diff options
| author | Sean Paul <seanpaul@chromium.org> | 2018-07-03 12:56:03 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-09-05 09:19:59 +0200 |
| commit | fa1c6d2371b170a8c89de50b25612673080620c8 (patch) | |
| tree | 33948b1a7dade0004a100666fae16a9616d40228 /drivers/gpu | |
| parent | 4fd089723f6f4bd77c67134c3643b37033e61b4d (diff) | |
drm/bridge: adv7511: Reset registers on hotplug
[ Upstream commit 5f3417569165a8ee57654217f73e0160312f409c ]
The bridge loses its hw state when the cable is unplugged. If we detect
this case in the hpd handler, reset its state.
Reported-by: Rob Clark <robdclark@gmail.com>
Tested-by: Rob Clark <robdclark@gmail.com>
Reviewed-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Sean Paul <seanpaul@chromium.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20180703165648.120401-1-seanpaul@chromium.org
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/gpu')
| -rw-r--r-- | drivers/gpu/drm/bridge/adv7511/adv7511_drv.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c b/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c index a68f94daf9b6..32ab5c32834b 100644 --- a/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c +++ b/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c @@ -424,6 +424,18 @@ static void adv7511_hpd_work(struct work_struct *work) else status = connector_status_disconnected; + /* + * The bridge resets its registers on unplug. So when we get a plug + * event and we're already supposed to be powered, cycle the bridge to + * restore its state. + */ + if (status == connector_status_connected && + adv7511->connector.status == connector_status_disconnected && + adv7511->powered) { + regcache_mark_dirty(adv7511->regmap); + adv7511_power_on(adv7511); + } + if (adv7511->connector.status != status) { adv7511->connector.status = status; drm_kms_helper_hotplug_event(adv7511->connector.dev); |