--- zzzz-none-000/linux-3.10.107/drivers/media/usb/gspca/sn9c2028.h	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/drivers/media/usb/gspca/sn9c2028.h	2021-02-04 17:41:59.000000000 +0000
@@ -21,8 +21,15 @@
  *
  */
 
-static const unsigned char sn9c2028_sof_marker[5] =
-	{ 0xff, 0xff, 0x00, 0xc4, 0xc4 };
+static const unsigned char sn9c2028_sof_marker[] = {
+	0xff, 0xff, 0x00, 0xc4, 0xc4, 0x96,
+	0x00,
+	0x00, /* seq */
+	0x00,
+	0x00,
+	0x00, /* avg luminance lower 8 bit */
+	0x00, /* avg luminance higher 8 bit */
+};
 
 static unsigned char *sn9c2028_find_sof(struct gspca_dev *gspca_dev,
 					unsigned char *m, int len)
@@ -32,8 +39,13 @@
 
 	/* Search for the SOF marker (fixed part) in the header */
 	for (i = 0; i < len; i++) {
-		if (m[i] == sn9c2028_sof_marker[sd->sof_read]) {
+		if ((m[i] == sn9c2028_sof_marker[sd->sof_read]) ||
+		    (sd->sof_read > 5)) {
 			sd->sof_read++;
+			if (sd->sof_read == 11)
+				sd->avg_lum_l = m[i];
+			if (sd->sof_read == 12)
+				sd->avg_lum = (m[i] << 8) + sd->avg_lum_l;
 			if (sd->sof_read == sizeof(sn9c2028_sof_marker)) {
 				PDEBUG(D_FRAM,
 					"SOF found, bytes to analyze: %u."