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    SubjectRe: [PATCH v1 0/2] NVIDIA Tegra20 video decoder driver
    On Tue, Sep 26, 2017 at 01:15:41AM +0300, Dmitry Osipenko wrote:
    > This driver provides accelerated video decoding to NVIDIA Tegra20 SoC's,
    > it is a result of reverse-engineering efforts. Driver has been tested on
    > Toshiba AC100 and Acer A500, it should work on any Tegra20 device.
    >
    > In userspace this driver is utilized by libvdpau-tegra [0] that implements
    > VDPAU interface, so any video player that supports VDPAU can provide
    > accelerated video decoding on Tegra20 on Linux.

    Why not use the v4l2 api instead? Doesn't that provide the same needed
    user/kernel api here instead of creating yet-another-custom ioctl?

    thanks,

    greg k-h

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