152 lines
4.0 KiB
C
152 lines
4.0 KiB
C
#include <unistd.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <errno.h>
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#include <assert.h>
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#include <wayland-server.h>
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#include <xf86drm.h>
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#include <sys/stat.h>
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#include <wlr/session.h>
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#include <wlr/types.h>
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#include <wlr/common/list.h>
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#include <wlr/backend/interface.h>
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#include "backend/udev.h"
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#include "backend/drm.h"
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#include "common/log.h"
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static bool wlr_drm_backend_init(struct wlr_backend_state *state) {
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wlr_drm_scan_connectors(state);
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return true;
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}
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static void wlr_drm_backend_destroy(struct wlr_backend_state *state) {
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if (!state) {
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return;
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}
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for (size_t i = 0; state->outputs && i < state->outputs->length; ++i) {
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struct wlr_output_state *output = state->outputs->items[i];
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wlr_output_destroy(output->wlr_output);
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}
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wlr_udev_signal_remove(state->udev, &state->drm_invalidated);
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wlr_drm_renderer_free(&state->renderer);
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wlr_session_close_file(state->session, state->fd);
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wl_event_source_remove(state->drm_event);
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free(state);
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}
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static struct wlr_backend_impl backend_impl = {
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.init = wlr_drm_backend_init,
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.destroy = wlr_drm_backend_destroy
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};
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static void session_signal(struct wl_listener *listener, void *data) {
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struct wlr_backend_state *drm = wl_container_of(listener, drm, session_signal);
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struct wlr_session *session = data;
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if (session->active) {
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wlr_log(L_INFO, "DRM fd resumed");
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for (size_t i = 0; i < drm->outputs->length; ++i) {
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struct wlr_output_state *output = drm->outputs->items[i];
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wlr_drm_output_start_renderer(output);
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}
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} else {
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wlr_log(L_INFO, "DRM fd paused");
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for (size_t i = 0; i < drm->outputs->length; ++i) {
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struct wlr_output_state *output = drm->outputs->items[i];
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wlr_drm_output_pause_renderer(output);
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}
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}
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}
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static void drm_invalidated(struct wl_listener *listener, void *data) {
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struct wlr_backend_state *drm = wl_container_of(listener, drm, drm_invalidated);
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struct wlr_udev *udev = data;
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(void)udev;
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char *name = drmGetDeviceNameFromFd2(drm->fd);
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wlr_log(L_DEBUG, "%s invalidated", name);
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free(name);
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wlr_drm_scan_connectors(drm);
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}
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struct wlr_backend *wlr_drm_backend_create(struct wl_display *display,
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struct wlr_session *session, struct wlr_udev *udev, int gpu_fd) {
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assert(display && session && gpu_fd > 0);
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char *name = drmGetDeviceNameFromFd2(gpu_fd);
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drmVersion *version = drmGetVersion(gpu_fd);
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wlr_log(L_INFO, "Initalizing DRM backend for %s (%s)", name, version->name);
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free(name);
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drmFreeVersion(version);
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struct wlr_backend_state *state = calloc(1, sizeof(struct wlr_backend_state));
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if (!state) {
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wlr_log(L_ERROR, "Allocation failed: %s", strerror(errno));
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return NULL;
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}
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struct wlr_backend *backend = wlr_backend_create(&backend_impl, state);
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if (!backend) {
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wlr_log(L_ERROR, "Allocation failed: %s", strerror(errno));
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return NULL;
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}
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state->backend = backend;
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state->session = session;
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state->udev = udev;
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state->outputs = list_create();
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if (!state->outputs) {
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wlr_log(L_ERROR, "Failed to allocate list");
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goto error_backend;
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}
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state->fd = gpu_fd;
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struct stat st;
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if (fstat(state->fd, &st) < 0) {
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wlr_log(L_ERROR, "Stat failed: %s", strerror(errno));
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}
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state->dev = st.st_rdev;
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state->drm_invalidated.notify = drm_invalidated;
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wlr_udev_signal_add(udev, state->dev, &state->drm_invalidated);
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struct wl_event_loop *event_loop = wl_display_get_event_loop(display);
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state->drm_event = wl_event_loop_add_fd(event_loop, state->fd,
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WL_EVENT_READABLE, wlr_drm_event, NULL);
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if (!state->drm_event) {
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wlr_log(L_ERROR, "Failed to create DRM event source");
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goto error_fd;
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}
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state->session_signal.notify = session_signal;
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wl_signal_add(&session->session_signal, &state->session_signal);
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// TODO: what is the difference between the per-output renderer and this
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// one?
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if (!wlr_drm_renderer_init(&state->renderer, state->fd)) {
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wlr_log(L_ERROR, "Failed to initialize renderer");
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goto error_event;
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}
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return backend;
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error_event:
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wl_event_source_remove(state->drm_event);
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error_fd:
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wlr_session_close_file(state->session, state->fd);
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list_free(state->outputs);
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error_backend:
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free(state);
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free(backend);
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return NULL;
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}
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