If the source of the backlight PWM is from the
panel then the PWM can be controlled by DCS
command, this patch adds the support to
enable/disbale panel PWM, control backlight level
etc...
v2: Moving the CABC bkl functions to new file.(Jani)
v3: Rebase
v4: Rebase
v5: Use mipi_dsi_dcs_write() instead of mipi_dsi_dcs_write_buffer() (Jani)
Move DCS macro`s to include/video/mipi_display.h (Jani)
v6: Rename the file to intel_dsi_dcs_backlight.c
Removing the CABC operations
Cc: Jani Nikula <jani.nikula@xxxxxxxxx>
Cc: Daniel Vetter <daniel.vetter@xxxxxxxxx>
Cc: Yetunde Adebisi <yetundex.adebisi@xxxxxxxxx>
Signed-off-by: Deepak M <m.deepak@xxxxxxxxx>
---
drivers/gpu/drm/i915/Makefile | 1 +
drivers/gpu/drm/i915/i915_drv.h | 1 -
drivers/gpu/drm/i915/intel_drv.h | 2 +
drivers/gpu/drm/i915/intel_dsi.c | 24 +++-
drivers/gpu/drm/i915/intel_dsi.h | 4 +
drivers/gpu/drm/i915/intel_dsi_dcs_backlight.c | 160 +++++++++++++++++++++++++
drivers/gpu/drm/i915/intel_panel.c | 4 +
7 files changed, 193 insertions(+), 3 deletions(-)
create mode 100644 drivers/gpu/drm/i915/intel_dsi_dcs_backlight.c
diff --git a/drivers/gpu/drm/i915/Makefile b/drivers/gpu/drm/i915/Makefile
index 7ffb51b..3f6a3cf 100644
--- a/drivers/gpu/drm/i915/Makefile
+++ b/drivers/gpu/drm/i915/Makefile
@@ -83,6 +83,7 @@ i915-y += dvo_ch7017.o \
intel_dp_mst.o \
intel_dp.o \
intel_dsi.o \
+ intel_dsi_dcs_backlight.o \
intel_dsi_panel_vbt.o \
intel_dsi_pll.o \
intel_dvo.o \
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 30321e6..7d6118d 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -3491,7 +3491,6 @@ void intel_sbi_write(struct drm_i915_private *dev_priv, u16 reg, u32 value,
enum intel_sbi_destination destination);
u32 vlv_flisdsi_read(struct drm_i915_private *dev_priv, u32 reg);
void vlv_flisdsi_write(struct drm_i915_private *dev_priv, u32 reg, u32 val);
-
int intel_gpu_freq(struct drm_i915_private *dev_priv, int val);
int intel_freq_opcode(struct drm_i915_private *dev_priv, int val);
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index 02a74b0..0603c9f 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -1330,6 +1330,8 @@ void intel_dp_mst_encoder_cleanup(struct intel_digital_port *intel_dig_port);
/* intel_dsi.c */
void intel_dsi_init(struct drm_device *dev);
+/* intel_dsi_panel_pwm.c */
+int intel_dsi_panel_pwm_init_backlight_funcs(struct intel_connector *intel_connector);
/* intel_dvo.c */
void intel_dvo_init(struct drm_device *dev);
diff --git a/drivers/gpu/drm/i915/intel_dsi.c b/drivers/gpu/drm/i915/intel_dsi.c
index 456676c..1ba757a 100644
--- a/drivers/gpu/drm/i915/intel_dsi.c
+++ b/drivers/gpu/drm/i915/intel_dsi.c
@@ -1209,10 +1209,30 @@ void intel_dsi_init(struct drm_device *dev)
else
intel_encoder->crtc_mask = BIT(PIPE_B);
- if (dev_priv->vbt.dsi.config->dual_link)
+ if (dev_priv->vbt.dsi.config->dual_link) {
intel_dsi->ports = BIT(PORT_A) | BIT(PORT_C);
- else
+
+ /*
+ * Based on the VBT value assign the ports on
+ * which Panel PWM On/OFF DCS coomands needs to be sent
+ */
+ switch (dev_priv->vbt.dsi.config->dl_panel_pwm_ports) {
+ case PANEL_PWM_PORT_A:
+ intel_dsi->panel_pwm_dcs_ports = BIT(PORT_A);
+ break;
+ case PANEL_PWM_PORT_C:
+ intel_dsi->panel_pwm_dcs_ports = BIT(PORT_C);
+ break;
+ case PANEL_PWM_PORT_A_AND_C:
+ intel_dsi->panel_pwm_dcs_ports = BIT(PORT_A) | BIT(PORT_C);
+ break;
+ default:
+ intel_dsi->panel_pwm_dcs_ports = BIT(PORT_A) | BIT(PORT_C);
+ }
+ } else {
intel_dsi->ports = BIT(port);
+ intel_dsi->panel_pwm_dcs_ports = BIT(port);
+ }
/* Create a DSI host (and a device) for each port. */
for_each_dsi_port(port, intel_dsi->ports) {
diff --git a/drivers/gpu/drm/i915/intel_dsi.h b/drivers/gpu/drm/i915/intel_dsi.h
index f54748d..dcd2265 100644
--- a/drivers/gpu/drm/i915/intel_dsi.h
+++ b/drivers/gpu/drm/i915/intel_dsi.h
@@ -34,6 +34,10 @@
#define DSI_DUAL_LINK_FRONT_BACK 1
#define DSI_DUAL_LINK_PIXEL_ALT 2
+#define PANEL_PWM_PORT_A 0x00
+#define PANEL_PWM_PORT_C 0x01
+#define PANEL_PWM_PORT_A_AND_C 0x02
+
struct intel_dsi_host;
struct intel_dsi {
diff --git a/drivers/gpu/drm/i915/intel_dsi_dcs_backlight.c b/drivers/gpu/drm/i915/intel_dsi_dcs_backlight.c
new file mode 100644
index 0000000..4d7f0eb
--- /dev/null
+++ b/drivers/gpu/drm/i915/intel_dsi_dcs_backlight.c
@@ -0,0 +1,160 @@
+/*
+ * Copyright © 2016 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ *
+ * Author: Deepak M <m.deepak at intel.com>
+ */
+
+#include "intel_drv.h"
+#include "intel_dsi.h"
+#include "i915_drv.h"
+#include <video/mipi_display.h>
+#include <drm/drm_mipi_dsi.h>
+
+#define PANEL_PWM_BKL_EN (1 << 2)
+#define PANEL_PWM_DISP_DIMMING (1 << 3)
+#define PANEL_PWM_BCTRL (1 << 5)
+
+#define PANEL_PWM_MAX_VALUE 0xFF
+
+static u32 panel_pwm_get_backlight(struct intel_connector *connector)
+{
+ struct intel_encoder *encoder = connector->encoder;
+ struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
+ struct mipi_dsi_device *dsi_device;
+ u8 data;
+ enum port port;
+
+ /* FIXME Need to take care of 16 bit brightness level */
+ /*
+ * Sending the DCS commands to the ports to which Panel PWM
+ * On/Off commands were send
+ */
+ for_each_dsi_port(port, intel_dsi->panel_pwm_dcs_ports) {
+ dsi_device = intel_dsi->dsi_hosts[port]->device;
+ mipi_dsi_dcs_read(dsi_device, MIPI_DCS_GET_DISPLAY_BRIGHTNESS,
+ &data, sizeof(data));
+ break;
+ }
+
+ return data;
+}
+
+static void panel_pwm_set_backlight(struct intel_connector *connector, u32 level)
+{
+ struct intel_encoder *encoder = connector->encoder;
+ struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
+ struct mipi_dsi_device *dsi_device;
+ u8 data;
+ enum port port;
+
+ /* FIXME Need to take care of 16 bit brightness level */
+ /*
+ * Sending the DCS commands to the ports to which Panel PWM
+ * On/Off commands were send
+ */
+ for_each_dsi_port(port, intel_dsi->panel_pwm_dcs_ports) {
+ dsi_device = intel_dsi->dsi_hosts[port]->device;
+ data = level;
+ mipi_dsi_dcs_write(dsi_device, MIPI_DCS_SET_DISPLAY_BRIGHTNESS,
+ &data, sizeof(data));
+ }
+}
+
+static void panel_pwm_disable_backlight(struct intel_connector *connector)
+{
+ struct intel_encoder *encoder = connector->encoder;
+ struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
+ struct mipi_dsi_device *dsi_device;
+ enum port port;
+ u8 data;
+
+ panel_pwm_set_backlight(connector, 0);
+
+ for_each_dsi_port(port, intel_dsi->panel_pwm_dcs_ports) {
+ dsi_device = intel_dsi->dsi_hosts[port]->device;
+ data &= ~PANEL_PWM_BKL_EN; /* Turn Off Backlight */
+ data &= ~PANEL_PWM_DISP_DIMMING; /* Display Dimming Off */
+ data &= ~PANEL_PWM_BCTRL; /* Brightness control Block Off */
+ mipi_dsi_dcs_write(dsi_device, MIPI_DCS_WRITE_CONTROL_DISPLAY,
+ &data, sizeof(data));
+ }
+}
+
+static void panel_pwm_enable_backlight(struct intel_connector *connector)
+{
+ struct intel_encoder *encoder = connector->encoder;
+ struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
+ struct intel_panel *panel = &connector->panel;
+ struct mipi_dsi_device *dsi_device;
+ enum port port;
+ u8 data;
+
+ for_each_dsi_port(port, intel_dsi->panel_pwm_dcs_ports) {
+ dsi_device = intel_dsi->dsi_hosts[port]->device;
+ data = PANEL_PWM_BKL_EN /* Turn on backlight */
+ | PANEL_PWM_DISP_DIMMING /* Display Dimming On */
+ | PANEL_PWM_BCTRL; /* Brightness control Block On */
+ mipi_dsi_dcs_write(dsi_device, MIPI_DCS_WRITE_CONTROL_DISPLAY,
+ &data, sizeof(data));
+ }
+
+ panel_pwm_set_backlight(connector, panel->backlight.level);
+}
+
+static int panel_pwm_setup_backlight(struct intel_connector *connector,
+ enum pipe unused)
+{
+ struct intel_panel *panel = &connector->panel;
+
+ panel->backlight.max = PANEL_PWM_MAX_VALUE;
+ /* Assigning the MAX value during the setup */
+ panel->backlight.level = PANEL_PWM_MAX_VALUE;
+
+ return 0;
+}
+
+int intel_dsi_panel_pwm_init_backlight_funcs(struct intel_connector *intel_connector)
+{
+ struct drm_device *dev = intel_connector->base.dev;
+ struct drm_i915_private *dev_priv = dev->dev_private;
+ struct intel_encoder *encoder = intel_connector->encoder;
+ struct intel_panel *panel = &intel_connector->panel;
+
+ /*
+ * Continue initalizing only if the PWM source is
+ * from the panel
+ */
+ if (dev_priv->vbt.backlight.pwm_pin !=
+ BLC_CONTROL_PIN_PANEL_PWM)
+ return -ENODEV;
+
+ if (WARN_ON(encoder->type != INTEL_OUTPUT_DSI))
+ return -EINVAL;
+
+ panel->backlight.setup = panel_pwm_setup_backlight;
+ panel->backlight.enable = panel_pwm_enable_backlight;
+ panel->backlight.disable = panel_pwm_disable_backlight;
+ panel->backlight.set = panel_pwm_set_backlight;
+ panel->backlight.get = panel_pwm_get_backlight;
+
+ return 0;
+}
diff --git a/drivers/gpu/drm/i915/intel_panel.c b/drivers/gpu/drm/i915/intel_panel.c
index 8c8996f..46ca2de 100644
--- a/drivers/gpu/drm/i915/intel_panel.c
+++ b/drivers/gpu/drm/i915/intel_panel.c
@@ -1718,6 +1718,10 @@ intel_panel_init_backlight_funcs(struct intel_panel *panel)
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_panel_pwm_init_backlight_funcs(connector) == 0)
+ return;
+
if (IS_BROXTON(dev_priv)) {
panel->backlight.setup = bxt_setup_backlight;
panel->backlight.enable = bxt_enable_backlight;
--
1.9.1
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