drm/msm/dp: move debugfs node to /sys/kernel/debug/dri/*/

Move the MSM DP debugfs node from /sys/kernel/debug/drm_dp
to /sys/kernel/debug/dri/*/ as required for video pattern
compliance test suite.

Changes in v2: rebase on top of latest patchset of dependency

Signed-off-by: Abhinav Kumar <abhinavk@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@chromium.org>

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

@@ -7,6 +7,7 @@
 
 #include <linux/debugfs.h>
 #include <drm/drm_connector.h>
+#include <drm/drm_file.h>
 
 #include "dp_parser.h"
 #include "dp_catalog.h"
@@ -15,7 +16,7 @@
 #include "dp_debug.h"
 #include "dp_display.h"
 
-#define DEBUG_NAME "drm_dp"
+#define DEBUG_NAME "msm_dp"
 
 struct dp_debug_private {
 	struct dentry *root;
@@ -25,6 +26,7 @@ struct dp_debug_private {
 	struct dp_panel *panel;
 	struct drm_connector **connector;
 	struct device *dev;
+	struct drm_device *drm_dev;
 
 	struct dp_debug dp_debug;
 };
@@ -206,41 +208,29 @@ static const struct file_operations dp_debug_fops = {
 	.read = dp_debug_read_info,
 };
 
-static int dp_debug_init(struct dp_debug *dp_debug)
+static int dp_debug_init(struct dp_debug *dp_debug, struct drm_minor *minor)
 {
 	int rc = 0;
 	struct dp_debug_private *debug = container_of(dp_debug,
 			struct dp_debug_private, dp_debug);
-	struct dentry *dir, *file;
+	struct dentry *file;
 
-	dir = debugfs_create_dir(DEBUG_NAME, NULL);
-	if (IS_ERR_OR_NULL(dir)) {
-		rc = PTR_ERR(dir);
-		DRM_ERROR("[%s] debugfs create dir failed, rc = %d\n",
-				  DEBUG_NAME, rc);
-		goto error;
-	}
-
-	file = debugfs_create_file("dp_debug", 0444, dir,
+	file = debugfs_create_file("dp_debug", 0444, minor->debugfs_root,
 			debug, &dp_debug_fops);
 	if (IS_ERR_OR_NULL(file)) {
 		rc = PTR_ERR(file);
 		DRM_ERROR("[%s] debugfs create file failed, rc=%d\n",
 				  DEBUG_NAME, rc);
-		goto error_remove_dir;
 	}
 
-	debug->root = dir;
-	return rc;
- error_remove_dir:
-	debugfs_remove(dir);
- error:
+	debug->root = minor->debugfs_root;
+
 	return rc;
 }
 
 struct dp_debug *dp_debug_get(struct device *dev, struct dp_panel *panel,
 		struct dp_usbpd *usbpd, struct dp_link *link,
-		struct drm_connector **connector)
+		struct drm_connector **connector, struct drm_minor *minor)
 {
 	int rc = 0;
 	struct dp_debug_private *debug;
@@ -263,6 +253,7 @@ struct dp_debug *dp_debug_get(struct device *dev, struct dp_panel *panel,
 	debug->link = link;
 	debug->panel = panel;
 	debug->dev = dev;
+	debug->drm_dev = minor->dev;
 	debug->connector = connector;
 
 	dp_debug = &debug->dp_debug;
@@ -270,7 +261,7 @@ struct dp_debug *dp_debug_get(struct device *dev, struct dp_panel *panel,
 	dp_debug->hdisplay = 0;
 	dp_debug->vrefresh = 0;
 
-	rc = dp_debug_init(dp_debug);
+	rc = dp_debug_init(dp_debug, minor);
 	if (rc) {
 		devm_kfree(dev, debug);
 		goto error;

drivers/gpu/drm/msm/dp/dp_debug.h

@@ -35,6 +35,7 @@ struct dp_debug {
  * @usbpd: instance of usbpd module
  * @link: instance of link module
  * @connector: double pointer to display connector
+ * @minor: pointer to drm minor number after device registration
  * return: pointer to allocated debug module data
  *
  * This function sets up the debug module and provides a way
@@ -42,7 +43,9 @@ struct dp_debug {
  */
 struct dp_debug *dp_debug_get(struct device *dev, struct dp_panel *panel,
 		struct dp_usbpd *usbpd, struct dp_link *link,
-		struct drm_connector **connector);
+		struct drm_connector **connector,
+		struct drm_minor *minor);
+
 /**
  * dp_debug_put()
  *

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

@@ -229,10 +229,8 @@ static int dp_display_bind(struct device *dev, struct device *master,
 	}
 
 	rc = dp_register_audio_driver(dev, dp->audio);
-	if (rc) {
+	if (rc)
 		DRM_ERROR("Audio registration Dp failed\n");
-		goto end;
-	}
 
 end:
 	return rc;
@@ -773,19 +771,8 @@ static int dp_init_sub_modules(struct dp_display_private *dp)
 		goto error_audio;
 	}
 
-	dp->debug = dp_debug_get(dev, dp->panel, dp->usbpd,
-			dp->link, &dp->dp_display.connector);
-	if (IS_ERR(dp->debug)) {
-		rc = PTR_ERR(dp->debug);
-		DRM_ERROR("failed to initialize debug, rc = %d\n", rc);
-		dp->debug = NULL;
-		goto error_debug;
-	}
-
 	return rc;
 
-error_debug:
-	dp_audio_put(dp->audio);
 error_audio:
 	dp_ctrl_put(dp->ctrl);
 error_ctrl:
@@ -1299,6 +1286,25 @@ void msm_dp_irq_postinstall(struct msm_dp *dp_display)
 	dp_add_event(dp, EV_HPD_INIT_SETUP, 0, 100);
 }
 
+void msm_dp_debugfs_init(struct msm_dp *dp_display, struct drm_minor *minor)
+{
+	struct dp_display_private *dp;
+	struct device *dev;
+	int rc;
+
+	dp = container_of(dp_display, struct dp_display_private, dp_display);
+	dev = &dp->pdev->dev;
+
+	dp->debug = dp_debug_get(dev, dp->panel, dp->usbpd,
+					dp->link, &dp->dp_display.connector,
+					minor);
+	if (IS_ERR(dp->debug)) {
+		rc = PTR_ERR(dp->debug);
+		DRM_ERROR("failed to initialize debug, rc = %d\n", rc);
+		dp->debug = NULL;
+	}
+}
+
 int msm_dp_modeset_init(struct msm_dp *dp_display, struct drm_device *dev,
 			struct drm_encoder *encoder)
 {