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#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include "backend/drm/backend.h"
#include "backend/drm/drm.h"
#include "backend/drm/session.h"
#include "backend/drm/udev.h"
#include "common/log.h"
struct wlr_drm_backend *wlr_drm_backend_init(void)
{
struct wlr_drm_backend *backend = calloc(1, sizeof *backend);
if (!backend) {
wlr_log(L_ERROR, "Allocation failed: %s", strerror(errno));
return NULL;
}
backend->event_loop = wl_event_loop_create();
if (!backend->event_loop) {
wlr_log(L_ERROR, "Failed to create event loop");
goto error_backend;
}
if (!wlr_session_start(&backend->session)) {
wlr_log(L_ERROR, "Failed to start session");
goto error_loop;
}
if (!wlr_udev_init(backend)) {
wlr_log(L_ERROR, "Failed to start udev");
goto error_session;
}
backend->fd = wlr_udev_find_gpu(&backend->udev, &backend->session);
if (backend->fd == -1) {
wlr_log(L_ERROR, "Failed to open DRM device");
goto error_udev;
}
if (!wlr_drm_renderer_init(&backend->renderer, backend, backend->fd)) {
wlr_log(L_ERROR, "Failed to initialize renderer");
goto error_fd;
}
wl_signal_init(&backend->signals.display_add);
wl_signal_init(&backend->signals.display_rem);
wl_signal_init(&backend->signals.display_render);
wlr_drm_scan_connectors(backend);
return backend;
error_fd:
wlr_session_release_device(&backend->session, backend->fd);
error_udev:
wlr_udev_free(&backend->udev);
error_session:
wlr_session_end(&backend->session);
error_loop:
wl_event_loop_destroy(backend->event_loop);
error_backend:
free(backend);
return NULL;
}
void wlr_drm_backend_free(struct wlr_drm_backend *backend)
{
if (!backend)
return;
for (size_t i = 0; i < backend->display_len; ++i) {
wlr_drm_display_free(&backend->displays[i], true);
}
wlr_drm_renderer_free(&backend->renderer);
wlr_udev_free(&backend->udev);
wlr_session_release_device(&backend->session, backend->fd);
wlr_session_end(&backend->session);
wl_event_source_remove(backend->event_src.drm);
wl_event_loop_destroy(backend->event_loop);
free(backend->displays);
free(backend);
}
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