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[WIP] alternative split devices #417

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Closed

[WIP] alternative split devices #417

wants to merge 28 commits into from

Commits on Mar 13, 2021

  1. clang-format 

    Signed-off-by: You-Sheng Yang <vicamo@gmail.com>
    @vicamo
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Commits on Mar 17, 2021

  1. Merge remote-tracking branch 'vicamo-github/for-upstream/fix-v4l2-com… 

    …pliance-errors'
    @vicamo
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  2. drop hacks for linux<<3

    @umlaeute @vicamo
    umlaeute authored and vicamo committed Mar 17, 2021
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  3. mention that linux<<3.0.0 is unsupported

    @umlaeute @vicamo
    umlaeute authored and vicamo committed Mar 17, 2021
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  4. drop VIDIOCGMBUF support 

    V4L1 has been completely removed from kernel since 2.6.39.
    @vicamo
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  5. drop useless address-operator from function-tables

    @umlaeute @vicamo
    umlaeute authored and vicamo committed Mar 17, 2021
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  6. mod: add output_nr module parameter in parallel with video_nr 

    Signed-off-by: You-Sheng Yang <vicamo@gmail.com>
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  7. keep track of both output_nr and capture_nr in IDR 

    With this change, output_nr will be allocated and deallocated as
capture_nr is, but currently saved with no other reference to it.

Signed-off-by: You-Sheng Yang <vicamo@gmail.com>
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  8. refactor v4l2loopback_lookup 

    Since now both output_nr and capture_nr are meaningful, don't return
either of them.

Signed-off-by: You-Sheng Yang <vicamo@gmail.com>
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  9. cache vdev for latter uses 

    Signed-off-by: You-Sheng Yang <vicamo@gmail.com>
    @vicamo
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  10. embed struct video_device into v4l2_loopback_device 

    Signed-off-by: You-Sheng Yang <vicamo@gmail.com>
    @vicamo
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  11. set v4l2_loopback_device addr as video_device drvdata instead 

    Converting function v4l2loopback_cd2dev and v4l2loopback_getdevice
searches v4l2loopback_index_idr with device number retrieved from
video_device drvdata, but this could be time consuming and creates
unecessary complexity. And since we may need to retrieve
v4l2_loopback_device address from callbacks shared between capture and
output devices, this patch reuses video_device drvdata instead of struct
member offsets.

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  12. move v4l2_loopback_device->vdev into v4l2_loopback_device->capture 

    Signed-off-by: You-Sheng Yang <vicamo@gmail.com>
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  13. move all vdev init procedures into init_vdev 

    Signed-off-by: You-Sheng Yang <vicamo@gmail.com>
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  14. fix cap->device_caps may not be defined before v3.3 

    Also use V4L2_CAP_DEVICE_CAPS to detect this instead of hardcoded kernel
version.

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  15. don't change device state in vidioc_s_fmt_out 

    Signed-off-by: You-Sheng Yang <vicamo@gmail.com>
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  16. create a draft output video_device 

    Signed-off-by: You-Sheng Yang <vicamo@gmail.com>
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  17. remove dev->output_nr 

    Since we have already instantiated an output video device, use its `num`
field instead.

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  18. output: add ioctl handlers 

    Signed-off-by: You-Sheng Yang <vicamo@gmail.com>
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  19. re-implement a separate output device 

    Signed-off-by: You-Sheng Yang <vicamo@gmail.com>
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  20. prepare to share output/capture entity init 

    Signed-off-by: You-Sheng Yang <vicamo@gmail.com>
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  21. capture: init vb2_queue 

    Signed-off-by: You-Sheng Yang <vicamo@gmail.com>
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  22. capture: use fops callback from videobuf2 

    Signed-off-by: You-Sheng Yang <vicamo@gmail.com>
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  23. [wip] reimplement capture entity using videobuf2 

    Signed-off-by: You-Sheng Yang <vicamo@gmail.com>
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Commits on Mar 18, 2021

  1. Merge branch 'develop' into split-device

    @umlaeute
    umlaeute committed Mar 18, 2021
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Commits on Mar 19, 2021

  1. clang-format

    @umlaeute
    umlaeute committed Mar 19, 2021
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  2. simplified capabilities logic (with only split-devices), setting CAPT… 

    …URE only for capture devices
    @umlaeute
    umlaeute committed Mar 19, 2021
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  3. set device transfer direction

    @umlaeute
    umlaeute committed Mar 19, 2021
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