The patch below does not apply to the 4.4-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to stable@vger.kernel.org.
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
From 2eb0964eec5f1d99f9eaf4963eee267acc72b615 Mon Sep 17 00:00:00 2001
From: Chris Wilson chris@chris-wilson.co.uk Date: Wed, 4 Sep 2019 11:07:07 +0100 Subject: [PATCH] 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: 8424171e135c ("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@ch... (cherry picked from commit 9d7b01e93526efe79dbf75b69cc5972b5a4f7b37) Signed-off-by: Jani Nikula jani.nikula@intel.com
diff --git a/drivers/gpu/drm/i915/gt/intel_workarounds.c b/drivers/gpu/drm/i915/gt/intel_workarounds.c index 98dfb086320f..99e8242194c0 100644 --- a/drivers/gpu/drm/i915/gt/intel_workarounds.c +++ b/drivers/gpu/drm/i915/gt/intel_workarounds.c @@ -308,11 +308,6 @@ static void gen9_ctx_workarounds_init(struct intel_engine_cs *engine, FLOW_CONTROL_ENABLE | 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 */ /* WaEnableSamplerGPGPUPreemptionSupport:skl,bxt,kbl,cfl */ WA_SET_BIT_MASKED(GEN9_HALF_SLICE_CHICKEN7,