diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
index 53bc7a6..69a5a09 100644
--- a/drivers/gpu/drm/drm_edid.c
+++ b/drivers/gpu/drm/drm_edid.c
@@ -1041,13 +1041,15 @@ static bool drm_edid_is_zero(const u8 *in_edid, int length)
  * @raw_edid: pointer to raw EDID block
  * @block: type of block to validate (0 for base, extension otherwise)
  * @print_bad_edid: if true, dump bad EDID blocks to the console
+ * @edid_corrupt: if true, the header or checksum is invalid
  *
  * Validate a base or extension EDID block and optionally dump bad blocks to
  * the console.
  *
  * Return: True if the block is valid, false otherwise.
  */
-bool drm_edid_block_valid(u8 *raw_edid, int block, bool print_bad_edid)
+bool drm_edid_block_valid(u8 *raw_edid, int block, bool print_bad_edid,
+			  bool *edid_corrupt)
 {
 	u8 csum;
 	struct edid *edid = (struct edid *)raw_edid;
@@ -1060,11 +1062,23 @@ bool drm_edid_block_valid(u8 *raw_edid, int block, bool print_bad_edid)
 
 	if (block == 0) {
 		int score = drm_edid_header_is_valid(raw_edid);
-		if (score == 8) ;
-		else if (score >= edid_fixup) {
+		if (score == 8) {
+			if (edid_corrupt)
+				*edid_corrupt = 0;
+		} else if (score >= edid_fixup) {
+			/* Displayport Link CTS Core 1.2 rev1.1 test 4.2.2.6
+			 * The corrupt flag needs to be set here otherwise, the 
+			 * fix-up code here will correct the problem, the 
+			 * checksum is correct and the test fails
+			 */
+			if (edid_corrupt)
+				*edid_corrupt = 1;
 			DRM_DEBUG("Fixing EDID header, your hardware may be failing\n");
 			memcpy(raw_edid, edid_header, sizeof(edid_header));
 		} else {
+			if (edid_corrupt) {
+				*edid_corrupt = 1;
+			}
 			goto bad;
 		}
 	}
@@ -1129,7 +1143,7 @@ bool drm_edid_is_valid(struct edid *edid)
 		return false;
 
 	for (i = 0; i <= edid->extensions; i++)
-		if (!drm_edid_block_valid(raw + i * EDID_LENGTH, i, true))
+		if (!drm_edid_block_valid(raw + i * EDID_LENGTH, i, true, NULL))
 			return false;
 
 	return true;
@@ -1232,7 +1246,8 @@ struct edid *drm_do_get_edid(struct drm_connector *connector,
 	for (i = 0; i < 4; i++) {
 		if (get_edid_block(data, block, 0, EDID_LENGTH))
 			goto out;
-		if (drm_edid_block_valid(block, 0, print_bad_edid))
+		if (drm_edid_block_valid(block, 0, print_bad_edid,
+					 &connector->edid_corrupt))
 			break;
 		if (i == 0 && drm_edid_is_zero(block, EDID_LENGTH)) {
 			connector->null_edid_counter++;
@@ -1257,7 +1272,10 @@ struct edid *drm_do_get_edid(struct drm_connector *connector,
 				  block + (valid_extensions + 1) * EDID_LENGTH,
 				  j, EDID_LENGTH))
 				goto out;
-			if (drm_edid_block_valid(block + (valid_extensions + 1) * EDID_LENGTH, j, print_bad_edid)) {
+			if (drm_edid_block_valid(block + (valid_extensions + 1)
+						 * EDID_LENGTH, j,
+						 print_bad_edid,
+						 NULL)) {
 				valid_extensions++;
 				break;
 			}
diff --git a/drivers/gpu/drm/drm_edid_load.c b/drivers/gpu/drm/drm_edid_load.c
index 4c0aa97..c5605fe 100644
--- a/drivers/gpu/drm/drm_edid_load.c
+++ b/drivers/gpu/drm/drm_edid_load.c
@@ -216,7 +216,8 @@ static void *edid_load(struct drm_connector *connector, const char *name,
 		goto out;
 	}
 
-	if (!drm_edid_block_valid(edid, 0, print_bad_edid)) {
+	if (!drm_edid_block_valid(edid, 0, print_bad_edid,
+				  &connector->edid_corrupt)) {
 		connector->bad_edid_counter++;
 		DRM_ERROR("Base block of EDID firmware \"%s\" is invalid ",
 		    name);
@@ -229,7 +230,9 @@ static void *edid_load(struct drm_connector *connector, const char *name,
 		if (i != valid_extensions + 1)
 			memcpy(edid + (valid_extensions + 1) * EDID_LENGTH,
 			    edid + i * EDID_LENGTH, EDID_LENGTH);
-		if (drm_edid_block_valid(edid + i * EDID_LENGTH, i, print_bad_edid))
+		if (drm_edid_block_valid(edid + i * EDID_LENGTH, i,
+					 print_bad_edid,
+					 NULL))
 			valid_extensions++;
 	}
 
diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h
index d4e4b82..8bc2724 100644
--- a/include/drm/drm_crtc.h
+++ b/include/drm/drm_crtc.h
@@ -719,6 +719,11 @@ struct drm_connector {
 	int null_edid_counter; /* needed to workaround some HW bugs where we get all 0s */
 	unsigned bad_edid_counter;
 
+	/* Flag for raw EDID header corruption - used in Displayport
+	 * compliance testing - * Displayport Link CTS Core 1.2 rev1.1 4.2.2.6
+	 */
+	bool edid_corrupt;
+
 	struct dentry *debugfs_entry;
 
 	struct drm_connector_state *state;
@@ -1443,7 +1448,8 @@ extern void drm_set_preferred_mode(struct drm_connector *connector,
 				   int hpref, int vpref);
 
 extern int drm_edid_header_is_valid(const u8 *raw_edid);
-extern bool drm_edid_block_valid(u8 *raw_edid, int block, bool print_bad_edid);
+extern bool drm_edid_block_valid(u8 *raw_edid, int block, bool print_bad_edid,
+				 bool *edid_corrupt);
 extern bool drm_edid_is_valid(struct edid *edid);
 
 extern struct drm_tile_group *drm_mode_create_tile_group(struct drm_device *dev,
