[PATCH RFC 1/5] drm/edid: Add support to get edid early

From: Srinivas Kandagatla
Date: Fri Aug 14 2015 - 11:50:15 EST

This patch adds support to get edid way early before the connector is
created, this is mainly used for panel drivers to auto-probe the panel
based on the vendor and product id from EDID.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@xxxxxxxxxx>
drivers/gpu/drm/drm_edid.c | 8 ++++++++
include/drm/drm_crtc.h | 1 +
2 files changed, 9 insertions(+)

diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
index 7087da3..30359cd 100644
--- a/drivers/gpu/drm/drm_edid.c
+++ b/drivers/gpu/drm/drm_edid.c
@@ -1388,6 +1388,14 @@ struct edid *drm_get_edid(struct drm_connector *connector,

+struct edid *drm_get_edid_early(struct i2c_adapter *adapter)
+ struct drm_connector dummy_connector;
+ return drm_get_edid(&dummy_connector, adapter);
* drm_edid_duplicate - duplicate an EDID and the extensions
* @edid: EDID to duplicate
diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h
index 57ca8cc..35d8763 100644
--- a/include/drm/drm_crtc.h
+++ b/include/drm/drm_crtc.h
@@ -1330,6 +1330,7 @@ extern void drm_reinit_primary_mode_group(struct drm_device *dev);
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_get_edid_early(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_config_init(struct drm_device *dev);

To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/