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Commit 5f341756 authored by Sean Paul's avatar Sean Paul
Browse files

drm/bridge: adv7511: Reset registers on hotplug 



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: default avatarRob Clark <robdclark@gmail.com>
Tested-by: default avatarRob Clark <robdclark@gmail.com>
Reviewed-by: default avatarArchit Taneja <architt@codeaurora.org>
Signed-off-by: default avatarSean Paul <seanpaul@chromium.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20180703165648.120401-1-seanpaul@chromium.org
parent 3156b53c

drivers/gpu/drm/bridge/adv7511/adv7511_drv.c

+12 −0
Original line number Diff line number Diff line
@@ -429,6 +429,18 @@ 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;

		if (status == connector_status_disconnected)