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@xxxxxxxxxx> --- 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