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Subject: media: v4l: subdev: Add trivial set_routing support
Author: Sakari Ailus <sakari.ai...@linux.intel.com>
Date: Thu Aug 31 15:40:07 2023 +0300
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.ai...@linux.intel.com>
Co-developed-by: Laurent Pinchart <laurent.pinch...@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinch...@ideasonboard.com>
Reviewed-by: Julien Massot <julien.mas...@collabora.com>
Signed-off-by: Hans Verkuil <hverkuil-ci...@xs4all.nl>
drivers/media/v4l2-core/v4l2-subdev.c | 14 ++++++++++++++
1 file changed, 14 insertions(+)
---
diff --git a/drivers/media/v4l2-core/v4l2-subdev.c
b/drivers/media/v4l2-core/v4l2-subdev.c
index 3d1ed8ab5229..8470d6eda9a3 100644
--- a/drivers/media/v4l2-core/v4l2-subdev.c
+++ b/drivers/media/v4l2-core/v4l2-subdev.c
@@ -1013,6 +1013,20 @@ static long subdev_do_ioctl(struct file *file, unsigned
int cmd, void *arg,
return -EINVAL;
}
+ /*
+ * If the driver doesn't support setting routing, just return
+ * the routing table.
+ */
+ if (!v4l2_subdev_has_op(sd, pad, set_routing)) {
+ memcpy((struct v4l2_subdev_route
*)(uintptr_t)routing->routes,
+ state->routing.routes,
+ min(state->routing.num_routes,
routing->len_routes) *
+ sizeof(*state->routing.routes));
+ routing->num_routes = state->routing.num_routes;
+
+ return 0;
+ }
+
krouting.num_routes = routing->num_routes;
krouting.len_routes = routing->len_routes;
krouting.routes = routes;
