From: Mika Kuoppala Date: Tue, 7 Jun 2016 14:19:18 +0000 (+0300) Subject: drm/i195/fbc: Add WaFbcNukeOnHostModify X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=031cd8c85aefad31e7af91eba7bc4735a6dfcc79;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git drm/i195/fbc: Add WaFbcNukeOnHostModify Bspec states that we need to set nuke on modify all to prevent screen corruption with fbc on skl and kbl. v2: proper workaround name References: HSD#2227109, HSDES#1404569388 Cc: Ville Syrjälä Signed-off-by: Mika Kuoppala Reviewed-by: Ville Syrjälä Link: http://patchwork.freedesktop.org/patch/msgid/1465309159-30531-27-git-send-email-mika.kuoppala@intel.com --- diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index da88444cecc5..312f254f62ae 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -2209,6 +2209,7 @@ enum skl_disp_power_wells { #define ILK_DPFC_STATUS _MMIO(0x43210) #define ILK_DPFC_FENCE_YOFF _MMIO(0x43218) #define ILK_DPFC_CHICKEN _MMIO(0x43224) +#define ILK_DPFC_NUKE_ON_ANY_MODIFICATION (1<<23) #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 8df9b5288679..1464d7ba69d4 100644 --- a/drivers/gpu/drm/i915/intel_pm.c +++ b/drivers/gpu/drm/i915/intel_pm.c @@ -6998,6 +6998,10 @@ static void kabylake_init_clock_gating(struct drm_device *dev) if (IS_KBL_REVID(dev_priv, 0, KBL_REVID_B0)) I915_WRITE(GEN6_UCGCTL1, I915_READ(GEN6_UCGCTL1) | GEN6_GAMUNIT_CLOCK_GATE_DISABLE); + + /* WaFbcNukeOnHostModify:kbl */ + I915_WRITE(ILK_DPFC_CHICKEN, I915_READ(ILK_DPFC_CHICKEN) | + ILK_DPFC_NUKE_ON_ANY_MODIFICATION); } static void skylake_init_clock_gating(struct drm_device *dev) @@ -7009,6 +7013,10 @@ static void skylake_init_clock_gating(struct drm_device *dev) /* WAC6entrylatency:skl */ I915_WRITE(FBC_LLC_READ_CTRL, I915_READ(FBC_LLC_READ_CTRL) | FBC_LLC_FULLY_OPEN); + + /* WaFbcNukeOnHostModify:skl */ + I915_WRITE(ILK_DPFC_CHICKEN, I915_READ(ILK_DPFC_CHICKEN) | + ILK_DPFC_NUKE_ON_ANY_MODIFICATION); } static void broadwell_init_clock_gating(struct drm_device *dev)