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authorMichel Dänzer <michel.daenzer@amd.com>2015-11-05 17:25:27 +0900
committerAlex Deucher <alexander.deucher@amd.com>2015-11-16 11:05:44 -0500
commita28bbd5824d4a2af98de45b300ab8d8fb39739fc (patch)
tree39f3054ac7dbed7674037ba928a629cbd5e02ecc /drivers
parent96ea47c0ec8c012509116bee8c57414281428fc4 (diff)
drm/radeon: Always disable RADEON_GEM_GTT_UC along with RADEON_GEM_GTT_WC
Write-combining is a CPU feature. From the GPU POV, these both simply mean no GPU<->CPU cache coherency. Reviewed-by: Christian König <christian.koenig@amd.com> Signed-off-by: Michel Dänzer <michel.daenzer@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/gpu/drm/radeon/radeon_object.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/gpu/drm/radeon/radeon_object.c b/drivers/gpu/drm/radeon/radeon_object.c
index a35f5af77c6a..dda2ecfbf056 100644
--- a/drivers/gpu/drm/radeon/radeon_object.c
+++ b/drivers/gpu/drm/radeon/radeon_object.c
@@ -231,7 +231,7 @@ int radeon_bo_create(struct radeon_device *rdev,
/* XXX: Write-combined CPU mappings of GTT seem broken on 32-bit
* See https://bugs.freedesktop.org/show_bug.cgi?id=84627
*/
- bo->flags &= ~RADEON_GEM_GTT_WC;
+ bo->flags &= ~(RADEON_GEM_GTT_WC | RADEON_GEM_GTT_UC);
#elif defined(CONFIG_X86) && !defined(CONFIG_X86_PAT)
/* Don't try to enable write-combining when it can't work, or things
* may be slow
@@ -243,7 +243,7 @@ int radeon_bo_create(struct radeon_device *rdev,
DRM_INFO_ONCE("Please enable CONFIG_MTRR and CONFIG_X86_PAT for "
"better performance thanks to write-combining\n");
- bo->flags &= ~RADEON_GEM_GTT_WC;
+ bo->flags &= ~(RADEON_GEM_GTT_WC | RADEON_GEM_GTT_UC);
#endif
radeon_ttm_placement_from_domain(bo, domain);