drm/i915/bdw: Disable idle DOP clock gating
It seems we need this at least for the current platforms we have, but
probably not later. In any event, it should cause too much harm as we do
the same thing on several other platforms.
Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@gmail.com>
Reviewed-by: Brad Volkin <bradley.d.volkin@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 19020e5..0c33953 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -4988,6 +4988,10 @@
I915_WRITE(GEN7_HALF_SLICE_CHICKEN1,
_MASKED_BIT_ENABLE(GEN7_SINGLE_SUBSCAN_DISPATCH_ENABLE));
+ /* WaDisableDopClockGating:bdw May not be needed for production */
+ I915_WRITE(GEN7_ROW_CHICKEN2,
+ _MASKED_BIT_ENABLE(DOP_CLOCK_GATING_DISABLE));
+
/* WaSwitchSolVfFArbitrationPriority:bdw */
I915_WRITE(GAM_ECOCHK, I915_READ(GAM_ECOCHK) | HSW_ECOCHK_ARB_PRIO_SOL);