On Tue, 1 Sep 2020 at 18:59, Ilia Mirkin <imir...@alum.mit.edu> wrote:
> On Tue, Sep 1, 2020 at 9:10 AM Analabha Roy <hariseldo...@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: dan...@utexas.edu, a...@phys.buruniv.ac.in, hariseldo...@gmail.com Webpage: http://www.ph.utexas.edu/~daneel/
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