2014-04-14 22:37 GMT+02:00 Dave Airlie <airl...@gmail.com>: > On Sat, Apr 12, 2014 at 10:25 AM, Giovanni Campagna > <scampa.giova...@gmail.com> wrote: >> Hi everyone, >> >> Some time ago I sent patches to enable the swrast driver on >> GBM/DRM, and I did them in the dumbest way possible (that is, >> having GBM implement the dri-swrast interface), to make sure >> it would work without kernel support. >> This patch series is a little smarter, in that it creates >> more than one KMS buffer and has llvmpipe render directly >> into the KMS buffer, so we don't need to copy from the back >> to the shadow (before the kernel copies from the shadow to >> the front). >> >> For background, this is necessary to get mutter-wayland running >> inside VMs such as gnome-continuous, which has a qxl DRM driver. >> mutter-wayland only has a KMS/EGL rendering backend, and we >> have no intention to add pixman or fbdev. >> GNOME bug: https://bugzilla.gnome.org/show_bug.cgi?id=728059 >> >> The older patches were >> http://lists.freedesktop.org/archives/mesa-dev/2014-March/055113.html >> I can rebase if so is desired. > > I actually did something similiar that was qxl specific before, > (qxl-dri2-driver in my repo, though it had some problems I can barely > remember now), the only question I have is what does this produce? > another swrast_dri.so? and will it have any affect on current > scenarios?
The first patch (the one in the previous mail) only affects the loader, not the driver, so it works with the current swrast_dri. This set produces a swrast_dri2_dri.so, which is loaded only under the drm+gbm+dri backend, so it does not affect drisw+x11 and drisw+wayland. Also, it's not qxl specific, as far i'm told, because it uses the dumb ioctls, not the qxl gem. A qxl userspace driver with proper gem buffersharing would allow us to use it for accelerating composition on x11 too, but I'm not sure it's a real benefit, with wayland around the corner. Giovanni _______________________________________________ mesa-dev mailing list mesa-dev@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/mesa-dev
