[PATCH 5/6] drm/edid: add a helper for EDID sysfs property show

[Jani Nikula]

Add a helper to get the EDID property for sysfs property show. This
hides all the edid_blob_ptr usage within drm_edid.c.

Signed-off-by: Jani Nikula <jani.nikula at intel.com>
---
 drivers/gpu/drm/drm_crtc_internal.h |  2 ++
 drivers/gpu/drm/drm_edid.c          | 33 +++++++++++++++++++++++++++++
 drivers/gpu/drm/drm_sysfs.c         | 24 ++-------------------
 3 files changed, 37 insertions(+), 22 deletions(-)

diff --git a/drivers/gpu/drm/drm_crtc_internal.h b/drivers/gpu/drm/drm_crtc_internal.h
index a514d5207e41..52907c3b2846 100644
--- a/drivers/gpu/drm/drm_crtc_internal.h
+++ b/drivers/gpu/drm/drm_crtc_internal.h
@@ -292,6 +292,8 @@ void drm_mode_fixup_1366x768(struct drm_display_mode *mode);
 int drm_edid_override_show(struct drm_connector *connector, struct seq_file *m);
 int drm_edid_override_set(struct drm_connector *connector, const void *edid, size_t size);
 int drm_edid_override_reset(struct drm_connector *connector);
+ssize_t drm_edid_connector_property_show(struct drm_connector *connector,
+					 char *buf, loff_t off, size_t count);
 
 /* drm_edid_load.c */
 #ifdef CONFIG_DRM_LOAD_EDID_FIRMWARE
diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
index 923c4423151c..9178644ac285 100644
--- a/drivers/gpu/drm/drm_edid.c
+++ b/drivers/gpu/drm/drm_edid.c
@@ -6831,6 +6831,39 @@ static int _drm_edid_connector_property_update(struct drm_connector *connector,
 	return ret;
 }
 
+/* For sysfs edid show implementation */
+ssize_t drm_edid_connector_property_show(struct drm_connector *connector,
+					 char *buf, loff_t off, size_t count)
+{
+	const void *edid;
+	size_t size;
+	ssize_t ret = 0;
+
+	mutex_lock(&connector->dev->mode_config.mutex);
+
+	if (!connector->edid_blob_ptr)
+		goto unlock;
+
+	edid = connector->edid_blob_ptr->data;
+	size = connector->edid_blob_ptr->length;
+	if (!edid)
+		goto unlock;
+
+	if (off >= size)
+		goto unlock;
+
+	if (off + count > size)
+		count = size - off;
+
+	memcpy(buf, edid + off, count);
+
+	ret = count;
+unlock:
+	mutex_unlock(&connector->dev->mode_config.mutex);
+
+	return ret;
+}
+
 /**
  * drm_edid_connector_update - Update connector information from EDID
  * @connector: Connector
diff --git a/drivers/gpu/drm/drm_sysfs.c b/drivers/gpu/drm/drm_sysfs.c
index a953f69a34b6..71a741991fc6 100644
--- a/drivers/gpu/drm/drm_sysfs.c
+++ b/drivers/gpu/drm/drm_sysfs.c
@@ -267,29 +267,9 @@ static ssize_t edid_show(struct file *filp, struct kobject *kobj,
 {
 	struct device *connector_dev = kobj_to_dev(kobj);
 	struct drm_connector *connector = to_drm_connector(connector_dev);
-	unsigned char *edid;
-	size_t size;
-	ssize_t ret = 0;
+	ssize_t ret;
 
-	mutex_lock(&connector->dev->mode_config.mutex);
-	if (!connector->edid_blob_ptr)
-		goto unlock;
-
-	edid = connector->edid_blob_ptr->data;
-	size = connector->edid_blob_ptr->length;
-	if (!edid)
-		goto unlock;
-
-	if (off >= size)
-		goto unlock;
-
-	if (off + count > size)
-		count = size - off;
-	memcpy(buf, edid + off, count);
-
-	ret = count;
-unlock:
-	mutex_unlock(&connector->dev->mode_config.mutex);
+	ret = drm_edid_connector_property_show(connector, buf, off, count);
 
 	return ret;
 }
-- 
2.39.2