[PATCH v17 4/7] drm/rockchip: cdn-dp: do not use drm_helper_hpd_irq_event

Chris Zhong
2017-02-05T07:54:59Z

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>
---

Changes in v17: None

drivers/gpu/drm/rockchip/cdn-dp-core.c | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/rockchip/cdn-dp-core.c b/drivers/gpu/drm/rockchip/cdn-dp-core.c
index a70eedc..62e02a4 100644
--- a/drivers/gpu/drm/rockchip/cdn-dp-core.c
+++ b/drivers/gpu/drm/rockchip/cdn-dp-core.c
@@ -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,
--
2.6.3