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authorLaurent Pinchart <laurent.pinchart@ideasonboard.com>2023-09-26 16:43:32 +0300
committerLaurent Pinchart <laurent.pinchart@ideasonboard.com>2024-01-17 19:36:59 +0200
commit0d99f2de13faccf199e6c9e806702cb21d0b6c24 (patch)
treefa0aa5257a2542de2e56708d45d110f5656bb9f3 /src
parentdf770d4b0a6dc11569beb225b7f47aaaa3863269 (diff)
libcamera: v4l2_subdevice: Enable streams API when supported
The streams API needs to be enabled explictly by setting a subdev client capability. Do so unconditionally for subdevs that expose streams support. We don't need any kernel version check to use the VIDIOC_SUBDEV_S_CLIENT_CAP ioctl, as it is guaranteed to be supported by kernels that support streams. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Tested-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Diffstat (limited to 'src')
-rw-r--r--src/libcamera/v4l2_subdevice.cpp15
1 files changed, 15 insertions, 0 deletions
diff --git a/src/libcamera/v4l2_subdevice.cpp b/src/libcamera/v4l2_subdevice.cpp
index 15e8206a..75ad11e5 100644
--- a/src/libcamera/v4l2_subdevice.cpp
+++ b/src/libcamera/v4l2_subdevice.cpp
@@ -359,6 +359,21 @@ int V4L2Subdevice::open()
return ret;
}
+ /* If the subdev supports streams, enable the streams API. */
+ if (caps_.hasStreams()) {
+ struct v4l2_subdev_client_capability clientCaps{};
+ clientCaps.capabilities = V4L2_SUBDEV_CLIENT_CAP_STREAMS;
+
+ ret = ioctl(VIDIOC_SUBDEV_S_CLIENT_CAP, &clientCaps);
+ if (ret < 0) {
+ ret = -errno;
+ LOG(V4L2, Error)
+ << "Unable to set client capabilities: "
+ << strerror(-ret);
+ return ret;
+ }
+ }
+
return 0;
}