Commit 9d7b01e9 authored Sep 04, 2019 by Chris Wilson

drm/i915: Restore relaxed padding (OCL_OOB_SUPPRES_ENABLE) for skl+



This bit was fliped on for "syncing dependencies between camera and
graphics". BSpec has no recollection why, and it is causing
unrecoverable GPU hangs with Vulkan compute workloads.

From BSpec, setting bit5 to 0 enables relaxed padding requirements for
buffers, 1D and 2D non-array, non-MSAA, non-mip-mapped linear surfaces;
and *must* be set to 0h on skl+ to ensure "Out of Bounds" case is
suppressed.

Reported-by: Jason Ekstrand <jason@jlekstrand.net>
Suggested-by: Jason Ekstrand <jason@jlekstrand.net>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=110998


Fixes: 8424171e ("drm/i915/gen9: h/w w/a: syncing dependencies between camera and graphics")
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Tested-by:  <denys.kostin@globallogic.com>
Cc: Jason Ekstrand <jason@jlekstrand.net>
Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Cc: <stable@vger.kernel.org> # v4.1+
Reviewed-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190904100707.7377-1-chris@chris-wilson.co.uk

parent 4bb6a9d5

drivers/gpu/drm/i915/gt/intel_workarounds.c

+0 −5

Original line number	Original line	Diff line number	Diff line
	@@ -297,11 +297,6 @@ static void gen9_ctx_workarounds_init(struct intel_engine_cs *engine,
	FLOW_CONTROL_ENABLE \|		FLOW_CONTROL_ENABLE \|
	PARTIAL_INSTRUCTION_SHOOTDOWN_DISABLE);		PARTIAL_INSTRUCTION_SHOOTDOWN_DISABLE);

	/* Syncing dependencies between camera and graphics:skl,bxt,kbl */
	if (!IS_COFFEELAKE(i915))
	WA_SET_BIT_MASKED(HALF_SLICE_CHICKEN3,
	GEN9_DISABLE_OCL_OOB_SUPPRESS_LOGIC);

	/* WaEnableYV12BugFixInHalfSliceChicken7:skl,bxt,kbl,glk,cfl */		/* WaEnableYV12BugFixInHalfSliceChicken7:skl,bxt,kbl,glk,cfl */
	/* WaEnableSamplerGPGPUPreemptionSupport:skl,bxt,kbl,cfl */		/* WaEnableSamplerGPGPUPreemptionSupport:skl,bxt,kbl,cfl */
	WA_SET_BIT_MASKED(GEN9_HALF_SLICE_CHICKEN7,		WA_SET_BIT_MASKED(GEN9_HALF_SLICE_CHICKEN7,

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