[media] coda: add coda_video_device descriptors

Each video device descriptor determines the name, callback ops, and input and
output formats on the corresponding video device. This simplifies coda_enum_fmt
and coda_try_fmt a bit and will simplify adding separate video devices for JPEG
codecs due to the slightly different behavior in the CodaDx6/CODA7542 case and
a separate hardware unit on CODA960.
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Kamil Debski <k.debski@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

drivers/media/platform/coda/coda.h

@@ -45,11 +45,15 @@ enum coda_product {
 	CODA_960 = 0xf020,
 };
 
+struct coda_video_device;
+
 struct coda_devtype {
 	char			*firmware;
 	enum coda_product	product;
 	const struct coda_codec	*codecs;
 	unsigned int		num_codecs;
+	const struct coda_video_device **vdevs;
+	unsigned int		num_vdevs;
 	size_t			workbuf_size;
 	size_t			tempbuf_size;
 	size_t			iram_size;
@@ -65,7 +69,7 @@ struct coda_aux_buf {
 
 struct coda_dev {
 	struct v4l2_device	v4l2_dev;
-	struct video_device	vfd[2];
+	struct video_device	vfd[3];
 	struct platform_device	*plat_dev;
 	const struct coda_devtype *devtype;
 
@@ -183,6 +187,7 @@ struct coda_ctx {
 	struct work_struct		pic_run_work;
 	struct work_struct		seq_end_work;
 	struct completion		completion;
+	const struct coda_video_device	*cvd;
 	const struct coda_context_ops	*ops;
 	int				aborting;
 	int				initialized;