drm/msm/dp: use drm_bridge_hpd_notify() to report HPD status changes

Currently DP driver use drm_helper_hpd_irq_event(), bypassing drm bridge
framework, to report HPD status changes to user space frame work.
Replace it with drm_bridge_hpd_notify() since DP driver is part of drm
bridge.

Signed-off-by: Kuogee Hsieh <quic_khsieh@quicinc.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Patchwork: https://patchwork.freedesktop.org/patch/570067/
Link: https://lore.kernel.org/r/1701472789-25951-4-git-send-email-quic_khsieh@quicinc.com
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>

drivers/gpu/drm/msm/dp/dp_display.c

@@ -340,26 +340,10 @@ static const struct component_ops dp_display_comp_ops = {
 	.unbind = dp_display_unbind,
 };
 
-static void dp_display_send_hpd_event(struct msm_dp *dp_display)
-{
-	struct dp_display_private *dp;
-	struct drm_connector *connector;
-
-	dp = container_of(dp_display, struct dp_display_private, dp_display);
-
-	connector = dp->dp_display.connector;
-	drm_helper_hpd_irq_event(connector->dev);
-}
-
 static int dp_display_send_hpd_notification(struct dp_display_private *dp,
 					    bool hpd)
 {
-	if ((hpd && dp->dp_display.link_ready) ||
-			(!hpd && !dp->dp_display.link_ready)) {
-		drm_dbg_dp(dp->drm_dev, "HPD already %s\n",
-				(hpd ? "on" : "off"));
-		return 0;
-	}
+	struct drm_bridge *bridge = dp->dp_display.bridge;
 
 	/* reset video pattern flag on disconnect */
 	if (!hpd) {
@@ -373,7 +357,7 @@ static int dp_display_send_hpd_notification(struct dp_display_private *dp,
 
 	drm_dbg_dp(dp->drm_dev, "type=%d hpd=%d\n",
 			dp->dp_display.connector_type, hpd);
-	dp_display_send_hpd_event(&dp->dp_display);
+	drm_bridge_hpd_notify(bridge, dp->dp_display.link_ready);
 
 	return 0;
 }