[PATCH 01/19] drm/msm/dp: Track when DP is physically plugged in

[Jessica Zhang <jessica.zhang@oss.qualcomm.com>]

Add a boolean to track whether the DP cable is physically plugged in.

Signed-off-by: Jessica Zhang <jessica.zhang@oss.qualcomm.com>
---
 drivers/gpu/drm/msm/dp/dp_display.c | 11 ++++++++++-
 drivers/gpu/drm/msm/dp/dp_display.h |  1 +
 2 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c
index d87d47cc7ec3..6945df782f7b 100644
--- a/drivers/gpu/drm/msm/dp/dp_display.c
+++ b/drivers/gpu/drm/msm/dp/dp_display.c
@@ -531,6 +531,7 @@ static int msm_dp_display_handle_port_status_changed(struct msm_dp_display_priva
 			rc = msm_dp_display_process_hpd_high(dp);
 			if (rc)
 				dp->hpd_state = ST_DISCONNECTED;
+			dp->msm_dp_display.connected = true;
 		}
 	}
 
@@ -604,6 +605,8 @@ static int msm_dp_hpd_plug_handle(struct msm_dp_display_private *dp, u32 data)
 		return 0;
 	}
 
+	dp->msm_dp_display.connected = true;
+
 	if (state == ST_DISCONNECT_PENDING) {
 		/* wait until ST_DISCONNECTED */
 		msm_dp_add_event(dp, EV_HPD_PLUG_INT, 0, 1); /* delay = 1 */
@@ -621,6 +624,7 @@ static int msm_dp_hpd_plug_handle(struct msm_dp_display_private *dp, u32 data)
 	ret = msm_dp_display_usbpd_configure_cb(&pdev->dev);
 	if (ret) {	/* link train failed */
 		dp->hpd_state = ST_DISCONNECTED;
+		dp->msm_dp_display.connected = false;
 		pm_runtime_put_sync(&pdev->dev);
 	} else {
 		dp->hpd_state = ST_MAINLINK_READY;
@@ -662,6 +666,8 @@ static int msm_dp_hpd_unplug_handle(struct msm_dp_display_private *dp, u32 data)
 	drm_dbg_dp(dp->drm_dev, "Before, type=%d hpd_state=%d\n",
 			dp->msm_dp_display.connector_type, state);
 
+	dp->msm_dp_display.connected = false;
+
 	/* unplugged, no more irq_hpd handle */
 	msm_dp_del_event(dp, EV_IRQ_HPD_INT);
 
@@ -680,6 +686,7 @@ static int msm_dp_hpd_unplug_handle(struct msm_dp_display_private *dp, u32 data)
 		msm_dp_ctrl_off_link(dp->ctrl);
 		msm_dp_display_host_phy_exit(dp);
 		dp->hpd_state = ST_DISCONNECTED;
+		dp->msm_dp_display.connected = false;
 		msm_dp_display_notify_disconnect(&dp->msm_dp_display.pdev->dev);
 		pm_runtime_put_sync(&pdev->dev);
 		mutex_unlock(&dp->event_mutex);
@@ -1596,8 +1603,10 @@ void msm_dp_bridge_atomic_enable(struct drm_bridge *drm_bridge,
 		return;
 	}
 
-	if (dp->is_edp)
+	if (dp->is_edp) {
 		msm_dp_hpd_plug_handle(msm_dp_display, 0);
+		dp->connected = true;
+	}
 
 	mutex_lock(&msm_dp_display->event_mutex);
 	if (pm_runtime_resume_and_get(&dp->pdev->dev)) {
diff --git a/drivers/gpu/drm/msm/dp/dp_display.h b/drivers/gpu/drm/msm/dp/dp_display.h
index cc6e2cab36e9..68bd8be19463 100644
--- a/drivers/gpu/drm/msm/dp/dp_display.h
+++ b/drivers/gpu/drm/msm/dp/dp_display.h
@@ -16,6 +16,7 @@ struct msm_dp {
 	struct platform_device *pdev;
 	struct drm_connector *connector;
 	struct drm_bridge *next_bridge;
+	bool connected;
 	bool link_ready;
 	bool audio_enabled;
 	bool power_on;

-- 
2.50.1