From: Rodrigo Vivi Date: Tue, 5 Sep 2017 19:30:13 +0000 (-0700) Subject: drm/i915: Display WA #1133 WaFbcSkipSegments:cnl, glk X-Git-Tag: microblaze-4.16-rc1~239^2~61^2~3 X-Git-Url: http://git.monstr.eu/?a=commitdiff_plain;h=8f067837c4b7;p=linux-2.6-microblaze.git drm/i915: Display WA #1133 WaFbcSkipSegments:cnl, glk Skip compressing 1 segment at the end of the frame, avoid a pixel count mismatch nuke event when last active pixel and dummy pixel has same color for Odd Plane Width / Height. For both platforms Gemini Lake and Cannon Lake. v2: Use function-like macro and also use mask to clean to make sure bit 11 is 0. (Suggested by Paulo). v3: Add Display WA notation and also apply for GLK. Both Forgotten on v2. Using "GLK_" prefix since GLK came before CNL. v4: Forgot to "|=" when moving directly macro to masked val. (Noticed by Paulo.) v5: Rebased on top of 0a46ddd57c9e ("drm/i915/cnp: Wa 1181: Fix Backlight issue") Cc: Imre Deak Cc: Paulo Zanoni Signed-off-by: Rodrigo Vivi Reviewed-by: Paulo Zanoni Link: https://patchwork.freedesktop.org/patch/msgid/20170905193013.31710-1-rodrigo.vivi@intel.com --- diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index 5651081ff789..1878c4967529 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -2940,6 +2940,9 @@ enum i915_power_well_id { #define ILK_DPFC_CHICKEN _MMIO(0x43224) #define ILK_DPFC_DISABLE_DUMMY0 (1<<8) #define ILK_DPFC_NUKE_ON_ANY_MODIFICATION (1<<23) +#define GLK_SKIP_SEG_EN (1<<12) +#define GLK_SKIP_SEG_COUNT_MASK (3<<10) +#define GLK_SKIP_SEG_COUNT(x) ((x)<<10) #define ILK_FBC_RT_BASE _MMIO(0x2128) #define ILK_FBC_RT_VALID (1<<0) #define SNB_FBC_FRONT_BUFFER (1<<1) diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c index f5d77b131b58..0201816a4229 100644 --- a/drivers/gpu/drm/i915/intel_pm.c +++ b/drivers/gpu/drm/i915/intel_pm.c @@ -125,6 +125,7 @@ static void bxt_init_clock_gating(struct drm_i915_private *dev_priv) static void glk_init_clock_gating(struct drm_i915_private *dev_priv) { + u32 val; gen9_init_clock_gating(dev_priv); /* @@ -144,6 +145,11 @@ static void glk_init_clock_gating(struct drm_i915_private *dev_priv) I915_WRITE(CHICKEN_MISC_2, val); } + /* Display WA #1133: WaFbcSkipSegments:glk */ + val = I915_READ(ILK_DPFC_CHICKEN); + val &= ~GLK_SKIP_SEG_COUNT_MASK; + val |= GLK_SKIP_SEG_EN | GLK_SKIP_SEG_COUNT(1); + I915_WRITE(ILK_DPFC_CHICKEN, val); } static void i915_pineview_get_mem_freq(struct drm_i915_private *dev_priv) @@ -8275,6 +8281,7 @@ static void cnp_init_clock_gating(struct drm_i915_private *dev_priv) static void cnl_init_clock_gating(struct drm_i915_private *dev_priv) { + u32 val; cnp_init_clock_gating(dev_priv); /* This is not an Wa. Enable for better image quality */ @@ -8294,6 +8301,12 @@ static void cnl_init_clock_gating(struct drm_i915_private *dev_priv) I915_WRITE(SLICE_UNIT_LEVEL_CLKGATE, I915_READ(SLICE_UNIT_LEVEL_CLKGATE) | SARBUNIT_CLKGATE_DIS); + + /* Display WA #1133: WaFbcSkipSegments:cnl */ + val = I915_READ(ILK_DPFC_CHICKEN); + val &= ~GLK_SKIP_SEG_COUNT_MASK; + val |= GLK_SKIP_SEG_EN | GLK_SKIP_SEG_COUNT(1); + I915_WRITE(ILK_DPFC_CHICKEN, val); } static void cfl_init_clock_gating(struct drm_i915_private *dev_priv)