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drm/i915:gen9: restrict WaC6DisallowByGfxPause

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WaC6DisallowByGfxPause is currently applied unconditionally
but is not required in all revisions.

v2: extend application of workaround to agree with w/a
database, which differs from the HSD.

References: HSD#2133391
Signed-off-by: Tim Gore <tim.gore@intel.com>
Reviewed-by: Sagar Arun Kamble <sagar.a.kamble@intel.com>
Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1469008825-19442-1-git-send-email-tim.gore@intel.com
This commit is contained in:
Tim Gore 2016-07-20 11:00:25 +01:00 committed by Tvrtko Ursulin
parent f8ca0c07f6
commit 65fe29eeec
1 changed files with 3 additions and 1 deletions
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4
drivers/gpu/drm/i915/intel_guc_loader.c
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@ -349,7 +349,9 @@ static int guc_ucode_xfer(struct drm_i915_private *dev_priv)
}
/* WaC6DisallowByGfxPause*/
I915_WRITE(GEN6_GFXPAUSE, 0x30FFF);
if (IS_SKL_REVID(dev, 0, SKL_REVID_C0) ||
IS_BXT_REVID(dev, 0, BXT_REVID_B0))
I915_WRITE(GEN6_GFXPAUSE, 0x30FFF);
if (IS_BROXTON(dev))
I915_WRITE(GEN9LP_GT_PM_CONFIG, GT_DOORBELL_ENABLE);