[PATCH v2 02/10] drm: bridge: dw_hdmi: Only notify connected status on HPD interrupt

[Jonas Karlman]

drm_helper_hpd_irq_event() and drm_bridge_hpd_notify() may incorrectly
be called with a connected status when HPD is high and RX sense is
changed. This typically happen when the HDMI cable is unplugged, shortly
before the HPD is changed to low.

Fix this by only notify connected status on the HPD interrupt when HPD
is going high, not on the RX sense interrupt when RX sense is changed.

Fixes: da09daf88108 ("drm: bridge: dw_hdmi: only trigger hotplug event on link change")
Signed-off-by: Jonas Karlman <jonas at kwiboo.se>
---
v2: New patch
---
 drivers/gpu/drm/bridge/synopsys/dw-hdmi.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
index 9e7f86a0bf5c..055fc9848df4 100644
--- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
+++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
@@ -3123,7 +3123,8 @@ static irqreturn_t dw_hdmi_irq(int irq, void *dev_id)
 			mutex_unlock(&hdmi->cec_notifier_mutex);
 		}
 
-		if (phy_stat & HDMI_PHY_HPD)
+		if ((intr_stat & HDMI_IH_PHY_STAT0_HPD) &&
+		    (phy_stat & HDMI_PHY_HPD))
 			status = connector_status_connected;
 
 		if (!(phy_stat & (HDMI_PHY_HPD | HDMI_PHY_RX_SENSE)))
-- 
2.46.0