---

yaml --- r: 174492 b: refs/heads/master c: 862b89c h: refs/heads/master v: v3
git-mirror · Nov 24, 2009 · b7369a6 · b7369a6
1 parent 267fab6
commit b7369a6
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Showing 2 changed files with 17 additions and 7 deletions.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 47ee4ccf745ea88ee1aadcf5895d91af3b73ea64
+refs/heads/master: 862b89c069cafded4e31029be511f2e0b58d9c5f
diff --git a/trunk/drivers/gpu/drm/drm_edid.c b/trunk/drivers/gpu/drm/drm_edid.c
@@ -123,23 +123,33 @@ static const u8 edid_header[] = {
  */
 static bool edid_is_valid(struct edid *edid)
 {
-	int i;
+	int i, score = 0;
 	u8 csum = 0;
 	u8 *raw_edid = (u8 *)edid;
 
-	if (memcmp(edid->header, edid_header, sizeof(edid_header)))
-		goto bad;
-	if (edid->version != 1) {
-		DRM_ERROR("EDID has major version %d, instead of 1\n", edid->version);
+	for (i = 0; i < sizeof(edid_header); i++)
+		if (raw_edid[i] == edid_header[i])
+			score++;
+
+	if (score == 8) ;
+	else if (score >= 6) {
+		DRM_DEBUG("Fixing EDID header, your hardware may be failing\n");
+		memcpy(raw_edid, edid_header, sizeof(edid_header));
+	} else
 		goto bad;
-	}
+
 	for (i = 0; i < EDID_LENGTH; i++)
 		csum += raw_edid[i];
 	if (csum) {
 		DRM_ERROR("EDID checksum is invalid, remainder is %d\n", csum);
 		goto bad;
 	}
 
+	if (edid->version != 1) {
+		DRM_ERROR("EDID has major version %d, instead of 1\n", edid->version);
+		goto bad;
+	}
+
 	if (edid->revision > 4)
 		DRM_DEBUG("EDID minor > 4, assuming backward compatibility\n");