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backend/drm: add explicit sync support to multi-GPU blits

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This commit is contained in:
Simon Ser 2024-08-05 19:12:53 +02:00
parent 3187479c07
commit d7223eae02
5 changed files with 60 additions and 10 deletions
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24
backend/drm/renderer.c
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@ -1,5 +1,6 @@
#include <assert.h>
#include <drm_fourcc.h>
#include <wlr/render/drm_syncobj.h>
#include <wlr/render/swapchain.h>
#include <wlr/render/wlr_renderer.h>
#include <wlr/util/log.h>
@ -46,6 +47,7 @@ void finish_drm_surface(struct wlr_drm_surface *surf) {
return;
}
wlr_drm_syncobj_timeline_unref(surf->timeline);
wlr_swapchain_destroy(surf->swapchain);
*surf = (struct wlr_drm_surface){0};
@ -68,13 +70,24 @@ bool init_drm_surface(struct wlr_drm_surface *surf,
return false;
}
int drm_fd = wlr_renderer_get_drm_fd(renderer->wlr_rend);
if (renderer->wlr_rend->features.timeline && drm_fd >= 0) {
surf->timeline = wlr_drm_syncobj_timeline_create(drm_fd);
if (surf->timeline == NULL) {
finish_drm_surface(surf);
wlr_log(WLR_ERROR, "Failed to create DRM syncobj timeline");
return false;
}
}
surf->renderer = renderer;
return true;
}
struct wlr_buffer *drm_surface_blit(struct wlr_drm_surface *surf,
struct wlr_buffer *buffer) {
struct wlr_buffer *buffer,
struct wlr_drm_syncobj_timeline *wait_timeline, uint64_t wait_point) {
struct wlr_renderer *renderer = surf->renderer->wlr_rend;
if (surf->swapchain->width != buffer->width ||
@ -95,7 +108,12 @@ struct wlr_buffer *drm_surface_blit(struct wlr_drm_surface *surf,
goto error_tex;
}
struct wlr_render_pass *pass = wlr_renderer_begin_buffer_pass(renderer, dst, NULL);
surf->point++;
const struct wlr_buffer_pass_options pass_options = {
.signal_timeline = surf->timeline,
.signal_point = surf->point,
};
struct wlr_render_pass *pass = wlr_renderer_begin_buffer_pass(renderer, dst, &pass_options);
if (pass == NULL) {
wlr_log(WLR_ERROR, "Failed to begin render pass with multi-GPU destination buffer");
goto error_dst;
@ -104,6 +122,8 @@ struct wlr_buffer *drm_surface_blit(struct wlr_drm_surface *surf,
wlr_render_pass_add_texture(pass, &(struct wlr_render_texture_options){
.texture = tex,
.blend_mode = WLR_RENDER_BLEND_MODE_NONE,
.wait_timeline = wait_timeline,
.wait_point = wait_point,
});
if (!wlr_render_pass_submit(pass)) {
wlr_log(WLR_ERROR, "Failed to submit multi-GPU render pass");