patches.baytrail/0992-drm-edid-add-drm_edid_duplicate.patch

From 13c2c819776a597b79d2d9706823779ddaad8402 Mon Sep 17 00:00:00 2001
From: Jani Nikula <jani.nikula@intel.com>
Date: Fri, 27 Sep 2013 15:08:27 +0300
Subject: drm/edid: add drm_edid_duplicate

We have some code duplication related to EDID duplication. Add a helper.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
(cherry picked from commit 51f8da5916f85c18b696f74f97970e5a7330147e)
Signed-off-by: Darren Hart <dvhart@linux.intel.com>
---
 drivers/gpu/drm/drm_edid.c |   12 ++++++++++++
 include/drm/drm_crtc.h     |    1 +
 2 files changed, 13 insertions(+)

--- a/drivers/gpu/drm/drm_edid.c
+++ b/drivers/gpu/drm/drm_edid.c
@@ -1266,6 +1266,18 @@ struct edid *drm_get_edid(struct drm_con
 }
 EXPORT_SYMBOL(drm_get_edid);
 
+/**
+ * drm_edid_duplicate - duplicate an EDID and the extensions
+ * @edid: EDID to duplicate
+ *
+ * Return duplicate edid or NULL on allocation failure.
+ */
+struct edid *drm_edid_duplicate(const struct edid *edid)
+{
+	return kmemdup(edid, (edid->extensions + 1) * EDID_LENGTH, GFP_KERNEL);
+}
+EXPORT_SYMBOL(drm_edid_duplicate);
+
 /*** EDID parsing ***/
 
 /**
--- a/include/drm/drm_crtc.h
+++ b/include/drm/drm_crtc.h
@@ -919,6 +919,7 @@ extern int drm_mode_group_init_legacy_gr
 extern bool drm_probe_ddc(struct i2c_adapter *adapter);
 extern struct edid *drm_get_edid(struct drm_connector *connector,
 				 struct i2c_adapter *adapter);
+extern struct edid *drm_edid_duplicate(const struct edid *edid);
 extern int drm_add_edid_modes(struct drm_connector *connector, struct edid *edid);
 extern void drm_mode_probed_add(struct drm_connector *connector, struct drm_display_mode *mode);
 extern void drm_mode_remove(struct drm_connector *connector, struct drm_display_mode *mode);