提交 96ea47c0 编写于 作者: M Michel Dänzer 提交者: Alex Deucher

drm/radeon: Disable uncacheable CPU mappings of GTT with RV6xx

They reportedly cause random GPU hangs.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=91268Reviewed-by: NChristian König <christian.koenig@amd.com>
Cc: stable@vger.kernel.org
Signed-off-by: NMichel Dänzer <michel.daenzer@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>
上级 5bad7d29
......@@ -221,6 +221,12 @@ int radeon_bo_create(struct radeon_device *rdev,
if (!(rdev->flags & RADEON_IS_PCIE))
bo->flags &= ~(RADEON_GEM_GTT_WC | RADEON_GEM_GTT_UC);
/* Write-combined CPU mappings of GTT cause GPU hangs with RV6xx
* See https://bugs.freedesktop.org/show_bug.cgi?id=91268
*/
if (rdev->family >= CHIP_RV610 && rdev->family <= CHIP_RV635)
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
......
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