diff options
| author | Arun Siluvery <arun.siluvery@linux.intel.com> | 2015-07-14 15:01:29 +0100 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2015-07-15 14:30:12 +0200 |
| commit | a4106a782d11d44f6740ec8868ad1863546f832a (patch) | |
| tree | ebed54bc8e291163083f18fce640edf69099f916 /drivers/gpu/drm/i915/intel_pm.c | |
| parent | 0907c8f7e0047956dabdd70368a710dc048793eb (diff) | |
drm/i915/gen9: Add WaFlushCoherentL3CacheLinesAtContextSwitch workaround
In Indirect context w/a batch buffer,
+WaFlushCoherentL3CacheLinesAtContextSwitch:skl,bxt
v2: address static checker warning where unsigned value was checked for
less than zero which is never true (Dan Carpenter).
v3: The WA uses default value of GEN8_L3SQCREG4 during flush but that disables
some other WA; update default value to retain it and document dependency (Mika).
Cc: Mika Kuoppala <mika.kuoppala@intel.com>
Cc: Imre Deak <imre.deak@intel.com>
Signed-off-by: Arun Siluvery <arun.siluvery@linux.intel.com>
Reviewed-by: Mika Kuoppala <mika.kuoppala@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Diffstat (limited to 'drivers/gpu/drm/i915/intel_pm.c')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_pm.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c index 3a48c4f21f11..5eeddc97ca2a 100644 --- a/drivers/gpu/drm/i915/intel_pm.c +++ b/drivers/gpu/drm/i915/intel_pm.c @@ -95,6 +95,9 @@ static void skl_init_clock_gating(struct drm_device *dev) _MASKED_BIT_ENABLE(GEN9_TSG_BARRIER_ACK_DISABLE)); } + /* GEN8_L3SQCREG4 has a dependency with WA batch so any new changes + * involving this register should also be added to WA batch as required. + */ if (INTEL_REVID(dev) <= SKL_REVID_E0) /* WaDisableLSQCROPERFforOCL:skl */ I915_WRITE(GEN8_L3SQCREG4, I915_READ(GEN8_L3SQCREG4) | |