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

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Date:	Fri, 14 Aug 2015 16:49:58 +0100
From:	Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
To:	Thierry Reding <thierry.reding@...il.com>,
	dri-devel@...ts.freedesktop.org
Cc:	David Airlie <airlied@...ux.ie>, linux-kernel@...r.kernel.org,
	linux-arm-msm@...r.kernel.org, robdclark@...il.com, bjorn@...o.se,
	Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
Subject: [PATCH RFC 1/5] drm/edid: Add support to get edid early

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@...aro.org>
---
 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,
 }
 EXPORT_SYMBOL(drm_get_edid);
 
+struct edid *drm_get_edid_early(struct i2c_adapter *adapter)
+{
+	struct drm_connector dummy_connector;
+
+	return drm_get_edid(&dummy_connector, adapter);
+}
+EXPORT_SYMBOL(drm_get_edid_early);
+
 /**
  * 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);
-- 
1.9.1

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