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| author | Mika Kuoppala <mika.kuoppala@linux.intel.com> | 2016-06-07 17:19:16 +0300 |
|---|---|---|
| committer | Mika Kuoppala <mika.kuoppala@intel.com> | 2016-07-15 15:51:28 +0300 |
| commit | f20b1ba04e917be9cadd3171a99568a1badb8b1b (patch) | |
| tree | a8631e3536d00d7626fcbc5a18f842595061b0a5 /drivers/gpu/drm/i915 | |
| parent | 703d1282d513617d9561760309e9acd902c723a7 (diff) | |
| download | linux-f20b1ba04e917be9cadd3171a99568a1badb8b1b.tar.bz2 | |
drm/i915/gen9: Add WaFbcTurnOffFbcWatermark
According to bspec this prevents screen corruption when fbc is
used.
v2: This workaround has a name, use it (Ville)
v3: remove bogus gen check on ilk/vlv wm path (Ville)
References: HSD#2135555, HSD#2137270, BSID#562
Cc: Paulo Zanoni <paulo.r.zanoni@intel.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Mika Kuoppala <mika.kuoppala@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1465309159-30531-25-git-send-email-mika.kuoppala@intel.com
(cherry picked from commit 0f78dee6f06a9399d4bdf79575094cc761b872ac)
Signed-off-by: Mika Kuoppala <mika.kuoppala@intel.com>
Diffstat (limited to 'drivers/gpu/drm/i915')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_pm.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c index 362800ba63a8..5eb48ad2df85 100644 --- a/drivers/gpu/drm/i915/intel_pm.c +++ b/drivers/gpu/drm/i915/intel_pm.c @@ -68,6 +68,10 @@ static void gen9_init_clock_gating(struct drm_device *dev) /* WaEnableChickenDCPR:skl,bxt,kbl */ I915_WRITE(GEN8_CHICKEN_DCPR_1, I915_READ(GEN8_CHICKEN_DCPR_1) | MASK_WAKEMEM); + + /* WaFbcTurnOffFbcWatermark:skl,bxt,kbl */ + I915_WRITE(DISP_ARB_CTL, + I915_READ(DISP_ARB_CTL) | DISP_FBC_WM_DIS); } static void bxt_init_clock_gating(struct drm_device *dev) |