drm/omap: hdmi4: Implement drm_bridge .hpd_notify() operation

The HDMI4 encoder is transitioning to the drm_bridge API, implement the
last missing operation.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Tested-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Reviewed-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200226112514.12455-36-laurent.pinchart@ideasonboard.com

drivers/gpu/drm/omapdrm/dss/hdmi4.c

@@ -553,6 +553,15 @@ static void hdmi4_bridge_disable(struct drm_bridge *bridge,
 	mutex_unlock(&hdmi->lock);
 }
 
+static void hdmi4_bridge_hpd_notify(struct drm_bridge *bridge,
+				    enum drm_connector_status status)
+{
+	struct omap_hdmi *hdmi = drm_bridge_to_hdmi(bridge);
+
+	if (status == connector_status_disconnected)
+		hdmi4_cec_set_phys_addr(&hdmi->core, CEC_PHYS_ADDR_INVALID);
+}
+
 static struct edid *hdmi4_bridge_read_edid(struct omap_hdmi *hdmi,
 					   struct drm_connector *connector)
 {
@@ -575,6 +584,7 @@ static const struct drm_bridge_funcs hdmi4_bridge_funcs = {
 	.atomic_reset = drm_atomic_helper_bridge_reset,
 	.atomic_enable = hdmi4_bridge_enable,
 	.atomic_disable = hdmi4_bridge_disable,
+	.hpd_notify = hdmi4_bridge_hpd_notify,
 	.get_edid = hdmi4_bridge_get_edid,
 };