[PATCH 1/3] drm/edid: add drm_edid_duplicate

Jani Nikula
2013-09-27T12:08:27Z

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

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
---
drivers/gpu/drm/drm_edid.c | 12 ++++++++++++
include/drm/drm_crtc.h | 1 +
2 files changed, 13 insertions(+)

diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
index c24af1d..412b80f 100644
--- a/drivers/gpu/drm/drm_edid.c
+++ b/drivers/gpu/drm/drm_edid.c
@@ -1264,6 +1264,18 @@ struct edid *drm_get_edid(struct drm_connector *connector,
}
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 ***/

/**
diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h
index b2d08ca..8ab633a 100644
--- a/include/drm/drm_crtc.h
+++ b/include/drm/drm_crtc.h
@@ -980,6 +980,7 @@ extern int drm_mode_group_init_legacy_group(struct drm_device *dev, struct drm_m
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_copy(struct drm_display_mode *dst, const struct drm_display_mode *src);
--
1.7.9.5