight_device *bd) +{ + struct intel_connector *connector = bl_get_data(bd); + struct intel_panel *panel = &connector->panel; + struct drm_device *dev = connector->base.dev; + + drm_modeset_lock(&dev->mode_config.connection_mutex, NULL); + DRM_DEBUG_KMS("updating intel_backlight, brightness=%d/%d\n", + bd->props.brightness, bd->props.max_brightness); + intel_panel_set_backlight(connector->base.state, bd->props.brightness, + bd->props.max_brightness); + + /* + * Allow flipping bl_power as a sub-state of enabled. Sadly the + * backlight class device does not make it easy to differentiate + * between callbacks for brightness and bl_power, so our backlight_power + * callback needs to take this into account. + */ + if (panel->backlight.enabled) { + if (panel->backlight.power) { + bool enable = bd->props.power == FB_BLANK_UNBLANK && + bd->props.brightness != 0; + panel->backlight.power(connector, enable); + } + } else { + bd->props.power = FB_BLANK_POWERDOWN; + } + + drm_modeset_unlock(&dev->mode_config.connection_mutex); + return 0; +} + +static int intel_backlight_device_get_brightness(struct backlight_device *bd) +{ + struct intel_connector *connector = bl_get_data(bd); + struct drm_device *dev = connector->base.dev; + struct drm_i915_private *dev_priv = to_i915(dev); + intel_wakeref_t wakeref; + int ret = 0; + + with_intel_runtime_pm(&dev_priv->runtime_pm, wakeref) { + u32 hw_level; + + drm_modeset_lock(&dev->mode_config.connection_mutex, NULL); + + hw_level = intel_panel_get_backlight(connector); + ret = scale_hw_to_user(connector, + hw_level, bd->props.max_brightness); + + drm_modeset_unlock(&dev->mode_config.connection_mutex); + } + + return ret; +} + +static const struct backlight_ops intel_backlight_device_ops = { + .update_status = intel_backlight_device_update_status, + .get_brightness = intel_backlight_device_get_brightness, +}; + +int intel_backlight_device_register(struct intel_connector *connector) +{ + struct drm_i915_private *i915 = to_i915(connector->base.dev); + struct intel_panel *panel = &connector->panel; + struct backlight_properties props; + struct backlight_device *bd; + const char *name; + int ret = 0; + + if (WARN_ON(panel->backlight.device)) + return -ENODEV; + + if (!panel->backlight.present) + return 0; + + WARN_ON(panel->backlight.max == 0); + + memset(&props, 0, sizeof(props)); + props.type = BACKLIGHT_RAW; + + /* + * Note: Everything should work even if the backlight device max + * presented to the userspace is arbitrarily chosen. + */ + props.max_brightness = panel->backlight.max; + props.brightness = scale_hw_to_user(connector, + panel->backlight.level, + props.max_brightness); + + if (panel->backlight.enabled) + props.power = FB_BLANK_UNBLANK; + else + props.power = FB_BLANK_POWERDOWN; + + name = kstrdup("intel_backlight", GFP_KERNEL); + if (!name) + return -ENOMEM; + + bd = backlight_device_register(name, connector->base.kdev, connector, + &intel_backlight_device_ops, &props); + + /* + * Using the same name independent of the drm device or connector + * prevents registration of multiple backlight devices in the + * driver. However, we need to use the default name for backward + * compatibility. Use unique names for subsequent backlight devices as a + * fallback when the default name already exists. + */ + if (IS_ERR(bd) && PTR_ERR(bd) == -EEXIST) { + kfree(name); + name = kasprintf(GFP_KERNEL, "card%d-%s-backlight", + i915->drm.primary->index, connector->base.name); + if (!name) + return -ENOMEM; + + bd = backlight_device_register(name, connector->base.kdev, connector, + &intel_backlight_device_ops, &props); + } + + if (IS_ERR(bd)) { + drm_err(&i915->drm, + "[CONNECTOR:%d:%s] backlight device %s register failed: %ld\n", + connector->base.base.id, connector->base.name, name, PTR_ERR(bd)); + ret = PTR_ERR(bd); + goto out; + } + + panel->backlight.device = bd; + + drm_dbg_kms(&i915->drm, + "[CONNECTOR:%d:%s] backlight device %s registered\n", + connector->base.base.id, connector->base.name, name); + +out: + kfree(name); + + return ret; +} + +void intel_backlight_device_unregister(struct intel_connector *connector) +{ + struct intel_panel *panel = &connector->panel; + + if (panel->backlight.device) { + backlight_device_unregister(panel->backlight.device); + panel->backlight.device = NULL; + } +} +#endif /* CONFIG_BACKLIGHT_CLASS_DEVICE */ + +/* + * CNP: PWM clock frequency is 19.2 MHz or 24 MHz. + * PWM increment = 1 + */ +static u32 cnp_hz_to_pwm(struct intel_connector *connector, u32 pwm_freq_hz) +{ + struct drm_i915_private *dev_priv = to_i915(connector->base.dev); + + return DIV_ROUND_CLOSEST(KHz(RUNTIME_INFO(dev_priv)->rawclk_freq), + pwm_freq_hz); +} + +/* + * BXT: PWM clock frequency = 19.2 MHz. + */ +static u32 bxt_hz_to_pwm(struct intel_connector *connector, u32 pwm_freq_hz) +{ + return DIV_ROUND_CLOSEST(KHz(19200), pwm_freq_hz); +} + +/* + * SPT: This value represents the period of the PWM stream in clock periods + * multiplied by 16 (default increment) or 128 (alternate increment selected in + * SCHICKEN_1 bit 0). PWM clock is 24 MHz. + */ +static u32 spt_hz_to_pwm(struct intel_connector *connector, u32 pwm_freq_hz) +{ + struct intel_panel *panel = &connector->panel; + u32 mul; + + if (panel->backlight.alternate_pwm_increment) + mul = 128; + else + mul = 16; + + return DIV_ROUND_CLOSEST(MHz(24), pwm_freq_hz * mul); +} + +/* + * LPT: This value represents the period of the PWM stream in clock periods + * multiplied by 128 (default increment) or 16 (alternate increment, selected in + * LPT SOUTH_CHICKEN2 register bit 5). + */ +static u32 lpt_hz_to_pwm(struct intel_connector *connector, u32 pwm_freq_hz) +{ + struct drm_i915_private *dev_priv = to_i915(connector->base.dev); + struct intel_panel *panel = &connector->panel; + u32 mul, clock; + + if (panel->backlight.alternate_pwm_increment) + mul = 16; + else + mul = 128; + + if (HAS_PCH_LPT_H(dev_priv)) + clock = MHz(135); /* LPT:H */ + else + clock = MHz(24); /* LPT:LP */ + + return DIV_ROUND_CLOSEST(clock, pwm_freq_hz * mul); +} + +/* + * ILK/SNB/IVB: This value represents the period of the PWM stream in PCH + * display raw clocks multiplied by 128. + */ +static u32 pch_hz_to_pwm(struct intel_connector *connector, u32 pwm_freq_hz) +{ + struct drm_i915_private *dev_priv = to_i915(connector->base.dev); + + return DIV_ROUND_CLOSEST(KHz(RUNTIME_INFO(dev_priv)->rawclk_freq), + pwm_freq_hz * 128); +} + +/* + * Gen2: This field determines the number of time base events (display core + * clock frequency/32) in total for a complete cycle of modulated backlight + * control. + * + * Gen3: A time base event equals the display core clock ([DevPNV] HRAW clock) + * divided by 32. + */ +static u32 i9xx_hz_to_pwm(struct intel_connector *connector, u32 pwm_freq_hz) +{ + struct drm_i915_private *dev_priv = to_i915(connector->base.dev); + int clock; + + if (IS_PINEVIEW(dev_priv)) + clock = KHz(RUNTIME_INFO(dev_priv)->rawclk_freq); + else + clock = KHz(dev_priv->cdclk.hw.cdclk); + + return DIV_ROUND_CLOSEST(clock, pwm_freq_hz * 32); +} + +/* + * Gen4: This value represents the period of the PWM stream in display core + * clocks ([DevCTG] HRAW clocks) multiplied by 128. + * + */ +static u32 i965_hz_to_pwm(struct intel_connector *connector, u32 pwm_freq_hz) +{ + struct drm_i915_private *dev_priv = to_i915(connector->base.dev); + int clock; + + if (IS_G4X(dev_priv)) + clock = KHz(RUNTIME_INFO(dev_priv)->rawclk_freq); + else + clock = KHz(dev_priv->cdclk.hw.cdclk); + + return DIV_ROUND_CLOSEST(clock, pwm_freq_hz * 128); +} + +/* + * VLV: This value represents the period of the PWM stream in display core + * clocks ([DevCTG] 200MHz HRAW clocks) multiplied by 128 or 25MHz S0IX clocks + * multiplied by 16. CHV uses a 19.2MHz S0IX clock. + */ +static u32 vlv_hz_to_pwm(struct intel_connector *connector, u32 pwm_freq_hz) +{ + struct drm_i915_private *dev_priv = to_i915(connector->base.dev); + int mul, clock; + + if ((intel_de_read(dev_priv, CBR1_VLV) & CBR_PWM_CLOCK_MUX_SELECT) == 0) { + if (IS_CHERRYVIEW(dev_priv)) + clock = KHz(19200); + else + clock = MHz(25); + mul = 16; + } else { + clock = KHz(RUNTIME_INFO(dev_priv)->rawclk_freq); + mul = 128; + } + + return DIV_ROUND_CLOSEST(clock, pwm_freq_hz * mul); +} + +static u16 get_vbt_pwm_freq(struct drm_i915_private *dev_priv) +{ + u16 pwm_freq_hz = dev_priv->vbt.backlight.pwm_freq_hz; + + if (pwm_freq_hz) { + drm_dbg_kms(&dev_priv->drm, + "VBT defined backlight frequency %u Hz\n", + pwm_freq_hz); + } else { + pwm_freq_hz = 200; + drm_dbg_kms(&dev_priv->drm, + "default backlight frequency %u Hz\n", + pwm_freq_hz); + } + + return pwm_freq_hz; +} + +static u32 get_backlight_max_vbt(struct intel_connector *connector) +{ + struct drm_i915_private *dev_priv = to_i915(connector->base.dev); + struct intel_panel *panel = &connector->panel; + u16 pwm_freq_hz = get_vbt_pwm_freq(dev_priv); + u32 pwm; + + if (!panel->backlight.pwm_funcs->hz_to_pwm) { + drm_dbg_kms(&dev_priv->drm, + "backlight frequency conversion not supported\n"); + return 0; + } + + pwm = panel->backlight.pwm_funcs->hz_to_pwm(connector, pwm_freq_hz); + if (!pwm) { + drm_dbg_kms(&dev_priv->drm, + "backlight frequency conversion failed\n"); + return 0; + } + + return pwm; +} + +/* + * Note: The setup hooks can't assume pipe is set! + */ +static u32 get_backlight_min_vbt(struct intel_connector *connector) +{ + struct drm_i915_private *dev_priv = to_i915(connector->base.dev); + struct intel_panel *panel = &connector->panel; + int min; + + drm_WARN_ON(&dev_priv->drm, panel->backlight.pwm_level_max == 0); + + /* + * XXX: If the vbt value is 255, it makes min equal to max, which leads + * to problems. There are such machines out there. Either our + * interpretation is wrong or the vbt has bogus data. Or both. Safeguard + * against this by letting the minimum be at most (arbitrarily chosen) + * 25% of the max. + */ + min = clamp_t(int, dev_priv->vbt.backlight.min_brightness, 0, 64); + if (min != dev_priv->vbt.backlight.min_brightness) { + drm_dbg_kms(&dev_priv->drm, + "clamping VBT min backlight %d/255 to %d/255\n", + dev_priv->vbt.backlight.min_brightness, min); + } + + /* vbt value is a coefficient in range [0..255] */ + return scale(min, 0, 255, 0, panel->backlight.pwm_level_max); +} + +static int lpt_setup_backlight(struct intel_connector *connector, enum pipe unused) +{ + struct drm_i915_private *dev_priv = to_i915(connector->base.dev); + struct intel_panel *panel = &connector->panel; + u32 cpu_ctl2, pch_ctl1, pch_ctl2, val; + bool alt, cpu_mode; + + if (HAS_PCH_LPT(dev_priv)) + alt = intel_de_read(dev_priv, SOUTH_CHICKEN2) & LPT_PWM_GRANULARITY; + else + alt = intel_de_read(dev_priv, SOUTH_CHICKEN1) & SPT_PWM_GRANULARITY; + panel->backlight.alternate_pwm_increment = alt; + + pch_ctl1 = intel_de_read(dev_priv, BLC_PWM_PCH_CTL1); + panel->backlight.active_low_pwm = pch_ctl1 & BLM_PCH_POLARITY; + + pch_ctl2 = intel_de_read(dev_priv, BLC_PWM_PCH_CTL2); + panel->backlight.pwm_level_max = pch_ctl2 >> 16; + + cpu_ctl2 = intel_de_read(dev_priv, BLC_PWM_CPU_CTL2); + + if (!panel->backlight.pwm_level_max) + panel->backlight.pwm_level_max = get_backlight_max_vbt(connector); + + if (!panel->backlight.pwm_level_max) + return -ENODEV; + + panel->backlight.pwm_level_min = get_backlight_min_vbt(connector); + + panel->backlight.pwm_enabled = pch_ctl1 & BLM_PCH_PWM_ENABLE; + + cpu_mode = panel->backlight.pwm_enabled && HAS_PCH_LPT(dev_priv) && + !(pch_ctl1 & BLM_PCH_OVERRIDE_ENABLE) && + (cpu_ctl2 & BLM_PWM_ENABLE); + + if (cpu_mode) { + val = pch_get_backlight(connector, unused); + + drm_dbg_kms(&dev_priv->drm, + "CPU backlight register was enabled, switching to PCH override\n"); + + /* Write converted CPU PWM value to PCH override register */ + lpt_set_backlight(connector->base.state, val); + intel_de_write(dev_priv, BLC_PWM_PCH_CTL1, + pch_ctl1 | BLM_PCH_OVERRIDE_ENABLE); + + intel_de_write(dev_priv, BLC_PWM_CPU_CTL2, + cpu_ctl2 & ~BLM_PWM_ENABLE); + } + + return 0; +} + +static int pch_setup_backlight(struct intel_connector *connector, enum pipe unused) +{ + struct drm_i915_private *dev_priv = to_i915(connector->base.dev); + struct intel_panel *panel = &connector->panel; + u32 cpu_ctl2, pch_ctl1, pch_ctl2; + + pch_ctl1 = intel_de_read(dev_priv, BLC_PWM_PCH_CTL1); + panel->backlight.active_low_pwm = pch_ctl1 & BLM_PCH_POLARITY; + + pch_ctl2 = intel_de_read(dev_priv, BLC_PWM_PCH_CTL2); + panel->backlight.pwm_level_max = pch_ctl2 >> 16; + + if (!panel->backlight.pwm_level_max) + panel->backlight.pwm_level_max = get_backlight_max_vbt(connector); + + if (!panel->backlight.pwm_level_max) + return -ENODEV; + + panel->backlight.pwm_level_min = get_backlight_min_vbt(connector); + + cpu_ctl2 = intel_de_read(dev_priv, BLC_PWM_CPU_CTL2); + panel->backlight.pwm_enabled = (cpu_ctl2 & BLM_PWM_ENABLE) && + (pch_ctl1 & BLM_PCH_PWM_ENABLE); + + return 0; +} + +static int i9xx_setup_backlight(struct intel_connector *connector, enum pipe unused) +{ + struct drm_i915_private *dev_priv = to_i915(connector->base.dev); + struct intel_panel *panel = &connector->panel; + u32 ctl, val; + + ctl = intel_de_read(dev_priv, BLC_PWM_CTL); + + if (DISPLAY_VER(dev_priv) == 2 || IS_I915GM(dev_priv) || IS_I945GM(dev_priv)) + panel->backlight.combination_mode = ctl & BLM_LEGACY_MODE; + + if (IS_PINEVIEW(dev_priv)) + panel->backlight.active_low_pwm = ctl & BLM_POLARITY_PNV; + + panel->backlight.pwm_level_max = ctl >> 17; + + if (!panel->backlight.pwm_level_max) { + panel->backlight.pwm_level_max = get_backlight_max_vbt(connector); + panel->backlight.pwm_level_max >>= 1; + } + + if (!panel->backlight.pwm_level_max) + return -ENODEV; + + if (panel->backlight.combination_mode) + panel->backlight.pwm_level_max *= 0xff; + + panel->backlight.pwm_level_min = get_backlight_min_vbt(connector); + + val = i9xx_get_backlight(connector, unused); + val = intel_panel_invert_pwm_level(connector, val); + val = clamp(val, panel->backlight.pwm_level_min, panel->backlight.pwm_level_max); + + panel->backlight.pwm_enabled = val != 0; + + return 0; +} + +static int i965_setup_backlight(struct intel_connector *connector, enum pipe unused) +{ + struct drm_i915_private *dev_priv = to_i915(connector->base.dev); + struct intel_panel *panel = &connector->panel; + u32 ctl, ctl2; + + ctl2 = intel_de_read(dev_priv, BLC_PWM_CTL2); + panel->backlight.combination_mode = ctl2 & BLM_COMBINATION_MODE; + panel->backlight.active_low_pwm = ctl2 & BLM_POLARITY_I965; + + ctl = intel_de_read(dev_priv, BLC_PWM_CTL); + panel->backlight.pwm_level_max = ctl >> 16; + + if (!panel->backlight.pwm_level_max) + panel->backlight.pwm_level_max = get_backlight_max_vbt(connector); + + if (!panel->backlight.pwm_level_max) + return -ENODEV; + + if (panel->backlight.combination_mode) + panel->backlight.pwm_level_max *= 0xff; + + panel->backlight.pwm_level_min = get_backlight_min_vbt(connector); + + panel->backlight.pwm_enabled = ctl2 & BLM_PWM_ENABLE; + + return 0; +} + +static int vlv_setup_backlight(struct intel_connector *connector, enum pipe pipe) +{ + struct drm_i915_private *dev_priv = to_i915(connector->base.dev); + struct intel_panel *panel = &connector->panel; + u32 ctl, ctl2; + + if (drm_WARN_ON(&dev_priv->drm, pipe != PIPE_A && pipe != PIPE_B)) + return -ENODEV; + + ctl2 = intel_de_read(dev_priv, VLV_BLC_PWM_CTL2(pipe)); + panel->backlight.active_low_pwm = ctl2 & BLM_POLARITY_I965; + + ctl = intel_de_read(dev_priv, VLV_BLC_PWM_CTL(pipe)); + panel->backlight.pwm_level_max = ctl >> 16; + + if (!panel->backlight.pwm_level_max) + panel->backlight.pwm_level_max = get_backlight_max_vbt(connector); + + if (!panel->backlight.pwm_level_max) + return -ENODEV; + + panel->backlight.pwm_level_min = get_backlight_min_vbt(connector); + + panel->backlight.pwm_enabled = ctl2 & BLM_PWM_ENABLE; + + return 0; +} + +static int +bxt_setup_backlight(struct intel_connector *connector, enum pipe unused) +{ + struct drm_i915_private *dev_priv = to_i915(connector->base.dev); + struct intel_panel *panel = &connector->panel; + u32 pwm_ctl, val; + + panel->backlight.controller = dev_priv->vbt.backlight.controller; + + pwm_ctl = intel_de_read(dev_priv, + BXT_BLC_PWM_CTL(panel->backlight.controller)); + + /* Controller 1 uses the utility pin. */ + if (panel->backlight.controller == 1) { + val = intel_de_read(dev_priv, UTIL_PIN_CTL); + panel->backlight.util_pin_active_low = + val & UTIL_PIN_POLARITY; + } + + panel->backlight.active_low_pwm = pwm_ctl & BXT_BLC_PWM_POLARITY; + panel->backlight.pwm_level_max = + intel_de_read(dev_priv, BXT_BLC_PWM_FREQ(panel->backlight.controller)); + + if (!panel->backlight.pwm_level_max) + panel->backlight.pwm_level_max = get_backlight_max_vbt(connector); + + if (!panel->backlight.pwm_level_max) + return -ENODEV; + + panel->backlight.pwm_level_min = get_backlight_min_vbt(connector); + + panel->backlight.pwm_enabled = pwm_ctl & BXT_BLC_PWM_ENABLE; + + return 0; +} + +static int +cnp_setup_backlight(struct intel_connector *connector, enum pipe unused) +{ + struct drm_i915_private *dev_priv = to_i915(connector->base.dev); + struct intel_panel *panel = &connector->panel; + u32 pwm_ctl; + + /* + * CNP has the BXT implementation of backlight, but with only one + * controller. TODO: ICP has multiple controllers but we only use + * controller 0 for now. + */ + panel->backlight.controller = 0; + + pwm_ctl = intel_de_read(dev_priv, + BXT_BLC_PWM_CTL(panel->backlight.controller)); + + panel->backlight.active_low_pwm = pwm_ctl & BXT_BLC_PWM_POLARITY; + panel->backlight.pwm_level_max = + intel_de_read(dev_priv, BXT_BLC_PWM_FREQ(panel->backlight.controller)); + + if (!panel->backlight.pwm_level_max) + panel->backlight.pwm_level_max = get_backlight_max_vbt(connector); + + if (!panel->backlight.pwm_level_max) + return -ENODEV; + + panel->backlight.pwm_level_min = get_backlight_min_vbt(connector); + + panel->backlight.pwm_enabled = pwm_ctl & BXT_BLC_PWM_ENABLE; + + return 0; +} + +static int ext_pwm_setup_backlight(struct intel_connector *connector, + enum pipe pipe) +{ + struct drm_device *dev = connector->base.dev; + struct drm_i915_private *dev_priv = to_i915(dev); + struct intel_panel *panel = &connector->panel; + const char *desc; + u32 level; + + /* Get the right PWM chip for DSI backlight according to VBT */ + if (dev_priv->vbt.dsi.config->pwm_blc == PPS_BLC_PMIC) { + panel->backlight.pwm = pwm_get(dev->dev, "pwm_pmic_backlight"); + desc = "PMIC"; + } else { + panel->backlight.pwm = pwm_get(dev->dev, "pwm_soc_backlight"); + desc = "SoC"; + } + + if (IS_ERR(panel->backlight.pwm)) { + drm_err(&dev_priv->drm, "Failed to get the %s PWM chip\n", + desc); + panel->backlight.pwm = NULL; + return -ENODEV; + } + + panel->backlight.pwm_level_max = 100; /* 100% */ + panel->backlight.pwm_level_min = get_backlight_min_vbt(connector); + + if (pwm_is_enabled(panel->backlight.pwm)) { + /* PWM is already enabled, use existing settings */ + pwm_get_state(panel->backlight.pwm, &panel->backlight.pwm_state); + + level = pwm_get_relative_duty_cycle(&panel->backlight.pwm_state, + 100); + level = intel_panel_invert_pwm_level(connector, level); + panel->backlight.pwm_enabled = true; + + drm_dbg_kms(&dev_priv->drm, "PWM already enabled at freq %ld, VBT freq %d, level %d\n", + NSEC_PER_SEC / (unsigned long)panel->backlight.pwm_state.period, + get_vbt_pwm_freq(dev_priv), level); + } else { + /* Set period from VBT frequency, leave other settings at 0. */ + panel->backlight.pwm_state.period = + NSEC_PER_SEC / get_vbt_pwm_freq(dev_priv); + } + + drm_info(&dev_priv->drm, "Using %s PWM for LCD backlight control\n", + desc); + return 0; +} + +static void intel_pwm_set_backlight(const struct drm_connector_state *conn_state, u32 level) +{ + struct intel_connector *connector = to_intel_connector(conn_state->connector); + struct intel_panel *panel = &connector->panel; + + panel->backlight.pwm_funcs->set(conn_state, + intel_panel_invert_pwm_level(connector, level)); +} + +static u32 intel_pwm_get_backlight(struct intel_connector *connector, enum pipe pipe) +{ + struct intel_panel *panel = &connector->panel; + + return intel_panel_invert_pwm_level(connector, + panel->backlight.pwm_funcs->get(connector, pipe)); +} + +static void intel_pwm_enable_backlight(const struct intel_crtc_state *crtc_state, + const struct drm_connector_state *conn_state, u32 level) +{ + struct intel_connector *connector = to_intel_connector(conn_state->connector); + struct intel_panel *panel = &connector->panel; + + panel->backlight.pwm_funcs->enable(crtc_state, conn_state, + intel_panel_invert_pwm_level(connector, level)); +} + +static void intel_pwm_disable_backlight(const struct drm_connector_state *conn_state, u32 level) +{ + struct intel_connector *connector = to_intel_connector(conn_state->connector); + struct intel_panel *panel = &connector->panel; + + panel->backlight.pwm_funcs->disable(conn_state, + intel_panel_invert_pwm_level(connector, level)); +} + +static int intel_pwm_setup_backlight(struct intel_connector *connector, enum pipe pipe) +{ + struct intel_panel *panel = &connector->panel; + int ret = panel->backlight.pwm_funcs->setup(connector, pipe); + + if (ret < 0) + return ret; + + panel->backlight.min = panel->backlight.pwm_level_min; + panel->backlight.max = panel->backlight.pwm_level_max; + panel->backlight.level = intel_pwm_get_backlight(connector, pipe); + panel->backlight.enabled = panel->backlight.pwm_enabled; + + return 0; +} + +void intel_panel_update_backlight(struct intel_atomic_state *state, + struct intel_encoder *encoder, + const struct intel_crtc_state *crtc_state, + const struct drm_connector_state *conn_state) +{ + struct intel_connector *connector = to_intel_connector(conn_state->connector); + struct drm_i915_private *dev_priv = to_i915(connector->base.dev); + struct intel_panel *panel = &connector->panel; + + if (!panel->backlight.present) + return; + + mutex_lock(&dev_priv->backlight_lock); + if (!panel->backlight.enabled) + __intel_panel_enable_backlight(crtc_state, conn_state); + + mutex_unlock(&dev_priv->backlight_lock); +} + +int intel_panel_setup_backlight(struct drm_connector *connector, enum pipe pipe) +{ + struct drm_i915_private *dev_priv = to_i915(connector->dev); + struct intel_connector *intel_connector = to_intel_connector(connector); + struct intel_panel *panel = &intel_connector->panel; + int ret; + + if (!dev_priv->vbt.backlight.present) { + if (dev_priv->quirks & QUIRK_BACKLIGHT_PRESENT) { + drm_dbg_kms(&dev_priv->drm, + "no backlight present per VBT, but present per quirk\n"); + } else { + drm_dbg_kms(&dev_priv->drm, + "no backlight present per VBT\n"); + return 0; + } + } + + /* ensure intel_panel has been initialized first */ + if (drm_WARN_ON(&dev_priv->drm, !panel->backlight.funcs)) + return -ENODEV; + + /* set level and max in panel struct */ + mutex_lock(&dev_priv->backlight_lock); + ret = panel->backlight.funcs->setup(intel_connector, pipe); + mutex_unlock(&dev_priv->backlight_lock); + + if (ret) { + drm_dbg_kms(&dev_priv->drm, + "failed to setup backlight for connector %s\n", + connector->name); + return ret; + } + + panel->backlight.present = true; + + drm_dbg_kms(&dev_priv->drm, + "Connector %s backlight initialized, %s, brightness %u/%u\n", + connector->name, + enableddisabled(panel->backlight.enabled), + panel->backlight.level, panel->backlight.max); + + return 0; +} + +void intel_panel_destroy_backlight(struct intel_panel *panel) +{ + /* dispose of the pwm */ + if (panel->backlight.pwm) + pwm_put(panel->backlight.pwm); + + panel->backlight.present = false; +} + +static const struct intel_panel_bl_funcs bxt_pwm_funcs = { + .setup = bxt_setup_backlight, + .enable = bxt_enable_backlight, + .disable = bxt_disable_backlight, + .set = bxt_set_backlight, + .get = bxt_get_backlight, + .hz_to_pwm = bxt_hz_to_pwm, +}; + +static const struct intel_panel_bl_funcs cnp_pwm_funcs = { + .setup = cnp_setup_backlight, + .enable = cnp_enable_backlight, + .disable = cnp_disable_backlight, + .set = bxt_set_backlight, + .get = bxt_get_backlight, + .hz_to_pwm = cnp_hz_to_pwm, +}; + +static const struct intel_panel_bl_funcs lpt_pwm_funcs = { + .setup = lpt_setup_backlight, + .enable = lpt_enable_backlight, + .disable = lpt_disable_backlight, + .set = lpt_set_backlight, + .get = lpt_get_backlight, + .hz_to_pwm = lpt_hz_to_pwm, +}; + +static const struct intel_panel_bl_funcs spt_pwm_funcs = { + .setup = lpt_setup_backlight, + .enable = lpt_enable_backlight, + .disable = lpt_disable_backlight, + .set = lpt_set_backlight, + .get = lpt_get_backlight, + .hz_to_pwm = spt_hz_to_pwm, +}; + +static const struct intel_panel_bl_funcs pch_pwm_funcs = { + .setup = pch_setup_backlight, + .enable = pch_enable_backlight, + .disable = pch_disable_backlight, + .set = pch_set_backlight, + .get = pch_get_backlight, + .hz_to_pwm = pch_hz_to_pwm, +}; + +static const struct intel_panel_bl_funcs ext_pwm_funcs = { + .setup = ext_pwm_setup_backlight, + .enable = ext_pwm_enable_backlight, + .disable = ext_pwm_disable_backlight, + .set = ext_pwm_set_backlight, + .get = ext_pwm_get_backlight, +}; + +static const struct intel_panel_bl_funcs vlv_pwm_funcs = { + .setup = vlv_setup_backlight, + .enable = vlv_enable_backlight, + .disable = vlv_disable_backlight, + .set = vlv_set_backlight, + .get = vlv_get_backlight, + .hz_to_pwm = vlv_hz_to_pwm, +}; + +static const struct intel_panel_bl_funcs i965_pwm_funcs = { + .setup = i965_setup_backlight, + .enable = i965_enable_backlight, + .disable = i965_disable_backlight, + .set = i9xx_set_backlight, + .get = i9xx_get_backlight, + .hz_to_pwm = i965_hz_to_pwm, +}; + +static const struct intel_panel_bl_funcs i9xx_pwm_funcs = { + .setup = i9xx_setup_backlight, + .enable = i9xx_enable_backlight, + .disable = i9xx_disable_backlight, + .set = i9xx_set_backlight, + .get = i9xx_get_backlight, + .hz_to_pwm = i9xx_hz_to_pwm, +}; + +static const struct intel_panel_bl_funcs pwm_bl_funcs = { + .setup = intel_pwm_setup_backlight, + .enable = intel_pwm_enable_backlight, + .disable = intel_pwm_disable_backlight, + .set = intel_pwm_set_backlight, + .get = intel_pwm_get_backlight, +}; + +/* Set up chip specific backlight functions */ +void +intel_panel_init_backlight_funcs(struct intel_panel *panel) +{ + struct intel_connector *connector = + container_of(panel, struct intel_connector, panel); + struct drm_i915_private *dev_priv = to_i915(connector->base.dev); + + if (connector->base.connector_type == DRM_MODE_CONNECTOR_DSI && + intel_dsi_dcs_init_backlight_funcs(connector) == 0) + return; + + if (IS_GEMINILAKE(dev_priv) || IS_BROXTON(dev_priv)) { + panel->backlight.pwm_funcs = &bxt_pwm_funcs; + } else if (INTEL_PCH_TYPE(dev_priv) >= PCH_CNP) { + panel->backlight.pwm_funcs = &cnp_pwm_funcs; + } else if (INTEL_PCH_TYPE(dev_priv) >= PCH_LPT) { + if (HAS_PCH_LPT(dev_priv)) + panel->backlight.pwm_funcs = &lpt_pwm_funcs; + else + panel->backlight.pwm_funcs = &spt_pwm_funcs; + } else if (HAS_PCH_SPLIT(dev_priv)) { + panel->backlight.pwm_funcs = &pch_pwm_funcs; + } else if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) { + if (connector->base.connector_type == DRM_MODE_CONNECTOR_DSI) { + panel->backlight.pwm_funcs = &ext_pwm_funcs; + } else { + panel->backlight.pwm_funcs = &vlv_pwm_funcs; + } + } else if (DISPLAY_VER(dev_priv) == 4) { + panel->backlight.pwm_funcs = &i965_pwm_funcs; + } else { + panel->backlight.pwm_funcs = &i9xx_pwm_funcs; + } + + if (connector->base.connector_type == DRM_MODE_CONNECTOR_eDP && + intel_dp_aux_init_backlight_funcs(connector) == 0) + return; + + /* We're using a standard PWM backlight interface */ + panel->backlight.funcs = &pwm_bl_funcs; +} diff --git a/drivers/gpu/drm/i915/display/intel_backlight.h b/drivers/gpu/drm/i915/display/intel_backlight.h new file mode 100644 index 0000000000000..282020cb47d5b --- /dev/null +++ b/drivers/gpu/drm/i915/display/intel_backlight.h @@ -0,0 +1,51 @@ +/* SPDX-License-Identifier: MIT */ +/* + * Copyright © 2021 Intel Corporation + */ + +#ifndef __INTEL_BACKLIGHT_H__ +#define __INTEL_BACKLIGHT_H__ + +#include <linux/types.h> + +struct drm_connector; +struct drm_connector_state; +struct intel_atomic_state; +struct intel_connector; +struct intel_crtc_state; +struct intel_encoder; +struct intel_panel; +enum pipe; + +void intel_panel_init_backlight_funcs(struct intel_panel *panel); +void intel_panel_destroy_backlight(struct intel_panel *panel); +void intel_panel_set_backlight_acpi(const struct drm_connector_state *conn_state, + u32 level, u32 max); +int intel_panel_setup_backlight(struct drm_connector *connector, + enum pipe pipe); +void intel_panel_enable_backlight(const struct intel_crtc_state *crtc_state, + const struct drm_connector_state *conn_state); +void intel_panel_update_backlight(struct intel_atomic_state *state, + struct intel_encoder *encoder, + const struct intel_crtc_state *crtc_state, + const struct drm_connector_state *conn_state); +void intel_panel_disable_backlight(const struct drm_connector_state *old_conn_state); +void intel_panel_set_pwm_level(const struct drm_connector_state *conn_state, u32 level); +u32 intel_panel_invert_pwm_level(struct intel_connector *connector, u32 level); +u32 intel_panel_backlight_level_to_pwm(struct intel_connector *connector, u32 level); +u32 intel_panel_backlight_level_from_pwm(struct intel_connector *connector, u32 val); + +#if IS_ENABLED(CONFIG_BACKLIGHT_CLASS_DEVICE) +int intel_backlight_device_register(struct intel_connector *connector); +void intel_backlight_device_unregister(struct intel_connector *connector); +#else /* CONFIG_BACKLIGHT_CLASS_DEVICE */ +static inline int intel_backlight_device_register(struct intel_connector *connector) +{ + return 0; +} +static inline void intel_backlight_device_unregister(struct intel_connector *connector) +{ +} +#endif /* CONFIG_BACKLIGHT_CLASS_DEVICE */ + +#endif /* __INTEL_BACKLIGHT_H__ */ diff --git a/drivers/gpu/drm/i915/display/intel_connector.c b/drivers/gpu/drm/i915/display/intel_connector.c index 9bed1ccecea0d..4f49d782eca23 100644 --- a/drivers/gpu/drm/i915/display/intel_connector.c +++ b/drivers/gpu/drm/i915/display/intel_connector.c @@ -29,13 +29,13 @@ #include <drm/drm_atomic_helper.h> #include <drm/drm_edid.h> -#include "display/intel_panel.h" - #include "i915_drv.h" +#include "intel_backlight.h" #include "intel_connector.h" #include "intel_display_debugfs.h" #include "intel_display_types.h" #include "intel_hdcp.h" +#include "intel_panel.h" int intel_connector_init(struct intel_connector *connector) { diff --git a/drivers/gpu/drm/i915/display/intel_ddi.c b/drivers/gpu/drm/i915/display/intel_ddi.c index f61901e26409e..68489c7298302 100644 --- a/drivers/gpu/drm/i915/display/intel_ddi.c +++ b/drivers/gpu/drm/i915/display/intel_ddi.c @@ -29,6 +29,7 @@ #include "i915_drv.h" #include "intel_audio.h" +#include "intel_backlight.h" #include "intel_combo_phy.h" #include "intel_connector.h" #include "intel_crtc.h" @@ -49,7 +50,6 @@ #include "intel_hdmi.h" #include "intel_hotplug.h" #include "intel_lspcon.h" -#include "intel_panel.h" #include "intel_pps.h" #include "intel_psr.h" #include "intel_snps_phy.h" diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c index 631cf7d4323c8..f87e4d510ea5e 100644 --- a/drivers/gpu/drm/i915/display/intel_dp.c +++ b/drivers/gpu/drm/i915/display/intel_dp.c @@ -45,6 +45,7 @@ #include "i915_drv.h" #include "intel_atomic.h" #include "intel_audio.h" +#include "intel_backlight.h" #include "intel_connector.h" #include "intel_ddi.h" #include "intel_de.h" diff --git a/drivers/gpu/drm/i915/display/intel_dp_aux_backlight.c b/drivers/gpu/drm/i915/display/intel_dp_aux_backlight.c index e7b90863aa43d..0a77f0e48aa11 100644 --- a/drivers/gpu/drm/i915/display/intel_dp_aux_backlight.c +++ b/drivers/gpu/drm/i915/display/intel_dp_aux_backlight.c @@ -34,10 +34,10 @@ * for some reason. */ +#include "intel_backlight.h" #include "intel_display_types.h" #include "intel_dp.h" #include "intel_dp_aux_backlight.h" -#include "intel_panel.h" /* TODO: * Implement HDR, right now we just implement the bare minimum to bring us back into SDR mode so we diff --git a/drivers/gpu/drm/i915/display/intel_lvds.c b/drivers/gpu/drm/i915/display/intel_lvds.c index e0381b0fce914..8f5741ebd58dd 100644 --- a/drivers/gpu/drm/i915/display/intel_lvds.c +++ b/drivers/gpu/drm/i915/display/intel_lvds.c @@ -40,6 +40,7 @@ #include "i915_drv.h" #include "intel_atomic.h" +#include "intel_backlight.h" #include "intel_connector.h" #include "intel_de.h" #include "intel_display_types.h" diff --git a/drivers/gpu/drm/i915/display/intel_opregion.c b/drivers/gpu/drm/i915/display/intel_opregion.c index f7f49b69830fa..aad5c1cd3898e 100644 --- a/drivers/gpu/drm/i915/display/intel_opregion.c +++ b/drivers/gpu/drm/i915/display/intel_opregion.c @@ -30,10 +30,9 @@ #include <linux/firmware.h> #include <acpi/video.h> -#include "display/intel_panel.h" - #include "i915_drv.h" #include "intel_acpi.h" +#include "intel_backlight.h" #include "intel_display_types.h" #include "intel_opregion.h" diff --git a/drivers/gpu/drm/i915/display/intel_panel.c b/drivers/gpu/drm/i915/display/intel_panel.c index 7d7a60b4d2de7..ad54767440c15 100644 --- a/drivers/gpu/drm/i915/display/intel_panel.c +++ b/drivers/gpu/drm/i915/display/intel_panel.c @@ -28,17 +28,13 @@ * Chris Wilson <chris@xxxxxxxxxxxxxxxxxx> */ -#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt - #include <linux/kernel.h> -#include <linux/moduleparam.h> #include <linux/pwm.h> +#include "intel_backlight.h" #include "intel_connector.h" #include "intel_de.h" #include "intel_display_types.h" -#include "intel_dp_aux_backlight.h" -#include "intel_dsi_dcs_backlight.h" #include "intel_panel.h" void @@ -456,1767 +452,6 @@ int intel_gmch_panel_fitting(struct intel_crtc_state *crtc_state, return 0; } -/** - * scale - scale values from one range to another - * @source_val: value in range [@source_min..@source_max] - * @source_min: minimum legal value for @source_val - * @source_max: maximum legal value for @source_val - * @target_min: corresponding target value for @source_min - * @target_max: corresponding target value for @source_max - * - * Return @source_val in range [@source_min..@source_max] scaled to range - * [@target_min..@target_max]. - */ -static u32 scale(u32 source_val, - u32 source_min, u32 source_max, - u32 target_min, u32 target_max) -{ - u64 target_val; - - WARN_ON(source_min > source_max); - WARN_ON(target_min > target_max); - - /* defensive */ - source_val = clamp(source_val, source_min, source_max); - - /* avoid overflows */ - target_val = mul_u32_u32(source_val - source_min, - target_max - target_min); - target_val = DIV_ROUND_CLOSEST_ULL(target_val, source_max - source_min); - target_val += target_min; - - return target_val; -} - -/* Scale user_level in range [0..user_max] to [0..hw_max], clamping the result - * to [hw_min..hw_max]. */ -static u32 clamp_user_to_hw(struct intel_connector *connector, - u32 user_level, u32 user_max) -{ - struct intel_panel *panel = &connector->panel; - u32 hw_level; - - hw_level = scale(user_level, 0, user_max, 0, panel->backlight.max); - hw_level = clamp(hw_level, panel->backlight.min, panel->backlight.max); - - return hw_level; -} - -/* Scale hw_level in range [hw_min..hw_max] to [0..user_max]. */ -static u32 scale_hw_to_user(struct intel_connector *connector, - u32 hw_level, u32 user_max) -{ - struct intel_panel *panel = &connector->panel; - - return scale(hw_level, panel->backlight.min, panel->backlight.max, - 0, user_max); -} - -u32 intel_panel_invert_pwm_level(struct intel_connector *connector, u32 val) -{ - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - struct intel_panel *panel = &connector->panel; - - drm_WARN_ON(&dev_priv->drm, panel->backlight.pwm_level_max == 0); - - if (dev_priv->params.invert_brightness < 0) - return val; - - if (dev_priv->params.invert_brightness > 0 || - dev_priv->quirks & QUIRK_INVERT_BRIGHTNESS) { - return panel->backlight.pwm_level_max - val + panel->backlight.pwm_level_min; - } - - return val; -} - -void intel_panel_set_pwm_level(const struct drm_connector_state *conn_state, u32 val) -{ - struct intel_connector *connector = to_intel_connector(conn_state->connector); - struct drm_i915_private *i915 = to_i915(connector->base.dev); - struct intel_panel *panel = &connector->panel; - - drm_dbg_kms(&i915->drm, "set backlight PWM = %d\n", val); - panel->backlight.pwm_funcs->set(conn_state, val); -} - -u32 intel_panel_backlight_level_to_pwm(struct intel_connector *connector, u32 val) -{ - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - struct intel_panel *panel = &connector->panel; - - drm_WARN_ON_ONCE(&dev_priv->drm, - panel->backlight.max == 0 || panel->backlight.pwm_level_max == 0); - - val = scale(val, panel->backlight.min, panel->backlight.max, - panel->backlight.pwm_level_min, panel->backlight.pwm_level_max); - - return intel_panel_invert_pwm_level(connector, val); -} - -u32 intel_panel_backlight_level_from_pwm(struct intel_connector *connector, u32 val) -{ - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - struct intel_panel *panel = &connector->panel; - - drm_WARN_ON_ONCE(&dev_priv->drm, - panel->backlight.max == 0 || panel->backlight.pwm_level_max == 0); - - if (dev_priv->params.invert_brightness > 0 || - (dev_priv->params.invert_brightness == 0 && dev_priv->quirks & QUIRK_INVERT_BRIGHTNESS)) - val = panel->backlight.pwm_level_max - (val - panel->backlight.pwm_level_min); - - return scale(val, panel->backlight.pwm_level_min, panel->backlight.pwm_level_max, - panel->backlight.min, panel->backlight.max); -} - -static u32 lpt_get_backlight(struct intel_connector *connector, enum pipe unused) -{ - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - - return intel_de_read(dev_priv, BLC_PWM_PCH_CTL2) & BACKLIGHT_DUTY_CYCLE_MASK; -} - -static u32 pch_get_backlight(struct intel_connector *connector, enum pipe unused) -{ - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - - return intel_de_read(dev_priv, BLC_PWM_CPU_CTL) & BACKLIGHT_DUTY_CYCLE_MASK; -} - -static u32 i9xx_get_backlight(struct intel_connector *connector, enum pipe unused) -{ - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - struct intel_panel *panel = &connector->panel; - u32 val; - - val = intel_de_read(dev_priv, BLC_PWM_CTL) & BACKLIGHT_DUTY_CYCLE_MASK; - if (DISPLAY_VER(dev_priv) < 4) - val >>= 1; - - if (panel->backlight.combination_mode) { - u8 lbpc; - - pci_read_config_byte(to_pci_dev(dev_priv->drm.dev), LBPC, &lbpc); - val *= lbpc; - } - - return val; -} - -static u32 vlv_get_backlight(struct intel_connector *connector, enum pipe pipe) -{ - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - - if (drm_WARN_ON(&dev_priv->drm, pipe != PIPE_A && pipe != PIPE_B)) - return 0; - - return intel_de_read(dev_priv, VLV_BLC_PWM_CTL(pipe)) & BACKLIGHT_DUTY_CYCLE_MASK; -} - -static u32 bxt_get_backlight(struct intel_connector *connector, enum pipe unused) -{ - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - struct intel_panel *panel = &connector->panel; - - return intel_de_read(dev_priv, - BXT_BLC_PWM_DUTY(panel->backlight.controller)); -} - -static u32 ext_pwm_get_backlight(struct intel_connector *connector, enum pipe unused) -{ - struct intel_panel *panel = &connector->panel; - struct pwm_state state; - - pwm_get_state(panel->backlight.pwm, &state); - return pwm_get_relative_duty_cycle(&state, 100); -} - -static void lpt_set_backlight(const struct drm_connector_state *conn_state, u32 level) -{ - struct intel_connector *connector = to_intel_connector(conn_state->connector); - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - - u32 val = intel_de_read(dev_priv, BLC_PWM_PCH_CTL2) & ~BACKLIGHT_DUTY_CYCLE_MASK; - intel_de_write(dev_priv, BLC_PWM_PCH_CTL2, val | level); -} - -static void pch_set_backlight(const struct drm_connector_state *conn_state, u32 level) -{ - struct intel_connector *connector = to_intel_connector(conn_state->connector); - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - u32 tmp; - - tmp = intel_de_read(dev_priv, BLC_PWM_CPU_CTL) & ~BACKLIGHT_DUTY_CYCLE_MASK; - intel_de_write(dev_priv, BLC_PWM_CPU_CTL, tmp | level); -} - -static void i9xx_set_backlight(const struct drm_connector_state *conn_state, u32 level) -{ - struct intel_connector *connector = to_intel_connector(conn_state->connector); - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - struct intel_panel *panel = &connector->panel; - u32 tmp, mask; - - drm_WARN_ON(&dev_priv->drm, panel->backlight.pwm_level_max == 0); - - if (panel->backlight.combination_mode) { - u8 lbpc; - - lbpc = level * 0xfe / panel->backlight.pwm_level_max + 1; - level /= lbpc; - pci_write_config_byte(to_pci_dev(dev_priv->drm.dev), LBPC, lbpc); - } - - if (DISPLAY_VER(dev_priv) == 4) { - mask = BACKLIGHT_DUTY_CYCLE_MASK; - } else { - level <<= 1; - mask = BACKLIGHT_DUTY_CYCLE_MASK_PNV; - } - - tmp = intel_de_read(dev_priv, BLC_PWM_CTL) & ~mask; - intel_de_write(dev_priv, BLC_PWM_CTL, tmp | level); -} - -static void vlv_set_backlight(const struct drm_connector_state *conn_state, u32 level) -{ - struct intel_connector *connector = to_intel_connector(conn_state->connector); - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - enum pipe pipe = to_intel_crtc(conn_state->crtc)->pipe; - u32 tmp; - - tmp = intel_de_read(dev_priv, VLV_BLC_PWM_CTL(pipe)) & ~BACKLIGHT_DUTY_CYCLE_MASK; - intel_de_write(dev_priv, VLV_BLC_PWM_CTL(pipe), tmp | level); -} - -static void bxt_set_backlight(const struct drm_connector_state *conn_state, u32 level) -{ - struct intel_connector *connector = to_intel_connector(conn_state->connector); - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - struct intel_panel *panel = &connector->panel; - - intel_de_write(dev_priv, - BXT_BLC_PWM_DUTY(panel->backlight.controller), level); -} - -static void ext_pwm_set_backlight(const struct drm_connector_state *conn_state, u32 level) -{ - struct intel_panel *panel = &to_intel_connector(conn_state->connector)->panel; - - pwm_set_relative_duty_cycle(&panel->backlight.pwm_state, level, 100); - pwm_apply_state(panel->backlight.pwm, &panel->backlight.pwm_state); -} - -static void -intel_panel_actually_set_backlight(const struct drm_connector_state *conn_state, u32 level) -{ - struct intel_connector *connector = to_intel_connector(conn_state->connector); - struct drm_i915_private *i915 = to_i915(connector->base.dev); - struct intel_panel *panel = &connector->panel; - - drm_dbg_kms(&i915->drm, "set backlight level = %d\n", level); - - panel->backlight.funcs->set(conn_state, level); -} - -/* set backlight brightness to level in range [0..max], assuming hw min is - * respected. - */ -void intel_panel_set_backlight_acpi(const struct drm_connector_state *conn_state, - u32 user_level, u32 user_max) -{ - struct intel_connector *connector = to_intel_connector(conn_state->connector); - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - struct intel_panel *panel = &connector->panel; - u32 hw_level; - - /* - * Lack of crtc may occur during driver init because - * connection_mutex isn't held across the entire backlight - * setup + modeset readout, and the BIOS can issue the - * requests at any time. - */ - if (!panel->backlight.present || !conn_state->crtc) - return; - - mutex_lock(&dev_priv->backlight_lock); - - drm_WARN_ON(&dev_priv->drm, panel->backlight.max == 0); - - hw_level = clamp_user_to_hw(connector, user_level, user_max); - panel->backlight.level = hw_level; - - if (panel->backlight.device) - panel->backlight.device->props.brightness = - scale_hw_to_user(connector, - panel->backlight.level, - panel->backlight.device->props.max_brightness); - - if (panel->backlight.enabled) - intel_panel_actually_set_backlight(conn_state, hw_level); - - mutex_unlock(&dev_priv->backlight_lock); -} - -static void lpt_disable_backlight(const struct drm_connector_state *old_conn_state, u32 level) -{ - struct intel_connector *connector = to_intel_connector(old_conn_state->connector); - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - u32 tmp; - - intel_panel_set_pwm_level(old_conn_state, level); - - /* - * Although we don't support or enable CPU PWM with LPT/SPT based - * systems, it may have been enabled prior to loading the - * driver. Disable to avoid warnings on LCPLL disable. - * - * This needs rework if we need to add support for CPU PWM on PCH split - * platforms. - */ - tmp = intel_de_read(dev_priv, BLC_PWM_CPU_CTL2); - if (tmp & BLM_PWM_ENABLE) { - drm_dbg_kms(&dev_priv->drm, - "cpu backlight was enabled, disabling\n"); - intel_de_write(dev_priv, BLC_PWM_CPU_CTL2, - tmp & ~BLM_PWM_ENABLE); - } - - tmp = intel_de_read(dev_priv, BLC_PWM_PCH_CTL1); - intel_de_write(dev_priv, BLC_PWM_PCH_CTL1, tmp & ~BLM_PCH_PWM_ENABLE); -} - -static void pch_disable_backlight(const struct drm_connector_state *old_conn_state, u32 val) -{ - struct intel_connector *connector = to_intel_connector(old_conn_state->connector); - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - u32 tmp; - - intel_panel_set_pwm_level(old_conn_state, val); - - tmp = intel_de_read(dev_priv, BLC_PWM_CPU_CTL2); - intel_de_write(dev_priv, BLC_PWM_CPU_CTL2, tmp & ~BLM_PWM_ENABLE); - - tmp = intel_de_read(dev_priv, BLC_PWM_PCH_CTL1); - intel_de_write(dev_priv, BLC_PWM_PCH_CTL1, tmp & ~BLM_PCH_PWM_ENABLE); -} - -static void i9xx_disable_backlight(const struct drm_connector_state *old_conn_state, u32 val) -{ - intel_panel_set_pwm_level(old_conn_state, val); -} - -static void i965_disable_backlight(const struct drm_connector_state *old_conn_state, u32 val) -{ - struct drm_i915_private *dev_priv = to_i915(old_conn_state->connector->dev); - u32 tmp; - - intel_panel_set_pwm_level(old_conn_state, val); - - tmp = intel_de_read(dev_priv, BLC_PWM_CTL2); - intel_de_write(dev_priv, BLC_PWM_CTL2, tmp & ~BLM_PWM_ENABLE); -} - -static void vlv_disable_backlight(const struct drm_connector_state *old_conn_state, u32 val) -{ - struct intel_connector *connector = to_intel_connector(old_conn_state->connector); - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - enum pipe pipe = to_intel_crtc(old_conn_state->crtc)->pipe; - u32 tmp; - - intel_panel_set_pwm_level(old_conn_state, val); - - tmp = intel_de_read(dev_priv, VLV_BLC_PWM_CTL2(pipe)); - intel_de_write(dev_priv, VLV_BLC_PWM_CTL2(pipe), - tmp & ~BLM_PWM_ENABLE); -} - -static void bxt_disable_backlight(const struct drm_connector_state *old_conn_state, u32 val) -{ - struct intel_connector *connector = to_intel_connector(old_conn_state->connector); - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - struct intel_panel *panel = &connector->panel; - u32 tmp; - - intel_panel_set_pwm_level(old_conn_state, val); - - tmp = intel_de_read(dev_priv, - BXT_BLC_PWM_CTL(panel->backlight.controller)); - intel_de_write(dev_priv, BXT_BLC_PWM_CTL(panel->backlight.controller), - tmp & ~BXT_BLC_PWM_ENABLE); - - if (panel->backlight.controller == 1) { - val = intel_de_read(dev_priv, UTIL_PIN_CTL); - val &= ~UTIL_PIN_ENABLE; - intel_de_write(dev_priv, UTIL_PIN_CTL, val); - } -} - -static void cnp_disable_backlight(const struct drm_connector_state *old_conn_state, u32 val) -{ - struct intel_connector *connector = to_intel_connector(old_conn_state->connector); - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - struct intel_panel *panel = &connector->panel; - u32 tmp; - - intel_panel_set_pwm_level(old_conn_state, val); - - tmp = intel_de_read(dev_priv, - BXT_BLC_PWM_CTL(panel->backlight.controller)); - intel_de_write(dev_priv, BXT_BLC_PWM_CTL(panel->backlight.controller), - tmp & ~BXT_BLC_PWM_ENABLE); -} - -static void ext_pwm_disable_backlight(const struct drm_connector_state *old_conn_state, u32 level) -{ - struct intel_connector *connector = to_intel_connector(old_conn_state->connector); - struct intel_panel *panel = &connector->panel; - - panel->backlight.pwm_state.enabled = false; - pwm_apply_state(panel->backlight.pwm, &panel->backlight.pwm_state); -} - -void intel_panel_disable_backlight(const struct drm_connector_state *old_conn_state) -{ - struct intel_connector *connector = to_intel_connector(old_conn_state->connector); - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - struct intel_panel *panel = &connector->panel; - - if (!panel->backlight.present) - return; - - /* - * Do not disable backlight on the vga_switcheroo path. When switching - * away from i915, the other client may depend on i915 to handle the - * backlight. This will leave the backlight on unnecessarily when - * another client is not activated. - */ - if (dev_priv->drm.switch_power_state == DRM_SWITCH_POWER_CHANGING) { - drm_dbg_kms(&dev_priv->drm, - "Skipping backlight disable on vga switch\n"); - return; - } - - mutex_lock(&dev_priv->backlight_lock); - - if (panel->backlight.device) - panel->backlight.device->props.power = FB_BLANK_POWERDOWN; - panel->backlight.enabled = false; - panel->backlight.funcs->disable(old_conn_state, 0); - - mutex_unlock(&dev_priv->backlight_lock); -} - -static void lpt_enable_backlight(const struct intel_crtc_state *crtc_state, - const struct drm_connector_state *conn_state, u32 level) -{ - struct intel_connector *connector = to_intel_connector(conn_state->connector); - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - struct intel_panel *panel = &connector->panel; - u32 pch_ctl1, pch_ctl2, schicken; - - pch_ctl1 = intel_de_read(dev_priv, BLC_PWM_PCH_CTL1); - if (pch_ctl1 & BLM_PCH_PWM_ENABLE) { - drm_dbg_kms(&dev_priv->drm, "pch backlight already enabled\n"); - pch_ctl1 &= ~BLM_PCH_PWM_ENABLE; - intel_de_write(dev_priv, BLC_PWM_PCH_CTL1, pch_ctl1); - } - - if (HAS_PCH_LPT(dev_priv)) { - schicken = intel_de_read(dev_priv, SOUTH_CHICKEN2); - if (panel->backlight.alternate_pwm_increment) - schicken |= LPT_PWM_GRANULARITY; - else - schicken &= ~LPT_PWM_GRANULARITY; - intel_de_write(dev_priv, SOUTH_CHICKEN2, schicken); - } else { - schicken = intel_de_read(dev_priv, SOUTH_CHICKEN1); - if (panel->backlight.alternate_pwm_increment) - schicken |= SPT_PWM_GRANULARITY; - else - schicken &= ~SPT_PWM_GRANULARITY; - intel_de_write(dev_priv, SOUTH_CHICKEN1, schicken); - } - - pch_ctl2 = panel->backlight.pwm_level_max << 16; - intel_de_write(dev_priv, BLC_PWM_PCH_CTL2, pch_ctl2); - - pch_ctl1 = 0; - if (panel->backlight.active_low_pwm) - pch_ctl1 |= BLM_PCH_POLARITY; - - /* After LPT, override is the default. */ - if (HAS_PCH_LPT(dev_priv)) - pch_ctl1 |= BLM_PCH_OVERRIDE_ENABLE; - - intel_de_write(dev_priv, BLC_PWM_PCH_CTL1, pch_ctl1); - intel_de_posting_read(dev_priv, BLC_PWM_PCH_CTL1); - intel_de_write(dev_priv, BLC_PWM_PCH_CTL1, - pch_ctl1 | BLM_PCH_PWM_ENABLE); - - /* This won't stick until the above enable. */ - intel_panel_set_pwm_level(conn_state, level); -} - -static void pch_enable_backlight(const struct intel_crtc_state *crtc_state, - const struct drm_connector_state *conn_state, u32 level) -{ - struct intel_connector *connector = to_intel_connector(conn_state->connector); - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - struct intel_panel *panel = &connector->panel; - enum transcoder cpu_transcoder = crtc_state->cpu_transcoder; - u32 cpu_ctl2, pch_ctl1, pch_ctl2; - - cpu_ctl2 = intel_de_read(dev_priv, BLC_PWM_CPU_CTL2); - if (cpu_ctl2 & BLM_PWM_ENABLE) { - drm_dbg_kms(&dev_priv->drm, "cpu backlight already enabled\n"); - cpu_ctl2 &= ~BLM_PWM_ENABLE; - intel_de_write(dev_priv, BLC_PWM_CPU_CTL2, cpu_ctl2); - } - - pch_ctl1 = intel_de_read(dev_priv, BLC_PWM_PCH_CTL1); - if (pch_ctl1 & BLM_PCH_PWM_ENABLE) { - drm_dbg_kms(&dev_priv->drm, "pch backlight already enabled\n"); - pch_ctl1 &= ~BLM_PCH_PWM_ENABLE; - intel_de_write(dev_priv, BLC_PWM_PCH_CTL1, pch_ctl1); - } - - if (cpu_transcoder == TRANSCODER_EDP) - cpu_ctl2 = BLM_TRANSCODER_EDP; - else - cpu_ctl2 = BLM_PIPE(cpu_transcoder); - intel_de_write(dev_priv, BLC_PWM_CPU_CTL2, cpu_ctl2); - intel_de_posting_read(dev_priv, BLC_PWM_CPU_CTL2); - intel_de_write(dev_priv, BLC_PWM_CPU_CTL2, cpu_ctl2 | BLM_PWM_ENABLE); - - /* This won't stick until the above enable. */ - intel_panel_set_pwm_level(conn_state, level); - - pch_ctl2 = panel->backlight.pwm_level_max << 16; - intel_de_write(dev_priv, BLC_PWM_PCH_CTL2, pch_ctl2); - - pch_ctl1 = 0; - if (panel->backlight.active_low_pwm) - pch_ctl1 |= BLM_PCH_POLARITY; - - intel_de_write(dev_priv, BLC_PWM_PCH_CTL1, pch_ctl1); - intel_de_posting_read(dev_priv, BLC_PWM_PCH_CTL1); - intel_de_write(dev_priv, BLC_PWM_PCH_CTL1, - pch_ctl1 | BLM_PCH_PWM_ENABLE); -} - -static void i9xx_enable_backlight(const struct intel_crtc_state *crtc_state, - const struct drm_connector_state *conn_state, u32 level) -{ - struct intel_connector *connector = to_intel_connector(conn_state->connector); - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - struct intel_panel *panel = &connector->panel; - u32 ctl, freq; - - ctl = intel_de_read(dev_priv, BLC_PWM_CTL); - if (ctl & BACKLIGHT_DUTY_CYCLE_MASK_PNV) { - drm_dbg_kms(&dev_priv->drm, "backlight already enabled\n"); - intel_de_write(dev_priv, BLC_PWM_CTL, 0); - } - - freq = panel->backlight.pwm_level_max; - if (panel->backlight.combination_mode) - freq /= 0xff; - - ctl = freq << 17; - if (panel->backlight.combination_mode) - ctl |= BLM_LEGACY_MODE; - if (IS_PINEVIEW(dev_priv) && panel->backlight.active_low_pwm) - ctl |= BLM_POLARITY_PNV; - - intel_de_write(dev_priv, BLC_PWM_CTL, ctl); - intel_de_posting_read(dev_priv, BLC_PWM_CTL); - - /* XXX: combine this into above write? */ - intel_panel_set_pwm_level(conn_state, level); - - /* - * Needed to enable backlight on some 855gm models. BLC_HIST_CTL is - * 855gm only, but checking for gen2 is safe, as 855gm is the only gen2 - * that has backlight. - */ - if (DISPLAY_VER(dev_priv) == 2) - intel_de_write(dev_priv, BLC_HIST_CTL, BLM_HISTOGRAM_ENABLE); -} - -static void i965_enable_backlight(const struct intel_crtc_state *crtc_state, - const struct drm_connector_state *conn_state, u32 level) -{ - struct intel_connector *connector = to_intel_connector(conn_state->connector); - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - struct intel_panel *panel = &connector->panel; - enum pipe pipe = to_intel_crtc(conn_state->crtc)->pipe; - u32 ctl, ctl2, freq; - - ctl2 = intel_de_read(dev_priv, BLC_PWM_CTL2); - if (ctl2 & BLM_PWM_ENABLE) { - drm_dbg_kms(&dev_priv->drm, "backlight already enabled\n"); - ctl2 &= ~BLM_PWM_ENABLE; - intel_de_write(dev_priv, BLC_PWM_CTL2, ctl2); - } - - freq = panel->backlight.pwm_level_max; - if (panel->backlight.combination_mode) - freq /= 0xff; - - ctl = freq << 16; - intel_de_write(dev_priv, BLC_PWM_CTL, ctl); - - ctl2 = BLM_PIPE(pipe); - if (panel->backlight.combination_mode) - ctl2 |= BLM_COMBINATION_MODE; - if (panel->backlight.active_low_pwm) - ctl2 |= BLM_POLARITY_I965; - intel_de_write(dev_priv, BLC_PWM_CTL2, ctl2); - intel_de_posting_read(dev_priv, BLC_PWM_CTL2); - intel_de_write(dev_priv, BLC_PWM_CTL2, ctl2 | BLM_PWM_ENABLE); - - intel_panel_set_pwm_level(conn_state, level); -} - -static void vlv_enable_backlight(const struct intel_crtc_state *crtc_state, - const struct drm_connector_state *conn_state, u32 level) -{ - struct intel_connector *connector = to_intel_connector(conn_state->connector); - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - struct intel_panel *panel = &connector->panel; - enum pipe pipe = to_intel_crtc(crtc_state->uapi.crtc)->pipe; - u32 ctl, ctl2; - - ctl2 = intel_de_read(dev_priv, VLV_BLC_PWM_CTL2(pipe)); - if (ctl2 & BLM_PWM_ENABLE) { - drm_dbg_kms(&dev_priv->drm, "backlight already enabled\n"); - ctl2 &= ~BLM_PWM_ENABLE; - intel_de_write(dev_priv, VLV_BLC_PWM_CTL2(pipe), ctl2); - } - - ctl = panel->backlight.pwm_level_max << 16; - intel_de_write(dev_priv, VLV_BLC_PWM_CTL(pipe), ctl); - - /* XXX: combine this into above write? */ - intel_panel_set_pwm_level(conn_state, level); - - ctl2 = 0; - if (panel->backlight.active_low_pwm) - ctl2 |= BLM_POLARITY_I965; - intel_de_write(dev_priv, VLV_BLC_PWM_CTL2(pipe), ctl2); - intel_de_posting_read(dev_priv, VLV_BLC_PWM_CTL2(pipe)); - intel_de_write(dev_priv, VLV_BLC_PWM_CTL2(pipe), - ctl2 | BLM_PWM_ENABLE); -} - -static void bxt_enable_backlight(const struct intel_crtc_state *crtc_state, - const struct drm_connector_state *conn_state, u32 level) -{ - struct intel_connector *connector = to_intel_connector(conn_state->connector); - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - struct intel_panel *panel = &connector->panel; - enum pipe pipe = to_intel_crtc(crtc_state->uapi.crtc)->pipe; - u32 pwm_ctl, val; - - /* Controller 1 uses the utility pin. */ - if (panel->backlight.controller == 1) { - val = intel_de_read(dev_priv, UTIL_PIN_CTL); - if (val & UTIL_PIN_ENABLE) { - drm_dbg_kms(&dev_priv->drm, - "util pin already enabled\n"); - val &= ~UTIL_PIN_ENABLE; - intel_de_write(dev_priv, UTIL_PIN_CTL, val); - } - - val = 0; - if (panel->backlight.util_pin_active_low) - val |= UTIL_PIN_POLARITY; - intel_de_write(dev_priv, UTIL_PIN_CTL, - val | UTIL_PIN_PIPE(pipe) | UTIL_PIN_MODE_PWM | UTIL_PIN_ENABLE); - } - - pwm_ctl = intel_de_read(dev_priv, - BXT_BLC_PWM_CTL(panel->backlight.controller)); - if (pwm_ctl & BXT_BLC_PWM_ENABLE) { - drm_dbg_kms(&dev_priv->drm, "backlight already enabled\n"); - pwm_ctl &= ~BXT_BLC_PWM_ENABLE; - intel_de_write(dev_priv, - BXT_BLC_PWM_CTL(panel->backlight.controller), - pwm_ctl); - } - - intel_de_write(dev_priv, - BXT_BLC_PWM_FREQ(panel->backlight.controller), - panel->backlight.pwm_level_max); - - intel_panel_set_pwm_level(conn_state, level); - - pwm_ctl = 0; - if (panel->backlight.active_low_pwm) - pwm_ctl |= BXT_BLC_PWM_POLARITY; - - intel_de_write(dev_priv, BXT_BLC_PWM_CTL(panel->backlight.controller), - pwm_ctl); - intel_de_posting_read(dev_priv, - BXT_BLC_PWM_CTL(panel->backlight.controller)); - intel_de_write(dev_priv, BXT_BLC_PWM_CTL(panel->backlight.controller), - pwm_ctl | BXT_BLC_PWM_ENABLE); -} - -static void cnp_enable_backlight(const struct intel_crtc_state *crtc_state, - const struct drm_connector_state *conn_state, u32 level) -{ - struct intel_connector *connector = to_intel_connector(conn_state->connector); - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - struct intel_panel *panel = &connector->panel; - u32 pwm_ctl; - - pwm_ctl = intel_de_read(dev_priv, - BXT_BLC_PWM_CTL(panel->backlight.controller)); - if (pwm_ctl & BXT_BLC_PWM_ENABLE) { - drm_dbg_kms(&dev_priv->drm, "backlight already enabled\n"); - pwm_ctl &= ~BXT_BLC_PWM_ENABLE; - intel_de_write(dev_priv, - BXT_BLC_PWM_CTL(panel->backlight.controller), - pwm_ctl); - } - - intel_de_write(dev_priv, - BXT_BLC_PWM_FREQ(panel->backlight.controller), - panel->backlight.pwm_level_max); - - intel_panel_set_pwm_level(conn_state, level); - - pwm_ctl = 0; - if (panel->backlight.active_low_pwm) - pwm_ctl |= BXT_BLC_PWM_POLARITY; - - intel_de_write(dev_priv, BXT_BLC_PWM_CTL(panel->backlight.controller), - pwm_ctl); - intel_de_posting_read(dev_priv, - BXT_BLC_PWM_CTL(panel->backlight.controller)); - intel_de_write(dev_priv, BXT_BLC_PWM_CTL(panel->backlight.controller), - pwm_ctl | BXT_BLC_PWM_ENABLE); -} - -static void ext_pwm_enable_backlight(const struct intel_crtc_state *crtc_state, - const struct drm_connector_state *conn_state, u32 level) -{ - struct intel_connector *connector = to_intel_connector(conn_state->connector); - struct intel_panel *panel = &connector->panel; - - pwm_set_relative_duty_cycle(&panel->backlight.pwm_state, level, 100); - panel->backlight.pwm_state.enabled = true; - pwm_apply_state(panel->backlight.pwm, &panel->backlight.pwm_state); -} - -static void __intel_panel_enable_backlight(const struct intel_crtc_state *crtc_state, - const struct drm_connector_state *conn_state) -{ - struct intel_connector *connector = to_intel_connector(conn_state->connector); - struct intel_panel *panel = &connector->panel; - - WARN_ON(panel->backlight.max == 0); - - if (panel->backlight.level <= panel->backlight.min) { - panel->backlight.level = panel->backlight.max; - if (panel->backlight.device) - panel->backlight.device->props.brightness = - scale_hw_to_user(connector, - panel->backlight.level, - panel->backlight.device->props.max_brightness); - } - - panel->backlight.funcs->enable(crtc_state, conn_state, panel->backlight.level); - panel->backlight.enabled = true; - if (panel->backlight.device) - panel->backlight.device->props.power = FB_BLANK_UNBLANK; -} - -void intel_panel_enable_backlight(const struct intel_crtc_state *crtc_state, - const struct drm_connector_state *conn_state) -{ - struct intel_connector *connector = to_intel_connector(conn_state->connector); - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - struct intel_panel *panel = &connector->panel; - enum pipe pipe = to_intel_crtc(crtc_state->uapi.crtc)->pipe; - - if (!panel->backlight.present) - return; - - drm_dbg_kms(&dev_priv->drm, "pipe %c\n", pipe_name(pipe)); - - mutex_lock(&dev_priv->backlight_lock); - - __intel_panel_enable_backlight(crtc_state, conn_state); - - mutex_unlock(&dev_priv->backlight_lock); -} - -#if IS_ENABLED(CONFIG_BACKLIGHT_CLASS_DEVICE) -static u32 intel_panel_get_backlight(struct intel_connector *connector) -{ - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - struct intel_panel *panel = &connector->panel; - u32 val = 0; - - mutex_lock(&dev_priv->backlight_lock); - - if (panel->backlight.enabled) - val = panel->backlight.funcs->get(connector, intel_connector_get_pipe(connector)); - - mutex_unlock(&dev_priv->backlight_lock); - - drm_dbg_kms(&dev_priv->drm, "get backlight PWM = %d\n", val); - return val; -} - -/* Scale user_level in range [0..user_max] to [hw_min..hw_max]. */ -static u32 scale_user_to_hw(struct intel_connector *connector, - u32 user_level, u32 user_max) -{ - struct intel_panel *panel = &connector->panel; - - return scale(user_level, 0, user_max, - panel->backlight.min, panel->backlight.max); -} - -/* set backlight brightness to level in range [0..max], scaling wrt hw min */ -static void intel_panel_set_backlight(const struct drm_connector_state *conn_state, - u32 user_level, u32 user_max) -{ - struct intel_connector *connector = to_intel_connector(conn_state->connector); - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - struct intel_panel *panel = &connector->panel; - u32 hw_level; - - if (!panel->backlight.present) - return; - - mutex_lock(&dev_priv->backlight_lock); - - drm_WARN_ON(&dev_priv->drm, panel->backlight.max == 0); - - hw_level = scale_user_to_hw(connector, user_level, user_max); - panel->backlight.level = hw_level; - - if (panel->backlight.enabled) - intel_panel_actually_set_backlight(conn_state, hw_level); - - mutex_unlock(&dev_priv->backlight_lock); -} - -static int intel_backlight_device_update_status(struct backlight_device *bd) -{ - struct intel_connector *connector = bl_get_data(bd); - struct intel_panel *panel = &connector->panel; - struct drm_device *dev = connector->base.dev; - - drm_modeset_lock(&dev->mode_config.connection_mutex, NULL); - DRM_DEBUG_KMS("updating intel_backlight, brightness=%d/%d\n", - bd->props.brightness, bd->props.max_brightness); - intel_panel_set_backlight(connector->base.state, bd->props.brightness, - bd->props.max_brightness); - - /* - * Allow flipping bl_power as a sub-state of enabled. Sadly the - * backlight class device does not make it easy to to differentiate - * between callbacks for brightness and bl_power, so our backlight_power - * callback needs to take this into account. - */ - if (panel->backlight.enabled) { - if (panel->backlight.power) { - bool enable = bd->props.power == FB_BLANK_UNBLANK && - bd->props.brightness != 0; - panel->backlight.power(connector, enable); - } - } else { - bd->props.power = FB_BLANK_POWERDOWN; - } - - drm_modeset_unlock(&dev->mode_config.connection_mutex); - return 0; -} - -static int intel_backlight_device_get_brightness(struct backlight_device *bd) -{ - struct intel_connector *connector = bl_get_data(bd); - struct drm_device *dev = connector->base.dev; - struct drm_i915_private *dev_priv = to_i915(dev); - intel_wakeref_t wakeref; - int ret = 0; - - with_intel_runtime_pm(&dev_priv->runtime_pm, wakeref) { - u32 hw_level; - - drm_modeset_lock(&dev->mode_config.connection_mutex, NULL); - - hw_level = intel_panel_get_backlight(connector); - ret = scale_hw_to_user(connector, - hw_level, bd->props.max_brightness); - - drm_modeset_unlock(&dev->mode_config.connection_mutex); - } - - return ret; -} - -static const struct backlight_ops intel_backlight_device_ops = { - .update_status = intel_backlight_device_update_status, - .get_brightness = intel_backlight_device_get_brightness, -}; - -int intel_backlight_device_register(struct intel_connector *connector) -{ - struct drm_i915_private *i915 = to_i915(connector->base.dev); - struct intel_panel *panel = &connector->panel; - struct backlight_properties props; - struct backlight_device *bd; - const char *name; - int ret = 0; - - if (WARN_ON(panel->backlight.device)) - return -ENODEV; - - if (!panel->backlight.present) - return 0; - - WARN_ON(panel->backlight.max == 0); - - memset(&props, 0, sizeof(props)); - props.type = BACKLIGHT_RAW; - - /* - * Note: Everything should work even if the backlight device max - * presented to the userspace is arbitrarily chosen. - */ - props.max_brightness = panel->backlight.max; - props.brightness = scale_hw_to_user(connector, - panel->backlight.level, - props.max_brightness); - - if (panel->backlight.enabled) - props.power = FB_BLANK_UNBLANK; - else - props.power = FB_BLANK_POWERDOWN; - - name = kstrdup("intel_backlight", GFP_KERNEL); - if (!name) - return -ENOMEM; - - bd = backlight_device_register(name, connector->base.kdev, connector, - &intel_backlight_device_ops, &props); - - /* - * Using the same name independent of the drm device or connector - * prevents registration of multiple backlight devices in the - * driver. However, we need to use the default name for backward - * compatibility. Use unique names for subsequent backlight devices as a - * fallback when the default name already exists. - */ - if (IS_ERR(bd) && PTR_ERR(bd) == -EEXIST) { - kfree(name); - name = kasprintf(GFP_KERNEL, "card%d-%s-backlight", - i915->drm.primary->index, connector->base.name); - if (!name) - return -ENOMEM; - - bd = backlight_device_register(name, connector->base.kdev, connector, - &intel_backlight_device_ops, &props); - } - - if (IS_ERR(bd)) { - drm_err(&i915->drm, - "[CONNECTOR:%d:%s] backlight device %s register failed: %ld\n", - connector->base.base.id, connector->base.name, name, PTR_ERR(bd)); - ret = PTR_ERR(bd); - goto out; - } - - panel->backlight.device = bd; - - drm_dbg_kms(&i915->drm, - "[CONNECTOR:%d:%s] backlight device %s registered\n", - connector->base.base.id, connector->base.name, name); - -out: - kfree(name); - - return ret; -} - -void intel_backlight_device_unregister(struct intel_connector *connector) -{ - struct intel_panel *panel = &connector->panel; - - if (panel->backlight.device) { - backlight_device_unregister(panel->backlight.device); - panel->backlight.device = NULL; - } -} -#endif /* CONFIG_BACKLIGHT_CLASS_DEVICE */ - -/* - * CNP: PWM clock frequency is 19.2 MHz or 24 MHz. - * PWM increment = 1 - */ -static u32 cnp_hz_to_pwm(struct intel_connector *connector, u32 pwm_freq_hz) -{ - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - - return DIV_ROUND_CLOSEST(KHz(RUNTIME_INFO(dev_priv)->rawclk_freq), - pwm_freq_hz); -} - -/* - * BXT: PWM clock frequency = 19.2 MHz. - */ -static u32 bxt_hz_to_pwm(struct intel_connector *connector, u32 pwm_freq_hz) -{ - return DIV_ROUND_CLOSEST(KHz(19200), pwm_freq_hz); -} - -/* - * SPT: This value represents the period of the PWM stream in clock periods - * multiplied by 16 (default increment) or 128 (alternate increment selected in - * SCHICKEN_1 bit 0). PWM clock is 24 MHz. - */ -static u32 spt_hz_to_pwm(struct intel_connector *connector, u32 pwm_freq_hz) -{ - struct intel_panel *panel = &connector->panel; - u32 mul; - - if (panel->backlight.alternate_pwm_increment) - mul = 128; - else - mul = 16; - - return DIV_ROUND_CLOSEST(MHz(24), pwm_freq_hz * mul); -} - -/* - * LPT: This value represents the period of the PWM stream in clock periods - * multiplied by 128 (default increment) or 16 (alternate increment, selected in - * LPT SOUTH_CHICKEN2 register bit 5). - */ -static u32 lpt_hz_to_pwm(struct intel_connector *connector, u32 pwm_freq_hz) -{ - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - struct intel_panel *panel = &connector->panel; - u32 mul, clock; - - if (panel->backlight.alternate_pwm_increment) - mul = 16; - else - mul = 128; - - if (HAS_PCH_LPT_H(dev_priv)) - clock = MHz(135); /* LPT:H */ - else - clock = MHz(24); /* LPT:LP */ - - return DIV_ROUND_CLOSEST(clock, pwm_freq_hz * mul); -} - -/* - * ILK/SNB/IVB: This value represents the period of the PWM stream in PCH - * display raw clocks multiplied by 128. - */ -static u32 pch_hz_to_pwm(struct intel_connector *connector, u32 pwm_freq_hz) -{ - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - - return DIV_ROUND_CLOSEST(KHz(RUNTIME_INFO(dev_priv)->rawclk_freq), - pwm_freq_hz * 128); -} - -/* - * Gen2: This field determines the number of time base events (display core - * clock frequency/32) in total for a complete cycle of modulated backlight - * control. - * - * Gen3: A time base event equals the display core clock ([DevPNV] HRAW clock) - * divided by 32. - */ -static u32 i9xx_hz_to_pwm(struct intel_connector *connector, u32 pwm_freq_hz) -{ - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - int clock; - - if (IS_PINEVIEW(dev_priv)) - clock = KHz(RUNTIME_INFO(dev_priv)->rawclk_freq); - else - clock = KHz(dev_priv->cdclk.hw.cdclk); - - return DIV_ROUND_CLOSEST(clock, pwm_freq_hz * 32); -} - -/* - * Gen4: This value represents the period of the PWM stream in display core - * clocks ([DevCTG] HRAW clocks) multiplied by 128. - * - */ -static u32 i965_hz_to_pwm(struct intel_connector *connector, u32 pwm_freq_hz) -{ - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - int clock; - - if (IS_G4X(dev_priv)) - clock = KHz(RUNTIME_INFO(dev_priv)->rawclk_freq); - else - clock = KHz(dev_priv->cdclk.hw.cdclk); - - return DIV_ROUND_CLOSEST(clock, pwm_freq_hz * 128); -} - -/* - * VLV: This value represents the period of the PWM stream in display core - * clocks ([DevCTG] 200MHz HRAW clocks) multiplied by 128 or 25MHz S0IX clocks - * multiplied by 16. CHV uses a 19.2MHz S0IX clock. - */ -static u32 vlv_hz_to_pwm(struct intel_connector *connector, u32 pwm_freq_hz) -{ - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - int mul, clock; - - if ((intel_de_read(dev_priv, CBR1_VLV) & CBR_PWM_CLOCK_MUX_SELECT) == 0) { - if (IS_CHERRYVIEW(dev_priv)) - clock = KHz(19200); - else - clock = MHz(25); - mul = 16; - } else { - clock = KHz(RUNTIME_INFO(dev_priv)->rawclk_freq); - mul = 128; - } - - return DIV_ROUND_CLOSEST(clock, pwm_freq_hz * mul); -} - -static u16 get_vbt_pwm_freq(struct drm_i915_private *dev_priv) -{ - u16 pwm_freq_hz = dev_priv->vbt.backlight.pwm_freq_hz; - - if (pwm_freq_hz) { - drm_dbg_kms(&dev_priv->drm, - "VBT defined backlight frequency %u Hz\n", - pwm_freq_hz); - } else { - pwm_freq_hz = 200; - drm_dbg_kms(&dev_priv->drm, - "default backlight frequency %u Hz\n", - pwm_freq_hz); - } - - return pwm_freq_hz; -} - -static u32 get_backlight_max_vbt(struct intel_connector *connector) -{ - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - struct intel_panel *panel = &connector->panel; - u16 pwm_freq_hz = get_vbt_pwm_freq(dev_priv); - u32 pwm; - - if (!panel->backlight.pwm_funcs->hz_to_pwm) { - drm_dbg_kms(&dev_priv->drm, - "backlight frequency conversion not supported\n"); - return 0; - } - - pwm = panel->backlight.pwm_funcs->hz_to_pwm(connector, pwm_freq_hz); - if (!pwm) { - drm_dbg_kms(&dev_priv->drm, - "backlight frequency conversion failed\n"); - return 0; - } - - return pwm; -} - -/* - * Note: The setup hooks can't assume pipe is set! - */ -static u32 get_backlight_min_vbt(struct intel_connector *connector) -{ - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - struct intel_panel *panel = &connector->panel; - int min; - - drm_WARN_ON(&dev_priv->drm, panel->backlight.pwm_level_max == 0); - - /* - * XXX: If the vbt value is 255, it makes min equal to max, which leads - * to problems. There are such machines out there. Either our - * interpretation is wrong or the vbt has bogus data. Or both. Safeguard - * against this by letting the minimum be at most (arbitrarily chosen) - * 25% of the max. - */ - min = clamp_t(int, dev_priv->vbt.backlight.min_brightness, 0, 64); - if (min != dev_priv->vbt.backlight.min_brightness) { - drm_dbg_kms(&dev_priv->drm, - "clamping VBT min backlight %d/255 to %d/255\n", - dev_priv->vbt.backlight.min_brightness, min); - } - - /* vbt value is a coefficient in range [0..255] */ - return scale(min, 0, 255, 0, panel->backlight.pwm_level_max); -} - -static int lpt_setup_backlight(struct intel_connector *connector, enum pipe unused) -{ - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - struct intel_panel *panel = &connector->panel; - u32 cpu_ctl2, pch_ctl1, pch_ctl2, val; - bool alt, cpu_mode; - - if (HAS_PCH_LPT(dev_priv)) - alt = intel_de_read(dev_priv, SOUTH_CHICKEN2) & LPT_PWM_GRANULARITY; - else - alt = intel_de_read(dev_priv, SOUTH_CHICKEN1) & SPT_PWM_GRANULARITY; - panel->backlight.alternate_pwm_increment = alt; - - pch_ctl1 = intel_de_read(dev_priv, BLC_PWM_PCH_CTL1); - panel->backlight.active_low_pwm = pch_ctl1 & BLM_PCH_POLARITY; - - pch_ctl2 = intel_de_read(dev_priv, BLC_PWM_PCH_CTL2); - panel->backlight.pwm_level_max = pch_ctl2 >> 16; - - cpu_ctl2 = intel_de_read(dev_priv, BLC_PWM_CPU_CTL2); - - if (!panel->backlight.pwm_level_max) - panel->backlight.pwm_level_max = get_backlight_max_vbt(connector); - - if (!panel->backlight.pwm_level_max) - return -ENODEV; - - panel->backlight.pwm_level_min = get_backlight_min_vbt(connector); - - panel->backlight.pwm_enabled = pch_ctl1 & BLM_PCH_PWM_ENABLE; - - cpu_mode = panel->backlight.pwm_enabled && HAS_PCH_LPT(dev_priv) && - !(pch_ctl1 & BLM_PCH_OVERRIDE_ENABLE) && - (cpu_ctl2 & BLM_PWM_ENABLE); - - if (cpu_mode) { - val = pch_get_backlight(connector, unused); - - drm_dbg_kms(&dev_priv->drm, - "CPU backlight register was enabled, switching to PCH override\n"); - - /* Write converted CPU PWM value to PCH override register */ - lpt_set_backlight(connector->base.state, val); - intel_de_write(dev_priv, BLC_PWM_PCH_CTL1, - pch_ctl1 | BLM_PCH_OVERRIDE_ENABLE); - - intel_de_write(dev_priv, BLC_PWM_CPU_CTL2, - cpu_ctl2 & ~BLM_PWM_ENABLE); - } - - return 0; -} - -static int pch_setup_backlight(struct intel_connector *connector, enum pipe unused) -{ - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - struct intel_panel *panel = &connector->panel; - u32 cpu_ctl2, pch_ctl1, pch_ctl2; - - pch_ctl1 = intel_de_read(dev_priv, BLC_PWM_PCH_CTL1); - panel->backlight.active_low_pwm = pch_ctl1 & BLM_PCH_POLARITY; - - pch_ctl2 = intel_de_read(dev_priv, BLC_PWM_PCH_CTL2); - panel->backlight.pwm_level_max = pch_ctl2 >> 16; - - if (!panel->backlight.pwm_level_max) - panel->backlight.pwm_level_max = get_backlight_max_vbt(connector); - - if (!panel->backlight.pwm_level_max) - return -ENODEV; - - panel->backlight.pwm_level_min = get_backlight_min_vbt(connector); - - cpu_ctl2 = intel_de_read(dev_priv, BLC_PWM_CPU_CTL2); - panel->backlight.pwm_enabled = (cpu_ctl2 & BLM_PWM_ENABLE) && - (pch_ctl1 & BLM_PCH_PWM_ENABLE); - - return 0; -} - -static int i9xx_setup_backlight(struct intel_connector *connector, enum pipe unused) -{ - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - struct intel_panel *panel = &connector->panel; - u32 ctl, val; - - ctl = intel_de_read(dev_priv, BLC_PWM_CTL); - - if (DISPLAY_VER(dev_priv) == 2 || IS_I915GM(dev_priv) || IS_I945GM(dev_priv)) - panel->backlight.combination_mode = ctl & BLM_LEGACY_MODE; - - if (IS_PINEVIEW(dev_priv)) - panel->backlight.active_low_pwm = ctl & BLM_POLARITY_PNV; - - panel->backlight.pwm_level_max = ctl >> 17; - - if (!panel->backlight.pwm_level_max) { - panel->backlight.pwm_level_max = get_backlight_max_vbt(connector); - panel->backlight.pwm_level_max >>= 1; - } - - if (!panel->backlight.pwm_level_max) - return -ENODEV; - - if (panel->backlight.combination_mode) - panel->backlight.pwm_level_max *= 0xff; - - panel->backlight.pwm_level_min = get_backlight_min_vbt(connector); - - val = i9xx_get_backlight(connector, unused); - val = intel_panel_invert_pwm_level(connector, val); - val = clamp(val, panel->backlight.pwm_level_min, panel->backlight.pwm_level_max); - - panel->backlight.pwm_enabled = val != 0; - - return 0; -} - -static int i965_setup_backlight(struct intel_connector *connector, enum pipe unused) -{ - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - struct intel_panel *panel = &connector->panel; - u32 ctl, ctl2; - - ctl2 = intel_de_read(dev_priv, BLC_PWM_CTL2); - panel->backlight.combination_mode = ctl2 & BLM_COMBINATION_MODE; - panel->backlight.active_low_pwm = ctl2 & BLM_POLARITY_I965; - - ctl = intel_de_read(dev_priv, BLC_PWM_CTL); - panel->backlight.pwm_level_max = ctl >> 16; - - if (!panel->backlight.pwm_level_max) - panel->backlight.pwm_level_max = get_backlight_max_vbt(connector); - - if (!panel->backlight.pwm_level_max) - return -ENODEV; - - if (panel->backlight.combination_mode) - panel->backlight.pwm_level_max *= 0xff; - - panel->backlight.pwm_level_min = get_backlight_min_vbt(connector); - - panel->backlight.pwm_enabled = ctl2 & BLM_PWM_ENABLE; - - return 0; -} - -static int vlv_setup_backlight(struct intel_connector *connector, enum pipe pipe) -{ - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - struct intel_panel *panel = &connector->panel; - u32 ctl, ctl2; - - if (drm_WARN_ON(&dev_priv->drm, pipe != PIPE_A && pipe != PIPE_B)) - return -ENODEV; - - ctl2 = intel_de_read(dev_priv, VLV_BLC_PWM_CTL2(pipe)); - panel->backlight.active_low_pwm = ctl2 & BLM_POLARITY_I965; - - ctl = intel_de_read(dev_priv, VLV_BLC_PWM_CTL(pipe)); - panel->backlight.pwm_level_max = ctl >> 16; - - if (!panel->backlight.pwm_level_max) - panel->backlight.pwm_level_max = get_backlight_max_vbt(connector); - - if (!panel->backlight.pwm_level_max) - return -ENODEV; - - panel->backlight.pwm_level_min = get_backlight_min_vbt(connector); - - panel->backlight.pwm_enabled = ctl2 & BLM_PWM_ENABLE; - - return 0; -} - -static int -bxt_setup_backlight(struct intel_connector *connector, enum pipe unused) -{ - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - struct intel_panel *panel = &connector->panel; - u32 pwm_ctl, val; - - panel->backlight.controller = dev_priv->vbt.backlight.controller; - - pwm_ctl = intel_de_read(dev_priv, - BXT_BLC_PWM_CTL(panel->backlight.controller)); - - /* Controller 1 uses the utility pin. */ - if (panel->backlight.controller == 1) { - val = intel_de_read(dev_priv, UTIL_PIN_CTL); - panel->backlight.util_pin_active_low = - val & UTIL_PIN_POLARITY; - } - - panel->backlight.active_low_pwm = pwm_ctl & BXT_BLC_PWM_POLARITY; - panel->backlight.pwm_level_max = - intel_de_read(dev_priv, BXT_BLC_PWM_FREQ(panel->backlight.controller)); - - if (!panel->backlight.pwm_level_max) - panel->backlight.pwm_level_max = get_backlight_max_vbt(connector); - - if (!panel->backlight.pwm_level_max) - return -ENODEV; - - panel->backlight.pwm_level_min = get_backlight_min_vbt(connector); - - panel->backlight.pwm_enabled = pwm_ctl & BXT_BLC_PWM_ENABLE; - - return 0; -} - -static int -cnp_setup_backlight(struct intel_connector *connector, enum pipe unused) -{ - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - struct intel_panel *panel = &connector->panel; - u32 pwm_ctl; - - /* - * CNP has the BXT implementation of backlight, but with only one - * controller. TODO: ICP has multiple controllers but we only use - * controller 0 for now. - */ - panel->backlight.controller = 0; - - pwm_ctl = intel_de_read(dev_priv, - BXT_BLC_PWM_CTL(panel->backlight.controller)); - - panel->backlight.active_low_pwm = pwm_ctl & BXT_BLC_PWM_POLARITY; - panel->backlight.pwm_level_max = - intel_de_read(dev_priv, BXT_BLC_PWM_FREQ(panel->backlight.controller)); - - if (!panel->backlight.pwm_level_max) - panel->backlight.pwm_level_max = get_backlight_max_vbt(connector); - - if (!panel->backlight.pwm_level_max) - return -ENODEV; - - panel->backlight.pwm_level_min = get_backlight_min_vbt(connector); - - panel->backlight.pwm_enabled = pwm_ctl & BXT_BLC_PWM_ENABLE; - - return 0; -} - -static int ext_pwm_setup_backlight(struct intel_connector *connector, - enum pipe pipe) -{ - struct drm_device *dev = connector->base.dev; - struct drm_i915_private *dev_priv = to_i915(dev); - struct intel_panel *panel = &connector->panel; - const char *desc; - u32 level; - - /* Get the right PWM chip for DSI backlight according to VBT */ - if (dev_priv->vbt.dsi.config->pwm_blc == PPS_BLC_PMIC) { - panel->backlight.pwm = pwm_get(dev->dev, "pwm_pmic_backlight"); - desc = "PMIC"; - } else { - panel->backlight.pwm = pwm_get(dev->dev, "pwm_soc_backlight"); - desc = "SoC"; - } - - if (IS_ERR(panel->backlight.pwm)) { - drm_err(&dev_priv->drm, "Failed to get the %s PWM chip\n", - desc); - panel->backlight.pwm = NULL; - return -ENODEV; - } - - panel->backlight.pwm_level_max = 100; /* 100% */ - panel->backlight.pwm_level_min = get_backlight_min_vbt(connector); - - if (pwm_is_enabled(panel->backlight.pwm)) { - /* PWM is already enabled, use existing settings */ - pwm_get_state(panel->backlight.pwm, &panel->backlight.pwm_state); - - level = pwm_get_relative_duty_cycle(&panel->backlight.pwm_state, - 100); - level = intel_panel_invert_pwm_level(connector, level); - panel->backlight.pwm_enabled = true; - - drm_dbg_kms(&dev_priv->drm, "PWM already enabled at freq %ld, VBT freq %d, level %d\n", - NSEC_PER_SEC / (unsigned long)panel->backlight.pwm_state.period, - get_vbt_pwm_freq(dev_priv), level); - } else { - /* Set period from VBT frequency, leave other settings at 0. */ - panel->backlight.pwm_state.period = - NSEC_PER_SEC / get_vbt_pwm_freq(dev_priv); - } - - drm_info(&dev_priv->drm, "Using %s PWM for LCD backlight control\n", - desc); - return 0; -} - -static void intel_pwm_set_backlight(const struct drm_connector_state *conn_state, u32 level) -{ - struct intel_connector *connector = to_intel_connector(conn_state->connector); - struct intel_panel *panel = &connector->panel; - - panel->backlight.pwm_funcs->set(conn_state, - intel_panel_invert_pwm_level(connector, level)); -} - -static u32 intel_pwm_get_backlight(struct intel_connector *connector, enum pipe pipe) -{ - struct intel_panel *panel = &connector->panel; - - return intel_panel_invert_pwm_level(connector, - panel->backlight.pwm_funcs->get(connector, pipe)); -} - -static void intel_pwm_enable_backlight(const struct intel_crtc_state *crtc_state, - const struct drm_connector_state *conn_state, u32 level) -{ - struct intel_connector *connector = to_intel_connector(conn_state->connector); - struct intel_panel *panel = &connector->panel; - - panel->backlight.pwm_funcs->enable(crtc_state, conn_state, - intel_panel_invert_pwm_level(connector, level)); -} - -static void intel_pwm_disable_backlight(const struct drm_connector_state *conn_state, u32 level) -{ - struct intel_connector *connector = to_intel_connector(conn_state->connector); - struct intel_panel *panel = &connector->panel; - - panel->backlight.pwm_funcs->disable(conn_state, - intel_panel_invert_pwm_level(connector, level)); -} - -static int intel_pwm_setup_backlight(struct intel_connector *connector, enum pipe pipe) -{ - struct intel_panel *panel = &connector->panel; - int ret = panel->backlight.pwm_funcs->setup(connector, pipe); - - if (ret < 0) - return ret; - - panel->backlight.min = panel->backlight.pwm_level_min; - panel->backlight.max = panel->backlight.pwm_level_max; - panel->backlight.level = intel_pwm_get_backlight(connector, pipe); - panel->backlight.enabled = panel->backlight.pwm_enabled; - - return 0; -} - -void intel_panel_update_backlight(struct intel_atomic_state *state, - struct intel_encoder *encoder, - const struct intel_crtc_state *crtc_state, - const struct drm_connector_state *conn_state) -{ - struct intel_connector *connector = to_intel_connector(conn_state->connector); - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - struct intel_panel *panel = &connector->panel; - - if (!panel->backlight.present) - return; - - mutex_lock(&dev_priv->backlight_lock); - if (!panel->backlight.enabled) - __intel_panel_enable_backlight(crtc_state, conn_state); - - mutex_unlock(&dev_priv->backlight_lock); -} - -int intel_panel_setup_backlight(struct drm_connector *connector, enum pipe pipe) -{ - struct drm_i915_private *dev_priv = to_i915(connector->dev); - struct intel_connector *intel_connector = to_intel_connector(connector); - struct intel_panel *panel = &intel_connector->panel; - int ret; - - if (!dev_priv->vbt.backlight.present) { - if (dev_priv->quirks & QUIRK_BACKLIGHT_PRESENT) { - drm_dbg_kms(&dev_priv->drm, - "no backlight present per VBT, but present per quirk\n"); - } else { - drm_dbg_kms(&dev_priv->drm, - "no backlight present per VBT\n"); - return 0; - } - } - - /* ensure intel_panel has been initialized first */ - if (drm_WARN_ON(&dev_priv->drm, !panel->backlight.funcs)) - return -ENODEV; - - /* set level and max in panel struct */ - mutex_lock(&dev_priv->backlight_lock); - ret = panel->backlight.funcs->setup(intel_connector, pipe); - mutex_unlock(&dev_priv->backlight_lock); - - if (ret) { - drm_dbg_kms(&dev_priv->drm, - "failed to setup backlight for connector %s\n", - connector->name); - return ret; - } - - panel->backlight.present = true; - - drm_dbg_kms(&dev_priv->drm, - "Connector %s backlight initialized, %s, brightness %u/%u\n", - connector->name, - enableddisabled(panel->backlight.enabled), - panel->backlight.level, panel->backlight.max); - - return 0; -} - -static void intel_panel_destroy_backlight(struct intel_panel *panel) -{ - /* dispose of the pwm */ - if (panel->backlight.pwm) - pwm_put(panel->backlight.pwm); - - panel->backlight.present = false; -} - -static const struct intel_panel_bl_funcs bxt_pwm_funcs = { - .setup = bxt_setup_backlight, - .enable = bxt_enable_backlight, - .disable = bxt_disable_backlight, - .set = bxt_set_backlight, - .get = bxt_get_backlight, - .hz_to_pwm = bxt_hz_to_pwm, -}; - -static const struct intel_panel_bl_funcs cnp_pwm_funcs = { - .setup = cnp_setup_backlight, - .enable = cnp_enable_backlight, - .disable = cnp_disable_backlight, - .set = bxt_set_backlight, - .get = bxt_get_backlight, - .hz_to_pwm = cnp_hz_to_pwm, -}; - -static const struct intel_panel_bl_funcs lpt_pwm_funcs = { - .setup = lpt_setup_backlight, - .enable = lpt_enable_backlight, - .disable = lpt_disable_backlight, - .set = lpt_set_backlight, - .get = lpt_get_backlight, - .hz_to_pwm = lpt_hz_to_pwm, -}; - -static const struct intel_panel_bl_funcs spt_pwm_funcs = { - .setup = lpt_setup_backlight, - .enable = lpt_enable_backlight, - .disable = lpt_disable_backlight, - .set = lpt_set_backlight, - .get = lpt_get_backlight, - .hz_to_pwm = spt_hz_to_pwm, -}; - -static const struct intel_panel_bl_funcs pch_pwm_funcs = { - .setup = pch_setup_backlight, - .enable = pch_enable_backlight, - .disable = pch_disable_backlight, - .set = pch_set_backlight, - .get = pch_get_backlight, - .hz_to_pwm = pch_hz_to_pwm, -}; - -static const struct intel_panel_bl_funcs ext_pwm_funcs = { - .setup = ext_pwm_setup_backlight, - .enable = ext_pwm_enable_backlight, - .disable = ext_pwm_disable_backlight, - .set = ext_pwm_set_backlight, - .get = ext_pwm_get_backlight, -}; - -static const struct intel_panel_bl_funcs vlv_pwm_funcs = { - .setup = vlv_setup_backlight, - .enable = vlv_enable_backlight, - .disable = vlv_disable_backlight, - .set = vlv_set_backlight, - .get = vlv_get_backlight, - .hz_to_pwm = vlv_hz_to_pwm, -}; - -static const struct intel_panel_bl_funcs i965_pwm_funcs = { - .setup = i965_setup_backlight, - .enable = i965_enable_backlight, - .disable = i965_disable_backlight, - .set = i9xx_set_backlight, - .get = i9xx_get_backlight, - .hz_to_pwm = i965_hz_to_pwm, -}; - -static const struct intel_panel_bl_funcs i9xx_pwm_funcs = { - .setup = i9xx_setup_backlight, - .enable = i9xx_enable_backlight, - .disable = i9xx_disable_backlight, - .set = i9xx_set_backlight, - .get = i9xx_get_backlight, - .hz_to_pwm = i9xx_hz_to_pwm, -}; - -static const struct intel_panel_bl_funcs pwm_bl_funcs = { - .setup = intel_pwm_setup_backlight, - .enable = intel_pwm_enable_backlight, - .disable = intel_pwm_disable_backlight, - .set = intel_pwm_set_backlight, - .get = intel_pwm_get_backlight, -}; - -/* Set up chip specific backlight functions */ -static void -intel_panel_init_backlight_funcs(struct intel_panel *panel) -{ - struct intel_connector *connector = - container_of(panel, struct intel_connector, panel); - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - - if (connector->base.connector_type == DRM_MODE_CONNECTOR_DSI && - intel_dsi_dcs_init_backlight_funcs(connector) == 0) - return; - - if (IS_GEMINILAKE(dev_priv) || IS_BROXTON(dev_priv)) { - panel->backlight.pwm_funcs = &bxt_pwm_funcs; - } else if (INTEL_PCH_TYPE(dev_priv) >= PCH_CNP) { - panel->backlight.pwm_funcs = &cnp_pwm_funcs; - } else if (INTEL_PCH_TYPE(dev_priv) >= PCH_LPT) { - if (HAS_PCH_LPT(dev_priv)) - panel->backlight.pwm_funcs = &lpt_pwm_funcs; - else - panel->backlight.pwm_funcs = &spt_pwm_funcs; - } else if (HAS_PCH_SPLIT(dev_priv)) { - panel->backlight.pwm_funcs = &pch_pwm_funcs; - } else if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) { - if (connector->base.connector_type == DRM_MODE_CONNECTOR_DSI) { - panel->backlight.pwm_funcs = &ext_pwm_funcs; - } else { - panel->backlight.pwm_funcs = &vlv_pwm_funcs; - } - } else if (DISPLAY_VER(dev_priv) == 4) { - panel->backlight.pwm_funcs = &i965_pwm_funcs; - } else { - panel->backlight.pwm_funcs = &i9xx_pwm_funcs; - } - - if (connector->base.connector_type == DRM_MODE_CONNECTOR_eDP && - intel_dp_aux_init_backlight_funcs(connector) == 0) - return; - - /* We're using a standard PWM backlight interface */ - panel->backlight.funcs = &pwm_bl_funcs; -} - enum drm_connector_status intel_panel_detect(struct drm_connector *connector, bool force) { diff --git a/drivers/gpu/drm/i915/display/intel_panel.h b/drivers/gpu/drm/i915/display/intel_panel.h index 1d340f77bffc7..67dbb15026bf1 100644 --- a/drivers/gpu/drm/i915/display/intel_panel.h +++ b/drivers/gpu/drm/i915/display/intel_panel.h @@ -8,15 +8,13 @@ #include <linux/types.h> -#include "intel_display.h" - +enum drm_connector_status; struct drm_connector; struct drm_connector_state; struct drm_display_mode; +struct drm_i915_private; struct intel_connector; -struct intel_crtc; struct intel_crtc_state; -struct intel_encoder; struct intel_panel; int intel_panel_init(struct intel_panel *panel, @@ -31,17 +29,6 @@ int intel_pch_panel_fitting(struct intel_crtc_state *crtc_state, const struct drm_connector_state *conn_state); int intel_gmch_panel_fitting(struct intel_crtc_state *crtc_state, const struct drm_connector_state *conn_state); -void intel_panel_set_backlight_acpi(const struct drm_connector_state *conn_state, - u32 level, u32 max); -int intel_panel_setup_backlight(struct drm_connector *connector, - enum pipe pipe); -void intel_panel_enable_backlight(const struct intel_crtc_state *crtc_state, - const struct drm_connector_state *conn_state); -void intel_panel_update_backlight(struct intel_atomic_state *state, - struct intel_encoder *encoder, - const struct intel_crtc_state *crtc_state, - const struct drm_connector_state *conn_state); -void intel_panel_disable_backlight(const struct drm_connector_state *old_conn_state); struct drm_display_mode * intel_panel_edid_downclock_mode(struct intel_connector *connector, const struct drm_display_mode *fixed_mode); @@ -49,22 +36,5 @@ struct drm_display_mode * intel_panel_edid_fixed_mode(struct intel_connector *connector); struct drm_display_mode * intel_panel_vbt_fixed_mode(struct intel_connector *connector); -void intel_panel_set_pwm_level(const struct drm_connector_state *conn_state, u32 level); -u32 intel_panel_invert_pwm_level(struct intel_connector *connector, u32 level); -u32 intel_panel_backlight_level_to_pwm(struct intel_connector *connector, u32 level); -u32 intel_panel_backlight_level_from_pwm(struct intel_connector *connector, u32 val); - -#if IS_ENABLED(CONFIG_BACKLIGHT_CLASS_DEVICE) -int intel_backlight_device_register(struct intel_connector *connector); -void intel_backlight_device_unregister(struct intel_connector *connector); -#else /* CONFIG_BACKLIGHT_CLASS_DEVICE */ -static inline int intel_backlight_device_register(struct intel_connector *connector) -{ - return 0; -} -static inline void intel_backlight_device_unregister(struct intel_connector *connector) -{ -} -#endif /* CONFIG_BACKLIGHT_CLASS_DEVICE */ #endif /* __INTEL_PANEL_H__ */ diff --git a/drivers/gpu/drm/i915/display/vlv_dsi.c b/drivers/gpu/drm/i915/display/vlv_dsi.c index 0ee4ff341e25d..b27738df447d0 100644 --- a/drivers/gpu/drm/i915/display/vlv_dsi.c +++ b/drivers/gpu/drm/i915/display/vlv_dsi.c @@ -32,6 +32,7 @@ #include "i915_drv.h" #include "intel_atomic.h" +#include "intel_backlight.h" #include "intel_connector.h" #include "intel_crtc.h" #include "intel_de.h" -- 2.35.1
