[PATCH v6 19/28] media: v4l: subdev: Add trivial set_routing support

[Sakari Ailus <sakari.ailus@linux.intel.com>]

Add trivial S_ROUTING IOCTL support for drivers where routing is static.
Essentially this means returning the same information G_ROUTING call would
have done.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
---
 drivers/media/v4l2-core/v4l2-subdev.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/media/v4l2-core/v4l2-subdev.c b/drivers/media/v4l2-core/v4l2-subdev.c
index dd48e7e549fb..7d7028de581a 100644
--- a/drivers/media/v4l2-core/v4l2-subdev.c
+++ b/drivers/media/v4l2-core/v4l2-subdev.c
@@ -894,6 +894,9 @@ static long subdev_do_ioctl(struct file *file, unsigned int cmd, void *arg,
 		struct v4l2_subdev_krouting krouting = {};
 		unsigned int i;
 
+		if (!v4l2_subdev_has_op(sd, pad, set_routing))
+			goto do_vidioc_subdev_g_routing;
+
 		if (!v4l2_subdev_enable_streams_api)
 			return -ENOIOCTLCMD;
 
@@ -939,6 +942,8 @@ static long subdev_do_ioctl(struct file *file, unsigned int cmd, void *arg,
 					routing->which, &krouting);
 		if (rval < 0)
 			return rval;
+do_vidioc_subdev_g_routing:
+		;
 	}
 		fallthrough;
 
-- 
2.39.2