Subject: FAILED: patch "[PATCH] drm/i915: Restore relaxed padding (OCL_OOB_SUPPRES_ENABLE)" failed to apply to 4.9-stable tree
To:     chris@chris-wilson.co.uk, jani.nikula@intel.com,
        jason@jlekstrand.net, mika.kuoppala@linux.intel.com,
        stable@vger.kernel.org
Cc:     <stable@vger.kernel.org>
From:   <gregkh@linuxfoundation.org>
Date:   Mon, 16 Sep 2019 17:18:27 +0200
Message-ID: <1568647107167228@kroah.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=ANSI_X3.4-1968
Content-Transfer-Encoding: 8bit
Sender: stable-owner@vger.kernel.org
Precedence: bulk


The patch below does not apply to the 4.9-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@chris-wilson.co.uk
(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,