From: Thomas Zimmermann <tzimmermann@suse.de>
To: airlied@redhat.com, sean@poorly.run, airlied@linux.ie, daniel@ffwll.ch
Cc: Thomas Zimmermann <tzimmermann@suse.de>, dri-devel@lists.freedesktop.org
Subject: [PATCH] drm/udl: Restore display mode on resume
Date: Thu, 28 Jul 2022 09:31:09 +0200 [thread overview]
Message-ID: <20220728073109.5640-1-tzimmermann@suse.de> (raw)
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@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 e67c40a48fb4..bf17f38fdb54 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@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 */
--
2.37.1
next reply other threads:[~2022-07-28 7:31 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-07-28 7:31 Thomas Zimmermann [this message]
2022-09-06 19:33 ` [PATCH] drm/udl: Restore display mode on resume Daniel Vetter
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