Em Ter, 2017-09-05 às 11:05 -0700, Rodrigo Vivi escreveu:
> 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.
>
> Cc: Imre Deak <imre.deak@xxxxxxxxx>
> Cc: Paulo Zanoni <paulo.r.zanoni@xxxxxxxxx>
> Signed-off-by: Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx>
> ---
> drivers/gpu/drm/i915/i915_reg.h | 3 +++
> drivers/gpu/drm/i915/intel_pm.c | 14 ++++++++++++++
> 2 files changed, 17 insertions(+)
>
> diff --git a/drivers/gpu/drm/i915/i915_reg.h
> b/drivers/gpu/drm/i915/i915_reg.h
> index c718c2f2eaeb..fbf824b6e37a 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 b0ba5a1018cd..324011f40373 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);
s/=/|=/
> + I915_WRITE(ILK_DPFC_CHICKEN, val);
> }
>
> static void i915_pineview_get_mem_freq(struct drm_i915_private
> *dev_priv)
> @@ -8266,6 +8272,8 @@ static void gen8_set_l3sqc_credits(struct
> drm_i915_private *dev_priv,
>
> static void cnl_init_clock_gating(struct drm_i915_private *dev_priv)
> {
> + u32 val;
> +
> /* This is not an Wa. Enable for better image quality */
> I915_WRITE(_3D_CHICKEN3,
> _MASKED_BIT_ENABLE(_3D_CHICKEN3_AA_LINE_QUALITY_F
> IX_ENABLE));
> @@ -8283,6 +8291,12 @@ 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);
Same here.
> + I915_WRITE(ILK_DPFC_CHICKEN, val);
> }
>
> static void kbl_init_clock_gating(struct drm_i915_private *dev_priv)
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