[PATCH 01/12] drm/udl: Restore display mode on resume

[Takashi Iwai]

From: Thomas Zimmermann <tzimmermann at suse.de>

Restore the display mode whne resuming from suspend. Currently, the
display remains dark.

On resume, the CRTC's mode does not change, but the 'active' flag
changes to 'true'. Taking this into account when considering a mode
switch restores the display mode.

The bug is reproducable by using Gnome with udl and observing the
adapter's suspend/resume behavior.

Signed-off-by: Thomas Zimmermann <tzimmermann at suse.de>
Signed-off-by: Takashi Iwai <tiwai at suse.de>
---
 drivers/gpu/drm/udl/udl_modeset.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/udl/udl_modeset.c b/drivers/gpu/drm/udl/udl_modeset.c
index 169110d8fc2e..df987644fb5d 100644
--- a/drivers/gpu/drm/udl/udl_modeset.c
+++ b/drivers/gpu/drm/udl/udl_modeset.c
@@ -8,6 +8,7 @@
  * Copyright (C) 2009 Bernie Thompson <bernie at plugable.com>
  */
 
+#include <drm/drm_atomic.h>
 #include <drm/drm_atomic_helper.h>
 #include <drm/drm_crtc_helper.h>
 #include <drm/drm_damage_helper.h>
@@ -382,7 +383,7 @@ udl_simple_display_pipe_enable(struct drm_simple_display_pipe *pipe,
 
 	udl_handle_damage(fb, &shadow_plane_state->data[0], 0, 0, fb->width, fb->height);
 
-	if (!crtc_state->mode_changed)
+	if (!drm_atomic_crtc_needs_modeset(crtc_state))
 		return;
 
 	/* enable display */
-- 
2.35.3