Hi Brian,
On Thu, Jul 23, 2026 at 8:32 PM Brian Daniels <[email protected]> wrote:
>
> From: Alexandre Courbot <[email protected]>
>
> Add the first version of the virtio-media driver.
>
> This driver acts roughly as a V4L2 relay between user-space and the
> virtio virtual device on the host, so it is relatively simple, yet
> unconventional. It doesn't use VB2 or other frameworks typically used in
> a V4L2 driver, and most of its complexity resides in correctly and
> efficiently building the virtio descriptor chain to pass to the host,
> avoiding copies whenever possible. This is done by
> scatterlist_builder.[ch].
>
> This version supports MMAP buffers, while USERPTR buffers can also be
> enabled through a driver option. DMABUF support is still pending.
>
> NOTE: This depends on the VIRTIO ID being added in this patch:
> https://lore.kernel.org/all/[email protected]
Tested on top of [1], with the rust-vmm backend [2], and QEMU patch
adding the pci device [3].
In the guest I have enabled allow_userptr parameter and tested video
capture both with mmap and userptr memory types. Both worked perfectly
fine.
I also tested v4l2-compliance, with results similar to those pasted
below. The summary shows:
Total for virtio-media device /dev/video0: 56, Succeeded: 54,
Failed: 2, Warnings: 0
The additional failed test with respect to the results shown in the
cover seems to be `VIDIOC_G/S/TRY_EXT_CTRLS`, where s_ctrl returned
error 13. Nevertheless, the results are in line with my expectations,
specially with the camera capture tests, so:
Tested-by: Albert Esteve <[email protected]>
[1]
https://lore.kernel.org/all/[email protected]
[2] https://github.com/rust-vmm/vhost-device/tree/main/vhost-device-media
[3] https://lore.kernel.org/all/[email protected]/
BR,
Albert.
>
> Signed-off-by: Alexandre Courbot <[email protected]>
> Co-developed-by: Brian Daniels <[email protected]>
> Signed-off-by: Brian Daniels <[email protected]>
> ---
> Guest Setup
>
> Tests were ran on a Debian 12 guest running with crosvm. The guest image
> was created with:
>
> $ virt-builder debian-12 --root-password password:""
>
> Build crosvm and launch the guest starting at the "Crosvm" section on
> this page:
> https://github.com/chromeos/virtio-media/blob/main/TRY_IT_OUT.md#crosvm
>
> NOTE: Before running v4l2-compliance in the guest, you need to install
> v4l-utils and ffmpeg:
>
> $ apt update && apt install v4l-utils ffmpeg
>
> ---
> Compliance Testing
>
> This was tested using v4l2-compliance. Since virtio-media serves as
> a proxy to host devices for the guest VMs, we expect the guest
> compliance test to essentially match the host compliance test for the
> same device.
>
> NOTE: v4l2-compliance changes its test behavior depending on the driver
> name. In the guest, the driver name for virtio-media proxied-devices is
> always "virtio-media", even if the actual host device has a driver name
> of e.g. "uvcvideo". To ensure the test is consistent between the host
> and the guest, I created a patch for the v4l2-compliance tool that
> allows you to override the driver name. All test results that follow use
> this patch:
> https://lore.kernel.org/r/[email protected]/
>
> All tests used a Logitech USB Webcam C925e.
>
> As tested on the host:
>
> $ v4l2-compliance -d1 -s
>
> v4l2-compliance 1.33.0-5471, 64 bits, 64-bit time_t
> v4l2-compliance SHA: 9f2d3ea879ff 2026-05-28 14:45:11
>
> Compliance test for uvcvideo device /dev/video1:
>
> Driver Info:
> Driver name : uvcvideo
> Card type : Logitech Webcam C925e
> Bus info : usb-0000:04:00.1-3
> Driver version : 6.18.14
> Capabilities : 0x84a00001
> Video Capture
> Metadata Capture
> Streaming
> Extended Pix Format
> Device Capabilities
> Device Caps : 0x04200001
> Video Capture
> Streaming
> Extended Pix Format
> Media Driver Info:
> Driver name : uvcvideo
> Model : Logitech Webcam C925e
> Serial : 686F371F
> Bus info : usb-0000:04:00.1-3
> Media version : 6.18.14
> Hardware revision: 0x00000016 (22)
> Driver version : 6.18.14
> Interface Info:
> ID : 0x03000002
> Type : V4L Video
> Entity Info:
> ID : 0x00000001 (1)
> Name : Logitech Webcam C925e
> Function : V4L2 I/O
> Flags : default
> Pad 0x01000007 : 0: Sink
> Link 0x0200001f: from remote pad 0x100000a of entity 'Processing 3'
> (Video Pixel Formatter): Data, Enabled, Immutable
>
> Required ioctls:
> test MC information (see 'Media Driver Info' above): OK
> test VIDIOC_QUERYCAP: OK
> test invalid ioctls: OK
>
> Allow for multiple opens:
> test second /dev/video1 open: OK
> test VIDIOC_QUERYCAP: OK
> test VIDIOC_G/S_PRIORITY: OK
> test for unlimited opens: OK
>
> Debug ioctls:
> test VIDIOC_DBG_G/S_REGISTER: OK (Not Supported)
> test VIDIOC_LOG_STATUS: OK (Not Supported)
>
> Input ioctls:
> test VIDIOC_G/S_TUNER/ENUM_FREQ_BANDS: OK (Not Supported)
> test VIDIOC_G/S_FREQUENCY: OK (Not Supported)
> test VIDIOC_S_HW_FREQ_SEEK: OK (Not Supported)
> test VIDIOC_ENUMAUDIO: OK (Not Supported)
> test VIDIOC_G/S/ENUMINPUT: OK
> test VIDIOC_G/S_AUDIO: OK (Not Supported)
> Inputs: 1 Audio Inputs: 0 Tuners: 0
>
> Output ioctls:
> test VIDIOC_G/S_MODULATOR: OK (Not Supported)
> test VIDIOC_G/S_FREQUENCY: OK (Not Supported)
> test VIDIOC_ENUMAUDOUT: OK (Not Supported)
> test VIDIOC_G/S/ENUMOUTPUT: OK (Not Supported)
> test VIDIOC_G/S_AUDOUT: OK (Not Supported)
> Outputs: 0 Audio Outputs: 0 Modulators: 0
>
> Input/Output configuration ioctls:
> test VIDIOC_ENUM/G/S/QUERY_STD: OK (Not Supported)
> test VIDIOC_ENUM/G/S/QUERY_DV_TIMINGS: OK (Not Supported)
> test VIDIOC_DV_TIMINGS_CAP: OK (Not Supported)
> test VIDIOC_G/S_EDID: OK (Not Supported)
>
> Control ioctls (Input 0):
> test VIDIOC_QUERY_EXT_CTRL/QUERYMENU: OK
> test VIDIOC_QUERYCTRL: OK
> test VIDIOC_G/S_CTRL: OK
> fail: v4l2-test-controls.cpp(983): ret != EINVAL (got 13)
> test VIDIOC_G/S/TRY_EXT_CTRLS: FAIL
> test VIDIOC_(UN)SUBSCRIBE_EVENT/DQEVENT: OK
> test VIDIOC_G/S_JPEGCOMP: OK (Not Supported)
> Standard Controls: 19 Private Controls: 0
>
> Format ioctls (Input 0):
> test VIDIOC_ENUM_FMT/FRAMESIZES/FRAMEINTERVALS: OK
> test VIDIOC_G/S_PARM: OK
> test VIDIOC_G_FBUF: OK (Not Supported)
> test VIDIOC_G_FMT: OK
> test VIDIOC_TRY_FMT: OK
> test VIDIOC_S_FMT: OK
> test VIDIOC_G_SLICED_VBI_CAP: OK (Not Supported)
> test Cropping: OK (Not Supported)
> test Composing: OK (Not Supported)
> test Scaling: OK (Not Supported)
>
> Codec ioctls (Input 0):
> test VIDIOC_(TRY_)ENCODER_CMD: OK (Not Supported)
> test VIDIOC_G_ENC_INDEX: OK (Not Supported)
> test VIDIOC_(TRY_)DECODER_CMD: OK (Not Supported)
>
> Buffer ioctls (Input 0):
> test VIDIOC_REQBUFS/CREATE_BUFS/QUERYBUF: OK
> test CREATE_BUFS maximum buffers: OK
> test VIDIOC_REMOVE_BUFS: OK
> test VIDIOC_EXPBUF: OK
> test Requests: OK (Not Supported)
> test blocking wait: OK
>
> Test input 0:
>
> Streaming ioctls:
> test read/write: OK (Not Supported)
>
> Video Capture: Frame #000
> Video Capture: Frame #001
> Video Capture: Frame #002
> Video Capture: Frame #003
> Video Capture: Frame #004
> Video Capture: Frame #005
> Video Capture: Frame #006
> Video Capture: Frame #007
> Video Capture: Frame #008
> Video Capture: Frame #009
> Video Capture: Frame #010
> Video Capture: Frame #011
> Video Capture: Frame #012
> Video Capture: Frame #013
> Video Capture: Frame #014
> Video Capture: Frame #015
> Video Capture: Frame #016
> Video Capture: Frame #017
> Video Capture: Frame #018
> Video Capture: Frame #019
> Video Capture: Frame #020
> Video Capture: Frame #021
> Video Capture: Frame #022
> Video Capture: Frame #023
> Video Capture: Frame #024
> Video Capture: Frame #025
> Video Capture: Frame #026
> Video Capture: Frame #027
> Video Capture: Frame #028
> Video Capture: Frame #029
> Video Capture: Frame #030
> Video Capture: Frame #031
> Video Capture: Frame #032
> Video Capture: Frame #033
> Video Capture: Frame #034
> Video Capture: Frame #035
> Video Capture: Frame #036
> Video Capture: Frame #037
> Video Capture: Frame #038
> Video Capture: Frame #039
> Video Capture: Frame #040
> Video Capture: Frame #041
> Video Capture: Frame #042
> Video Capture: Frame #043
> Video Capture: Frame #044
> Video Capture: Frame #045
> Video Capture: Frame #046
> Video Capture: Frame #047
> Video Capture: Frame #048
> Video Capture: Frame #049
> Video Capture: Frame #050
> Video Capture: Frame #051
> Video Capture: Frame #052
> Video Capture: Frame #053
> Video Capture: Frame #054
> Video Capture: Frame #055
> Video Capture: Frame #056
> Video Capture: Frame #057
> Video Capture: Frame #058
> Video Capture: Frame #059
>
> test MMAP (no poll, REQBUFS): OK
>
> Video Capture: Frame #000 (select)
> Video Capture: Frame #001 (select)
> Video Capture: Frame #002 (select)
> Video Capture: Frame #003 (select)
> Video Capture: Frame #004 (select)
> Video Capture: Frame #005 (select)
> Video Capture: Frame #006 (select)
> Video Capture: Frame #007 (select)
> Video Capture: Frame #008 (select)
> Video Capture: Frame #009 (select)
> Video Capture: Frame #010 (select)
> Video Capture: Frame #011 (select)
> Video Capture: Frame #012 (select)
> Video Capture: Frame #013 (select)
> Video Capture: Frame #014 (select)
> Video Capture: Frame #015 (select)
> Video Capture: Frame #016 (select)
> Video Capture: Frame #017 (select)
> Video Capture: Frame #018 (select)
> Video Capture: Frame #019 (select)
> Video Capture: Frame #020 (select)
> Video Capture: Frame #021 (select)
> Video Capture: Frame #022 (select)
> Video Capture: Frame #023 (select)
> Video Capture: Frame #024 (select)
> Video Capture: Frame #025 (select)
> Video Capture: Frame #026 (select)
> Video Capture: Frame #027 (select)
> Video Capture: Frame #028 (select)
> Video Capture: Frame #029 (select)
> Video Capture: Frame #030 (select)
> Video Capture: Frame #031 (select)
> Video Capture: Frame #032 (select)
> Video Capture: Frame #033 (select)
> Video Capture: Frame #034 (select)
> Video Capture: Frame #035 (select)
> Video Capture: Frame #036 (select)
> Video Capture: Frame #037 (select)
> Video Capture: Frame #038 (select)
> Video Capture: Frame #039 (select)
> Video Capture: Frame #040 (select)
> Video Capture: Frame #041 (select)
> Video Capture: Frame #042 (select)
> Video Capture: Frame #043 (select)
> Video Capture: Frame #044 (select)
> Video Capture: Frame #045 (select)
> Video Capture: Frame #046 (select)
> Video Capture: Frame #047 (select)
> Video Capture: Frame #048 (select)
> Video Capture: Frame #049 (select)
> Video Capture: Frame #050 (select)
> Video Capture: Frame #051 (select)
> Video Capture: Frame #052 (select)
> Video Capture: Frame #053 (select)
> Video Capture: Frame #054 (select)
> Video Capture: Frame #055 (select)
> Video Capture: Frame #056 (select)
> Video Capture: Frame #057 (select)
> Video Capture: Frame #058 (select)
> Video Capture: Frame #059 (select)
>
> test MMAP (select, REQBUFS): OK
>
> Video Capture: Frame #000 (epoll)
> Video Capture: Frame #001 (epoll)
> Video Capture: Frame #002 (epoll)
> Video Capture: Frame #003 (epoll)
> Video Capture: Frame #004 (epoll)
> Video Capture: Frame #005 (epoll)
> Video Capture: Frame #006 (epoll)
> Video Capture: Frame #007 (epoll)
> Video Capture: Frame #008 (epoll)
> Video Capture: Frame #009 (epoll)
> Video Capture: Frame #010 (epoll)
> Video Capture: Frame #011 (epoll)
> Video Capture: Frame #012 (epoll)
> Video Capture: Frame #013 (epoll)
> Video Capture: Frame #014 (epoll)
> Video Capture: Frame #015 (epoll)
> Video Capture: Frame #016 (epoll)
> Video Capture: Frame #017 (epoll)
> Video Capture: Frame #018 (epoll)
> Video Capture: Frame #019 (epoll)
> Video Capture: Frame #020 (epoll)
> Video Capture: Frame #021 (epoll)
> Video Capture: Frame #022 (epoll)
> Video Capture: Frame #023 (epoll)
> Video Capture: Frame #024 (epoll)
> Video Capture: Frame #025 (epoll)
> Video Capture: Frame #026 (epoll)
> Video Capture: Frame #027 (epoll)
> Video Capture: Frame #028 (epoll)
> Video Capture: Frame #029 (epoll)
> Video Capture: Frame #030 (epoll)
> Video Capture: Frame #031 (epoll)
> Video Capture: Frame #032 (epoll)
> Video Capture: Frame #033 (epoll)
> Video Capture: Frame #034 (epoll)
> Video Capture: Frame #035 (epoll)
> Video Capture: Frame #036 (epoll)
> Video Capture: Frame #037 (epoll)
> Video Capture: Frame #038 (epoll)
> Video Capture: Frame #039 (epoll)
> Video Capture: Frame #040 (epoll)
> Video Capture: Frame #041 (epoll)
> Video Capture: Frame #042 (epoll)
> Video Capture: Frame #043 (epoll)
> Video Capture: Frame #044 (epoll)
> Video Capture: Frame #045 (epoll)
> Video Capture: Frame #046 (epoll)
> Video Capture: Frame #047 (epoll)
> Video Capture: Frame #048 (epoll)
> Video Capture: Frame #049 (epoll)
> Video Capture: Frame #050 (epoll)
> Video Capture: Frame #051 (epoll)
> Video Capture: Frame #052 (epoll)
> Video Capture: Frame #053 (epoll)
> Video Capture: Frame #054 (epoll)
> Video Capture: Frame #055 (epoll)
> Video Capture: Frame #056 (epoll)
> Video Capture: Frame #057 (epoll)
> Video Capture: Frame #058 (epoll)
> Video Capture: Frame #059 (epoll)
>
> test MMAP (epoll, REQBUFS): OK
>
> Video Capture: Frame #000
> Video Capture: Frame #001
> Video Capture: Frame #002
> Video Capture: Frame #003
> Video Capture: Frame #004
> Video Capture: Frame #005
> Video Capture: Frame #006
> Video Capture: Frame #007
> Video Capture: Frame #008
> Video Capture: Frame #009
> Video Capture: Frame #010
> Video Capture: Frame #011
> Video Capture: Frame #012
> Video Capture: Frame #013
> Video Capture: Frame #014
> Video Capture: Frame #015
> Video Capture: Frame #016
> Video Capture: Frame #017
> Video Capture: Frame #018
> Video Capture: Frame #019
> Video Capture: Frame #020
> Video Capture: Frame #021
> Video Capture: Frame #022
> Video Capture: Frame #023
> Video Capture: Frame #024
> Video Capture: Frame #025
> Video Capture: Frame #026
> Video Capture: Frame #027
> Video Capture: Frame #028
> Video Capture: Frame #029
> Video Capture: Frame #030
> Video Capture: Frame #031
> Video Capture: Frame #032
> Video Capture: Frame #033
> Video Capture: Frame #034
> Video Capture: Frame #035
> Video Capture: Frame #036
> Video Capture: Frame #037
> Video Capture: Frame #038
> Video Capture: Frame #039
> Video Capture: Frame #040
> Video Capture: Frame #041
> Video Capture: Frame #042
> Video Capture: Frame #043
> Video Capture: Frame #044
> Video Capture: Frame #045
> Video Capture: Frame #046
> Video Capture: Frame #047
> Video Capture: Frame #048
> Video Capture: Frame #049
> Video Capture: Frame #050
> Video Capture: Frame #051
> Video Capture: Frame #052
> Video Capture: Frame #053
> Video Capture: Frame #054
> Video Capture: Frame #055
> Video Capture: Frame #056
> Video Capture: Frame #057
> Video Capture: Frame #058
> Video Capture: Frame #059
>
> test MMAP (no poll, CREATE_BUFS): OK
>
> Video Capture: Frame #000 (select)
> Video Capture: Frame #001 (select)
> Video Capture: Frame #002 (select)
> Video Capture: Frame #003 (select)
> Video Capture: Frame #004 (select)
> Video Capture: Frame #005 (select)
> Video Capture: Frame #006 (select)
> Video Capture: Frame #007 (select)
> Video Capture: Frame #008 (select)
> Video Capture: Frame #009 (select)
> Video Capture: Frame #010 (select)
> Video Capture: Frame #011 (select)
> Video Capture: Frame #012 (select)
> Video Capture: Frame #013 (select)
> Video Capture: Frame #014 (select)
> Video Capture: Frame #015 (select)
> Video Capture: Frame #016 (select)
> Video Capture: Frame #017 (select)
> Video Capture: Frame #018 (select)
> Video Capture: Frame #019 (select)
> Video Capture: Frame #020 (select)
> Video Capture: Frame #021 (select)
> Video Capture: Frame #022 (select)
> Video Capture: Frame #023 (select)
> Video Capture: Frame #024 (select)
> Video Capture: Frame #025 (select)
> Video Capture: Frame #026 (select)
> Video Capture: Frame #027 (select)
> Video Capture: Frame #028 (select)
> Video Capture: Frame #029 (select)
> Video Capture: Frame #030 (select)
> Video Capture: Frame #031 (select)
> Video Capture: Frame #032 (select)
> Video Capture: Frame #033 (select)
> Video Capture: Frame #034 (select)
> Video Capture: Frame #035 (select)
> Video Capture: Frame #036 (select)
> Video Capture: Frame #037 (select)
> Video Capture: Frame #038 (select)
> Video Capture: Frame #039 (select)
> Video Capture: Frame #040 (select)
> Video Capture: Frame #041 (select)
> Video Capture: Frame #042 (select)
> Video Capture: Frame #043 (select)
> Video Capture: Frame #044 (select)
> Video Capture: Frame #045 (select)
> Video Capture: Frame #046 (select)
> Video Capture: Frame #047 (select)
> Video Capture: Frame #048 (select)
> Video Capture: Frame #049 (select)
> Video Capture: Frame #050 (select)
> Video Capture: Frame #051 (select)
> Video Capture: Frame #052 (select)
> Video Capture: Frame #053 (select)
> Video Capture: Frame #054 (select)
> Video Capture: Frame #055 (select)
> Video Capture: Frame #056 (select)
> Video Capture: Frame #057 (select)
> Video Capture: Frame #058 (select)
> Video Capture: Frame #059 (select)
>
> test MMAP (select, CREATE_BUFS): OK
>
> Video Capture: Frame #000 (epoll)
> Video Capture: Frame #001 (epoll)
> Video Capture: Frame #002 (epoll)
> Video Capture: Frame #003 (epoll)
> Video Capture: Frame #004 (epoll)
> Video Capture: Frame #005 (epoll)
> Video Capture: Frame #006 (epoll)
> Video Capture: Frame #007 (epoll)
> Video Capture: Frame #008 (epoll)
> Video Capture: Frame #009 (epoll)
> Video Capture: Frame #010 (epoll)
> Video Capture: Frame #011 (epoll)
> Video Capture: Frame #012 (epoll)
> Video Capture: Frame #013 (epoll)
> Video Capture: Frame #014 (epoll)
> Video Capture: Frame #015 (epoll)
> Video Capture: Frame #016 (epoll)
> Video Capture: Frame #017 (epoll)
> Video Capture: Frame #018 (epoll)
> Video Capture: Frame #019 (epoll)
> Video Capture: Frame #020 (epoll)
> Video Capture: Frame #021 (epoll)
> Video Capture: Frame #022 (epoll)
> Video Capture: Frame #023 (epoll)
> Video Capture: Frame #024 (epoll)
> Video Capture: Frame #025 (epoll)
> Video Capture: Frame #026 (epoll)
> Video Capture: Frame #027 (epoll)
> Video Capture: Frame #028 (epoll)
> Video Capture: Frame #029 (epoll)
> Video Capture: Frame #030 (epoll)
> Video Capture: Frame #031 (epoll)
> Video Capture: Frame #032 (epoll)
> Video Capture: Frame #033 (epoll)
> Video Capture: Frame #034 (epoll)
> Video Capture: Frame #035 (epoll)
> Video Capture: Frame #036 (epoll)
> Video Capture: Frame #037 (epoll)
> Video Capture: Frame #038 (epoll)
> Video Capture: Frame #039 (epoll)
> Video Capture: Frame #040 (epoll)
> Video Capture: Frame #041 (epoll)
> Video Capture: Frame #042 (epoll)
> Video Capture: Frame #043 (epoll)
> Video Capture: Frame #044 (epoll)
> Video Capture: Frame #045 (epoll)
> Video Capture: Frame #046 (epoll)
> Video Capture: Frame #047 (epoll)
> Video Capture: Frame #048 (epoll)
> Video Capture: Frame #049 (epoll)
> Video Capture: Frame #050 (epoll)
> Video Capture: Frame #051 (epoll)
> Video Capture: Frame #052 (epoll)
> Video Capture: Frame #053 (epoll)
> Video Capture: Frame #054 (epoll)
> Video Capture: Frame #055 (epoll)
> Video Capture: Frame #056 (epoll)
> Video Capture: Frame #057 (epoll)
> Video Capture: Frame #058 (epoll)
> Video Capture: Frame #059 (epoll)
>
> test MMAP (epoll, CREATE_BUFS): OK
>
> Video Capture: Frame #000
> Video Capture: Frame #001
> Video Capture: Frame #002
> Video Capture: Frame #003
> Video Capture: Frame #004
> Video Capture: Frame #005
> Video Capture: Frame #006
> Video Capture: Frame #007
> Video Capture: Frame #008
> Video Capture: Frame #009
> Video Capture: Frame #010
> Video Capture: Frame #011
> Video Capture: Frame #012
> Video Capture: Frame #013
> Video Capture: Frame #014
> Video Capture: Frame #015
> Video Capture: Frame #016
> Video Capture: Frame #017
> Video Capture: Frame #018
> Video Capture: Frame #019
> Video Capture: Frame #020
> Video Capture: Frame #021
> Video Capture: Frame #022
> Video Capture: Frame #023
> Video Capture: Frame #024
> Video Capture: Frame #025
> Video Capture: Frame #026
> Video Capture: Frame #027
> Video Capture: Frame #028
> Video Capture: Frame #029
> Video Capture: Frame #030
> Video Capture: Frame #031
> Video Capture: Frame #032
> Video Capture: Frame #033
> Video Capture: Frame #034
> Video Capture: Frame #035
> Video Capture: Frame #036
> Video Capture: Frame #037
> Video Capture: Frame #038
> Video Capture: Frame #039
> Video Capture: Frame #040
> Video Capture: Frame #041
> Video Capture: Frame #042
> Video Capture: Frame #043
> Video Capture: Frame #044
> Video Capture: Frame #045
> Video Capture: Frame #046
> Video Capture: Frame #047
> Video Capture: Frame #048
> Video Capture: Frame #049
> Video Capture: Frame #050
> Video Capture: Frame #051
> Video Capture: Frame #052
> Video Capture: Frame #053
> Video Capture: Frame #054
> Video Capture: Frame #055
> Video Capture: Frame #056
> Video Capture: Frame #057
> Video Capture: Frame #058
> Video Capture: Frame #059
>
> test USERPTR (no poll): OK
>
> Video Capture: Frame #000 (select)
> Video Capture: Frame #001 (select)
> Video Capture: Frame #002 (select)
> Video Capture: Frame #003 (select)
> Video Capture: Frame #004 (select)
> Video Capture: Frame #005 (select)
> Video Capture: Frame #006 (select)
> Video Capture: Frame #007 (select)
> Video Capture: Frame #008 (select)
> Video Capture: Frame #009 (select)
> Video Capture: Frame #010 (select)
> Video Capture: Frame #011 (select)
> Video Capture: Frame #012 (select)
> Video Capture: Frame #013 (select)
> Video Capture: Frame #014 (select)
> Video Capture: Frame #015 (select)
> Video Capture: Frame #016 (select)
> Video Capture: Frame #017 (select)
> Video Capture: Frame #018 (select)
> Video Capture: Frame #019 (select)
> Video Capture: Frame #020 (select)
> Video Capture: Frame #021 (select)
> Video Capture: Frame #022 (select)
> Video Capture: Frame #023 (select)
> Video Capture: Frame #024 (select)
> Video Capture: Frame #025 (select)
> Video Capture: Frame #026 (select)
> Video Capture: Frame #027 (select)
> Video Capture: Frame #028 (select)
> Video Capture: Frame #029 (select)
> Video Capture: Frame #030 (select)
> Video Capture: Frame #031 (select)
> Video Capture: Frame #032 (select)
> Video Capture: Frame #033 (select)
> Video Capture: Frame #034 (select)
> Video Capture: Frame #035 (select)
> Video Capture: Frame #036 (select)
> Video Capture: Frame #037 (select)
> Video Capture: Frame #038 (select)
> Video Capture: Frame #039 (select)
> Video Capture: Frame #040 (select)
> Video Capture: Frame #041 (select)
> Video Capture: Frame #042 (select)
> Video Capture: Frame #043 (select)
> Video Capture: Frame #044 (select)
> Video Capture: Frame #045 (select)
> Video Capture: Frame #046 (select)
> Video Capture: Frame #047 (select)
> Video Capture: Frame #048 (select)
> Video Capture: Frame #049 (select)
> Video Capture: Frame #050 (select)
> Video Capture: Frame #051 (select)
> Video Capture: Frame #052 (select)
> Video Capture: Frame #053 (select)
> Video Capture: Frame #054 (select)
> Video Capture: Frame #055 (select)
> Video Capture: Frame #056 (select)
> Video Capture: Frame #057 (select)
> Video Capture: Frame #058 (select)
> Video Capture: Frame #059 (select)
>
> test USERPTR (select): OK
> test DMABUF: Cannot test, specify --expbuf-device
>
> Total for uvcvideo device /dev/video1: 58, Succeeded: 57, Failed: 1,
> Warnings: 0
>
> As tested on the guest:
>
> $ v4l2-compliance -d0 -s --driver-name uvcvideo
>
> v4l2-compliance 1.33.0-5457, 64 bits, 64-bit time_t
> v4l2-compliance SHA: e7e240f546f3 2026-05-28 17:06:12
>
> Compliance test for uvcvideo device (overridden from virtio-media)
> /dev/video0:
>
> Driver Info:
> Driver name : uvcvideo
> Card type : Logitech Webcam C925e
> Bus info : platform:virtio-media
> Driver version : 7.1.0
> Capabilities : 0x84200001
> Video Capture
> Streaming
> Extended Pix Format
> Device Capabilities
> Device Caps : 0x04200001
> Video Capture
> Streaming
> Extended Pix Format
>
> Required ioctls:
> test VIDIOC_QUERYCAP: OK
> test invalid ioctls: OK
>
> Allow for multiple opens:
> test second /dev/video0 open: OK
> test VIDIOC_QUERYCAP: OK
> test VIDIOC_G/S_PRIORITY: OK
> test for unlimited opens: OK
>
> Debug ioctls:
> test VIDIOC_DBG_G/S_REGISTER: OK (Not Supported)
> test VIDIOC_LOG_STATUS: OK (Not Supported)
>
> Input ioctls:
> test VIDIOC_G/S_TUNER/ENUM_FREQ_BANDS: OK (Not Supported)
> test VIDIOC_G/S_FREQUENCY: OK (Not Supported)
> test VIDIOC_S_HW_FREQ_SEEK: OK
> test VIDIOC_ENUMAUDIO: OK (Not Supported)
> test VIDIOC_G/S/ENUMINPUT: OK
> test VIDIOC_G/S_AUDIO: OK (Not Supported)
> Inputs: 1 Audio Inputs: 0 Tuners: 0
>
> Output ioctls:
> test VIDIOC_G/S_MODULATOR: OK (Not Supported)
> test VIDIOC_G/S_FREQUENCY: OK (Not Supported)
> test VIDIOC_ENUMAUDOUT: OK (Not Supported)
> test VIDIOC_G/S/ENUMOUTPUT: OK (Not Supported)
> test VIDIOC_G/S_AUDOUT: OK (Not Supported)
> Outputs: 0 Audio Outputs: 0 Modulators: 0
>
> Input/Output configuration ioctls:
> test VIDIOC_ENUM/G/S/QUERY_STD: OK (Not Supported)
> test VIDIOC_ENUM/G/S/QUERY_DV_TIMINGS: OK (Not Supported)
> test VIDIOC_DV_TIMINGS_CAP: OK (Not Supported)
> test VIDIOC_G/S_EDID: OK (Not Supported)
>
> Control ioctls (Input 0):
> test VIDIOC_QUERY_EXT_CTRL/QUERYMENU: OK
> test VIDIOC_QUERYCTRL: OK
> test VIDIOC_G/S_CTRL: OK
> fail: v4l2-test-controls.cpp(981): ret (got 22)
> test VIDIOC_G/S/TRY_EXT_CTRLS: FAIL
> test VIDIOC_(UN)SUBSCRIBE_EVENT/DQEVENT: OK
> test VIDIOC_G/S_JPEGCOMP: OK (Not Supported)
> Standard Controls: 19 Private Controls: 0
>
> Format ioctls (Input 0):
> test VIDIOC_ENUM_FMT/FRAMESIZES/FRAMEINTERVALS: OK
> test VIDIOC_G/S_PARM: OK
> test VIDIOC_G_FBUF: OK (Not Supported)
> test VIDIOC_G_FMT: OK
> test VIDIOC_TRY_FMT: OK
> test VIDIOC_S_FMT: OK
> test VIDIOC_G_SLICED_VBI_CAP: OK (Not Supported)
> test Cropping: OK (Not Supported)
> test Composing: OK (Not Supported)
> test Scaling: OK (Not Supported)
>
> Codec ioctls (Input 0):
> test VIDIOC_(TRY_)ENCODER_CMD: OK (Not Supported)
> test VIDIOC_G_ENC_INDEX: OK (Not Supported)
> test VIDIOC_(TRY_)DECODER_CMD: OK (Not Supported)
>
> Buffer ioctls (Input 0):
> test VIDIOC_REQBUFS/CREATE_BUFS/QUERYBUF: OK
> test CREATE_BUFS maximum buffers: OK
> test VIDIOC_REMOVE_BUFS: OK
> test VIDIOC_EXPBUF: OK (Not Supported)
> test Requests: OK (Not Supported)
> test blocking wait: OK
>
> Test input 0:
>
> Streaming ioctls:
> test read/write: OK (Not Supported)
>
> Video Capture: Frame #000
> Video Capture: Frame #001
> Video Capture: Frame #002
> Video Capture: Frame #003
> Video Capture: Frame #004
> Video Capture: Frame #005
> Video Capture: Frame #006
> Video Capture: Frame #007
> Video Capture: Frame #008
> Video Capture: Frame #009
> Video Capture: Frame #010
> Video Capture: Frame #011
> Video Capture: Frame #012
> Video Capture: Frame #013
> Video Capture: Frame #014
> Video Capture: Frame #015
> Video Capture: Frame #016
> Video Capture: Frame #017
> Video Capture: Frame #018
> Video Capture: Frame #019
> Video Capture: Frame #020
> Video Capture: Frame #021
> Video Capture: Frame #022
> Video Capture: Frame #023
> Video Capture: Frame #024
> Video Capture: Frame #025
> Video Capture: Frame #026
> Video Capture: Frame #027
> Video Capture: Frame #028
> Video Capture: Frame #029
> Video Capture: Frame #030
> Video Capture: Frame #031
> Video Capture: Frame #032
> Video Capture: Frame #033
> Video Capture: Frame #034
> Video Capture: Frame #035
> Video Capture: Frame #036
> Video Capture: Frame #037
> Video Capture: Frame #038
> Video Capture: Frame #039
> Video Capture: Frame #040
> Video Capture: Frame #041
> Video Capture: Frame #042
> Video Capture: Frame #043
> Video Capture: Frame #044
> Video Capture: Frame #045
> Video Capture: Frame #046
> Video Capture: Frame #047
> Video Capture: Frame #048
> Video Capture: Frame #049
> Video Capture: Frame #050
> Video Capture: Frame #051
> Video Capture: Frame #052
> Video Capture: Frame #053
> Video Capture: Frame #054
> Video Capture: Frame #055
> Video Capture: Frame #056
> Video Capture: Frame #057
> Video Capture: Frame #058
> Video Capture: Frame #059
>
> test MMAP (no poll, REQBUFS): OK
>
> Video Capture: Frame #000 (select)
> Video Capture: Frame #001 (select)
> Video Capture: Frame #002 (select)
> Video Capture: Frame #003 (select)
> Video Capture: Frame #004 (select)
> Video Capture: Frame #005 (select)
> Video Capture: Frame #006 (select)
> Video Capture: Frame #007 (select)
> Video Capture: Frame #008 (select)
> Video Capture: Frame #009 (select)
> Video Capture: Frame #010 (select)
> Video Capture: Frame #011 (select)
> Video Capture: Frame #012 (select)
> Video Capture: Frame #013 (select)
> Video Capture: Frame #014 (select)
> Video Capture: Frame #015 (select)
> Video Capture: Frame #016 (select)
> Video Capture: Frame #017 (select)
> Video Capture: Frame #018 (select)
> Video Capture: Frame #019 (select)
> Video Capture: Frame #020 (select)
> Video Capture: Frame #021 (select)
> Video Capture: Frame #022 (select)
> Video Capture: Frame #023 (select)
> Video Capture: Frame #024 (select)
> Video Capture: Frame #025 (select)
> Video Capture: Frame #026 (select)
> Video Capture: Frame #027 (select)
> Video Capture: Frame #028 (select)
> Video Capture: Frame #029 (select)
> Video Capture: Frame #030 (select)
> Video Capture: Frame #031 (select)
> Video Capture: Frame #032 (select)
> Video Capture: Frame #033 (select)
> Video Capture: Frame #034 (select)
> Video Capture: Frame #035 (select)
> Video Capture: Frame #036 (select)
> Video Capture: Frame #037 (select)
> Video Capture: Frame #038 (select)
> Video Capture: Frame #039 (select)
> Video Capture: Frame #040 (select)
> Video Capture: Frame #041 (select)
> Video Capture: Frame #042 (select)
> Video Capture: Frame #043 (select)
> Video Capture: Frame #044 (select)
> Video Capture: Frame #045 (select)
> Video Capture: Frame #046 (select)
> Video Capture: Frame #047 (select)
> Video Capture: Frame #048 (select)
> Video Capture: Frame #049 (select)
> Video Capture: Frame #050 (select)
> Video Capture: Frame #051 (select)
> Video Capture: Frame #052 (select)
> Video Capture: Frame #053 (select)
> Video Capture: Frame #054 (select)
> Video Capture: Frame #055 (select)
> Video Capture: Frame #056 (select)
> Video Capture: Frame #057 (select)
> Video Capture: Frame #058 (select)
> Video Capture: Frame #059 (select)
>
> test MMAP (select, REQBUFS): OK
>
> Video Capture: Frame #000 (epoll)
> Video Capture: Frame #001 (epoll)
> Video Capture: Frame #002 (epoll)
> Video Capture: Frame #003 (epoll)
> Video Capture: Frame #004 (epoll)
> Video Capture: Frame #005 (epoll)
> Video Capture: Frame #006 (epoll)
> Video Capture: Frame #007 (epoll)
> Video Capture: Frame #008 (epoll)
> Video Capture: Frame #009 (epoll)
> Video Capture: Frame #010 (epoll)
> Video Capture: Frame #011 (epoll)
> Video Capture: Frame #012 (epoll)
> Video Capture: Frame #013 (epoll)
> Video Capture: Frame #014 (epoll)
> Video Capture: Frame #015 (epoll)
> Video Capture: Frame #016 (epoll)
> Video Capture: Frame #017 (epoll)
> Video Capture: Frame #018 (epoll)
> Video Capture: Frame #019 (epoll)
> Video Capture: Frame #020 (epoll)
> Video Capture: Frame #021 (epoll)
> Video Capture: Frame #022 (epoll)
> Video Capture: Frame #023 (epoll)
> Video Capture: Frame #024 (epoll)
> Video Capture: Frame #025 (epoll)
> Video Capture: Frame #026 (epoll)
> Video Capture: Frame #027 (epoll)
> Video Capture: Frame #028 (epoll)
> Video Capture: Frame #029 (epoll)
> Video Capture: Frame #030 (epoll)
> Video Capture: Frame #031 (epoll)
> Video Capture: Frame #032 (epoll)
> Video Capture: Frame #033 (epoll)
> Video Capture: Frame #034 (epoll)
> Video Capture: Frame #035 (epoll)
> Video Capture: Frame #036 (epoll)
> Video Capture: Frame #037 (epoll)
> Video Capture: Frame #038 (epoll)
> Video Capture: Frame #039 (epoll)
> Video Capture: Frame #040 (epoll)
> Video Capture: Frame #041 (epoll)
> Video Capture: Frame #042 (epoll)
> Video Capture: Frame #043 (epoll)
> Video Capture: Frame #044 (epoll)
> Video Capture: Frame #045 (epoll)
> Video Capture: Frame #046 (epoll)
> Video Capture: Frame #047 (epoll)
> Video Capture: Frame #048 (epoll)
> Video Capture: Frame #049 (epoll)
> Video Capture: Frame #050 (epoll)
> Video Capture: Frame #051 (epoll)
> Video Capture: Frame #052 (epoll)
> Video Capture: Frame #053 (epoll)
> Video Capture: Frame #054 (epoll)
> Video Capture: Frame #055 (epoll)
> Video Capture: Frame #056 (epoll)
> Video Capture: Frame #057 (epoll)
> Video Capture: Frame #058 (epoll)
> Video Capture: Frame #059 (epoll)
>
> test MMAP (epoll, REQBUFS): OK
>
> Video Capture: Frame #000
> Video Capture: Frame #001
> Video Capture: Frame #002
> Video Capture: Frame #003
> Video Capture: Frame #004
> Video Capture: Frame #005
> Video Capture: Frame #006
> Video Capture: Frame #007
> Video Capture: Frame #008
> Video Capture: Frame #009
> Video Capture: Frame #010
> Video Capture: Frame #011
> Video Capture: Frame #012
> Video Capture: Frame #013
> Video Capture: Frame #014
> Video Capture: Frame #015
> Video Capture: Frame #016
> Video Capture: Frame #017
> Video Capture: Frame #018
> Video Capture: Frame #019
> Video Capture: Frame #020
> Video Capture: Frame #021
> Video Capture: Frame #022
> Video Capture: Frame #023
> Video Capture: Frame #024
> Video Capture: Frame #025
> Video Capture: Frame #026
> Video Capture: Frame #027
> Video Capture: Frame #028
> Video Capture: Frame #029
> Video Capture: Frame #030
> Video Capture: Frame #031
> Video Capture: Frame #032
> Video Capture: Frame #033
> Video Capture: Frame #034
> Video Capture: Frame #035
> Video Capture: Frame #036
> Video Capture: Frame #037
> Video Capture: Frame #038
> Video Capture: Frame #039
> Video Capture: Frame #040
> Video Capture: Frame #041
> Video Capture: Frame #042
> Video Capture: Frame #043
> Video Capture: Frame #044
> Video Capture: Frame #045
> Video Capture: Frame #046
> Video Capture: Frame #047
> Video Capture: Frame #048
> Video Capture: Frame #049
> Video Capture: Frame #050
> Video Capture: Frame #051
> Video Capture: Frame #052
> Video Capture: Frame #053
> Video Capture: Frame #054
> Video Capture: Frame #055
> Video Capture: Frame #056
> Video Capture: Frame #057
> Video Capture: Frame #058
> Video Capture: Frame #059
>
> test MMAP (no poll, CREATE_BUFS): OK
>
> Video Capture: Frame #000 (select)
> Video Capture: Frame #001 (select)
> Video Capture: Frame #002 (select)
> Video Capture: Frame #003 (select)
> Video Capture: Frame #004 (select)
> Video Capture: Frame #005 (select)
> Video Capture: Frame #006 (select)
> Video Capture: Frame #007 (select)
> Video Capture: Frame #008 (select)
> Video Capture: Frame #009 (select)
> Video Capture: Frame #010 (select)
> Video Capture: Frame #011 (select)
> Video Capture: Frame #012 (select)
> Video Capture: Frame #013 (select)
> Video Capture: Frame #014 (select)
> Video Capture: Frame #015 (select)
> Video Capture: Frame #016 (select)
> Video Capture: Frame #017 (select)
> Video Capture: Frame #018 (select)
> Video Capture: Frame #019 (select)
> Video Capture: Frame #020 (select)
> Video Capture: Frame #021 (select)
> Video Capture: Frame #022 (select)
> Video Capture: Frame #023 (select)
> Video Capture: Frame #024 (select)
> Video Capture: Frame #025 (select)
> Video Capture: Frame #026 (select)
> Video Capture: Frame #027 (select)
> Video Capture: Frame #028 (select)
> Video Capture: Frame #029 (select)
> Video Capture: Frame #030 (select)
> Video Capture: Frame #031 (select)
> Video Capture: Frame #032 (select)
> Video Capture: Frame #033 (select)
> Video Capture: Frame #034 (select)
> Video Capture: Frame #035 (select)
> Video Capture: Frame #036 (select)
> Video Capture: Frame #037 (select)
> Video Capture: Frame #038 (select)
> Video Capture: Frame #039 (select)
> Video Capture: Frame #040 (select)
> Video Capture: Frame #041 (select)
> Video Capture: Frame #042 (select)
> Video Capture: Frame #043 (select)
> Video Capture: Frame #044 (select)
> Video Capture: Frame #045 (select)
> Video Capture: Frame #046 (select)
> Video Capture: Frame #047 (select)
> Video Capture: Frame #048 (select)
> Video Capture: Frame #049 (select)
> Video Capture: Frame #050 (select)
> Video Capture: Frame #051 (select)
> Video Capture: Frame #052 (select)
> Video Capture: Frame #053 (select)
> Video Capture: Frame #054 (select)
> Video Capture: Frame #055 (select)
> Video Capture: Frame #056 (select)
> Video Capture: Frame #057 (select)
> Video Capture: Frame #058 (select)
> Video Capture: Frame #059 (select)
>
> test MMAP (select, CREATE_BUFS): OK
>
> Video Capture: Frame #000 (epoll)
> Video Capture: Frame #001 (epoll)
> Video Capture: Frame #002 (epoll)
> Video Capture: Frame #003 (epoll)
> Video Capture: Frame #004 (epoll)
> Video Capture: Frame #005 (epoll)
> Video Capture: Frame #006 (epoll)
> Video Capture: Frame #007 (epoll)
> Video Capture: Frame #008 (epoll)
> Video Capture: Frame #009 (epoll)
> Video Capture: Frame #010 (epoll)
> Video Capture: Frame #011 (epoll)
> Video Capture: Frame #012 (epoll)
> Video Capture: Frame #013 (epoll)
> Video Capture: Frame #014 (epoll)
> Video Capture: Frame #015 (epoll)
> Video Capture: Frame #016 (epoll)
> Video Capture: Frame #017 (epoll)
> Video Capture: Frame #018 (epoll)
> Video Capture: Frame #019 (epoll)
> Video Capture: Frame #020 (epoll)
> Video Capture: Frame #021 (epoll)
> Video Capture: Frame #022 (epoll)
> Video Capture: Frame #023 (epoll)
> Video Capture: Frame #024 (epoll)
> Video Capture: Frame #025 (epoll)
> Video Capture: Frame #026 (epoll)
> Video Capture: Frame #027 (epoll)
> Video Capture: Frame #028 (epoll)
> Video Capture: Frame #029 (epoll)
> Video Capture: Frame #030 (epoll)
> Video Capture: Frame #031 (epoll)
> Video Capture: Frame #032 (epoll)
> Video Capture: Frame #033 (epoll)
> Video Capture: Frame #034 (epoll)
> Video Capture: Frame #035 (epoll)
> Video Capture: Frame #036 (epoll)
> Video Capture: Frame #037 (epoll)
> Video Capture: Frame #038 (epoll)
> Video Capture: Frame #039 (epoll)
> Video Capture: Frame #040 (epoll)
> Video Capture: Frame #041 (epoll)
> Video Capture: Frame #042 (epoll)
> Video Capture: Frame #043 (epoll)
> Video Capture: Frame #044 (epoll)
> Video Capture: Frame #045 (epoll)
> Video Capture: Frame #046 (epoll)
> Video Capture: Frame #047 (epoll)
> Video Capture: Frame #048 (epoll)
> Video Capture: Frame #049 (epoll)
> Video Capture: Frame #050 (epoll)
> Video Capture: Frame #051 (epoll)
> Video Capture: Frame #052 (epoll)
> Video Capture: Frame #053 (epoll)
> Video Capture: Frame #054 (epoll)
> Video Capture: Frame #055 (epoll)
> Video Capture: Frame #056 (epoll)
> Video Capture: Frame #057 (epoll)
> Video Capture: Frame #058 (epoll)
> Video Capture: Frame #059 (epoll)
>
> test MMAP (epoll, CREATE_BUFS): OK
> test USERPTR (no poll): OK (Not Supported)
> test USERPTR (select): OK (Not Supported)
> test DMABUF (no poll): OK (Not Supported)
> test DMABUF (select): OK (Not Supported)
>
> Total for uvcvideo device /dev/video0: 59, Succeeded: 58, Failed: 1,
> Warnings: 0
>
> ---
> Changes in v5:
> - Add DMA buffer alignment and padding for commands, responses, and the event
> buffer
> - Corrected styling of kernel-doc comments
> - Removed the configurable ``driver_name`` module parameter
> - Moved the protocol to ``include/uapi/linux/virtio_media.h``
> - Link to v4:
> https://lore.kernel.org/all/[email protected]/
>
> Changes in v4:
> - Rebased on top of v7.1-rc1
> - Replace usages of filep->private_data with file_to_v4l2_fh()
> throughout the driver
> - Link to v3:
> https://lore.kernel.org/r/[email protected]
>
> Changes in v3:
> - Rebased on top of v6.15-rc1 and removes obsolete control callbacks.
> - Link to v2:
> https://lore.kernel.org/r/[email protected]
>
> Changes in v2:
> - Fixed kernel test robot and media CI warnings (ignored a few false
> positives).
> - Changed in-driver email address to personal one since my Google one
> will soon become invalid.
> - Link to v1:
> https://lore.kernel.org/r/[email protected]
>
> Brian Daniels (5):
> media: virtio: Add skeleton virtio-media driver
> media: virtio: Add session management
> media: virtio: Add scatterlist builder
> media: virtio: Add ioctl operations and driver logic
> media: virtio: Add USERPTR memory type support
>
> MAINTAINERS | 8 +
> drivers/media/Kconfig | 13 +
> drivers/media/Makefile | 2 +
> drivers/media/virtio/Makefile | 7 +
> drivers/media/virtio/scatterlist_builder.c | 579 +++++++++
> drivers/media/virtio/scatterlist_builder.h | 112 ++
> drivers/media/virtio/session.h | 132 ++
> drivers/media/virtio/virtio_media.h | 97 ++
> drivers/media/virtio/virtio_media_driver.c | 951 ++++++++++++++
> drivers/media/virtio/virtio_media_ioctls.c | 1326 ++++++++++++++++++++
> include/uapi/linux/virtio_media.h | 287 +++++
> 11 files changed, 3514 insertions(+)
> create mode 100644 drivers/media/virtio/Makefile
> create mode 100644 drivers/media/virtio/scatterlist_builder.c
> create mode 100644 drivers/media/virtio/scatterlist_builder.h
> create mode 100644 drivers/media/virtio/session.h
> create mode 100644 drivers/media/virtio/virtio_media.h
> create mode 100644 drivers/media/virtio/virtio_media_driver.c
> create mode 100644 drivers/media/virtio/virtio_media_ioctls.c
> create mode 100644 include/uapi/linux/virtio_media.h
>
>
> base-commit: 06cb687a5132fcffe624c0070576ab852ac6b568
> --
> 2.55.0.229.g6434b31f56-goog
>
