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drm/i915: Configure GAM_ECOCHK appropriatly for Gen7 

IVB and HSW use different encodings for the PPGTT cacheability bits in
the GAM_ECOCHK register.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Ville Syrjälä 2013-04-04 15:13:42 +03:00 committed by Daniel Vetter
parent a65c2fcd00
commit a6f429a5a2
2 changed files with 14 additions and 2 deletions
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11
drivers/gpu/drm/i915/i915_gem_gtt.c
View File

@ -117,12 +117,19 @@ static int gen6_ppgtt_enable(struct drm_device *dev)
ECOCHK_PPGTT_CACHE64B);
I915_WRITE(GFX_MODE, _MASKED_BIT_ENABLE(GFX_PPGTT_ENABLE));
} else if (INTEL_INFO(dev)->gen >= 7) {
uint32_t ecobits;
uint32_t ecochk, ecobits;
ecobits = I915_READ(GAC_ECO_BITS);
I915_WRITE(GAC_ECO_BITS, ecobits | ECOBITS_PPGTT_CACHE64B);
I915_WRITE(GAM_ECOCHK, ECOCHK_PPGTT_CACHE64B);
ecochk = I915_READ(GAM_ECOCHK);
if (IS_HASWELL(dev)) {
ecochk |= ECOCHK_PPGTT_WB_HSW;
} else {
ecochk |= ECOCHK_PPGTT_LLC_IVB;
ecochk &= ~ECOCHK_PPGTT_GFDT_IVB;
}
I915_WRITE(GAM_ECOCHK, ecochk);
/* GFX_MODE is per-ring on gen7+ */
}

5
drivers/gpu/drm/i915/i915_reg.h
View File

@ -125,6 +125,11 @@
#define HSW_ECOCHK_ARB_PRIO_SOL (1<<6)
#define ECOCHK_PPGTT_CACHE64B (0x3<<3)
#define ECOCHK_PPGTT_CACHE4B (0x0<<3)
#define ECOCHK_PPGTT_GFDT_IVB (0x1<<4)
#define ECOCHK_PPGTT_LLC_IVB (0x1<<3)
#define ECOCHK_PPGTT_UC_HSW (0x1<<3)
#define ECOCHK_PPGTT_WT_HSW (0x2<<3)
#define ECOCHK_PPGTT_WB_HSW (0x3<<3)
#define GAC_ECO_BITS 0x14090
#define ECOBITS_SNB_BIT (1<<13)