On 2021-09-13 14:40, Luc Ma wrote:
> Hello,
>
> I recently tried multi-GPU support on the mesa gallium drivers(glx=dri). When
> I exported the env `DRI_PRIME=1`, I found that it didn't work with two
> different drivers loaded at the same time.
> because there are different driver names in my case. display_gpu driver name
> is "r600" while render_gpu driver name is "nouveau". It failed to create
> display gpu screen
>
> if (strcmp(driverName, driverNameDisplayGPU) == 0) {
> psc->driScreenDisplayGPU =
> psc->image_driver->createNewScreen2(screen,
> psc->fd_display_gpu,
> pdp->loader_extensions,
> extensions,
> &driver_configs, psc);
> }
>
> so I am wondering
>
> - is it possible to use two GPUs from different vendors on a system with
> gallium? one is for display, another for rendering
> - is it possible to use two GPUs driven by a shared driver(say both "r600")
> on a system?
Both should work.
Did you hit a problem other than psc->driScreenDisplayGPU related code being
skipped (as is expected ATM with different drivers)?
--
Earthling Michel Dänzer | https://redhat.com
Libre software enthusiast | Mesa and X developer
