This is a note to let you know that I've just added the patch titled
drm/fb_helper: move deferred fb checking into restore mode (v2)
to the 3.18-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
drm-fb_helper-move-deferred-fb-checking-into-restore-mode-v2.patch
and it can be found in the queue-3.18 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From e2809c7db818df6bbd0edf843e1beb2fbc9d8541 Mon Sep 17 00:00:00 2001
From: Dave Airlie <airlied@xxxxxxxxxx>
Date: Wed, 26 Nov 2014 13:15:24 +1000
Subject: drm/fb_helper: move deferred fb checking into restore mode (v2)
From: Dave Airlie <airlied@xxxxxxxxxx>
commit e2809c7db818df6bbd0edf843e1beb2fbc9d8541 upstream.
On MST systems the monitors don't appear when we set the fb up,
but plymouth opens the drm device and holds it open while they
come up, when plymouth finishes and lastclose gets called we
don't do the delayed fb probe, so the monitor never appears on the
console.
Fix this by moving the delayed checking into the mode restore.
v2: Daniel suggested that ->delayed_hotplug is set under
the mode_config mutex, so we should check it under that as
well, while we are in the area.
Reviewed-by: Daniel Vetter <daniel.vetter@xxxxxxxx>
Signed-off-by: Dave Airlie <airlied@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/drm_fb_helper.c | 13 +++++++++----
1 file changed, 9 insertions(+), 4 deletions(-)
--- a/drivers/gpu/drm/drm_fb_helper.c
+++ b/drivers/gpu/drm/drm_fb_helper.c
@@ -347,9 +347,18 @@ bool drm_fb_helper_restore_fbdev_mode_un
{
struct drm_device *dev = fb_helper->dev;
bool ret;
+ bool do_delayed = false;
+
drm_modeset_lock_all(dev);
ret = restore_fbdev_mode(fb_helper);
+
+ do_delayed = fb_helper->delayed_hotplug;
+ if (do_delayed)
+ fb_helper->delayed_hotplug = false;
drm_modeset_unlock_all(dev);
+
+ if (do_delayed)
+ drm_fb_helper_hotplug_event(fb_helper);
return ret;
}
EXPORT_SYMBOL(drm_fb_helper_restore_fbdev_mode_unlocked);
@@ -888,10 +897,6 @@ int drm_fb_helper_set_par(struct fb_info
drm_fb_helper_restore_fbdev_mode_unlocked(fb_helper);
- if (fb_helper->delayed_hotplug) {
- fb_helper->delayed_hotplug = false;
- drm_fb_helper_hotplug_event(fb_helper);
- }
return 0;
}
EXPORT_SYMBOL(drm_fb_helper_set_par);
Patches currently in stable-queue which might be from airlied@xxxxxxxxxx are
queue-3.18/drm-ttm-avoid-memory-allocation-from-shrinker-functions.patch
queue-3.18/drm-dp-retry-aux-transactions-32-times-v1.1.patch
queue-3.18/drm-fb_helper-move-deferred-fb-checking-into-restore-mode-v2.patch
queue-3.18/drm-dp-mst-remove-branches-before-dropping-the-reference.patch
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