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[v7,17/31] media: v4l: subdev: Add trivial set_routing support

Message ID 20231106122539.1268265-18-sakari.ailus@linux.intel.com
State New
Headers show
Series Generic line based metadata support, internal pads | expand

Commit Message

Sakari Ailus Nov. 6, 2023, 12:25 p.m. UTC 
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 | 14 ++++++++++++++
 1 file changed, 14 insertions(+)
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Patch

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;