On Tue, 1 Sep 2020 at 18:59, Ilia Mirkin <imirkin@xxxxxxxxxxxx> wrote:
On Tue, Sep 1, 2020 at 9:10 AM Analabha Roy <hariseldon99@xxxxxxxxx> 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
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
Golapbag Campus, Barddhaman 713104
West Bengal, India
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