Hi Thierry, On 15/02/2021 10:50, Thierry Reding wrote: > On Mon, Feb 15, 2021 at 10:10:26AM +0100, Neil Armstrong wrote: >> Hi, >> >> On 13/02/2021 11:15, Mikko Perttunen wrote: >>> Hi all, >>> >>> with the release of documentation headers for Tegra multimedia engines >>> (NVDEC, NVENC, NVJPG) [1], I have started working on the corresponding >>> implementations. Here's the first one, NVDEC. >>> >>> The kernel driver is a simple Falcon boot driver based on the VIC >>> driver. Some code sharing should be considered there in the future. >>> The userspace driver to accompany this is a bit more complicated - >>> I have expanded vaapi-tegra-driver[2] to support MPEG2 decoding. >>> It should be noted that the implementation is still very clunky >>> and has poor performance, but it's a start. >> >> Funny how all this tries to avoid all the DRM, remoteproc, V4L2-M2M stateless & co >> all the other vendors tries to make usage of... > > Care to elaborate why you think this is trying to avoid anything? Mikko > pointed you at the documentation for these engines, provided a link to > an open-source (albeit work in progress) userspace driver and posts an > extension to an existing DRM driver to add the required kernel > functionality. That's a standard approach for submitting this kind of > driver. Thanks for the reply, I didn't look extensively at all the documents & userspace libraries, but I wonder why this couldn't fit in the V4L2-M2M approach and avoid having userspace drivers and specific libraries to handle this. Neil > > Thierry >
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