[Nouveau] VAAPI on GeForce GT 620M

[Julien Isorce]

Hi,

Try:  DRI_PRIME=1 LIBVA_DRIVER_NAME=nouveau vainfo --display drm --device
/dev/dri/renderD129

Also try with and without the --device option, the important one is
--display drm

Cheers
Julien

On Tue, Sep 1, 2020 at 10:49 AM Analabha Roy <hariseldon99 at gmail.com> wrote:

>
>
> On Tue, 1 Sep 2020 at 18:59, Ilia Mirkin <imirkin at alum.mit.edu> wrote:
>
>> On Tue, Sep 1, 2020 at 9:10 AM Analabha Roy <hariseldon99 at gmail.com>
>> wrote:
>> > Any suggestions on how to trace the config issues? Do I have to debug
>> the va_openDriver() function?
>>
>> My guess, without reading any code, is that DRI_PRIME isn't doing what
>> you want it to, and the nouveau driver is being handed an intel
>> device. This does not work well. Fixing this will require tracing
>> through the va winsys code which to figure out how it invokes the
>> loader.
>>
>>
>> https://cgit.freedesktop.org/mesa/mesa/tree/src/gallium/frontends/va/context.c#n111
>>
>> For the DRM/rendernodes "platform", it will just take whatever fd it
>> is given. vainfo appears to give it a fixed device:
>>
>>
>> https://github.com/intel/libva-utils/blob/master/common/va_display_drm.c#L39
>>
>> However it looks like you can pass in --device /dev/dri/renderD129 or
>> whatever the right one is, which should pass in the right render node,
>> as seen here:
>>
>> https://github.com/intel/libva-utils/blob/master/common/va_display.c#L80
>>
>> Note that I've never tried this, just did a few google searches to
>> find this stuff.
>>
>>
> Brilliant googling. get_drm_device_name() does seem to do a crude argparse
> of "--device"
>
> So I ran
>
> $ DRI_PRIME=1 LIBVA_DRIVER_NAME=nouveau vainfo --device /dev/dri/renderD128
>
> *vainfo: unrecognized option '--device'*Show information from VA-API
> driver
> Usage: vainfo --help
>         --help print this message
>
> Usage: vainfo [options]
> Display options:
>         --display display | help         Show information for the
> specified display, or the available display list
>
> *        --device device                  Set device name, only available
> under drm display*
>
>
> What does this mean?
>
>  Note that I also ran
>
>
> $ nm -Dn -o /usr/lib/x86_64-linux-gnu/libva*|grep get_drm_device_name
>
> Didn't get anything...
>
> Cheers,
>>
>>   -ilia
>>
>
>
> --
> Analabha Roy
> Assistant Professor
> Department of Physics
> <http://www.buruniv.ac.in/academics/department/physics>
> The University of Burdwan <http://www.buruniv.ac.in/>
> Golapbag Campus, Barddhaman 713104
> West Bengal, India
> Emails: daneel at utexas.edu, aroy at phys.buruniv.ac.in, hariseldon99 at gmail.com
> Webpage: http://www.ph.utexas.edu/~daneel/
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