[PATCH 1/2] drm/radeon: Don't use WC for VRAM if !RADEON_GEM_GTT_WC

[Huacai Chen]

Though RADEON_GEM_GTT_WC is initially used for GTT, but this flag is
bound to drm_arch_can_wc_memory(), and if arch doesn't support WC, then
VRAM should not use WC.

Signed-off-by: Huacai Chen <chenhc at lemote.com>
---
 drivers/gpu/drm/radeon/radeon_object.c | 14 ++++++++++----
 1 file changed, 10 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/radeon/radeon_object.c b/drivers/gpu/drm/radeon/radeon_object.c
index f3dee01..07b82d9 100644
--- a/drivers/gpu/drm/radeon/radeon_object.c
+++ b/drivers/gpu/drm/radeon/radeon_object.c
@@ -117,10 +117,16 @@ void radeon_ttm_placement_from_domain(struct radeon_bo *rbo, u32 domain)
 						     TTM_PL_FLAG_VRAM;
 		}
 
-		rbo->placements[c].fpfn = 0;
-		rbo->placements[c++].flags = TTM_PL_FLAG_WC |
-					     TTM_PL_FLAG_UNCACHED |
-					     TTM_PL_FLAG_VRAM;
+		if (rbo->flags & RADEON_GEM_GTT_WC) {
+			rbo->placements[c].fpfn = 0;
+			rbo->placements[c++].flags = TTM_PL_FLAG_WC |
+						     TTM_PL_FLAG_UNCACHED |
+						     TTM_PL_FLAG_VRAM;
+		} else {
+			rbo->placements[c].fpfn = 0;
+			rbo->placements[c++].flags = TTM_PL_FLAG_UNCACHED |
+						     TTM_PL_FLAG_VRAM;
+		}
 	}
 
 	if (domain & RADEON_GEM_DOMAIN_GTT) {
-- 
2.7.0