From: Chris Wilson Date: Fri, 14 Feb 2014 22:34:43 +0000 (+0000) Subject: drm/i915: Revert workaround for disabling L3 cache aging on IVB X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=1af8452f1644acdef85a587c5e8264807f9b83a8;p=linux-beck.git drm/i915: Revert workaround for disabling L3 cache aging on IVB In commit e4e0c058a19c41150d12ad2d3023b3cf09c5de67 Author: Eugeni Dodonov Date: Wed Feb 8 12:53:50 2012 -0800 drm/i915: gen7: Implement an L3 caching workaround. the L3 cache aging was disabled. This was part of a shotgun response to a number of GPU hang bugs, but there appears to be no documentation to suggest that disabling the L3 cache age was ever required (to prevent the GPU hangs). Restoring the L3 cache age is a minor performance win of around 2% on IVB:GT2. (Note that this value seems to be consistent across a number of tests and so appears to be above the usual noise.) Signed-off-by: Chris Wilson Cc: Kenneth Graunke Reviewed-by: Ville Syrjälä Signed-off-by: Daniel Vetter --- diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index 5e832b1fd9d6..e3130352dfaa 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -4169,7 +4169,7 @@ #define VLV_B0_WA_L3SQCREG1_VALUE 0x00D30000 #define GEN7_L3CNTLREG1 0xB01C -#define GEN7_WA_FOR_GEN7_L3_CONTROL 0x3C4FFF8C +#define GEN7_WA_FOR_GEN7_L3_CONTROL 0x3C47FF8C #define GEN7_L3AGDIS (1<<19) #define GEN7_L3_CHICKEN_MODE_REGISTER 0xB030