[PATCH v3 2/2] drm/amd/display: add vendor specific reset

[Hamza Mahfooz]

We now have a means to respond to page flip timeouts. So, hook up
support by sending out a wedged event if
drm_atomic_helper_wait_for_flip_done() fails.

Signed-off-by: Hamza Mahfooz <someguy@xxxxxxxxxxxxxxxxxxx>
---
v2: send a wedged event instead of attempting a GPU reset.
v3: read return value of drm_atomic_helper_wait_for_flip_done().
---
 drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
index 7c51d8d7e73c..06d8353cb616 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -87,6 +87,7 @@
 #include <drm/drm_atomic_uapi.h>
 #include <drm/drm_atomic_helper.h>
 #include <drm/drm_blend.h>
+#include <drm/drm_drv.h>
 #include <drm/drm_fixed.h>
 #include <drm/drm_fourcc.h>
 #include <drm/drm_edid.h>
@@ -11085,8 +11086,12 @@ static void amdgpu_dm_atomic_commit_tail(struct drm_atomic_state *state)
 	/* Signal HW programming completion */
 	drm_atomic_helper_commit_hw_done(state);
 
-	if (wait_for_vblank)
-		drm_atomic_helper_wait_for_flip_done(dev, state);
+	if (wait_for_vblank) {
+		if (drm_atomic_helper_wait_for_flip_done(dev, state))
+			drm_dev_wedged_event(dev, DRM_WEDGE_RECOVERY_REBIND |
+					     DRM_WEDGE_RECOVERY_BUS_RESET,
+					     NULL);
+	}
 
 	drm_atomic_helper_cleanup_planes(dev, state);
 
-- 
2.53.0