media: rcar-vin: Make use of V4L2_CAP_IO_MC

Set the V4L2_CAP_IO_MC capability flag and remove the driver specific
vidioc_enum_input, vidioc_g_input and vidioc_s_input callbacks for the
media controller enabled part of the driver. Also add support mbus_code
filtering for format enumeration.

Signed-off-by: Niklas Söderlund <[e-mail]>
Reviewed-by: Laurent Pinchart <[e-mail]>
Signed-off-by: Hans Verkuil <[e-mail]>
Signed-off-by: Mauro Carvalho Chehab <[e-mail]>

drivers/media/platform/rcar-vin/rcar-v4l2.c

···
 	unsigned int i;
 	int matched;
 
+	/*
+	 * If mbus_code is set only enumerate supported pixel formats for that
+	 * bus code. Converting from YCbCr to RGB and RGB to YCbCr is possible
+	 * with VIN, so all supported YCbCr and RGB media bus codes can produce
+	 * all of the related pixel formats. If mbus_code is not set enumerate
+	 * all possible pixelformats.
+	 *
+	 * TODO: Once raw capture formats are added to the driver this needs
+	 * to be extended so raw media bus codes only result in raw pixel
+	 * formats.
+	 */
+	switch (f->mbus_code) {
+	case 0:
+	case MEDIA_BUS_FMT_YUYV8_1X16:
+	case MEDIA_BUS_FMT_UYVY8_1X16:
+	case MEDIA_BUS_FMT_UYVY8_2X8:
+	case MEDIA_BUS_FMT_UYVY10_2X10:
+	case MEDIA_BUS_FMT_RGB888_1X24:
+		break;
+	default:
+		return -EINVAL;
+	}
+
 	matched = -1;
 	for (i = 0; i < ARRAY_SIZE(rvin_formats); i++) {
 		if (rvin_format_from_pixel(vin, rvin_formats[i].fourcc))
···
 	return 0;
 }
 
-static int rvin_mc_enum_input(struct file *file, void *priv,
-			      struct v4l2_input *i)
-{
-	if (i->index != 0)
-		return -EINVAL;
-
-	i->type = V4L2_INPUT_TYPE_CAMERA;
-	strscpy(i->name, "Camera", sizeof(i->name));
-
-	return 0;
-}
-
 static const struct v4l2_ioctl_ops rvin_mc_ioctl_ops = {
 	.vidioc_querycap		= rvin_querycap,
 	.vidioc_try_fmt_vid_cap		= rvin_mc_try_fmt_vid_cap,
 	.vidioc_g_fmt_vid_cap		= rvin_g_fmt_vid_cap,
 	.vidioc_s_fmt_vid_cap		= rvin_mc_s_fmt_vid_cap,
 	.vidioc_enum_fmt_vid_cap	= rvin_enum_fmt_vid_cap,
-
-	.vidioc_enum_input		= rvin_mc_enum_input,
-	.vidioc_g_input			= rvin_g_input,
-	.vidioc_s_input			= rvin_s_input,
 
 	.vidioc_reqbufs			= vb2_ioctl_reqbufs,
 	.vidioc_create_bufs		= vb2_ioctl_create_bufs,
···
 	vin->format.colorspace = RVIN_DEFAULT_COLORSPACE;
 
 	if (vin->info->use_mc) {
+		vdev->device_caps |= V4L2_CAP_IO_MC;
 		vdev->ioctl_ops = &rvin_mc_ioctl_ops;
 	} else {
 		vdev->ioctl_ops = &rvin_ioctl_ops;