leandrof/linux
1
0
Fork 0
forked from Minki/linux
Code Issues Pull Requests Packages Projects Releases Wiki Activity

drm: Schedule the output_poll_work with 1s delay if we have delayed event

Browse Source 
Instead of scheduling the work to handle the initial delayed event, use 1s
delay.

This delay should not be needed, but Optimus/nouveau will fail in a
mysterious way if the delayed event is handled as soon as possible like it
is done in drm_helper_probe_single_connector_modes() in case the poll
was enabled before.

Reverting 339fd36238 would give back the 10 sec (!) delay to handle the
delayed event. Adding 1sec delay to the poll_work is enough to work around
the issue in Optimus setups and gives shorter response on handling the
initial delayed event.

Fixes: 339fd36238 ("drm: drm_probe_helper: Fix output_poll_work scheduling")
Cc: stable@vger.kernel.org   # v4.9
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
[danvet: Add FIXME to the comment to make it stick out more.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/20170109143158.21917-1-peter.ujfalusi@ti.com
This commit is contained in:
Peter Ujfalusi 2017-01-09 16:31:58 +02:00 committed by Daniel Vetter
parent 9afe69d5a9
commit 68f458eec7
1 changed files with 11 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
drivers/gpu/drm/drm_probe_helper.c
View File

@ -143,8 +143,18 @@ void drm_kms_helper_poll_enable_locked(struct drm_device *dev)
}
if (dev->mode_config.delayed_event) {
/*
* FIXME:
*
* Use short (1s) delay to handle the initial delayed event.
* This delay should not be needed, but Optimus/nouveau will
* fail in a mysterious way if the delayed event is handled as
* soon as possible like it is done in
* drm_helper_probe_single_connector_modes() in case the poll
* was enabled before.
*/
poll = true;
delay = 0;
delay = HZ;
}
if (poll)