diff options
| -rw-r--r-- | include/wlr/types/wlr_drm.h | 36 | ||||
| -rw-r--r-- | types/meson.build | 1 | ||||
| -rw-r--r-- | types/wlr_drm.c | 128 |
3 files changed, 165 insertions, 0 deletions
diff --git a/include/wlr/types/wlr_drm.h b/include/wlr/types/wlr_drm.h new file mode 100644 index 00000000..51764928 --- /dev/null +++ b/include/wlr/types/wlr_drm.h @@ -0,0 +1,36 @@ +/* + * This an unstable interface of wlroots. No guarantees are made regarding the + * future consistency of this API. + */ +#ifndef WLR_USE_UNSTABLE +#error "Add -DWLR_USE_UNSTABLE to enable unstable wlroots features" +#endif + +#ifndef WLR_TYPES_WLR_DRM_H +#define WLR_TYPES_WLR_DRM_H + +#include <wayland-server-protocol.h> + +struct wlr_renderer; + +/** + * A stub implementation of Mesa's wl_drm protocol. + * + * It only implements the minimum necessary for modern clients to behave + * properly. In particular, flink handles are left unimplemented. + */ +struct wlr_drm { + struct wl_global *global; + char *node_name; + + struct { + struct wl_signal destroy; + } events; + + struct wl_listener display_destroy; +}; + +struct wlr_drm *wlr_drm_create(struct wl_display *display, + struct wlr_renderer *renderer); + +#endif diff --git a/types/meson.build b/types/meson.build index c8d04609..cf644978 100644 --- a/types/meson.build +++ b/types/meson.build @@ -21,6 +21,7 @@ wlr_files += files( 'wlr_compositor.c', 'wlr_cursor.c', 'wlr_data_control_v1.c', + 'wlr_drm.c', 'wlr_export_dmabuf_v1.c', 'wlr_foreign_toplevel_management_v1.c', 'wlr_fullscreen_shell_v1.c', diff --git a/types/wlr_drm.c b/types/wlr_drm.c new file mode 100644 index 00000000..f37b8060 --- /dev/null +++ b/types/wlr_drm.c @@ -0,0 +1,128 @@ +#define _POSIX_C_SOURCE 200809L +#include <assert.h> +#include <stdlib.h> +#include <unistd.h> +#include <xf86drm.h> +#include <wlr/render/wlr_renderer.h> +#include <wlr/types/wlr_drm.h> +#include <wlr/util/log.h> +#include "drm-protocol.h" +#include "util/signal.h" + +#define WLR_DRM_VERSION 2 + +static void drm_handle_authenticate(struct wl_client *client, + struct wl_resource *resource, uint32_t id) { + // We only use render nodes, which don't need authentication + wl_drm_send_authenticated(resource); +} + +static void drm_handle_create_buffer(struct wl_client *client, + struct wl_resource *resource, uint32_t id, uint32_t name, int32_t width, + int32_t height, uint32_t stride, uint32_t format) { + wl_resource_post_error(resource, WL_DRM_ERROR_INVALID_NAME, + "Flink handles are not supported, use DMA-BUF instead"); +} + +static void drm_handle_create_planar_buffer(struct wl_client *client, + struct wl_resource *resource, uint32_t id, uint32_t name, int32_t width, + int32_t height, uint32_t format, int32_t offset0, int32_t stride0, + int32_t offset1, int32_t stride1, int32_t offset2, int32_t stride2) { + wl_resource_post_error(resource, WL_DRM_ERROR_INVALID_NAME, + "Flink handles are not supported, use DMA-BUF instead"); +} + +static void drm_handle_create_prime_buffer(struct wl_client *client, + struct wl_resource *resource, uint32_t id, int fd, int32_t width, + int32_t height, uint32_t format, int32_t offset0, int32_t stride0, + int32_t offset1, int32_t stride1, int32_t offset2, int32_t stride2) { + close(fd); + wl_resource_post_error(resource, WL_DRM_ERROR_INVALID_NAME, + "DMA-BUF imports via wl_drm are not supported, use linux-dmabuf instead"); +} + +static const struct wl_drm_interface drm_impl = { + .authenticate = drm_handle_authenticate, + .create_buffer = drm_handle_create_buffer, + .create_planar_buffer = drm_handle_create_planar_buffer, + .create_prime_buffer = drm_handle_create_prime_buffer, +}; + +static void drm_bind(struct wl_client *client, void *data, + uint32_t version, uint32_t id) { + struct wlr_drm *drm = data; + + struct wl_resource *resource = wl_resource_create(client, + &wl_drm_interface, version, id); + if (resource == NULL) { + wl_client_post_no_memory(client); + return; + } + wl_resource_set_implementation(resource, &drm_impl, drm, NULL); + + wl_drm_send_device(resource, drm->node_name); + wl_drm_send_capabilities(resource, WL_DRM_CAPABILITY_PRIME); +} + +static void handle_display_destroy(struct wl_listener *listener, void *data) { + struct wlr_drm *drm = wl_container_of(listener, drm, display_destroy); + + wlr_signal_emit_safe(&drm->events.destroy, NULL); + + wl_list_remove(&drm->display_destroy.link); + + free(drm->node_name); + wl_global_destroy(drm->global); + free(drm); +} + +struct wlr_drm *wlr_drm_create(struct wl_display *display, + struct wlr_renderer *renderer) { + int drm_fd = wlr_renderer_get_drm_fd(renderer); + if (drm_fd < 0) { + wlr_log(WLR_ERROR, "Failed to get DRM FD from renderer"); + return NULL; + } + + drmDevice *dev = NULL; + if (drmGetDevice2(drm_fd, 0, &dev) != 0) { + wlr_log(WLR_ERROR, "drmGetDevice2 failed"); + return NULL; + } + + char *node_name = NULL; + if (dev->available_nodes & (1 << DRM_NODE_RENDER)) { + node_name = strdup(dev->nodes[DRM_NODE_RENDER]); + } else { + assert(dev->available_nodes & (1 << DRM_NODE_PRIMARY)); + wlr_log(WLR_DEBUG, "No DRM render node available, " + "falling back to primary node '%s'", dev->nodes[DRM_NODE_PRIMARY]); + node_name = strdup(dev->nodes[DRM_NODE_PRIMARY]); + } + drmFreeDevice(&dev); + if (node_name == NULL) { + return NULL; + } + + struct wlr_drm *drm = calloc(1, sizeof(*drm)); + if (drm == NULL) { + free(node_name); + return NULL; + } + + drm->node_name = node_name; + wl_signal_init(&drm->events.destroy); + + drm->global = wl_global_create(display, &wl_drm_interface, WLR_DRM_VERSION, + drm, drm_bind); + if (drm->global == NULL) { + free(drm->node_name); + free(drm); + return NULL; + } + + drm->display_destroy.notify = handle_display_destroy; + wl_display_add_destroy_listener(display, &drm->display_destroy); + + return drm; +} |