drm/i915: Change VLV WIZ hashing mode to 16x4 (da2518f9) · Commits · 戴 / test

We set the WIZ hashing mode to 16x4 for all the other gen6+ platfotrms, so let's follow suit on VLV. My VLV is AWOL currently so I didn't test this, but since the results for all the other platforms agree that 16x4 is the fastest we might assume the same holds for VLV. Signed-off-by:

Ville Syrjälä <ville.syrjala@linux.intel.com> Reviewed-by:

Arun Siluvery <arun.siluvery@linux.intel.com> Signed-off-by:

Daniel Vetter <daniel.vetter@ffwll.ch>

drivers/gpu/drm/i915/intel_pm.c

+11 −0

Original line number	Diff line number	Diff line
		@@ -6229,6 +6229,17 @@ static void valleyview_init_clock_gating(struct drm_device *dev)
		I915_WRITE(CACHE_MODE_1,
		_MASKED_BIT_ENABLE(PIXEL_SUBSPAN_COLLECT_OPT_DISABLE));

		/*
		* BSpec recommends 8x4 when MSAA is used,
		* however in practice 16x4 seems fastest.
		*
		* Note that PS/WM thread counts depend on the WIZ hashing
		* disable bit, which we don't touch here, but it's good
		* to keep in mind (see 3DSTATE_PS and 3DSTATE_WM).
		*/
		I915_WRITE(GEN7_GT_MODE,
		_MASKED_FIELD(GEN6_WIZ_HASHING_MASK, GEN6_WIZ_HASHING_16x4));

		/*
		* WaIncreaseL3CreditsForVLVB0:vlv
		* This is the hardware default actually.

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