From 51f8da5916f85c18b696f74f97970e5a7330147e Mon Sep 17 00:00:00 2001 From: Jani Nikula Date: Fri, 27 Sep 2013 15:08:27 +0300 Subject: [PATCH] drm/edid: add drm_edid_duplicate We have some code duplication related to EDID duplication. Add a helper. Signed-off-by: Jani Nikula Signed-off-by: Dave Airlie --- 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 1688ff500513..3140a30aa818 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 24f499569a2f..92e782060199 100644 --- a/include/drm/drm_crtc.h +++ b/include/drm/drm_crtc.h @@ -964,6 +964,7 @@ 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); -- GitLab