From: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
Move the PCH refclk stuff (including all the LPT/WPT
iCLKIP/CLKOUT_DP things) to its own file.
We also suck in the mPHY programming from intel_fdi.c
since we're the only caller.
Cc: Dave Airlie <airlied@xxxxxxxxxx>
Cc: Jani Nikula <jani.nikula@xxxxxxxxx>
Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
---
drivers/gpu/drm/i915/Makefile | 1 +
drivers/gpu/drm/i915/display/intel_crt.c | 1 +
drivers/gpu/drm/i915/display/intel_display.c | 537 +--------------
drivers/gpu/drm/i915/display/intel_display.h | 4 -
.../drm/i915/display/intel_display_power.c | 1 +
drivers/gpu/drm/i915/display/intel_dpll_mgr.c | 1 +
drivers/gpu/drm/i915/display/intel_fdi.c | 99 ---
drivers/gpu/drm/i915/display/intel_fdi.h | 1 -
.../gpu/drm/i915/display/intel_pch_refclk.c | 648 ++++++++++++++++++
.../gpu/drm/i915/display/intel_pch_refclk.h | 21 +
drivers/gpu/drm/i915/i915_drv.c | 1 +
11 files changed, 675 insertions(+), 640 deletions(-)
create mode 100644 drivers/gpu/drm/i915/display/intel_pch_refclk.c
create mode 100644 drivers/gpu/drm/i915/display/intel_pch_refclk.h
diff --git a/drivers/gpu/drm/i915/Makefile b/drivers/gpu/drm/i915/Makefile
index 660bb03de6fc..96f3b8f6c50d 100644
--- a/drivers/gpu/drm/i915/Makefile
+++ b/drivers/gpu/drm/i915/Makefile
@@ -226,6 +226,7 @@ i915-y += \
display/intel_hotplug.o \
display/intel_lpe_audio.o \
display/intel_overlay.o \
+ display/intel_pch_refclk.o \
display/intel_plane_initial.o \
display/intel_psr.o \
display/intel_quirks.o \
diff --git a/drivers/gpu/drm/i915/display/intel_crt.c b/drivers/gpu/drm/i915/display/intel_crt.c
index 1c161eeed82f..bf03bd0ecd43 100644
--- a/drivers/gpu/drm/i915/display/intel_crt.c
+++ b/drivers/gpu/drm/i915/display/intel_crt.c
@@ -45,6 +45,7 @@
#include "intel_fifo_underrun.h"
#include "intel_gmbus.h"
#include "intel_hotplug.h"
+#include "intel_pch_refclk.h"
/* Here's the desired hotplug mode */
#define ADPA_HOTPLUG_BITS (ADPA_CRT_HOTPLUG_PERIOD_128 | \
diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
index ff598b6cd953..995050443065 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -96,6 +96,7 @@
#include "intel_hotplug.h"
#include "intel_overlay.h"
#include "intel_panel.h"
+#include "intel_pch_refclk.h"
#include "intel_pcode.h"
#include "intel_pipe_crc.h"
#include "intel_plane_initial.h"
@@ -103,7 +104,6 @@
#include "intel_pps.h"
#include "intel_psr.h"
#include "intel_quirks.h"
-#include "intel_sbi.h"
#include "intel_sprite.h"
#include "intel_tc.h"
#include "intel_vga.h"
@@ -1388,133 +1388,6 @@ bool intel_has_pending_fb_unpin(struct drm_i915_private *dev_priv)
return false;
}
-void lpt_disable_iclkip(struct drm_i915_private *dev_priv)
-{
- u32 temp;
-
- intel_de_write(dev_priv, PIXCLK_GATE, PIXCLK_GATE_GATE);
-
- mutex_lock(&dev_priv->sb_lock);
-
- temp = intel_sbi_read(dev_priv, SBI_SSCCTL6, SBI_ICLK);
- temp |= SBI_SSCCTL_DISABLE;
- intel_sbi_write(dev_priv, SBI_SSCCTL6, temp, SBI_ICLK);
-
- mutex_unlock(&dev_priv->sb_lock);
-}
-
-/* Program iCLKIP clock to the desired frequency */
-static void lpt_program_iclkip(const struct intel_crtc_state *crtc_state)
-{
- struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
- struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
- int clock = crtc_state->hw.adjusted_mode.crtc_clock;
- u32 divsel, phaseinc, auxdiv, phasedir = 0;
- u32 temp;
-
- lpt_disable_iclkip(dev_priv);
-
- /* The iCLK virtual clock root frequency is in MHz,
- * but the adjusted_mode->crtc_clock in in KHz. To get the
- * divisors, it is necessary to divide one by another, so we
- * convert the virtual clock precision to KHz here for higher
- * precision.
- */
- for (auxdiv = 0; auxdiv < 2; auxdiv++) {
- u32 iclk_virtual_root_freq = 172800 * 1000;
- u32 iclk_pi_range = 64;
- u32 desired_divisor;
-
- desired_divisor = DIV_ROUND_CLOSEST(iclk_virtual_root_freq,
- clock << auxdiv);
- divsel = (desired_divisor / iclk_pi_range) - 2;
- phaseinc = desired_divisor % iclk_pi_range;
-
- /*
- * Near 20MHz is a corner case which is
- * out of range for the 7-bit divisor
- */
- if (divsel <= 0x7f)
- break;
- }
-
- /* This should not happen with any sane values */
- drm_WARN_ON(&dev_priv->drm, SBI_SSCDIVINTPHASE_DIVSEL(divsel) &
- ~SBI_SSCDIVINTPHASE_DIVSEL_MASK);
- drm_WARN_ON(&dev_priv->drm, SBI_SSCDIVINTPHASE_DIR(phasedir) &
- ~SBI_SSCDIVINTPHASE_INCVAL_MASK);
-
- drm_dbg_kms(&dev_priv->drm,
- "iCLKIP clock: found settings for %dKHz refresh rate: auxdiv=%x, divsel=%x, phasedir=%x, phaseinc=%x\n",
- clock, auxdiv, divsel, phasedir, phaseinc);
-
- mutex_lock(&dev_priv->sb_lock);
-
- /* Program SSCDIVINTPHASE6 */
- temp = intel_sbi_read(dev_priv, SBI_SSCDIVINTPHASE6, SBI_ICLK);
- temp &= ~SBI_SSCDIVINTPHASE_DIVSEL_MASK;
- temp |= SBI_SSCDIVINTPHASE_DIVSEL(divsel);
- temp &= ~SBI_SSCDIVINTPHASE_INCVAL_MASK;
- temp |= SBI_SSCDIVINTPHASE_INCVAL(phaseinc);
- temp |= SBI_SSCDIVINTPHASE_DIR(phasedir);
- temp |= SBI_SSCDIVINTPHASE_PROPAGATE;
- intel_sbi_write(dev_priv, SBI_SSCDIVINTPHASE6, temp, SBI_ICLK);
-
- /* Program SSCAUXDIV */
- temp = intel_sbi_read(dev_priv, SBI_SSCAUXDIV6, SBI_ICLK);
- temp &= ~SBI_SSCAUXDIV_FINALDIV2SEL(1);
- temp |= SBI_SSCAUXDIV_FINALDIV2SEL(auxdiv);
- intel_sbi_write(dev_priv, SBI_SSCAUXDIV6, temp, SBI_ICLK);
-
- /* Enable modulator and associated divider */
- temp = intel_sbi_read(dev_priv, SBI_SSCCTL6, SBI_ICLK);
- temp &= ~SBI_SSCCTL_DISABLE;
- intel_sbi_write(dev_priv, SBI_SSCCTL6, temp, SBI_ICLK);
-
- mutex_unlock(&dev_priv->sb_lock);
-
- /* Wait for initialization time */
- udelay(24);
-
- intel_de_write(dev_priv, PIXCLK_GATE, PIXCLK_GATE_UNGATE);
-}
-
-int lpt_get_iclkip(struct drm_i915_private *dev_priv)
-{
- u32 divsel, phaseinc, auxdiv;
- u32 iclk_virtual_root_freq = 172800 * 1000;
- u32 iclk_pi_range = 64;
- u32 desired_divisor;
- u32 temp;
-
- if ((intel_de_read(dev_priv, PIXCLK_GATE) & PIXCLK_GATE_UNGATE) == 0)
- return 0;
-
- mutex_lock(&dev_priv->sb_lock);
-
- temp = intel_sbi_read(dev_priv, SBI_SSCCTL6, SBI_ICLK);
- if (temp & SBI_SSCCTL_DISABLE) {
- mutex_unlock(&dev_priv->sb_lock);
- return 0;
- }
-
- temp = intel_sbi_read(dev_priv, SBI_SSCDIVINTPHASE6, SBI_ICLK);
- divsel = (temp & SBI_SSCDIVINTPHASE_DIVSEL_MASK) >>
- SBI_SSCDIVINTPHASE_DIVSEL_SHIFT;
- phaseinc = (temp & SBI_SSCDIVINTPHASE_INCVAL_MASK) >>
- SBI_SSCDIVINTPHASE_INCVAL_SHIFT;
-
- temp = intel_sbi_read(dev_priv, SBI_SSCAUXDIV6, SBI_ICLK);
- auxdiv = (temp & SBI_SSCAUXDIV_FINALDIV2SEL_MASK) >>
- SBI_SSCAUXDIV_FINALDIV2SEL_SHIFT;
-
- mutex_unlock(&dev_priv->sb_lock);
-
- desired_divisor = (divsel + 2) * iclk_pi_range + phaseinc;
-
- return DIV_ROUND_CLOSEST(iclk_virtual_root_freq,
- desired_divisor << auxdiv);
-}
static void ilk_pch_transcoder_set_timings(const struct intel_crtc_state *crtc_state,
enum pipe pch_transcoder)
@@ -4299,414 +4172,6 @@ static bool i9xx_get_pipe_config(struct intel_crtc *crtc,
return ret;
}
-static void ilk_init_pch_refclk(struct drm_i915_private *dev_priv)
-{
- struct intel_encoder *encoder;
- int i;
- u32 val, final;
- bool has_lvds = false;
- bool has_cpu_edp = false;
- bool has_panel = false;
- bool has_ck505 = false;
- bool can_ssc = false;
- bool using_ssc_source = false;
-
- /* We need to take the global config into account */
- for_each_intel_encoder(&dev_priv->drm, encoder) {
- switch (encoder->type) {
- case INTEL_OUTPUT_LVDS:
- has_panel = true;
- has_lvds = true;
- break;
- case INTEL_OUTPUT_EDP:
- has_panel = true;
- if (encoder->port == PORT_A)
- has_cpu_edp = true;
- break;
- default:
- break;
- }
- }
-
- if (HAS_PCH_IBX(dev_priv)) {
- has_ck505 = dev_priv->vbt.display_clock_mode;
- can_ssc = has_ck505;
- } else {
- has_ck505 = false;
- can_ssc = true;
- }
-
- /* Check if any DPLLs are using the SSC source */
- for (i = 0; i < dev_priv->dpll.num_shared_dpll; i++) {
- u32 temp = intel_de_read(dev_priv, PCH_DPLL(i));
-
- if (!(temp & DPLL_VCO_ENABLE))
- continue;
-
- if ((temp & PLL_REF_INPUT_MASK) ==
- PLLB_REF_INPUT_SPREADSPECTRUMIN) {
- using_ssc_source = true;
- break;
- }
- }
-
- drm_dbg_kms(&dev_priv->drm,
- "has_panel %d has_lvds %d has_ck505 %d using_ssc_source %d\n",
- has_panel, has_lvds, has_ck505, using_ssc_source);
-
- /* Ironlake: try to setup display ref clock before DPLL
- * enabling. This is only under driver's control after
- * PCH B stepping, previous chipset stepping should be
- * ignoring this setting.
- */
- val = intel_de_read(dev_priv, PCH_DREF_CONTROL);
-
- /* As we must carefully and slowly disable/enable each source in turn,
- * compute the final state we want first and check if we need to
- * make any changes at all.
- */
- final = val;
- final &= ~DREF_NONSPREAD_SOURCE_MASK;
- if (has_ck505)
- final |= DREF_NONSPREAD_CK505_ENABLE;
- else
- final |= DREF_NONSPREAD_SOURCE_ENABLE;
-
- final &= ~DREF_SSC_SOURCE_MASK;
- final &= ~DREF_CPU_SOURCE_OUTPUT_MASK;
- final &= ~DREF_SSC1_ENABLE;
-
- if (has_panel) {
- final |= DREF_SSC_SOURCE_ENABLE;
-
- if (intel_panel_use_ssc(dev_priv) && can_ssc)
- final |= DREF_SSC1_ENABLE;
-
- if (has_cpu_edp) {
- if (intel_panel_use_ssc(dev_priv) && can_ssc)
- final |= DREF_CPU_SOURCE_OUTPUT_DOWNSPREAD;
- else
- final |= DREF_CPU_SOURCE_OUTPUT_NONSPREAD;
- } else
- final |= DREF_CPU_SOURCE_OUTPUT_DISABLE;
- } else if (using_ssc_source) {
- final |= DREF_SSC_SOURCE_ENABLE;
- final |= DREF_SSC1_ENABLE;
- }
-
- if (final == val)
- return;
-
- /* Always enable nonspread source */
- val &= ~DREF_NONSPREAD_SOURCE_MASK;
-
- if (has_ck505)
- val |= DREF_NONSPREAD_CK505_ENABLE;
- else
- val |= DREF_NONSPREAD_SOURCE_ENABLE;
-
- if (has_panel) {
- val &= ~DREF_SSC_SOURCE_MASK;
- val |= DREF_SSC_SOURCE_ENABLE;
-
- /* SSC must be turned on before enabling the CPU output */
- if (intel_panel_use_ssc(dev_priv) && can_ssc) {
- drm_dbg_kms(&dev_priv->drm, "Using SSC on panel\n");
- val |= DREF_SSC1_ENABLE;
- } else
- val &= ~DREF_SSC1_ENABLE;
-
- /* Get SSC going before enabling the outputs */
- intel_de_write(dev_priv, PCH_DREF_CONTROL, val);
- intel_de_posting_read(dev_priv, PCH_DREF_CONTROL);
- udelay(200);
-
- val &= ~DREF_CPU_SOURCE_OUTPUT_MASK;
-
- /* Enable CPU source on CPU attached eDP */
- if (has_cpu_edp) {
- if (intel_panel_use_ssc(dev_priv) && can_ssc) {
- drm_dbg_kms(&dev_priv->drm,
- "Using SSC on eDP\n");
- val |= DREF_CPU_SOURCE_OUTPUT_DOWNSPREAD;
- } else
- val |= DREF_CPU_SOURCE_OUTPUT_NONSPREAD;
- } else
- val |= DREF_CPU_SOURCE_OUTPUT_DISABLE;
-
- intel_de_write(dev_priv, PCH_DREF_CONTROL, val);
- intel_de_posting_read(dev_priv, PCH_DREF_CONTROL);
- udelay(200);
- } else {
- drm_dbg_kms(&dev_priv->drm, "Disabling CPU source output\n");
-
- val &= ~DREF_CPU_SOURCE_OUTPUT_MASK;
-
- /* Turn off CPU output */
- val |= DREF_CPU_SOURCE_OUTPUT_DISABLE;
-
- intel_de_write(dev_priv, PCH_DREF_CONTROL, val);
- intel_de_posting_read(dev_priv, PCH_DREF_CONTROL);
- udelay(200);
-
- if (!using_ssc_source) {
- drm_dbg_kms(&dev_priv->drm, "Disabling SSC source\n");
-
- /* Turn off the SSC source */
- val &= ~DREF_SSC_SOURCE_MASK;
- val |= DREF_SSC_SOURCE_DISABLE;
-
- /* Turn off SSC1 */
- val &= ~DREF_SSC1_ENABLE;
-
- intel_de_write(dev_priv, PCH_DREF_CONTROL, val);
- intel_de_posting_read(dev_priv, PCH_DREF_CONTROL);
- udelay(200);
- }
- }
-
- BUG_ON(val != final);
-}
-
-/* Implements 3 different sequences from BSpec chapter "Display iCLK
- * Programming" based on the parameters passed:
- * - Sequence to enable CLKOUT_DP
- * - Sequence to enable CLKOUT_DP without spread
- * - Sequence to enable CLKOUT_DP for FDI usage and configure PCH FDI I/O
- */
-static void lpt_enable_clkout_dp(struct drm_i915_private *dev_priv,
- bool with_spread, bool with_fdi)
-{
- u32 reg, tmp;
-
- if (drm_WARN(&dev_priv->drm, with_fdi && !with_spread,
- "FDI requires downspread\n"))
- with_spread = true;
- if (drm_WARN(&dev_priv->drm, HAS_PCH_LPT_LP(dev_priv) &&
- with_fdi, "LP PCH doesn't have FDI\n"))
- with_fdi = false;
-
- mutex_lock(&dev_priv->sb_lock);
-
- tmp = intel_sbi_read(dev_priv, SBI_SSCCTL, SBI_ICLK);
- tmp &= ~SBI_SSCCTL_DISABLE;
- tmp |= SBI_SSCCTL_PATHALT;
- intel_sbi_write(dev_priv, SBI_SSCCTL, tmp, SBI_ICLK);
-
- udelay(24);
-
- if (with_spread) {
- tmp = intel_sbi_read(dev_priv, SBI_SSCCTL, SBI_ICLK);
- tmp &= ~SBI_SSCCTL_PATHALT;
- intel_sbi_write(dev_priv, SBI_SSCCTL, tmp, SBI_ICLK);
-
- if (with_fdi)
- lpt_fdi_program_mphy(dev_priv);
- }
-
- reg = HAS_PCH_LPT_LP(dev_priv) ? SBI_GEN0 : SBI_DBUFF0;
- tmp = intel_sbi_read(dev_priv, reg, SBI_ICLK);
- tmp |= SBI_GEN0_CFG_BUFFENABLE_DISABLE;
- intel_sbi_write(dev_priv, reg, tmp, SBI_ICLK);
-
- mutex_unlock(&dev_priv->sb_lock);
-}
-
-/* Sequence to disable CLKOUT_DP */
-void lpt_disable_clkout_dp(struct drm_i915_private *dev_priv)
-{
- u32 reg, tmp;
-
- mutex_lock(&dev_priv->sb_lock);
-
- reg = HAS_PCH_LPT_LP(dev_priv) ? SBI_GEN0 : SBI_DBUFF0;
- tmp = intel_sbi_read(dev_priv, reg, SBI_ICLK);
- tmp &= ~SBI_GEN0_CFG_BUFFENABLE_DISABLE;
- intel_sbi_write(dev_priv, reg, tmp, SBI_ICLK);
-
- tmp = intel_sbi_read(dev_priv, SBI_SSCCTL, SBI_ICLK);
- if (!(tmp & SBI_SSCCTL_DISABLE)) {
- if (!(tmp & SBI_SSCCTL_PATHALT)) {
- tmp |= SBI_SSCCTL_PATHALT;
- intel_sbi_write(dev_priv, SBI_SSCCTL, tmp, SBI_ICLK);
- udelay(32);
- }
- tmp |= SBI_SSCCTL_DISABLE;
- intel_sbi_write(dev_priv, SBI_SSCCTL, tmp, SBI_ICLK);
- }
-
- mutex_unlock(&dev_priv->sb_lock);
-}
-
-#define BEND_IDX(steps) ((50 + (steps)) / 5)
-
-static const u16 sscdivintphase[] = {
- [BEND_IDX( 50)] = 0x3B23,
- [BEND_IDX( 45)] = 0x3B23,
- [BEND_IDX( 40)] = 0x3C23,
- [BEND_IDX( 35)] = 0x3C23,
- [BEND_IDX( 30)] = 0x3D23,
- [BEND_IDX( 25)] = 0x3D23,
- [BEND_IDX( 20)] = 0x3E23,
- [BEND_IDX( 15)] = 0x3E23,
- [BEND_IDX( 10)] = 0x3F23,
- [BEND_IDX( 5)] = 0x3F23,
- [BEND_IDX( 0)] = 0x0025,
- [BEND_IDX( -5)] = 0x0025,
- [BEND_IDX(-10)] = 0x0125,
- [BEND_IDX(-15)] = 0x0125,
- [BEND_IDX(-20)] = 0x0225,
- [BEND_IDX(-25)] = 0x0225,
- [BEND_IDX(-30)] = 0x0325,
- [BEND_IDX(-35)] = 0x0325,
- [BEND_IDX(-40)] = 0x0425,
- [BEND_IDX(-45)] = 0x0425,
- [BEND_IDX(-50)] = 0x0525,
-};
-
-/*
- * Bend CLKOUT_DP
- * steps -50 to 50 inclusive, in steps of 5
- * < 0 slow down the clock, > 0 speed up the clock, 0 == no bend (135MHz)
- * change in clock period = -(steps / 10) * 5.787 ps
- */
-static void lpt_bend_clkout_dp(struct drm_i915_private *dev_priv, int steps)
-{
- u32 tmp;
- int idx = BEND_IDX(steps);
-
- if (drm_WARN_ON(&dev_priv->drm, steps % 5 != 0))
- return;
-
- if (drm_WARN_ON(&dev_priv->drm, idx >= ARRAY_SIZE(sscdivintphase)))
- return;
-
- mutex_lock(&dev_priv->sb_lock);
-
- if (steps % 10 != 0)
- tmp = 0xAAAAAAAB;
- else
- tmp = 0x00000000;
- intel_sbi_write(dev_priv, SBI_SSCDITHPHASE, tmp, SBI_ICLK);
-
- tmp = intel_sbi_read(dev_priv, SBI_SSCDIVINTPHASE, SBI_ICLK);
- tmp &= 0xffff0000;
- tmp |= sscdivintphase[idx];
- intel_sbi_write(dev_priv, SBI_SSCDIVINTPHASE, tmp, SBI_ICLK);
-
- mutex_unlock(&dev_priv->sb_lock);
-}
-
-#undef BEND_IDX
-
-static bool spll_uses_pch_ssc(struct drm_i915_private *dev_priv)
-{
- u32 fuse_strap = intel_de_read(dev_priv, FUSE_STRAP);
- u32 ctl = intel_de_read(dev_priv, SPLL_CTL);
-
- if ((ctl & SPLL_PLL_ENABLE) == 0)
- return false;
-
- if ((ctl & SPLL_REF_MASK) == SPLL_REF_MUXED_SSC &&
- (fuse_strap & HSW_CPU_SSC_ENABLE) == 0)
- return true;
-
- if (IS_BROADWELL(dev_priv) &&
- (ctl & SPLL_REF_MASK) == SPLL_REF_PCH_SSC_BDW)
- return true;
-
- return false;
-}
-
-static bool wrpll_uses_pch_ssc(struct drm_i915_private *dev_priv,
- enum intel_dpll_id id)
-{
- u32 fuse_strap = intel_de_read(dev_priv, FUSE_STRAP);
- u32 ctl = intel_de_read(dev_priv, WRPLL_CTL(id));
-
- if ((ctl & WRPLL_PLL_ENABLE) == 0)
- return false;
-
- if ((ctl & WRPLL_REF_MASK) == WRPLL_REF_PCH_SSC)
- return true;
-
- if ((IS_BROADWELL(dev_priv) || IS_HSW_ULT(dev_priv)) &&
- (ctl & WRPLL_REF_MASK) == WRPLL_REF_MUXED_SSC_BDW &&
- (fuse_strap & HSW_CPU_SSC_ENABLE) == 0)
- return true;
-
- return false;
-}
-
-static void lpt_init_pch_refclk(struct drm_i915_private *dev_priv)
-{
- struct intel_encoder *encoder;
- bool has_fdi = false;
-
- for_each_intel_encoder(&dev_priv->drm, encoder) {
- switch (encoder->type) {
- case INTEL_OUTPUT_ANALOG:
- has_fdi = true;
- break;
- default:
- break;
- }
- }
-
- /*
- * The BIOS may have decided to use the PCH SSC
- * reference so we must not disable it until the
- * relevant PLLs have stopped relying on it. We'll
- * just leave the PCH SSC reference enabled in case
- * any active PLL is using it. It will get disabled
- * after runtime suspend if we don't have FDI.
- *
- * TODO: Move the whole reference clock handling
- * to the modeset sequence proper so that we can
- * actually enable/disable/reconfigure these things
- * safely. To do that we need to introduce a real
- * clock hierarchy. That would also allow us to do
- * clock bending finally.
- */
- dev_priv->pch_ssc_use = 0;
-
- if (spll_uses_pch_ssc(dev_priv)) {
- drm_dbg_kms(&dev_priv->drm, "SPLL using PCH SSC\n");
- dev_priv->pch_ssc_use |= BIT(DPLL_ID_SPLL);
- }
-
- if (wrpll_uses_pch_ssc(dev_priv, DPLL_ID_WRPLL1)) {
- drm_dbg_kms(&dev_priv->drm, "WRPLL1 using PCH SSC\n");
- dev_priv->pch_ssc_use |= BIT(DPLL_ID_WRPLL1);
- }
-
- if (wrpll_uses_pch_ssc(dev_priv, DPLL_ID_WRPLL2)) {
- drm_dbg_kms(&dev_priv->drm, "WRPLL2 using PCH SSC\n");
- dev_priv->pch_ssc_use |= BIT(DPLL_ID_WRPLL2);
- }
-
- if (dev_priv->pch_ssc_use)
- return;
-
- if (has_fdi) {
- lpt_bend_clkout_dp(dev_priv, 0);
- lpt_enable_clkout_dp(dev_priv, true, true);
- } else {
- lpt_disable_clkout_dp(dev_priv);
- }
-}
-
-/*
- * Initialize reference clocks when the driver loads
- */
-void intel_init_pch_refclk(struct drm_i915_private *dev_priv)
-{
- if (HAS_PCH_IBX(dev_priv) || HAS_PCH_CPT(dev_priv))
- ilk_init_pch_refclk(dev_priv);
- else if (HAS_PCH_LPT(dev_priv))
- lpt_init_pch_refclk(dev_priv);
-}
-
static void ilk_set_pipeconf(const struct intel_crtc_state *crtc_state)
{
struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
diff --git a/drivers/gpu/drm/i915/display/intel_display.h b/drivers/gpu/drm/i915/display/intel_display.h
index 0c76bf57f86b..39c18b8807f9 100644
--- a/drivers/gpu/drm/i915/display/intel_display.h
+++ b/drivers/gpu/drm/i915/display/intel_display.h
@@ -521,7 +521,6 @@ void intel_link_compute_m_n(u16 bpp, int nlanes,
int pixel_clock, int link_clock,
struct intel_link_m_n *m_n,
bool constant_n, bool fec_enable);
-void lpt_disable_clkout_dp(struct drm_i915_private *dev_priv);
u32 intel_plane_fb_max_stride(struct drm_i915_private *dev_priv,
u32 pixel_format, u64 modifier);
enum drm_mode_status
@@ -544,7 +543,6 @@ int vlv_get_cck_clock_hpll(struct drm_i915_private *dev_priv,
const char *name, u32 reg);
void lpt_pch_enable(const struct intel_crtc_state *crtc_state);
void lpt_disable_pch_transcoder(struct drm_i915_private *dev_priv);
-void lpt_disable_iclkip(struct drm_i915_private *dev_priv);
void intel_init_display_hooks(struct drm_i915_private *dev_priv);
unsigned int intel_fb_xy_to_linear(int x, int y,
const struct intel_plane_state *state,
@@ -583,7 +581,6 @@ intel_framebuffer_create(struct drm_i915_gem_object *obj,
void assert_pch_transcoder_disabled(struct drm_i915_private *dev_priv,
enum pipe pipe);
-int lpt_get_iclkip(struct drm_i915_private *dev_priv);
bool intel_fuzzy_clock_check(int clock1, int clock2);
void intel_display_prepare_reset(struct drm_i915_private *dev_priv);
@@ -632,7 +629,6 @@ void intel_modeset_driver_remove(struct drm_i915_private *i915);
void intel_modeset_driver_remove_noirq(struct drm_i915_private *i915);
void intel_modeset_driver_remove_nogem(struct drm_i915_private *i915);
void intel_display_resume(struct drm_device *dev);
-void intel_init_pch_refclk(struct drm_i915_private *dev_priv);
int intel_modeset_all_pipes(struct intel_atomic_state *state);
/* modesetting asserts */
diff --git a/drivers/gpu/drm/i915/display/intel_display_power.c b/drivers/gpu/drm/i915/display/intel_display_power.c
index 1672604f9ef7..d88da0d0f05a 100644
--- a/drivers/gpu/drm/i915/display/intel_display_power.c
+++ b/drivers/gpu/drm/i915/display/intel_display_power.c
@@ -15,6 +15,7 @@
#include "intel_dpio_phy.h"
#include "intel_dpll.h"
#include "intel_hotplug.h"
+#include "intel_pch_refclk.h"
#include "intel_pcode.h"
#include "intel_pm.h"
#include "intel_pps.h"
diff --git a/drivers/gpu/drm/i915/display/intel_dpll_mgr.c b/drivers/gpu/drm/i915/display/intel_dpll_mgr.c
index 0a7e04db04be..ca69b67bbc23 100644
--- a/drivers/gpu/drm/i915/display/intel_dpll_mgr.c
+++ b/drivers/gpu/drm/i915/display/intel_dpll_mgr.c
@@ -26,6 +26,7 @@
#include "intel_dpio_phy.h"
#include "intel_dpll.h"
#include "intel_dpll_mgr.h"
+#include "intel_pch_refclk.h"
#include "intel_tc.h"
/**
diff --git a/drivers/gpu/drm/i915/display/intel_fdi.c b/drivers/gpu/drm/i915/display/intel_fdi.c
index dd2cf0c59921..d1c1600c66cb 100644
--- a/drivers/gpu/drm/i915/display/intel_fdi.c
+++ b/drivers/gpu/drm/i915/display/intel_fdi.c
@@ -8,7 +8,6 @@
#include "intel_de.h"
#include "intel_display_types.h"
#include "intel_fdi.h"
-#include "intel_sbi.h"
static void assert_fdi_tx(struct drm_i915_private *dev_priv,
enum pipe pipe, bool state)
@@ -1006,104 +1005,6 @@ void ilk_fdi_disable(struct intel_crtc *crtc)
udelay(100);
}
-static void lpt_fdi_reset_mphy(struct drm_i915_private *dev_priv)
-{
- u32 tmp;
-
- tmp = intel_de_read(dev_priv, SOUTH_CHICKEN2);
- tmp |= FDI_MPHY_IOSFSB_RESET_CTL;
- intel_de_write(dev_priv, SOUTH_CHICKEN2, tmp);
-
- if (wait_for_us(intel_de_read(dev_priv, SOUTH_CHICKEN2) &
- FDI_MPHY_IOSFSB_RESET_STATUS, 100))
- drm_err(&dev_priv->drm, "FDI mPHY reset assert timeout\n");
-
- tmp = intel_de_read(dev_priv, SOUTH_CHICKEN2);
- tmp &= ~FDI_MPHY_IOSFSB_RESET_CTL;
- intel_de_write(dev_priv, SOUTH_CHICKEN2, tmp);
-
- if (wait_for_us((intel_de_read(dev_priv, SOUTH_CHICKEN2) &
- FDI_MPHY_IOSFSB_RESET_STATUS) == 0, 100))
- drm_err(&dev_priv->drm, "FDI mPHY reset de-assert timeout\n");
-}
-
-/* WaMPhyProgramming:hsw */
-void lpt_fdi_program_mphy(struct drm_i915_private *dev_priv)
-{
- u32 tmp;
-
- lpt_fdi_reset_mphy(dev_priv);
-
- tmp = intel_sbi_read(dev_priv, 0x8008, SBI_MPHY);
- tmp &= ~(0xFF << 24);
- tmp |= (0x12 << 24);
- intel_sbi_write(dev_priv, 0x8008, tmp, SBI_MPHY);
-
- tmp = intel_sbi_read(dev_priv, 0x2008, SBI_MPHY);
- tmp |= (1 << 11);
- intel_sbi_write(dev_priv, 0x2008, tmp, SBI_MPHY);
-
- tmp = intel_sbi_read(dev_priv, 0x2108, SBI_MPHY);
- tmp |= (1 << 11);
- intel_sbi_write(dev_priv, 0x2108, tmp, SBI_MPHY);
-
- tmp = intel_sbi_read(dev_priv, 0x206C, SBI_MPHY);
- tmp |= (1 << 24) | (1 << 21) | (1 << 18);
- intel_sbi_write(dev_priv, 0x206C, tmp, SBI_MPHY);
-
- tmp = intel_sbi_read(dev_priv, 0x216C, SBI_MPHY);
- tmp |= (1 << 24) | (1 << 21) | (1 << 18);
- intel_sbi_write(dev_priv, 0x216C, tmp, SBI_MPHY);
-
- tmp = intel_sbi_read(dev_priv, 0x2080, SBI_MPHY);
- tmp &= ~(7 << 13);
- tmp |= (5 << 13);
- intel_sbi_write(dev_priv, 0x2080, tmp, SBI_MPHY);
-
- tmp = intel_sbi_read(dev_priv, 0x2180, SBI_MPHY);
- tmp &= ~(7 << 13);
- tmp |= (5 << 13);
- intel_sbi_write(dev_priv, 0x2180, tmp, SBI_MPHY);
-
- tmp = intel_sbi_read(dev_priv, 0x208C, SBI_MPHY);
- tmp &= ~0xFF;
- tmp |= 0x1C;
- intel_sbi_write(dev_priv, 0x208C, tmp, SBI_MPHY);
-
- tmp = intel_sbi_read(dev_priv, 0x218C, SBI_MPHY);
- tmp &= ~0xFF;
- tmp |= 0x1C;
- intel_sbi_write(dev_priv, 0x218C, tmp, SBI_MPHY);
-
- tmp = intel_sbi_read(dev_priv, 0x2098, SBI_MPHY);
- tmp &= ~(0xFF << 16);
- tmp |= (0x1C << 16);
- intel_sbi_write(dev_priv, 0x2098, tmp, SBI_MPHY);
-
- tmp = intel_sbi_read(dev_priv, 0x2198, SBI_MPHY);
- tmp &= ~(0xFF << 16);
- tmp |= (0x1C << 16);
- intel_sbi_write(dev_priv, 0x2198, tmp, SBI_MPHY);
-
- tmp = intel_sbi_read(dev_priv, 0x20C4, SBI_MPHY);
- tmp |= (1 << 27);
- intel_sbi_write(dev_priv, 0x20C4, tmp, SBI_MPHY);
-
- tmp = intel_sbi_read(dev_priv, 0x21C4, SBI_MPHY);
- tmp |= (1 << 27);
- intel_sbi_write(dev_priv, 0x21C4, tmp, SBI_MPHY);
-
- tmp = intel_sbi_read(dev_priv, 0x20EC, SBI_MPHY);
- tmp &= ~(0xF << 28);
- tmp |= (4 << 28);
- intel_sbi_write(dev_priv, 0x20EC, tmp, SBI_MPHY);
-
- tmp = intel_sbi_read(dev_priv, 0x21EC, SBI_MPHY);
- tmp &= ~(0xF << 28);
- tmp |= (4 << 28);
- intel_sbi_write(dev_priv, 0x21EC, tmp, SBI_MPHY);
-}
-
static const struct intel_fdi_funcs ilk_funcs = {
.fdi_link_train = ilk_fdi_link_train,
};
diff --git a/drivers/gpu/drm/i915/display/intel_fdi.h b/drivers/gpu/drm/i915/display/intel_fdi.h
index 640d6585c137..5a361730f80a 100644
--- a/drivers/gpu/drm/i915/display/intel_fdi.h
+++ b/drivers/gpu/drm/i915/display/intel_fdi.h
@@ -24,7 +24,6 @@ void intel_fdi_init_hook(struct drm_i915_private *dev_priv);
void hsw_fdi_link_train(struct intel_encoder *encoder,
const struct intel_crtc_state *crtc_state);
void intel_fdi_pll_freq_update(struct drm_i915_private *i915);
-void lpt_fdi_program_mphy(struct drm_i915_private *i915);
void intel_fdi_link_train(struct intel_crtc *crtc,
const struct intel_crtc_state *crtc_state);
diff --git a/drivers/gpu/drm/i915/display/intel_pch_refclk.c b/drivers/gpu/drm/i915/display/intel_pch_refclk.c
new file mode 100644
index 000000000000..b688fd87e3da
--- /dev/null
+++ b/drivers/gpu/drm/i915/display/intel_pch_refclk.c
@@ -0,0 +1,648 @@
+// SPDX-License-Identifier: MIT
+/*
+ * Copyright © 2021 Intel Corporation
+ */
+
+#include "intel_de.h"
+#include "intel_display_types.h"
+#include "intel_panel.h"
+#include "intel_pch_refclk.h"
+#include "intel_sbi.h"
+
+static void lpt_fdi_reset_mphy(struct drm_i915_private *dev_priv)
+{
+ u32 tmp;
+
+ tmp = intel_de_read(dev_priv, SOUTH_CHICKEN2);
+ tmp |= FDI_MPHY_IOSFSB_RESET_CTL;
+ intel_de_write(dev_priv, SOUTH_CHICKEN2, tmp);
+
+ if (wait_for_us(intel_de_read(dev_priv, SOUTH_CHICKEN2) &
+ FDI_MPHY_IOSFSB_RESET_STATUS, 100))
+ drm_err(&dev_priv->drm, "FDI mPHY reset assert timeout\n");
+
+ tmp = intel_de_read(dev_priv, SOUTH_CHICKEN2);
+ tmp &= ~FDI_MPHY_IOSFSB_RESET_CTL;
+ intel_de_write(dev_priv, SOUTH_CHICKEN2, tmp);
+
+ if (wait_for_us((intel_de_read(dev_priv, SOUTH_CHICKEN2) &
+ FDI_MPHY_IOSFSB_RESET_STATUS) == 0, 100))
+ drm_err(&dev_priv->drm, "FDI mPHY reset de-assert timeout\n");
+}
+
+/* WaMPhyProgramming:hsw */
+static void lpt_fdi_program_mphy(struct drm_i915_private *dev_priv)
+{
+ u32 tmp;
+
+ lpt_fdi_reset_mphy(dev_priv);
+
+ tmp = intel_sbi_read(dev_priv, 0x8008, SBI_MPHY);
+ tmp &= ~(0xFF << 24);
+ tmp |= (0x12 << 24);
+ intel_sbi_write(dev_priv, 0x8008, tmp, SBI_MPHY);
+
+ tmp = intel_sbi_read(dev_priv, 0x2008, SBI_MPHY);
+ tmp |= (1 << 11);
+ intel_sbi_write(dev_priv, 0x2008, tmp, SBI_MPHY);
+
+ tmp = intel_sbi_read(dev_priv, 0x2108, SBI_MPHY);
+ tmp |= (1 << 11);
+ intel_sbi_write(dev_priv, 0x2108, tmp, SBI_MPHY);
+
+ tmp = intel_sbi_read(dev_priv, 0x206C, SBI_MPHY);
+ tmp |= (1 << 24) | (1 << 21) | (1 << 18);
+ intel_sbi_write(dev_priv, 0x206C, tmp, SBI_MPHY);
+
+ tmp = intel_sbi_read(dev_priv, 0x216C, SBI_MPHY);
+ tmp |= (1 << 24) | (1 << 21) | (1 << 18);
+ intel_sbi_write(dev_priv, 0x216C, tmp, SBI_MPHY);
+
+ tmp = intel_sbi_read(dev_priv, 0x2080, SBI_MPHY);
+ tmp &= ~(7 << 13);
+ tmp |= (5 << 13);
+ intel_sbi_write(dev_priv, 0x2080, tmp, SBI_MPHY);
+
+ tmp = intel_sbi_read(dev_priv, 0x2180, SBI_MPHY);
+ tmp &= ~(7 << 13);
+ tmp |= (5 << 13);
+ intel_sbi_write(dev_priv, 0x2180, tmp, SBI_MPHY);
+
+ tmp = intel_sbi_read(dev_priv, 0x208C, SBI_MPHY);
+ tmp &= ~0xFF;
+ tmp |= 0x1C;
+ intel_sbi_write(dev_priv, 0x208C, tmp, SBI_MPHY);
+
+ tmp = intel_sbi_read(dev_priv, 0x218C, SBI_MPHY);
+ tmp &= ~0xFF;
+ tmp |= 0x1C;
+ intel_sbi_write(dev_priv, 0x218C, tmp, SBI_MPHY);
+
+ tmp = intel_sbi_read(dev_priv, 0x2098, SBI_MPHY);
+ tmp &= ~(0xFF << 16);
+ tmp |= (0x1C << 16);
+ intel_sbi_write(dev_priv, 0x2098, tmp, SBI_MPHY);
+
+ tmp = intel_sbi_read(dev_priv, 0x2198, SBI_MPHY);
+ tmp &= ~(0xFF << 16);
+ tmp |= (0x1C << 16);
+ intel_sbi_write(dev_priv, 0x2198, tmp, SBI_MPHY);
+
+ tmp = intel_sbi_read(dev_priv, 0x20C4, SBI_MPHY);
+ tmp |= (1 << 27);
+ intel_sbi_write(dev_priv, 0x20C4, tmp, SBI_MPHY);
+
+ tmp = intel_sbi_read(dev_priv, 0x21C4, SBI_MPHY);
+ tmp |= (1 << 27);
+ intel_sbi_write(dev_priv, 0x21C4, tmp, SBI_MPHY);
+
+ tmp = intel_sbi_read(dev_priv, 0x20EC, SBI_MPHY);
+ tmp &= ~(0xF << 28);
+ tmp |= (4 << 28);
+ intel_sbi_write(dev_priv, 0x20EC, tmp, SBI_MPHY);
+
+ tmp = intel_sbi_read(dev_priv, 0x21EC, SBI_MPHY);
+ tmp &= ~(0xF << 28);
+ tmp |= (4 << 28);
+ intel_sbi_write(dev_priv, 0x21EC, tmp, SBI_MPHY);
+}
+
+void lpt_disable_iclkip(struct drm_i915_private *dev_priv)
+{
+ u32 temp;
+
+ intel_de_write(dev_priv, PIXCLK_GATE, PIXCLK_GATE_GATE);
+
+ mutex_lock(&dev_priv->sb_lock);
+
+ temp = intel_sbi_read(dev_priv, SBI_SSCCTL6, SBI_ICLK);
+ temp |= SBI_SSCCTL_DISABLE;
+ intel_sbi_write(dev_priv, SBI_SSCCTL6, temp, SBI_ICLK);
+
+ mutex_unlock(&dev_priv->sb_lock);
+}
+
+/* Program iCLKIP clock to the desired frequency */
+void lpt_program_iclkip(const struct intel_crtc_state *crtc_state)
+{
+ struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
+ struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+ int clock = crtc_state->hw.adjusted_mode.crtc_clock;
+ u32 divsel, phaseinc, auxdiv, phasedir = 0;
+ u32 temp;
+
+ lpt_disable_iclkip(dev_priv);
+
+ /* The iCLK virtual clock root frequency is in MHz,
+ * but the adjusted_mode->crtc_clock in KHz. To get the
+ * divisors, it is necessary to divide one by another, so we
+ * convert the virtual clock precision to KHz here for higher
+ * precision.
+ */
+ for (auxdiv = 0; auxdiv < 2; auxdiv++) {
+ u32 iclk_virtual_root_freq = 172800 * 1000;
+ u32 iclk_pi_range = 64;
+ u32 desired_divisor;
+
+ desired_divisor = DIV_ROUND_CLOSEST(iclk_virtual_root_freq,
+ clock << auxdiv);
+ divsel = (desired_divisor / iclk_pi_range) - 2;
+ phaseinc = desired_divisor % iclk_pi_range;
+
+ /*
+ * Near 20MHz is a corner case which is
+ * out of range for the 7-bit divisor
+ */
+ if (divsel <= 0x7f)
+ break;
+ }
+
+ /* This should not happen with any sane values */
+ drm_WARN_ON(&dev_priv->drm, SBI_SSCDIVINTPHASE_DIVSEL(divsel) &
+ ~SBI_SSCDIVINTPHASE_DIVSEL_MASK);
+ drm_WARN_ON(&dev_priv->drm, SBI_SSCDIVINTPHASE_DIR(phasedir) &
+ ~SBI_SSCDIVINTPHASE_INCVAL_MASK);
+
+ drm_dbg_kms(&dev_priv->drm,
+ "iCLKIP clock: found settings for %dKHz refresh rate: auxdiv=%x, divsel=%x, phasedir=%x, phaseinc=%x\n",
+ clock, auxdiv, divsel, phasedir, phaseinc);
+
+ mutex_lock(&dev_priv->sb_lock);
+
+ /* Program SSCDIVINTPHASE6 */
+ temp = intel_sbi_read(dev_priv, SBI_SSCDIVINTPHASE6, SBI_ICLK);
+ temp &= ~SBI_SSCDIVINTPHASE_DIVSEL_MASK;
+ temp |= SBI_SSCDIVINTPHASE_DIVSEL(divsel);
+ temp &= ~SBI_SSCDIVINTPHASE_INCVAL_MASK;
+ temp |= SBI_SSCDIVINTPHASE_INCVAL(phaseinc);
+ temp |= SBI_SSCDIVINTPHASE_DIR(phasedir);
+ temp |= SBI_SSCDIVINTPHASE_PROPAGATE;
+ intel_sbi_write(dev_priv, SBI_SSCDIVINTPHASE6, temp, SBI_ICLK);
+
+ /* Program SSCAUXDIV */
+ temp = intel_sbi_read(dev_priv, SBI_SSCAUXDIV6, SBI_ICLK);
+ temp &= ~SBI_SSCAUXDIV_FINALDIV2SEL(1);
+ temp |= SBI_SSCAUXDIV_FINALDIV2SEL(auxdiv);
+ intel_sbi_write(dev_priv, SBI_SSCAUXDIV6, temp, SBI_ICLK);
+
+ /* Enable modulator and associated divider */
+ temp = intel_sbi_read(dev_priv, SBI_SSCCTL6, SBI_ICLK);
+ temp &= ~SBI_SSCCTL_DISABLE;
+ intel_sbi_write(dev_priv, SBI_SSCCTL6, temp, SBI_ICLK);
+
+ mutex_unlock(&dev_priv->sb_lock);
+
+ /* Wait for initialization time */
+ udelay(24);
+
+ intel_de_write(dev_priv, PIXCLK_GATE, PIXCLK_GATE_UNGATE);
+}
+
+int lpt_get_iclkip(struct drm_i915_private *dev_priv)
+{
+ u32 divsel, phaseinc, auxdiv;
+ u32 iclk_virtual_root_freq = 172800 * 1000;
+ u32 iclk_pi_range = 64;
+ u32 desired_divisor;
+ u32 temp;
+
+ if ((intel_de_read(dev_priv, PIXCLK_GATE) & PIXCLK_GATE_UNGATE) == 0)
+ return 0;
+
+ mutex_lock(&dev_priv->sb_lock);
+
+ temp = intel_sbi_read(dev_priv, SBI_SSCCTL6, SBI_ICLK);
+ if (temp & SBI_SSCCTL_DISABLE) {
+ mutex_unlock(&dev_priv->sb_lock);
+ return 0;
+ }
+
+ temp = intel_sbi_read(dev_priv, SBI_SSCDIVINTPHASE6, SBI_ICLK);
+ divsel = (temp & SBI_SSCDIVINTPHASE_DIVSEL_MASK) >>
+ SBI_SSCDIVINTPHASE_DIVSEL_SHIFT;
+ phaseinc = (temp & SBI_SSCDIVINTPHASE_INCVAL_MASK) >>
+ SBI_SSCDIVINTPHASE_INCVAL_SHIFT;
+
+ temp = intel_sbi_read(dev_priv, SBI_SSCAUXDIV6, SBI_ICLK);
+ auxdiv = (temp & SBI_SSCAUXDIV_FINALDIV2SEL_MASK) >>
+ SBI_SSCAUXDIV_FINALDIV2SEL_SHIFT;
+
+ mutex_unlock(&dev_priv->sb_lock);
+
+ desired_divisor = (divsel + 2) * iclk_pi_range + phaseinc;
+
+ return DIV_ROUND_CLOSEST(iclk_virtual_root_freq,
+ desired_divisor << auxdiv);
+}
+
+/* Implements 3 different sequences from BSpec chapter "Display iCLK
+ * Programming" based on the parameters passed:
+ * - Sequence to enable CLKOUT_DP
+ * - Sequence to enable CLKOUT_DP without spread
+ * - Sequence to enable CLKOUT_DP for FDI usage and configure PCH FDI I/O
+ */
+static void lpt_enable_clkout_dp(struct drm_i915_private *dev_priv,
+ bool with_spread, bool with_fdi)
+{
+ u32 reg, tmp;
+
+ if (drm_WARN(&dev_priv->drm, with_fdi && !with_spread,
+ "FDI requires downspread\n"))
+ with_spread = true;
+ if (drm_WARN(&dev_priv->drm, HAS_PCH_LPT_LP(dev_priv) &&
+ with_fdi, "LP PCH doesn't have FDI\n"))
+ with_fdi = false;
+
+ mutex_lock(&dev_priv->sb_lock);
+
+ tmp = intel_sbi_read(dev_priv, SBI_SSCCTL, SBI_ICLK);
+ tmp &= ~SBI_SSCCTL_DISABLE;
+ tmp |= SBI_SSCCTL_PATHALT;
+ intel_sbi_write(dev_priv, SBI_SSCCTL, tmp, SBI_ICLK);
+
+ udelay(24);
+
+ if (with_spread) {
+ tmp = intel_sbi_read(dev_priv, SBI_SSCCTL, SBI_ICLK);
+ tmp &= ~SBI_SSCCTL_PATHALT;
+ intel_sbi_write(dev_priv, SBI_SSCCTL, tmp, SBI_ICLK);
+
+ if (with_fdi)
+ lpt_fdi_program_mphy(dev_priv);
+ }
+
+ reg = HAS_PCH_LPT_LP(dev_priv) ? SBI_GEN0 : SBI_DBUFF0;
+ tmp = intel_sbi_read(dev_priv, reg, SBI_ICLK);
+ tmp |= SBI_GEN0_CFG_BUFFENABLE_DISABLE;
+ intel_sbi_write(dev_priv, reg, tmp, SBI_ICLK);
+
+ mutex_unlock(&dev_priv->sb_lock);
+}
+
+/* Sequence to disable CLKOUT_DP */
+void lpt_disable_clkout_dp(struct drm_i915_private *dev_priv)
+{
+ u32 reg, tmp;
+
+ mutex_lock(&dev_priv->sb_lock);
+
+ reg = HAS_PCH_LPT_LP(dev_priv) ? SBI_GEN0 : SBI_DBUFF0;
+ tmp = intel_sbi_read(dev_priv, reg, SBI_ICLK);
+ tmp &= ~SBI_GEN0_CFG_BUFFENABLE_DISABLE;
+ intel_sbi_write(dev_priv, reg, tmp, SBI_ICLK);
+
+ tmp = intel_sbi_read(dev_priv, SBI_SSCCTL, SBI_ICLK);
+ if (!(tmp & SBI_SSCCTL_DISABLE)) {
+ if (!(tmp & SBI_SSCCTL_PATHALT)) {
+ tmp |= SBI_SSCCTL_PATHALT;
+ intel_sbi_write(dev_priv, SBI_SSCCTL, tmp, SBI_ICLK);
+ udelay(32);
+ }
+ tmp |= SBI_SSCCTL_DISABLE;
+ intel_sbi_write(dev_priv, SBI_SSCCTL, tmp, SBI_ICLK);
+ }
+
+ mutex_unlock(&dev_priv->sb_lock);
+}
+
+#define BEND_IDX(steps) ((50 + (steps)) / 5)
+
+static const u16 sscdivintphase[] = {
+ [BEND_IDX( 50)] = 0x3B23,
+ [BEND_IDX( 45)] = 0x3B23,
+ [BEND_IDX( 40)] = 0x3C23,
+ [BEND_IDX( 35)] = 0x3C23,
+ [BEND_IDX( 30)] = 0x3D23,
+ [BEND_IDX( 25)] = 0x3D23,
+ [BEND_IDX( 20)] = 0x3E23,
+ [BEND_IDX( 15)] = 0x3E23,
+ [BEND_IDX( 10)] = 0x3F23,
+ [BEND_IDX( 5)] = 0x3F23,
+ [BEND_IDX( 0)] = 0x0025,
+ [BEND_IDX( -5)] = 0x0025,
+ [BEND_IDX(-10)] = 0x0125,
+ [BEND_IDX(-15)] = 0x0125,
+ [BEND_IDX(-20)] = 0x0225,
+ [BEND_IDX(-25)] = 0x0225,
+ [BEND_IDX(-30)] = 0x0325,
+ [BEND_IDX(-35)] = 0x0325,
+ [BEND_IDX(-40)] = 0x0425,
+ [BEND_IDX(-45)] = 0x0425,
+ [BEND_IDX(-50)] = 0x0525,
+};
+
+/*
+ * Bend CLKOUT_DP
+ * steps -50 to 50 inclusive, in steps of 5
+ * < 0 slow down the clock, > 0 speed up the clock, 0 == no bend (135MHz)
+ * change in clock period = -(steps / 10) * 5.787 ps
+ */
+static void lpt_bend_clkout_dp(struct drm_i915_private *dev_priv, int steps)
+{
+ u32 tmp;
+ int idx = BEND_IDX(steps);
+
+ if (drm_WARN_ON(&dev_priv->drm, steps % 5 != 0))
+ return;
+
+ if (drm_WARN_ON(&dev_priv->drm, idx >= ARRAY_SIZE(sscdivintphase)))
+ return;
+
+ mutex_lock(&dev_priv->sb_lock);
+
+ if (steps % 10 != 0)
+ tmp = 0xAAAAAAAB;
+ else
+ tmp = 0x00000000;
+ intel_sbi_write(dev_priv, SBI_SSCDITHPHASE, tmp, SBI_ICLK);
+
+ tmp = intel_sbi_read(dev_priv, SBI_SSCDIVINTPHASE, SBI_ICLK);
+ tmp &= 0xffff0000;
+ tmp |= sscdivintphase[idx];
+ intel_sbi_write(dev_priv, SBI_SSCDIVINTPHASE, tmp, SBI_ICLK);
+
+ mutex_unlock(&dev_priv->sb_lock);
+}
+
+#undef BEND_IDX
+
+static bool spll_uses_pch_ssc(struct drm_i915_private *dev_priv)
+{
+ u32 fuse_strap = intel_de_read(dev_priv, FUSE_STRAP);
+ u32 ctl = intel_de_read(dev_priv, SPLL_CTL);
+
+ if ((ctl & SPLL_PLL_ENABLE) == 0)
+ return false;
+
+ if ((ctl & SPLL_REF_MASK) == SPLL_REF_MUXED_SSC &&
+ (fuse_strap & HSW_CPU_SSC_ENABLE) == 0)
+ return true;
+
+ if (IS_BROADWELL(dev_priv) &&
+ (ctl & SPLL_REF_MASK) == SPLL_REF_PCH_SSC_BDW)
+ return true;
+
+ return false;
+}
+
+static bool wrpll_uses_pch_ssc(struct drm_i915_private *dev_priv,
+ enum intel_dpll_id id)
+{
+ u32 fuse_strap = intel_de_read(dev_priv, FUSE_STRAP);
+ u32 ctl = intel_de_read(dev_priv, WRPLL_CTL(id));
+
+ if ((ctl & WRPLL_PLL_ENABLE) == 0)
+ return false;
+
+ if ((ctl & WRPLL_REF_MASK) == WRPLL_REF_PCH_SSC)
+ return true;
+
+ if ((IS_BROADWELL(dev_priv) || IS_HSW_ULT(dev_priv)) &&
+ (ctl & WRPLL_REF_MASK) == WRPLL_REF_MUXED_SSC_BDW &&
+ (fuse_strap & HSW_CPU_SSC_ENABLE) == 0)
+ return true;
+
+ return false;
+}
+
+static void lpt_init_pch_refclk(struct drm_i915_private *dev_priv)
+{
+ struct intel_encoder *encoder;
+ bool has_fdi = false;
+
+ for_each_intel_encoder(&dev_priv->drm, encoder) {
+ switch (encoder->type) {
+ case INTEL_OUTPUT_ANALOG:
+ has_fdi = true;
+ break;
+ default:
+ break;
+ }
+ }
+
+ /*
+ * The BIOS may have decided to use the PCH SSC
+ * reference so we must not disable it until the
+ * relevant PLLs have stopped relying on it. We'll
+ * just leave the PCH SSC reference enabled in case
+ * any active PLL is using it. It will get disabled
+ * after runtime suspend if we don't have FDI.
+ *
+ * TODO: Move the whole reference clock handling
+ * to the modeset sequence proper so that we can
+ * actually enable/disable/reconfigure these things
+ * safely. To do that we need to introduce a real
+ * clock hierarchy. That would also allow us to do
+ * clock bending finally.
+ */
+ dev_priv->pch_ssc_use = 0;
+
+ if (spll_uses_pch_ssc(dev_priv)) {
+ drm_dbg_kms(&dev_priv->drm, "SPLL using PCH SSC\n");
+ dev_priv->pch_ssc_use |= BIT(DPLL_ID_SPLL);
+ }
+
+ if (wrpll_uses_pch_ssc(dev_priv, DPLL_ID_WRPLL1)) {
+ drm_dbg_kms(&dev_priv->drm, "WRPLL1 using PCH SSC\n");
+ dev_priv->pch_ssc_use |= BIT(DPLL_ID_WRPLL1);
+ }
+
+ if (wrpll_uses_pch_ssc(dev_priv, DPLL_ID_WRPLL2)) {
+ drm_dbg_kms(&dev_priv->drm, "WRPLL2 using PCH SSC\n");
+ dev_priv->pch_ssc_use |= BIT(DPLL_ID_WRPLL2);
+ }
+
+ if (dev_priv->pch_ssc_use)
+ return;
+
+ if (has_fdi) {
+ lpt_bend_clkout_dp(dev_priv, 0);
+ lpt_enable_clkout_dp(dev_priv, true, true);
+ } else {
+ lpt_disable_clkout_dp(dev_priv);
+ }
+}
+
+static void ilk_init_pch_refclk(struct drm_i915_private *dev_priv)
+{
+ struct intel_encoder *encoder;
+ int i;
+ u32 val, final;
+ bool has_lvds = false;
+ bool has_cpu_edp = false;
+ bool has_panel = false;
+ bool has_ck505 = false;
+ bool can_ssc = false;
+ bool using_ssc_source = false;
+
+ /* We need to take the global config into account */
+ for_each_intel_encoder(&dev_priv->drm, encoder) {
+ switch (encoder->type) {
+ case INTEL_OUTPUT_LVDS:
+ has_panel = true;
+ has_lvds = true;
+ break;
+ case INTEL_OUTPUT_EDP:
+ has_panel = true;
+ if (encoder->port == PORT_A)
+ has_cpu_edp = true;
+ break;
+ default:
+ break;
+ }
+ }
+
+ if (HAS_PCH_IBX(dev_priv)) {
+ has_ck505 = dev_priv->vbt.display_clock_mode;
+ can_ssc = has_ck505;
+ } else {
+ has_ck505 = false;
+ can_ssc = true;
+ }
+
+ /* Check if any DPLLs are using the SSC source */
+ for (i = 0; i < dev_priv->dpll.num_shared_dpll; i++) {
+ u32 temp = intel_de_read(dev_priv, PCH_DPLL(i));
+
+ if (!(temp & DPLL_VCO_ENABLE))
+ continue;
+
+ if ((temp & PLL_REF_INPUT_MASK) ==
+ PLLB_REF_INPUT_SPREADSPECTRUMIN) {
+ using_ssc_source = true;
+ break;
+ }
+ }
+
+ drm_dbg_kms(&dev_priv->drm,
+ "has_panel %d has_lvds %d has_ck505 %d using_ssc_source %d\n",
+ has_panel, has_lvds, has_ck505, using_ssc_source);
+
+ /* Ironlake: try to setup display ref clock before DPLL
+ * enabling. This is only under driver's control after
+ * PCH B stepping, previous chipset stepping should be
+ * ignoring this setting.
+ */
+ val = intel_de_read(dev_priv, PCH_DREF_CONTROL);
+
+ /* As we must carefully and slowly disable/enable each source in turn,
+ * compute the final state we want first and check if we need to
+ * make any changes at all.
+ */
+ final = val;
+ final &= ~DREF_NONSPREAD_SOURCE_MASK;
+ if (has_ck505)
+ final |= DREF_NONSPREAD_CK505_ENABLE;
+ else
+ final |= DREF_NONSPREAD_SOURCE_ENABLE;
+
+ final &= ~DREF_SSC_SOURCE_MASK;
+ final &= ~DREF_CPU_SOURCE_OUTPUT_MASK;
+ final &= ~DREF_SSC1_ENABLE;
+
+ if (has_panel) {
+ final |= DREF_SSC_SOURCE_ENABLE;
+
+ if (intel_panel_use_ssc(dev_priv) && can_ssc)
+ final |= DREF_SSC1_ENABLE;
+
+ if (has_cpu_edp) {
+ if (intel_panel_use_ssc(dev_priv) && can_ssc)
+ final |= DREF_CPU_SOURCE_OUTPUT_DOWNSPREAD;
+ else
+ final |= DREF_CPU_SOURCE_OUTPUT_NONSPREAD;
+ } else {
+ final |= DREF_CPU_SOURCE_OUTPUT_DISABLE;
+ }
+ } else if (using_ssc_source) {
+ final |= DREF_SSC_SOURCE_ENABLE;
+ final |= DREF_SSC1_ENABLE;
+ }
+
+ if (final == val)
+ return;
+
+ /* Always enable nonspread source */
+ val &= ~DREF_NONSPREAD_SOURCE_MASK;
+
+ if (has_ck505)
+ val |= DREF_NONSPREAD_CK505_ENABLE;
+ else
+ val |= DREF_NONSPREAD_SOURCE_ENABLE;
+
+ if (has_panel) {
+ val &= ~DREF_SSC_SOURCE_MASK;
+ val |= DREF_SSC_SOURCE_ENABLE;
+
+ /* SSC must be turned on before enabling the CPU output */
+ if (intel_panel_use_ssc(dev_priv) && can_ssc) {
+ drm_dbg_kms(&dev_priv->drm, "Using SSC on panel\n");
+ val |= DREF_SSC1_ENABLE;
+ } else {
+ val &= ~DREF_SSC1_ENABLE;
+ }
+
+ /* Get SSC going before enabling the outputs */
+ intel_de_write(dev_priv, PCH_DREF_CONTROL, val);
+ intel_de_posting_read(dev_priv, PCH_DREF_CONTROL);
+ udelay(200);
+
+ val &= ~DREF_CPU_SOURCE_OUTPUT_MASK;
+
+ /* Enable CPU source on CPU attached eDP */
+ if (has_cpu_edp) {
+ if (intel_panel_use_ssc(dev_priv) && can_ssc) {
+ drm_dbg_kms(&dev_priv->drm,
+ "Using SSC on eDP\n");
+ val |= DREF_CPU_SOURCE_OUTPUT_DOWNSPREAD;
+ } else {
+ val |= DREF_CPU_SOURCE_OUTPUT_NONSPREAD;
+ }
+ } else {
+ val |= DREF_CPU_SOURCE_OUTPUT_DISABLE;
+ }
+
+ intel_de_write(dev_priv, PCH_DREF_CONTROL, val);
+ intel_de_posting_read(dev_priv, PCH_DREF_CONTROL);
+ udelay(200);
+ } else {
+ drm_dbg_kms(&dev_priv->drm, "Disabling CPU source output\n");
+
+ val &= ~DREF_CPU_SOURCE_OUTPUT_MASK;
+
+ /* Turn off CPU output */
+ val |= DREF_CPU_SOURCE_OUTPUT_DISABLE;
+
+ intel_de_write(dev_priv, PCH_DREF_CONTROL, val);
+ intel_de_posting_read(dev_priv, PCH_DREF_CONTROL);
+ udelay(200);
+
+ if (!using_ssc_source) {
+ drm_dbg_kms(&dev_priv->drm, "Disabling SSC source\n");
+
+ /* Turn off the SSC source */
+ val &= ~DREF_SSC_SOURCE_MASK;
+ val |= DREF_SSC_SOURCE_DISABLE;
+
+ /* Turn off SSC1 */
+ val &= ~DREF_SSC1_ENABLE;
+
+ intel_de_write(dev_priv, PCH_DREF_CONTROL, val);
+ intel_de_posting_read(dev_priv, PCH_DREF_CONTROL);
+ udelay(200);
+ }
+ }
+
+ BUG_ON(val != final);
+}
+
+/*
+ * Initialize reference clocks when the driver loads
+ */
+void intel_init_pch_refclk(struct drm_i915_private *dev_priv)
+{
+ if (HAS_PCH_IBX(dev_priv) || HAS_PCH_CPT(dev_priv))
+ ilk_init_pch_refclk(dev_priv);
+ else if (HAS_PCH_LPT(dev_priv))
+ lpt_init_pch_refclk(dev_priv);
+}
diff --git a/drivers/gpu/drm/i915/display/intel_pch_refclk.h b/drivers/gpu/drm/i915/display/intel_pch_refclk.h
new file mode 100644
index 000000000000..12ab2c75a800
--- /dev/null
+++ b/drivers/gpu/drm/i915/display/intel_pch_refclk.h
@@ -0,0 +1,21 @@
+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright © 2021 Intel Corporation
+ */
+
+#ifndef _INTEL_PCH_REFCLK_H_
+#define _INTEL_PCH_REFCLK_H_
+
+#include <linux/types.h>
+
+struct drm_i915_private;
+struct intel_crtc_state;
+
+void lpt_program_iclkip(const struct intel_crtc_state *crtc_state);
+void lpt_disable_iclkip(struct drm_i915_private *dev_priv);
+int lpt_get_iclkip(struct drm_i915_private *dev_priv);
+
+void intel_init_pch_refclk(struct drm_i915_private *dev_priv);
+void lpt_disable_clkout_dp(struct drm_i915_private *dev_priv);
+
+#endif
diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
index b18a250e5d2e..1e5b75ae9932 100644
--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -54,6 +54,7 @@
#include "display/intel_fbdev.h"
#include "display/intel_hotplug.h"
#include "display/intel_overlay.h"
+#include "display/intel_pch_refclk.h"
#include "display/intel_pipe_crc.h"
#include "display/intel_pps.h"
#include "display/intel_sprite.h"
--
2.32.0
