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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> | 2016-07-15 15:51:28 +0300 |
| commit | 5b889896be07cb12f0401dc2cfdec6eb6413c774 (patch) | |
| tree | a9af9d23e9fda4c125b4bed89d5dc10acb162e75 /drivers/gpu | |
| parent | f20b1ba04e917be9cadd3171a99568a1badb8b1b (diff) | |
| download | lwn-5b889896be07cb12f0401dc2cfdec6eb6413c774.tar.gz lwn-5b889896be07cb12f0401dc2cfdec6eb6413c774.zip | |
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
(cherry picked from commit 303d4ea522e8672a1b62d968a5b6764929adc292)
Signed-off-by: Mika Kuoppala <mika.kuoppala@intel.com>
Diffstat (limited to 'drivers/gpu')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_reg.h | 1 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/intel_pm.c | 6 |
2 files changed, 5 insertions, 2 deletions
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index 87655ac6a39c..235dfac9fe93 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -6046,6 +6046,7 @@ enum skl_disp_power_wells { #define CHICKEN_PIPESL_1(pipe) _MMIO_PIPE(pipe, _CHICKEN_PIPESL_1_A, _CHICKEN_PIPESL_1_B) #define DISP_ARB_CTL _MMIO(0x45000) +#define DISP_FBC_MEMORY_WAKE (1<<31) #define DISP_TILE_SURFACE_SWIZZLING (1<<13) #define DISP_FBC_WM_DIS (1<<15) #define DISP_ARB_CTL2 _MMIO(0x45004) diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c index 5eb48ad2df85..61113a22bc89 100644 --- a/drivers/gpu/drm/i915/intel_pm.c +++ b/drivers/gpu/drm/i915/intel_pm.c @@ -70,8 +70,10 @@ 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) |