drm/bridge: adv7511: Reset registers on hotplug
[ Upstream commit 5f34175691
]
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>
pull/10/head
parent
7cb625dd9e
commit
384f0d9fe4
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@ -424,6 +424,18 @@ static void adv7511_hpd_work(struct work_struct *work)
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else
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status = connector_status_disconnected;
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/*
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* The bridge resets its registers on unplug. So when we get a plug
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* event and we're already supposed to be powered, cycle the bridge to
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* restore its state.
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*/
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if (status == connector_status_connected &&
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adv7511->connector.status == connector_status_disconnected &&
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adv7511->powered) {
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regcache_mark_dirty(adv7511->regmap);
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adv7511_power_on(adv7511);
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}
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if (adv7511->connector.status != status) {
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adv7511->connector.status = status;
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drm_kms_helper_hotplug_event(adv7511->connector.dev);
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