[PATCH] drm/i915: enable WaDisableDopClkGating for SKL GT4

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



This WA is required when decopled frequencies for slice
and unslice are enabled. This disables DOP clock gating
for SKL GT4.

Cc: David Weinehall <david.weinehall@xxxxxxxxxxxxxxx>
Signed-off-by: Praveen Paneri <praveen.paneri@xxxxxxxxx>
---
 drivers/gpu/drm/i915/intel_pm.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 48785ef..6dee3b6 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -78,6 +78,12 @@ static void gen9_init_clock_gating(struct drm_i915_private *dev_priv)
 	/* WaFbcHighMemBwCorruptionAvoidance:skl,bxt,kbl,cfl */
 	I915_WRITE(ILK_DPFC_CHICKEN, I915_READ(ILK_DPFC_CHICKEN) |
 		   ILK_DPFC_DISABLE_DUMMY0);
+
+	if (IS_SKL_GT4(dev_priv)) {
+		/* WaDisableDopClockGating */
+		I915_WRITE(GEN7_MISCCPCTL, I915_READ(GEN7_MISCCPCTL)
+			   & ~GEN7_DOP_CLOCK_GATE_ENABLE);
+	}
 }
 
 static void bxt_init_clock_gating(struct drm_i915_private *dev_priv)
-- 
1.9.1

_______________________________________________
Intel-gfx mailing list
Intel-gfx@xxxxxxxxxxxxxxxxxxxxx
https://lists.freedesktop.org/mailman/listinfo/intel-gfx




[Index of Archives]     [Linux USB Devel]     [Linux Audio Users]     [Yosemite News]     [Linux Kernel]     [Linux SCSI]
  Powered by Linux