backend: support creating DRM and libinput via WLR_BACKENDS
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@ -118,7 +118,33 @@ static struct wlr_backend *attempt_headless_backend(
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return backend;
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}
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static struct wlr_backend *attempt_drm_backend(struct wl_display *display,
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struct wlr_backend *backend, struct wlr_session *session) {
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int gpus[8];
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size_t num_gpus = wlr_session_find_gpus(session, 8, gpus);
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struct wlr_backend *primary_drm = NULL;
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wlr_log(L_INFO, "Found %zu GPUs", num_gpus);
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for (size_t i = 0; i < num_gpus; ++i) {
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struct wlr_backend *drm = wlr_drm_backend_create(display, session,
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gpus[i], primary_drm);
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if (!drm) {
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wlr_log(L_ERROR, "Failed to open DRM device %d", gpus[i]);
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continue;
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}
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if (!primary_drm) {
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primary_drm = drm;
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}
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wlr_multi_backend_add(backend, drm);
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}
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return primary_drm;
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}
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static struct wlr_backend *attempt_backend_by_name(struct wl_display *display,
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struct wlr_backend *backend, struct wlr_session **session,
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const char *name) {
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if (strcmp(name, "wayland") == 0) {
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return attempt_wl_backend(display);
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@ -128,7 +154,22 @@ static struct wlr_backend *attempt_backend_by_name(struct wl_display *display,
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#endif
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} else if (strcmp(name, "headless") == 0) {
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return attempt_headless_backend(display);
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} else if (strcmp(name, "drm") == 0 || strcmp(name, "libinput") == 0) {
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// DRM and libinput need a session
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*session = wlr_session_create(display);
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if (!*session) {
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wlr_log(L_ERROR, "failed to start a session");
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return NULL;
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}
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if (strcmp(name, "libinput") == 0) {
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return wlr_libinput_backend_create(display, *session);
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} else {
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return attempt_drm_backend(display, backend, *session);
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}
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}
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wlr_log(L_ERROR, "unrecognized backend '%s'", name);
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return NULL;
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}
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@ -139,11 +180,14 @@ struct wlr_backend *wlr_backend_autocreate(struct wl_display *display) {
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return NULL;
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}
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struct wlr_session *session = NULL;
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char *names = getenv("WLR_BACKENDS");
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if (names) {
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names = strdup(names);
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if (names == NULL) {
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wlr_log(L_ERROR, "allocation failed");
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wlr_backend_destroy(backend);
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return NULL;
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}
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@ -151,13 +195,18 @@ struct wlr_backend *wlr_backend_autocreate(struct wl_display *display) {
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char *name = strtok_r(names, ",", &saveptr);
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while (name != NULL) {
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struct wlr_backend *subbackend =
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attempt_backend_by_name(display, name);
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attempt_backend_by_name(display, backend, &session, name);
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if (subbackend == NULL) {
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wlr_log(L_ERROR, "unrecognized backend '%s'", name);
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wlr_log(L_ERROR, "failed to start backend '%s'", name);
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wlr_backend_destroy(backend);
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wlr_session_destroy(session);
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return NULL;
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}
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if (!wlr_multi_backend_add(backend, subbackend)) {
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wlr_log(L_ERROR, "failed to add backend '%s'", name);
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wlr_backend_destroy(backend);
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wlr_session_destroy(session);
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return NULL;
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}
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@ -189,7 +238,7 @@ struct wlr_backend *wlr_backend_autocreate(struct wl_display *display) {
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#endif
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// Attempt DRM+libinput
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struct wlr_session *session = wlr_session_create(display);
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session = wlr_session_create(display);
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if (!session) {
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wlr_log(L_ERROR, "Failed to start a DRM session");
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wlr_backend_destroy(backend);
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@ -197,40 +246,21 @@ struct wlr_backend *wlr_backend_autocreate(struct wl_display *display) {
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}
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struct wlr_backend *libinput = wlr_libinput_backend_create(display, session);
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if (libinput) {
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wlr_multi_backend_add(backend, libinput);
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} else {
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if (!libinput) {
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wlr_log(L_ERROR, "Failed to start libinput backend");
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wlr_backend_destroy(backend);
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wlr_session_destroy(session);
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return NULL;
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}
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wlr_multi_backend_add(backend, libinput);
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int gpus[8];
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size_t num_gpus = wlr_session_find_gpus(session, 8, gpus);
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struct wlr_backend *primary_drm = NULL;
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wlr_log(L_INFO, "Found %zu GPUs", num_gpus);
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for (size_t i = 0; i < num_gpus; ++i) {
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struct wlr_backend *drm = wlr_drm_backend_create(display, session,
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gpus[i], primary_drm);
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if (!drm) {
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wlr_log(L_ERROR, "Failed to open DRM device");
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continue;
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}
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if (!primary_drm) {
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primary_drm = drm;
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}
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wlr_multi_backend_add(backend, drm);
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}
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struct wlr_backend *primary_drm =
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attempt_drm_backend(display, backend, session);
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if (!primary_drm) {
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wlr_log(L_ERROR, "Failed to open any DRM device");
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wlr_backend_destroy(libinput);
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wlr_session_destroy(session);
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wlr_backend_destroy(backend);
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wlr_session_destroy(session);
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return NULL;
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}
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