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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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31
backend/drm/drm.c
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@ -14,6 +14,7 @@
#include <wayland-util.h>
#include <wlr/backend/interface.h>
#include <wlr/interfaces/wlr_output.h>
#include <wlr/render/drm_syncobj.h>
#include <wlr/render/wlr_renderer.h>
#include <wlr/util/box.h>
#include <wlr/util/log.h>
@ -693,6 +694,7 @@ static void drm_connector_state_init(struct wlr_drm_connector_state *state,
static void drm_connector_state_finish(struct wlr_drm_connector_state *state) {
drm_fb_clear(&state->primary_fb);
drm_fb_clear(&state->cursor_fb);
wlr_drm_syncobj_timeline_unref(state->wait_timeline);
}
static bool drm_connector_state_update_primary_fb(struct wlr_drm_connector *conn,
@ -707,6 +709,14 @@ static bool drm_connector_state_update_primary_fb(struct wlr_drm_connector *conn
struct wlr_drm_plane *plane = crtc->primary;
struct wlr_buffer *source_buf = state->base->buffer;
struct wlr_drm_syncobj_timeline *wait_timeline = NULL;
uint64_t wait_point = 0;
if (state->base->committed & WLR_OUTPUT_STATE_WAIT_TIMELINE) {
wait_timeline = state->base->wait_timeline;
wait_point = state->base->wait_point;
}
assert(state->wait_timeline == NULL);
struct wlr_buffer *local_buf;
if (drm->parent) {
struct wlr_drm_format format = {0};
@ -723,12 +733,23 @@ static bool drm_connector_state_update_primary_fb(struct wlr_drm_connector *conn
return false;
}
local_buf = drm_surface_blit(&plane->mgpu_surf, source_buf);
local_buf = drm_surface_blit(&plane->mgpu_surf, source_buf,
wait_timeline, wait_point);
if (local_buf == NULL) {
return false;
}
if (plane->mgpu_surf.timeline != NULL) {
state->wait_timeline = wlr_drm_syncobj_timeline_ref(plane->mgpu_surf.timeline);
state->wait_point = plane->mgpu_surf.point;
}
} else {
local_buf = wlr_buffer_lock(source_buf);
if (wait_timeline != NULL) {
state->wait_timeline = wlr_drm_syncobj_timeline_ref(wait_timeline);
state->wait_point = wait_point;
}
}
bool ok = drm_fb_import(&state->primary_fb, drm, local_buf,
@ -1088,7 +1109,7 @@ static bool drm_connector_set_cursor(struct wlr_output *output,
return false;
}
local_buf = drm_surface_blit(&plane->mgpu_surf, buffer);
local_buf = drm_surface_blit(&plane->mgpu_surf, buffer, NULL, 0);
if (local_buf == NULL) {
return false;
}
@ -1625,9 +1646,11 @@ static bool connect_drm_connector(struct wlr_drm_connector *wlr_conn,
output->non_desktop = non_desktop;
}
// TODO: support sync timelines in multi-GPU mode
// TODO: support sync timelines with libliftoff
output->timeline = drm->parent == NULL && drm->iface == &atomic_iface;
output->timeline = drm->iface == &atomic_iface;
if (drm->parent) {
output->timeline = output->timeline && drm->mgpu_renderer.wlr_rend->features.timeline;
}
memset(wlr_conn->max_bpc_bounds, 0, sizeof(wlr_conn->max_bpc_bounds));
if (wlr_conn->props.max_bpc != 0) {