wlroots/backend
Simon Ser 5dfaf5ea9c backend/drm: introduce wlr_drm_bo_handle_table
Using GBM to import DRM dumb buffers tends to not work well. By
using GBM we're calling some driver-specific functions in Mesa.
These functions check whether Mesa can work with the buffer.
Sometimes Mesa has requirements which differ from DRM dumb buffers
and the GBM import will fail (e.g. on amdgpu).

Instead, drop GBM and use drmPrimeFDToHandle directly. But there's
a twist: BO handles are not ref'counted by the kernel and need to
be ref'counted in user-space [1]. libdrm usually performs this
bookkeeping and is used under-the-hood by Mesa.

We can't re-use libdrm for this task without using driver-specific
APIs. So let's just re-implement the ref'counting logic in wlroots.
The wlroots implementation is inspired from amdgpu's in libdrm [2].

Closes: https://github.com/swaywm/wlroots/issues/2916

[1]: https://gitlab.freedesktop.org/mesa/drm/-/merge_requests/110
[2]: 1a4c0ec9ae/amdgpu/handle_table.c
2021-08-25 10:05:37 -04:00
..
drm backend/drm: introduce wlr_drm_bo_handle_table 2021-08-25 10:05:37 -04:00
headless Move allocator stuff into new directory 2021-08-25 09:57:20 -04:00
libinput backend: unify startup messages 2021-08-19 20:47:36 +02:00
multi backend: introduce wlr_backend_finish 2021-05-21 22:13:54 +02:00
noop backend/noop: drop attach_render/rollback_render 2021-07-29 09:48:33 -04:00
session backend/session: use DRM_PRIMARY_MINOR_NAME 2021-06-17 00:28:04 +02:00
wayland Move allocator stuff into new directory 2021-08-25 09:57:20 -04:00
x11 Move allocator stuff into new directory 2021-08-25 09:57:20 -04:00
backend.c Move allocator stuff into new directory 2021-08-25 09:57:20 -04:00
meson.build backend: make DRM and libinput backends optional 2021-07-22 09:56:38 -04:00