From: Thomas Zimmermann <tzimmermann@xxxxxxx> 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@xxxxxxx> Signed-off-by: Takashi Iwai <tiwai@xxxxxxx> --- 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@xxxxxxxxxxxx> */ +#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
