disp: msm: sde: report intf interrupt status during underrun

Add the INTF interrupt status register value to the underrun
line count event log to assist in debugging these issues.

Change-Id: I847cb12f8b4565d5f04667e0abda5d051a6194b2
Signed-off-by: Steve Cohen <[email protected]>

msm/sde/sde_encoder_phys_vid.c

@@ -1198,6 +1198,7 @@ static u32 sde_encoder_phys_vid_get_underrun_line_count(
 		struct sde_encoder_phys *phys_enc)
 {
 	u32 underrun_linecount = 0xebadebad;
+	u32 intf_intr_status = 0xebadebad;
 	struct intf_status intf_status = {0};
 
 	if (!phys_enc)
@@ -1215,8 +1216,13 @@ static u32 sde_encoder_phys_vid_get_underrun_line_count(
 		  phys_enc->hw_intf->ops.get_underrun_line_count(
 			phys_enc->hw_intf);
 
+	if (phys_enc->hw_intf->ops.get_intr_status)
+		intf_intr_status = phys_enc->hw_intf->ops.get_intr_status(
+				phys_enc->hw_intf);
+
 	SDE_EVT32(DRMID(phys_enc->parent), underrun_linecount,
-		intf_status.frame_count, intf_status.line_count);
+		intf_status.frame_count, intf_status.line_count,
+		intf_intr_status);
 
 	return underrun_linecount;
 }

msm/sde/sde_hw_intf.c

@@ -531,6 +531,14 @@ static u32 sde_hw_intf_get_underrun_line_count(struct sde_hw_intf *intf)
 		0xebadebad;
 }
 
+static u32 sde_hw_intf_get_intr_status(struct sde_hw_intf *intf)
+{
+	if (!intf)
+		return -EINVAL;
+
+	return SDE_REG_READ(&intf->hw, INTF_INTR_STATUS);
+}
+
 static int sde_hw_intf_setup_te_config(struct sde_hw_intf *intf,
 		struct sde_hw_tear_check *te)
 {
@@ -783,6 +791,7 @@ static void _setup_intf_ops(struct sde_hw_intf_ops *ops,
 	ops->collect_misr = sde_hw_intf_collect_misr;
 	ops->get_line_count = sde_hw_intf_get_line_count;
 	ops->get_underrun_line_count = sde_hw_intf_get_underrun_line_count;
+	ops->get_intr_status = sde_hw_intf_get_intr_status;
 	ops->avr_setup = sde_hw_intf_avr_setup;
 	ops->avr_trigger = sde_hw_intf_avr_trigger;
 	ops->avr_ctrl = sde_hw_intf_avr_ctrl;

msm/sde/sde_hw_intf.h

@@ -206,6 +206,11 @@ struct sde_hw_intf_ops {
 	 * Enable processing of 2 pixels per clock
 	 */
 	void (*enable_wide_bus)(struct sde_hw_intf *intf, bool enable);
+
+	/**
+	 * Get the INTF interrupt status
+	 */
+	u32 (*get_intr_status)(struct sde_hw_intf *intf);
 };
 
 struct sde_hw_intf {