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

[Michel Dänzer]

From: Michel D?nzer <michel.daen...@amd.com>

The HDP cache only applies to CPU access to VRAM.

Signed-off-by: Michel D?nzer <michel.daenzer at amd.com>
---
 drivers/gpu/drm/radeon/radeon_gem.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/radeon/radeon_gem.c 
b/drivers/gpu/drm/radeon/radeon_gem.c
index a350cf9..8f2cb58 100644
--- a/drivers/gpu/drm/radeon/radeon_gem.c
+++ b/drivers/gpu/drm/radeon/radeon_gem.c
@@ -359,15 +359,17 @@ 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);
-- 
2.0.1