From: Jesse Barnes <jbarnes@virtuousgeek.org>
Date: Thu, 2 Apr 2009 21:56:24 +0000 (-0700)
Subject: drm: fix EDID backward compat check
X-Git-Tag: v2.6.30-rc1~245^2~3
X-Git-Url: https://bbs.cooldavid.org/git/?a=commitdiff_plain;h=b94ee6528954b6838e88aa8cf74ed75acf8dfcff;p=net-next-2.6.git

drm: fix EDID backward compat check

EDIDs should be backward compatible, so don't bail if we see a version
of 3 (which is out there now) and print a message if we see something
newer, but allow it to be parsed.

Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Dave Airlie <airlied@redhat.com>
---

diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
index 2c4a340e682..ca9c6165671 100644
--- a/drivers/gpu/drm/drm_edid.c
+++ b/drivers/gpu/drm/drm_edid.c
@@ -125,10 +125,8 @@ static bool edid_is_valid(struct edid *edid)
 		DRM_ERROR("EDID has major version %d, instead of 1\n", edid->version);
 		goto bad;
 	}
-	if (edid->revision > 3) {
-		DRM_ERROR("EDID has minor version %d, which is not between 0-3\n", edid->revision);
-		goto bad;
-	}
+	if (edid->revision > 4)
+		DRM_DEBUG("EDID minor > 4, assuming backward compatibility\n");
 
 	for (i = 0; i < EDID_LENGTH; i++)
 		csum += raw_edid[i];