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@xxxxxxxxxxxxxxx>
---
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 5e527938a3cc..c32d62414bab 100644
--- a/drivers/media/v4l2-core/v4l2-subdev.c
+++ b/drivers/media/v4l2-core/v4l2-subdev.c
@@ -908,6 +908,20 @@ static long subdev_do_ioctl(struct file *file, unsigned int cmd, void *arg,
memset(routing->reserved, 0, sizeof(routing->reserved));
+ /*
+ * If the driver doesn't support setting routing, just return
+ * the routing table here.
+ */
+ 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;
+ }
+
for (i = 0; i < routing->num_routes; ++i) {
const struct v4l2_subdev_route *route = &routes[i];
const struct media_pad *pads = sd->entity.pads;
--
2.39.2
