commit 2c95cfe6c3040bfb9100217dac6709e6d8871d67
author Jayant Shekhar <jshekhar@codeaurora.org> Fri Mar 09 11:14:39 2018 +0530
committer Jayant Shekhar <jshekhar@codeaurora.org> Fri Mar 09 11:39:40 2018 +0530
tree 1745f91fc0e36d87608cfb47af24e3e79c0549e2
parent 85a10b57b5c50f68a9592cbc9ba9d115a78b0342

drm/msm: add debugfs support to change ESD check interval

Add a debugfs entry to change ESD status check interval
from command line. This will help to debug any issues
related to ESD feature in runtime.

Change-Id: I4d056b049a0aa9b741588496d7885c52b444d858
Signed-off-by: Jayant Shekhar <jshekhar@codeaurora.org>

drivers/gpu/drm/msm/sde/sde_connector.c

diff --git a/drivers/gpu/drm/msm/sde/sde_connector.c b/drivers/gpu/drm/msm/sde/sde_connector.c
index 2adae3d..f908e7f 100644
--- a/drivers/gpu/drm/msm/sde/sde_connector.c
+++ b/drivers/gpu/drm/msm/sde/sde_connector.c
@@ -417,13 +417,23 @@
 	sde_connector_get_info(connector, &info);
 	if (c_conn->ops.check_status &&
 		(info.capabilities & MSM_DISPLAY_ESD_ENABLED)) {
-		if (en)
+		if (en) {
+			u32 interval;
+
+			/*
+			 * If debugfs property is not set then take
+			 * default value
+			 */
+			interval = c_conn->esd_status_interval ?
+				c_conn->esd_status_interval :
+					STATUS_CHECK_INTERVAL_MS;
 			/* Schedule ESD status check */
 			schedule_delayed_work(&c_conn->status_work,
-				msecs_to_jiffies(STATUS_CHECK_INTERVAL_MS));
-		else
+				msecs_to_jiffies(interval));
+		} else {
 			/* Cancel any pending ESD status check */
 			cancel_delayed_work_sync(&c_conn->status_work);
+		}
 	}
 }
 
@@ -1542,10 +1552,14 @@
 
 	sde_connector_get_info(connector, &info);
 	if (sde_connector->ops.check_status &&
-		(info.capabilities & MSM_DISPLAY_ESD_ENABLED))
+		(info.capabilities & MSM_DISPLAY_ESD_ENABLED)) {
 		debugfs_create_u32("force_panel_dead", 0600,
 				connector->debugfs_entry,
 				&sde_connector->force_panel_dead);
+		debugfs_create_u32("esd_status_interval", 0600,
+				connector->debugfs_entry,
+				&sde_connector->esd_status_interval);
+	}
 
 	if (!debugfs_create_bool("fb_kmap", 0600, connector->debugfs_entry,
 			&sde_connector->fb_kmap)) {
@@ -1720,10 +1734,16 @@
 	}
 
 	if (rc > 0) {
+		u32 interval;
+
 		SDE_DEBUG("esd check status success conn_id: %d enc_id: %d\n",
 				conn->base.base.id, conn->encoder->base.id);
+
+		/* If debugfs property is not set then take default value */
+		interval = conn->esd_status_interval ?
+			conn->esd_status_interval : STATUS_CHECK_INTERVAL_MS;
 		schedule_delayed_work(&conn->status_work,
-			msecs_to_jiffies(STATUS_CHECK_INTERVAL_MS));
+			msecs_to_jiffies(interval));
 		return;
 	}
 

drivers/gpu/drm/msm/sde/sde_connector.h

diff --git a/drivers/gpu/drm/msm/sde/sde_connector.h b/drivers/gpu/drm/msm/sde/sde_connector.h
index 9c37869..17d200d 100644
--- a/drivers/gpu/drm/msm/sde/sde_connector.h
+++ b/drivers/gpu/drm/msm/sde/sde_connector.h
@@ -307,6 +307,7 @@
  * @bl_device: backlight device node
  * @status_work: work object to perform status checks
  * @force_panel_dead: variable to trigger forced ESD recovery
+ * @esd_status_interval: variable to change ESD check interval in millisec
  * @bl_scale_dirty: Flag to indicate PP BL scale value(s) is changed
  * @bl_scale: BL scale value for ABA feature
  * @bl_scale_ad: BL scale value for AD feature
@@ -347,6 +348,7 @@
 	struct backlight_device *bl_device;
 	struct delayed_work status_work;
 	u32 force_panel_dead;
+	u32 esd_status_interval;
 
 	bool bl_scale_dirty;
 	u32 bl_scale;