[Nouveau] VAAPI on GeForce GT 620M

[Analabha Roy]

On Tue, Sep 1, 2020, 23:28 Julien Isorce <julien.isorce at gmail.com> wrote:

> 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
>




Nada, and nada. Exact same error as before, both cases.

waah!


> 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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>>
>
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