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Add new struct wlr_multi_gpu

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For development to continue on systems (such as optimus laptops) that
have multiple GPUs, we need a way to reference all of the renderers
that have been created for devices in the system. A wlr_multi_gpu
struct holds renderers coming from two different sources:
1. the primary renderer (given to us by the compositor)
2. drm sub backends, each of which has a renderer created for
   cross-GPU copies.

This change provides a way to access all of these from the same
place.
This commit is contained in:
Austin Shafer 2022-07-27 16:07:21 -04:00
parent ed8961b309
commit 5a38cc57c8
7 changed files with 142 additions and 4 deletions
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21
include/backend/multi.h
View file

@ -4,10 +4,31 @@
#include <wayland-util.h>
#include <wlr/backend/interface.h>
#include <wlr/backend/multi.h>
#include <wlr/render/allocator.h>
#include <wlr/render/wlr_renderer.h>
struct wlr_multi_gpu_device {
struct wlr_renderer *renderer;
struct wlr_allocator *allocator;
struct wl_list link;
};
/*
* Helper struct for tracking multiple renderers. This solves the
* problem of us having many renderers (primary, plus individual
* secondary GPU drm renderers) but not tracking them in one location.
* We can use this struct to access renderers for each GPU in
* the system all from one place. Will be populated by the renderer
* the compositor makes, plus every time a drm mgpu renderer is made.
*/
struct wlr_multi_gpu {
struct wl_list devices;
};
struct wlr_multi_backend {
struct wlr_backend backend;
struct wlr_multi_gpu *multi_gpu;
struct wl_list backends;
struct wl_listener event_loop_destroy;