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backend/wayland: add support for explicit sync

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wl_buffer.release event delivery becomes undefined when using the
linux-drm-syncobj-v1 protocol, so we need to wait for buffer
release via a timeline point instead.

The protocol requires both wait and signal timelines to be set, so
we need to create one when the compositor only supplies a wait
timeline.
This commit is contained in:
Simon Ser 2024-10-26 19:19:41 +02:00 • committed by Simon Zeni
parent ca29f43a54
commit e9a6b3b85d
4 changed files with 195 additions and 5 deletions
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15
backend/wayland/backend.c
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@ -21,6 +21,7 @@
#include "drm-client-protocol.h"
#include "linux-dmabuf-v1-client-protocol.h"
#include "linux-drm-syncobj-v1-client-protocol.h"
#include "pointer-gestures-unstable-v1-client-protocol.h"
#include "presentation-time-client-protocol.h"
#include "xdg-activation-v1-client-protocol.h"
@ -411,6 +412,9 @@ static void registry_global(void *data, struct wl_registry *registry,
} else if (strcmp(iface, wp_viewporter_interface.name) == 0) {
wl->viewporter = wl_registry_bind(registry, name,
&wp_viewporter_interface, 1);
} else if (strcmp(iface, wp_linux_drm_syncobj_manager_v1_interface.name) == 0) {
wl->drm_syncobj_manager_v1 = wl_registry_bind(registry, name,
&wp_linux_drm_syncobj_manager_v1_interface, 1);
}
}
@ -484,6 +488,11 @@ static void backend_destroy(struct wlr_backend *backend) {
destroy_wl_buffer(buffer);
}
struct wlr_wl_drm_syncobj_timeline *timeline, *tmp_timeline;
wl_list_for_each_safe(timeline, tmp_timeline, &wl->drm_syncobj_timelines, link) {
destroy_wl_drm_syncobj_timeline(timeline);
}
wlr_backend_finish(backend);
wl_list_remove(&wl->event_loop_destroy.link);
@ -518,6 +527,9 @@ static void backend_destroy(struct wlr_backend *backend) {
if (wl->zwp_linux_dmabuf_v1) {
zwp_linux_dmabuf_v1_destroy(wl->zwp_linux_dmabuf_v1);
}
if (wl->drm_syncobj_manager_v1) {
wp_linux_drm_syncobj_manager_v1_destroy(wl->drm_syncobj_manager_v1);
}
if (wl->legacy_drm != NULL) {
wl_drm_destroy(wl->legacy_drm);
}
@ -592,6 +604,7 @@ struct wlr_backend *wlr_wl_backend_create(struct wl_event_loop *loop,
wl_list_init(&wl->outputs);
wl_list_init(&wl->seats);
wl_list_init(&wl->buffers);
wl_list_init(&wl->drm_syncobj_timelines);
if (remote_display != NULL) {
wl->remote_display = remote_display;
@ -624,6 +637,8 @@ struct wlr_backend *wlr_wl_backend_create(struct wl_event_loop *loop,
goto error_registry;
}
wl->backend.features.timeline = wl->drm_syncobj_manager_v1 != NULL;
wl_display_roundtrip(wl->remote_display); // process initial event bursts
struct zwp_linux_dmabuf_feedback_v1 *linux_dmabuf_feedback_v1 = NULL;