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backend/drm: Drop parent drm device

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Compositors should instead blit to secondary drm devices themselves.
This commit is contained in:
Alexander Orzechowski 2024-10-13 11:51:41 -04:00
parent 2cca0086fb
commit e319909294
10 changed files with 13 additions and 311 deletions
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68
backend/drm/backend.c
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@ -49,14 +49,9 @@ static void backend_destroy(struct wlr_backend *backend) {
wl_list_remove(&drm->session_destroy.link);
wl_list_remove(&drm->session_active.link);
wl_list_remove(&drm->parent_destroy.link);
wl_list_remove(&drm->dev_change.link);
wl_list_remove(&drm->dev_remove.link);
if (drm->parent) {
finish_drm_renderer(&drm->mgpu_renderer);
}
finish_drm_resources(drm);
struct wlr_drm_fb *fb, *fb_tmp;
@ -104,11 +99,6 @@ bool wlr_backend_is_drm(struct wlr_backend *b) {
return b->impl == &backend_impl;
}
struct wlr_backend *wlr_drm_backend_get_parent(struct wlr_backend *backend) {
struct wlr_drm_backend *drm = get_drm_backend_from_backend(backend);
return drm->parent ? &drm->parent->backend : NULL;
}
static void handle_session_active(struct wl_listener *listener, void *data) {
struct wlr_drm_backend *drm =
wl_container_of(listener, drm, session_active);
@ -159,16 +149,8 @@ static void handle_session_destroy(struct wl_listener *listener, void *data) {
backend_destroy(&drm->backend);
}
static void handle_parent_destroy(struct wl_listener *listener, void *data) {
struct wlr_drm_backend *drm =
wl_container_of(listener, drm, parent_destroy);
backend_destroy(&drm->backend);
}
struct wlr_backend *wlr_drm_backend_create(struct wlr_session *session,
struct wlr_device *dev, struct wlr_backend *parent) {
struct wlr_backend *wlr_drm_backend_create(struct wlr_session *session, struct wlr_device *dev) {
assert(session && dev);
assert(!parent || wlr_backend_is_drm(parent));
char *name = drmGetDeviceNameFromFd2(dev->fd);
if (name == NULL) {
@ -201,15 +183,6 @@ struct wlr_backend *wlr_drm_backend_create(struct wlr_session *session,
drm->fd = dev->fd;
drm->name = name;
if (parent != NULL) {
drm->parent = get_drm_backend_from_backend(parent);
drm->parent_destroy.notify = handle_parent_destroy;
wl_signal_add(&parent->events.destroy, &drm->parent_destroy);
} else {
wl_list_init(&drm->parent_destroy.link);
}
drm->dev_change.notify = handle_dev_change;
wl_signal_add(&dev->events.change, &drm->dev_change);
@ -234,58 +207,19 @@ struct wlr_backend *wlr_drm_backend_create(struct wlr_session *session,
goto error_event;
}
if (drm->parent) {
if (!init_drm_renderer(drm, &drm->mgpu_renderer)) {
wlr_log(WLR_ERROR, "Failed to initialize renderer");
goto error_resources;
}
// We'll perform a multi-GPU copy for all submitted buffers, we need
// to be able to texture from them
struct wlr_renderer *renderer = drm->mgpu_renderer.wlr_rend;
const struct wlr_drm_format_set *texture_formats =
wlr_renderer_get_texture_formats(renderer, WLR_BUFFER_CAP_DMABUF);
if (texture_formats == NULL) {
wlr_log(WLR_ERROR, "Failed to query renderer texture formats");
goto error_mgpu_renderer;
}
// Forbid implicit modifiers, because their meaning changes from one
// GPU to another.
for (size_t i = 0; i < texture_formats->len; i++) {
const struct wlr_drm_format *fmt = &texture_formats->formats[i];
for (size_t j = 0; j < fmt->len; j++) {
uint64_t mod = fmt->modifiers[j];
if (mod == DRM_FORMAT_MOD_INVALID) {
continue;
}
wlr_drm_format_set_add(&drm->mgpu_formats, fmt->format, mod);
}
}
}
drm->backend.features.timeline = drm->iface != &legacy_iface;
if (drm->parent) {
drm->backend.features.timeline = drm->backend.features.timeline &&
drm->mgpu_renderer.wlr_rend->features.timeline;
}
drm->session_destroy.notify = handle_session_destroy;
wl_signal_add(&session->events.destroy, &drm->session_destroy);
return &drm->backend;
error_mgpu_renderer:
finish_drm_renderer(&drm->mgpu_renderer);
error_resources:
finish_drm_resources(drm);
error_event:
wl_list_remove(&drm->session_active.link);
wl_event_source_remove(drm->drm_event);
error_fd:
wl_list_remove(&drm->dev_remove.link);
wl_list_remove(&drm->dev_change.link);
wl_list_remove(&drm->parent_destroy.link);
wlr_session_close_file(drm->session, dev);
free(drm->name);
free(drm);