[Intel-gfx] [PATCH 6/6] drm/i915/gen9: Add WaDisableMinuteIaClockGating

[Arun Siluvery]

From: Nick Hoath <nicholas.hoath at intel.com>

Signed-off-by: Nick Hoath <nicholas.hoath at intel.com>
Signed-off-by: Arun Siluvery <arun.siluvery at linux.intel.com>
---
 drivers/gpu/drm/i915/intel_guc_loader.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/gpu/drm/i915/intel_guc_loader.c b/drivers/gpu/drm/i915/intel_guc_loader.c
index 5eafd31..e0601cc 100644
--- a/drivers/gpu/drm/i915/intel_guc_loader.c
+++ b/drivers/gpu/drm/i915/intel_guc_loader.c
@@ -330,6 +330,13 @@ static int guc_ucode_xfer(struct drm_i915_private *dev_priv)
 	/* Enable MIA caching. GuC clock gating is disabled. */
 	I915_WRITE(GUC_SHIM_CONTROL, GUC_SHIM_CONTROL_VALUE);
 
+	/* WaDisableMinuteIaClockGating:skl,bxt */
+	if ((IS_SKYLAKE(dev) && INTEL_REVID(dev) <= SKL_REVID_B0) ||
+	    (IS_BROXTON(dev) && INTEL_REVID(dev) == BXT_REVID_A0)) {
+		I915_WRITE(GUC_SHIM_CONTROL, (I915_READ(GUC_SHIM_CONTROL) &
+					      ~GUC_ENABLE_MIA_CLOCK_GATING));
+	}
+
 	/* WaC6DisallowByGfxPause*/
 	I915_WRITE(GEN6_GFXPAUSE, 0x30FFF);
 
-- 
1.9.1