Attachment 117172 Details for Bug 91268 – Disable uc/wc on anything older than R7xx

[patch] Disable uc/wc on anything older than R7xx

0001-drm-radeon-disable-USWC-GTT-on-anything-older-than-R.patch (text/plain), 1.25 KB, created by Christian König on 2015-07-16 13:56:42 UTC

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Creator: Christian König

Created: 2015-07-16 13:56:42 UTC

Size: 1.25 KB

patch

obsolete

>From 96fda5d6709e1e2665d1dbd5ca2f1ac415a81e8f Mon Sep 17 00:00:00 2001
>From: =?UTF-8?q?Christian=20K=C3=B6nig?= <christian.koenig@amd.com>
>Date: Thu, 16 Jul 2015 15:53:42 +0200
>Subject: [PATCH] drm/radeon: disable USWC GTT on anything older than R7xx
>MIME-Version: 1.0
>Content-Type: text/plain; charset=UTF-8
>Content-Transfer-Encoding: 8bit
>
>There seems to be some problems on older cards.
>
>Bugs: https://bugs.freedesktop.org/show_bug.cgi?id=91268
>
>Signed-off-by: Christian KÃ¶nig <christian.koenig@amd.com>
>---
> drivers/gpu/drm/radeon/radeon_object.c | 4 ++++
> 1 file changed, 4 insertions(+)
>
>diff --git a/drivers/gpu/drm/radeon/radeon_object.c b/drivers/gpu/drm/radeon/radeon_object.c
>index 6763627..ab9f2ee 100644
>--- a/drivers/gpu/drm/radeon/radeon_object.c
>+++ b/drivers/gpu/drm/radeon/radeon_object.c
>@@ -221,6 +221,10 @@ int radeon_bo_create(struct radeon_device *rdev,
> 	if (!(rdev->flags & RADEON_IS_PCIE))
> 		bo->flags &= ~(RADEON_GEM_GTT_WC | RADEON_GEM_GTT_UC);
> 
>+	/* There seems to be some issues with older chips */
>+	if (rdev->family < CHIP_RV770)
>+		bo->flags &= ~(RADEON_GEM_GTT_WC | RADEON_GEM_GTT_UC);
>+
> #ifdef CONFIG_X86_32
> 	/* XXX: Write-combined CPU mappings of GTT seem broken on 32-bit
> 	 * See https://bugs.freedesktop.org/show_bug.cgi?id=84627
>-- 
>1.9.1
>

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Attachments on bug 91268: 117089 | 117136 | 117172

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