Attachment 28393 Details for Bug 23082 – (kernel patch 2) fix batch buffer end address

[patch] (kernel patch 2) fix batch buffer end address

0002-drm-i915-fix-batch-buffer-end-address-on-845G-and-83.patch (text/plain), 1.54 KB, created by Wang Zhenyu on 2009-08-06 00:39:12 UTC

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Creator: Wang Zhenyu

Created: 2009-08-06 00:39:12 UTC

Size: 1.54 KB

patch

obsolete

>From aa71b76752ebf79cab7ce726da8d568ed93ba3be Mon Sep 17 00:00:00 2001
>From: Zhenyu Wang <zhenyuw@linux.intel.com>
>Date: Thu, 6 Aug 2009 22:11:54 +0800
>Subject: [PATCH 2/2] drm/i915: fix batch buffer end address on 845G and 830M
>
>The batch buffer end address should be set to the last valid
>qword, e.g 1 qword size batch should have identical start and
>end address.
>
>Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
>---
> drivers/gpu/drm/i915/i915_dma.c |    2 +-
> drivers/gpu/drm/i915/i915_gem.c |    2 +-
> 2 files changed, 2 insertions(+), 2 deletions(-)
>
>diff --git a/drivers/gpu/drm/i915/i915_dma.c b/drivers/gpu/drm/i915/i915_dma.c
>index 867943a..bd607ec 100644
>--- a/drivers/gpu/drm/i915/i915_dma.c
>+++ b/drivers/gpu/drm/i915/i915_dma.c
>@@ -531,7 +531,7 @@ static int i915_dispatch_batchbuffer(struct drm_device * dev,
> 			BEGIN_LP_RING(4);
> 			OUT_RING(MI_BATCH_BUFFER);
> 			OUT_RING(batch->start | MI_BATCH_NON_SECURE);
>-			OUT_RING(batch->start + batch->used - 4);
>+			OUT_RING(batch->start + batch->used - 8);
> 			OUT_RING(0);
> 			ADVANCE_LP_RING();
> 		}
>diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
>index 5bf4203..a6fa21f 100644
>--- a/drivers/gpu/drm/i915/i915_gem.c
>+++ b/drivers/gpu/drm/i915/i915_gem.c
>@@ -3118,7 +3118,7 @@ i915_dispatch_gem_execbuffer(struct drm_device *dev,
> 			BEGIN_LP_RING(4);
> 			OUT_RING(MI_BATCH_BUFFER);
> 			OUT_RING(exec_start | MI_BATCH_NON_SECURE);
>-			OUT_RING(exec_start + exec_len - 4);
>+			OUT_RING(exec_start + exec_len - 8);
> 			OUT_RING(0);
> 			ADVANCE_LP_RING();
> 		} else {
>-- 
>1.6.3.3
>

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