[media] saa7115: allow input standard autodetection for more chips

Autodetect input's standard using field frequency detection
feature (FIDT in status byte at 0x1F) of the chips saa7111/
saa7111a/saa7113/saa7114/saa7118.
Signed-off-by: Anatolij Gustschin <agust@denx.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/video/saa7115.c

@@ -1348,8 +1348,17 @@ static int saa711x_querystd(struct v4l2_subdev *sd, v4l2_std_id *std)
 	int reg1e;
 
 	*std = V4L2_STD_ALL;
-	if (state->ident != V4L2_IDENT_SAA7115)
+	if (state->ident != V4L2_IDENT_SAA7115) {
+		int reg1f = saa711x_read(sd, R_1F_STATUS_BYTE_2_VD_DEC);
+
+		if (reg1f & 0x20)
+			*std = V4L2_STD_525_60;
+		else
+			*std = V4L2_STD_625_50;
+
 		return 0;
+	}
+
 	reg1e = saa711x_read(sd, R_1E_STATUS_BYTE_1_VD_DEC);
 
 	switch (reg1e & 0x03) {