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drm/rockchip: cdn-dp: do not use drm_helper_hpd_irq_event 

The cdn_dp_pd_event_work is using drm_helper_hpd_irq_event to update the
connector status, this function is used to update all connectors of
drm_device. Therefore, the detect of other connector will be call, when
cdn_dp_pd_event_work is triggered, every time. It is not necessary, and
it may cause system crash. replace drm_helper_hpd_irq_event with
drm_kms_helper_hotplug_event, only update cdn-dp status.

Signed-off-by: Chris Zhong <zyw@rock-chips.com>
Tested-by: Guenter Roeck <groeck@chromium.org>
Reviewed-by: Guenter Roeck <groeck@chromium.org>
This commit is contained in:
Chris Zhong 2017-02-05 15:54:59 +08:00 committed by Mark Yao
parent 5eb2e6ee97
commit 81632df697
1 changed files with 8 additions and 1 deletions
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9
drivers/gpu/drm/rockchip/cdn-dp-core.c
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@ -935,6 +935,9 @@ static void cdn_dp_pd_event_work(struct work_struct *work)
{
struct cdn_dp_device *dp = container_of(work, struct cdn_dp_device,
event_work);
struct drm_connector *connector = &dp->connector;
enum drm_connector_status old_status;
int ret;
u8 sink_count;
@ -997,7 +1000,11 @@ static void cdn_dp_pd_event_work(struct work_struct *work)
out:
mutex_unlock(&dp->lock);
drm_helper_hpd_irq_event(dp->drm_dev);
old_status = connector->status;
connector->status = connector->funcs->detect(connector, false);
if (old_status != connector->status)
drm_kms_helper_hotplug_event(dp->drm_dev);
}
static int cdn_dp_pd_event(struct notifier_block *nb,