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

[Kamble, Sagar A]

Ignore the comment. I thought about CPG.
Sorry.

-----Original Message-----
From: Kamble, Sagar A 
Sent: Tuesday, September 8, 2015 3:44 PM
To: 'Arun Siluvery' <arun.siluvery at linux.intel.com>; intel-gfx at lists.freedesktop.org
Cc: Kuoppala, Mika <mika.kuoppala at intel.com>
Subject: RE: [Intel-gfx] [PATCH 6/6] drm/i915/gen9: Add WaDisableMinuteIaClockGating

This is applicable to SKL GT3 and GT4.
Can you add that check as well?

-----Original Message-----
From: Intel-gfx [mailto:intel-gfx-bounces at lists.freedesktop.org] On Behalf Of Arun Siluvery
Sent: Tuesday, September 8, 2015 3:02 PM
To: intel-gfx at lists.freedesktop.org
Cc: Kuoppala, Mika <mika.kuoppala at intel.com>
Subject: [Intel-gfx] [PATCH 6/6] drm/i915/gen9: Add WaDisableMinuteIaClockGating

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

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