media: usbtv: Add PAL-Nc standard

Add PAL-Nc support to usbtv, the corresponding register value "0x00fe"
comes from the Windows driver "Active Development Co., Ltd. v2.1.1.2".
Signed-off-by: Jorge Maidana <jorgem.linux@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>

drivers/media/usb/usbtv/usbtv-video.c

@@ -136,6 +136,8 @@ static uint16_t usbtv_norm_to_16f_reg(v4l2_std_id norm)
 		return 0x00a8;
 	if (norm & (V4L2_STD_PAL_M | V4L2_STD_PAL_60))
 		return 0x00bc;
+	if (norm & V4L2_STD_PAL_Nc)
+		return 0x00fe;
 	/* Fallback to automatic detection for other standards */
 	return 0x0000;
 }
@@ -241,7 +243,8 @@ static int usbtv_select_norm(struct usbtv *usbtv, v4l2_std_id norm)
 		static const v4l2_std_id ntsc_mask =
 			V4L2_STD_NTSC | V4L2_STD_NTSC_443;
 		static const v4l2_std_id pal_mask =
-			V4L2_STD_PAL | V4L2_STD_PAL_60 | V4L2_STD_PAL_M;
+			V4L2_STD_PAL | V4L2_STD_PAL_60 | V4L2_STD_PAL_M |
+			V4L2_STD_PAL_Nc;
 
 		if (norm & ntsc_mask)
 			ret = usbtv_set_regs(usbtv, ntsc, ARRAY_SIZE(ntsc));

drivers/media/usb/usbtv/usbtv.h

@@ -68,7 +68,8 @@
 #define USBTV_ODD(chunk)	((be32_to_cpu(chunk[0]) & 0x0000f000) >> 15)
 #define USBTV_CHUNK_NO(chunk)	(be32_to_cpu(chunk[0]) & 0x00000fff)
 
-#define USBTV_TV_STD  (V4L2_STD_525_60 | V4L2_STD_PAL | V4L2_STD_SECAM)
+#define USBTV_TV_STD		(V4L2_STD_525_60 | V4L2_STD_PAL | \
+				 V4L2_STD_PAL_Nc | V4L2_STD_SECAM)
 
 /* parameters for supported TV norms */
 struct usbtv_norm_params {