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| author | Mika Kuoppala <mika.kuoppala@linux.intel.com> | 2016-06-07 17:19:17 +0300 |
|---|---|---|
| committer | Mika Kuoppala <mika.kuoppala@intel.com> | 2016-06-08 16:26:57 +0300 |
| commit | 303d4ea522e8672a1b62d968a5b6764929adc292 (patch) | |
| tree | da02aec723df14f5e07f6dbb2445f24de47871d1 /drivers/gpu/drm/i915/intel_pm.c | |
| parent | 0f78dee6f06a9399d4bdf79575094cc761b872ac (diff) | |
| download | linux-303d4ea522e8672a1b62d968a5b6764929adc292.tar.xz | |
drm/i915/gen9: Add WaFbcWakeMemOn
Set bit 8 in 0x43224 to prevent screen corruption and system
hangs on high memory bandwidth conditions. The same wa also suggest
setting bit 31 on ARB_CTL. According to another workaround we gain
better idle power savings when FBC is enabled.
v2: use correct workaround name
v3: split out overlapping wa for corruption avoidance (Ville)
References: HSD#2137218, HSD#2227171, HSD#2136579, BSID#883
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/1465309159-30531-26-git-send-email-mika.kuoppala@intel.com
Diffstat (limited to 'drivers/gpu/drm/i915/intel_pm.c')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_pm.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c index de3dd241e151..8df9b5288679 100644 --- a/drivers/gpu/drm/i915/intel_pm.c +++ b/drivers/gpu/drm/i915/intel_pm.c @@ -71,8 +71,10 @@ static void gen9_init_clock_gating(struct drm_device *dev) 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); + /* WaFbcWakeMemOn:skl,bxt,kbl */ + I915_WRITE(DISP_ARB_CTL, I915_READ(DISP_ARB_CTL) | + DISP_FBC_WM_DIS | + DISP_FBC_MEMORY_WAKE); } static void bxt_init_clock_gating(struct drm_device *dev) |