drm/atomic-helper: Do not call ->mode_fixup for CRTC which will be di…

…sabled When a CRTC is going to be disabled, it's state may contain a display mode with zeroed content. This could be reproduced by HDMI cable hotplug out operation with legacy fbdev support in dual display cases. It would confuse driver's CRTC callback ->mode_fixup and make the total state be rejected. So, let's don't call the callback for the CRTC. Signed-off-by: Liu Ying <[email protected]> Signed-off-by: Daniel Vetter <[email protected]> Link: http://patchwork.freedesktop.org/patch/msgid/[email protected]
raspberrypi · May 30, 2016 · f55f170 · f55f170
1 parent c67f695
commit f55f170
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atomic_helper.c
@@ -414,6 +414,9 @@ mode_fixup(struct drm_atomic_state *state)
 	for_each_crtc_in_state(state, crtc, crtc_state, i) {
 		const struct drm_crtc_helper_funcs *funcs;
 
+		if (!crtc_state->enable)
+			continue;
+
 		if (!crtc_state->mode_changed &&
 		    !crtc_state->connectors_changed)
 			continue;