drm/radeon: Only flush HDP cache from idle ioctl if BO is in VRAM

The HDP cache only applies to CPU access to VRAM.

Signed-off-by: Michel Dänzer <michel.daenzer@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/radeon/radeon_gem.c b/drivers/gpu/drm/radeon/radeon_gem.c
index ab9abfa..99e4e0c 100644 (file)
--- a/drivers/gpu/drm/radeon/radeon_gem.c
+++ b/drivers/gpu/drm/radeon/radeon_gem.c
@@ -358,15 +358,17 @@ int radeon_gem_wait_idle_ioctl(struct drm_device *dev, void *data,
        struct drm_gem_object *gobj;
        struct radeon_bo *robj;
        int r;
+       uint32_t cur_placement = 0;
 
        gobj = drm_gem_object_lookup(dev, filp, args->handle);
        if (gobj == NULL) {
                return -ENOENT;
        }
        robj = gem_to_radeon_bo(gobj);
-       r = radeon_bo_wait(robj, NULL, false);
+       r = radeon_bo_wait(robj, &cur_placement, false);
        /* Flush HDP cache via MMIO if necessary */
-       if (rdev->asic->mmio_hdp_flush)
+       if (rdev->asic->mmio_hdp_flush &&
+           radeon_mem_type_to_domain(cur_placement) == RADEON_GEM_DOMAIN_VRAM)
                robj->rdev->asic->mmio_hdp_flush(rdev);
        drm_gem_object_unreference_unlocked(gobj);
        r = radeon_gem_handle_lockup(rdev, r);