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#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <wayland-server.h>
#include <wlr/session.h>
#include <wlr/types.h>
#include <wlr/common/list.h>
#include "backend.h"
#include "backend/drm/backend.h"
#include "backend/drm/drm.h"
#include "backend/drm/udev.h"
#include "common/log.h"
static bool wlr_drm_backend_init(struct wlr_backend_state *state) {
wlr_drm_scan_connectors(state);
return true;
}
static void wlr_drm_backend_destroy(struct wlr_backend_state *state) {
if (!state) {
return;
}
for (size_t i = 0; state->outputs && i < state->outputs->length; ++i) {
struct wlr_output_state *output = state->outputs->items[i];
wlr_output_destroy(output->wlr_output);
}
wlr_drm_renderer_free(&state->renderer);
wlr_udev_free(&state->udev);
wlr_session_close_file(state->session, state->fd);
wlr_session_finish(state->session);
wl_event_source_remove(state->drm_event);
free(state);
}
static struct wlr_backend_impl backend_impl = {
.init = wlr_drm_backend_init,
.destroy = wlr_drm_backend_destroy
};
struct wlr_backend *wlr_drm_backend_create(struct wl_display *display,
struct wlr_session *session) {
struct wlr_backend_state *state = calloc(1, sizeof(struct wlr_backend_state));
if (!state) {
wlr_log(L_ERROR, "Allocation failed: %s", strerror(errno));
return NULL;
}
struct wlr_backend *backend = wlr_backend_create(&backend_impl, state);
if (!backend) {
wlr_log(L_ERROR, "Allocation failed: %s", strerror(errno));
return NULL;
}
state->backend = backend;
state->session = session;
state->outputs = list_create();
if (!state->outputs) {
wlr_log(L_ERROR, "Failed to allocate list");
goto error_backend;
}
if (!wlr_udev_init(display, &state->udev)) {
wlr_log(L_ERROR, "Failed to start udev");
goto error_list;
}
state->fd = wlr_udev_find_gpu(&state->udev, state->session);
if (state->fd == -1) {
wlr_log(L_ERROR, "Failed to open DRM device");
goto error_udev;
}
struct wl_event_loop *event_loop = wl_display_get_event_loop(display);
state->drm_event = wl_event_loop_add_fd(event_loop, state->fd,
WL_EVENT_READABLE, wlr_drm_event, NULL);
if (!state->drm_event) {
wlr_log(L_ERROR, "Failed to create DRM event source");
goto error_fd;
}
// TODO: what is the difference between the per-output renderer and this
// one?
if (!wlr_drm_renderer_init(&state->renderer, state->fd)) {
wlr_log(L_ERROR, "Failed to initialize renderer");
goto error_event;
}
return backend;
error_event:
wl_event_source_remove(state->drm_event);
error_fd:
wlr_session_close_file(state->session, state->fd);
error_udev:
wlr_udev_free(&state->udev);
error_list:
list_free(state->outputs);
error_backend:
free(state);
free(backend);
return NULL;
}
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