Fwd: Is support for DMA-BUF possible or planned?

Thanks a lot! I applied a patch similar to the one used in x11-wm/magpie to
x11-toolkits/gtk40 and the newest webkit started to work
without WEBKIT_DISABLE_DMABUF_RENDERER and with WebGL support. I think I'll
send a patch to the port tomorrow.

вт, 27 авг. 2024 г. в 12:23, Jan Beich <[email protected]>:

> (redirecting from desktop@ list)
>
> Vasily Postnicov <[email protected]> writes:
>
> > Hi! I maintain my own port of webkitgtk. In version 2.44.0 WebKit's
> > developers broke WebGL support on systems which do not have DMA-BUF (all
> > systems but Linux, maybe). Is support for DMA-BUF possible or planned in
> > FreeBSD as a part of the Linux compatibility layer?
>
> DMA-BUF works fine natively and required by DRI3, EGL + VA-API interop,
> Wayland.
> Explicit sync isn't supported yet, see
> https://github.com/freebsd/drm-kmod/issues/278
> Note, DMA-BUF on NVIDIA GPUs requires installing nvidia-drm-kmod package.
>
> <dma-buf.h> header only provides *_SYNC and *_SYNC_FILE ioctls. Consumers
> like Mesa usually bundle the header or the relevant macros like in
> x11-wm/magpie/files/patch-cogl_cogl_cogl-dma-buf-handle.c (based on bug
> 271823).
>
> *_SYNC may be broken per
> https://github.com/FreeBSDDesktop/kms-drm/issues/156
> but nothing critical depends on it and likely obsoleted by *_SYNC_FILE,
> anyway.
>
> Related:
>
> https://github.com/dragonflybsd/dragonflybsd/tree/master/sys/dev/drm/linux_dma-buf.c
> https://github.com/freebsd/drm-kmod/tree/master/drivers/dma-buf/dma-buf.c
>
> https://github.com/evadot/drm-subtree/tree/master/drmkpi/drmcompat_dma_buf.c
>
> https://github.com/NetBSD/src/blob/trunk/sys/external/bsd/drm2/linux/linux_dma_buf.c
>