Re: device-specific "vdpau" support?

[maya%netbsd.org@localhost]

On Sat, Jun 29, 2019 at 11:19:26PM +0100, Robert Swindells wrote:
> 
> Rhialto <rhialto%falu.nl@localhost> wrote:
> >On Sat 29 Jun 2019 at 20:55:16 +0000, maya%netbsd.org@localhost wrote:
> >> Supposedly it's even more efficient video decoding, but I didn't do a
> >> comparison (It would be pretty easy to do, since pkgsrc mesa does build
> >> VDPAU).
> >
> >With the Linux I now have on my Pinebook, there are vdpau drivers for
> >the graphics chipset, but no "regular" acceleration. As a result, video
> >players can play 1080p videos perfectly, as long as you don't try to use
> >anything GUI-ish, because that is still slow as molasses...
> 
> Linux on the Pinebook should be able to have accelerated graphics. You
> may need to add some binary blobs for the GPU to enable it.
> 
> The Pinebook SoC has video decoder hardware that is separate from the
> Mali GPU. We probably need to decide which API to support for it.
> 
> I suspect the efficiency depends on whether you are doing both decode
> and display in hardware or GPU software or whether the main CPU is doing
> the decode part.
> 
> Latest x11 has broken accelerated video playback on my one Intel GPU
> system, it used to have a working XV driver.
> 
> Might be worth documenting which GPU models use particular acceleration
> methods to know what has been tested.

someone(tm) (who probably doesn't want to be identified) said, if you are
playing on pinebook with mpv, your best bet is mpv -vo drm outside of X.
and right now it wastes a lot of resources converting yuv to rgb,
because it doesn't detect yuv support.