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Message-Id: <1453672883-2708-96-git-send-email-luis.henriques@canonical.com>
Date:	Sun, 24 Jan 2016 22:00:50 +0000
From:	Luis Henriques <luis.henriques@...onical.com>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	kernel-team@...ts.ubuntu.com
Cc:	Chris Wilson <chris@...is-wilson.co.uk>,
	Thomas Richter <thor@...h.tu-berlin.de>,
	Jani Nikula <jani.nikula@...el.com>,
	Luis Henriques <luis.henriques@...onical.com>
Subject: [PATCH 3.16.y-ckt 095/128] drm/i915: Fix SRC_COPY width on 830/845g

3.16.7-ckt23 -stable review patch.  If anyone has any objections, please let me know.

---8<------------------------------------------------------------

From: Chris Wilson <chris@...is-wilson.co.uk>

commit 611a7a4fd8b5fb6b25ab1f8bdcde61800a7feacf upstream.

One small change I forgot to make in

commit c4d69da167fa967749aeb70bc0e94a457e5d00c1
Author: Chris Wilson <chris@...is-wilson.co.uk>
Date:   Mon Sep 8 14:25:41 2014 +0100

    drm/i915: Evict CS TLBs between batches

was to update the copy width for the compact BLT copy instruction.

Reported-by: Thomas Richter <thor@...h.tu-berlin.de>
Signed-off-by: Chris Wilson <chris@...is-wilson.co.uk>
Cc: Thomas Richter <thor@...h.tu-berlin.de>
Cc: Jani Nikula <jani.nikula@...el.com>
Tested-by: Thomas Richter <thor@...h.tu-berlin.de>
Acked-by: Daniel Vetter <daniel@...ll.ch>
Signed-off-by: Jani Nikula <jani.nikula@...el.com>
Signed-off-by: Luis Henriques <luis.henriques@...onical.com>
---
 drivers/gpu/drm/i915/intel_ringbuffer.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c
index 6a7a35acdfa7..b849fde1ea74 100644
--- a/drivers/gpu/drm/i915/intel_ringbuffer.c
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.c
@@ -1284,7 +1284,7 @@ i830_dispatch_execbuffer(struct intel_engine_cs *ring,
 		 */
 		intel_ring_emit(ring, SRC_COPY_BLT_CMD | BLT_WRITE_RGBA);
 		intel_ring_emit(ring, BLT_DEPTH_32 | BLT_ROP_SRC_COPY | 4096);
-		intel_ring_emit(ring, DIV_ROUND_UP(len, 4096) << 16 | 1024);
+		intel_ring_emit(ring, DIV_ROUND_UP(len, 4096) << 16 | 4096);
 		intel_ring_emit(ring, cs_offset);
 		intel_ring_emit(ring, 4096);
 		intel_ring_emit(ring, offset);

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