disp: msm: dsi: Send report_panel_dead in underflow or overflow cases

In the case of DSI underflow or overflow, skip enabling back the DSI error
interrupts and instead send panel_dead. The error interrupt will be enabled
later by HAL as part of handling panel_dead event. Not enabling back the
DSI error interrupts immediately can prevent IRQ storm from occurring.

Change-Id: I769872bb5ac9ef8826c3e4caaab7723901dfc7d8
Signed-off-by: Rohith Iyer <quic_rohiiyer@quicinc.com>

msm/dsi/dsi_ctrl.c

@@ -17,6 +17,7 @@
 #include "dsi_ctrl.h"
 #include "dsi_ctrl_hw.h"
 #include "dsi_clk.h"
+#include "dsi_display.h"
 #include "dsi_pwr.h"
 #include "dsi_catalog.h"
 #include "dsi_panel.h"
@@ -2717,6 +2718,8 @@ static void dsi_ctrl_handle_error_status(struct dsi_ctrl *dsi_ctrl,
 				unsigned long error)
 {
 	struct dsi_event_cb_info cb_info;
+	struct dsi_display *display;
+	bool skip_irq_enable = false;
 
 	cb_info = dsi_ctrl->irq_info.irq_err_cb;
 
@@ -2766,6 +2769,9 @@ static void dsi_ctrl_handle_error_status(struct dsi_ctrl *dsi_ctrl,
 						cb_info.event_idx,
 						dsi_ctrl->cell_index,
 						0, 0, 0, 0);
+			display = cb_info.event_usr_ptr;
+			dsi_display_report_dead(display);
+			skip_irq_enable = true;
 		}
 	}
 
@@ -2777,6 +2783,9 @@ static void dsi_ctrl_handle_error_status(struct dsi_ctrl *dsi_ctrl,
 						cb_info.event_idx,
 						dsi_ctrl->cell_index,
 						0, 0, 0, 0);
+			display = cb_info.event_usr_ptr;
+			dsi_display_report_dead(display);
+			skip_irq_enable = true;
 		}
 	}
 
@@ -2802,7 +2811,7 @@ static void dsi_ctrl_handle_error_status(struct dsi_ctrl *dsi_ctrl,
 	}
 
 	/* enable back DSI interrupts */
-	if (dsi_ctrl->hw.ops.error_intr_ctrl)
+	if (dsi_ctrl->hw.ops.error_intr_ctrl && !skip_irq_enable)
 		dsi_ctrl->hw.ops.error_intr_ctrl(&dsi_ctrl->hw, true);
 }
 

msm/dsi/dsi_display.c

@@ -9131,6 +9131,16 @@ int dsi_display_unprepare(struct dsi_display *display)
 	return rc;
 }
 
+void dsi_display_report_dead(struct dsi_display *display)
+{
+	struct sde_connector *c_conn = to_sde_connector(display->drm_conn);
+
+	/* disable work queue */
+	sde_connector_schedule_status_work(display->drm_conn, false);
+
+	sde_connector_report_panel_dead(c_conn, false);
+}
+
 void __init dsi_display_register(void)
 {
 	dsi_phy_drv_register();

msm/dsi/dsi_display.h

@@ -848,4 +848,11 @@ int dsi_display_update_transfer_time(void *display, u32 transfer_time);
  */
 int dsi_display_get_panel_scan_line(void *display, u16 *scan_line, ktime_t *scan_line_ts);
 
+/**
+ * dsi_display_report_dead() - report panel dead and cancel work queue
+ * @display:     handle to display
+ *
+ */
+void dsi_display_report_dead(struct dsi_display *display);
+
 #endif /* _DSI_DISPLAY_H_ */

msm/sde/sde_connector.c

@@ -2784,7 +2784,7 @@ static int sde_connector_atomic_check(struct drm_connector *connector,
 	return 0;
 }
 
-static void _sde_connector_report_panel_dead(struct sde_connector *conn,
+void sde_connector_report_panel_dead(struct sde_connector *conn,
 	bool skip_pre_kickoff)
 {
 	struct drm_event event;
@@ -2865,7 +2865,7 @@ int sde_connector_esd_status(struct drm_connector *conn)
 	if (ret <= 0) {
 		/* cancel if any pending esd work */
 		sde_connector_schedule_status_work(conn, false);
-		_sde_connector_report_panel_dead(sde_conn, true);
+		sde_connector_report_panel_dead(sde_conn, true);
 		ret = -ETIMEDOUT;
 	} else {
 		SDE_DEBUG("Successfully received TE from panel\n");
@@ -2916,7 +2916,7 @@ static void sde_connector_check_status_work(struct work_struct *work)
 		return;
 	}
 
-	_sde_connector_report_panel_dead(conn, false);
+	sde_connector_report_panel_dead(conn, false);
 }
 
 static const struct drm_connector_helper_funcs sde_connector_helper_ops = {

msm/sde/sde_connector.h

@@ -1386,4 +1386,11 @@ const char *sde_conn_get_topology_name(struct drm_connector *conn,
  */
 bool sde_connector_is_line_insertion_supported(struct sde_connector *sde_conn);
 
+/*
+ * sde_connector_report_panel_dead - report panel dead notification
+ * @sde_conn:    Pointer to sde connector structure
+ * @skip_pre_kickoff: boolean to skip pre kickoff
+ */
+void sde_connector_report_panel_dead(struct sde_connector *conn, bool skip_pre_kickoff);
+
 #endif /* _SDE_CONNECTOR_H_ */