Re: [PATCH v1 0/2] NVIDIA Tegra20 video decoder driver

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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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