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| author |   Brian Masney <masneyb@onstation.org> | 2019-05-31 05:46:15 -0400 |
|---|---|---|
| committer |   Sean Paul <seanpaul@chromium.org> | 2019-08-01 10:21:23 -0400 |
| commit | 2bab52af6fe68c43b327a57e5ce5fc10eefdfadf (patch) | |
| tree | b2b050dc192c480ee4c0a749dfe48cfa26cc8e11 /arch | |
| parent | drm/msm: Use the correct dma_sync calls in msm_gem (diff) | |
| download | linux-dev-2bab52af6fe68c43b327a57e5ce5fc10eefdfadf.tar.xz linux-dev-2bab52af6fe68c43b327a57e5ce5fc10eefdfadf.zip | |
drm/msm: add support for per-CRTC max_vblank_count on mdp5
The mdp5 drm/kms driver currently does not work on command-mode DSI
panels due to 'vblank wait timed out' errors. This causes a latency
of seconds, or tens of seconds in some cases, before content is shown
on the panel. This hardware does not have the something that we can use
as a frame counter available when running in command mode, so we need to
fall back to using timestamps by setting the max_vblank_count to zero.
This can be done on a per-CRTC basis, so the convert mdp5 to use
drm_crtc_set_max_vblank_count().
This change was tested on a LG Nexus 5 (hammerhead) phone.
Suggested-by: Jeffrey Hugo <jeffrey.l.hugo@gmail.com>
Reviewed-by: Jeffrey Hugo <jeffrey.l.hugo@gmail.com>
Signed-off-by: Brian Masney <masneyb@onstation.org>
Signed-off-by: Sean Paul <seanpaul@chromium.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20190531094619.31704-3-masneyb@onstation.org
Diffstat (limited to 'arch')
0 files changed, 0 insertions, 0 deletions