1 files changed, 26 insertions, 16 deletions

diff --git a/drivers/gpu/drm/drm_debugfs.c b/drivers/gpu/drm/drm_debugfs.c
index 7f1b82dbaebb..493922069c90 100644
--- a/drivers/gpu/drm/drm_debugfs.c
+++ b/drivers/gpu/drm/drm_debugfs.c
@@ -350,31 +350,20 @@ static ssize_t edid_write(struct file *file, const char __user *ubuf,
 	struct seq_file *m = file->private_data;
 	struct drm_connector *connector = m->private;
 	char *buf;
-	struct edid *edid;
 	int ret;
 
 	buf = memdup_user(ubuf, len);
 	if (IS_ERR(buf))
 		return PTR_ERR(buf);
 
-	edid = (struct edid *) buf;
-
-	if (len == 5 && !strncmp(buf, "reset", 5)) {
-		connector->override_edid = false;
-		ret = drm_connector_update_edid_property(connector, NULL);
-	} else if (len < EDID_LENGTH ||
-		   EDID_LENGTH * (1 + edid->extensions) > len)
-		ret = -EINVAL;
-	else {
-		connector->override_edid = false;
-		ret = drm_connector_update_edid_property(connector, edid);
-		if (!ret)
-			connector->override_edid = true;
-	}
+	if (len == 5 && !strncmp(buf, "reset", 5))
+		ret = drm_edid_override_reset(connector);
+	else
+		ret = drm_edid_override_set(connector, buf, len);
 
 	kfree(buf);
 
-	return (ret) ? ret : len;
+	return ret ? ret : len;
 }
 
 /*
@@ -395,6 +384,23 @@ static int vrr_range_show(struct seq_file *m, void *data)
 }
 DEFINE_SHOW_ATTRIBUTE(vrr_range);
 
+/*
+ * Returns Connector's max supported bpc through debugfs file.
+ * Example usage: cat /sys/kernel/debug/dri/0/DP-1/output_bpc
+ */
+static int output_bpc_show(struct seq_file *m, void *data)
+{
+	struct drm_connector *connector = m->private;
+
+	if (connector->status != connector_status_connected)
+		return -ENODEV;
+
+	seq_printf(m, "Maximum: %u\n", connector->display_info.bpc);
+
+	return 0;
+}
+DEFINE_SHOW_ATTRIBUTE(output_bpc);
+
 static const struct file_operations drm_edid_fops = {
 	.owner = THIS_MODULE,
 	.open = edid_open,
@@ -437,6 +443,10 @@ void drm_debugfs_connector_add(struct drm_connector *connector)
 	debugfs_create_file("vrr_range", S_IRUGO, root, connector,
 			    &vrr_range_fops);
 
+	/* max bpc */
+	debugfs_create_file("output_bpc", 0444, root, connector,
+			    &output_bpc_fops);
+
 	if (connector->funcs->debugfs_init)
 		connector->funcs->debugfs_init(connector, root);
 }