129 lines
3.9 KiB
C
129 lines
3.9 KiB
C
#define _POSIX_C_SOURCE 200809L
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#include <assert.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <xf86drm.h>
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#include <wlr/render/wlr_renderer.h>
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#include <wlr/types/wlr_drm.h>
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#include <wlr/util/log.h>
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#include "drm-protocol.h"
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#include "util/signal.h"
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#define WLR_DRM_VERSION 2
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static void drm_handle_authenticate(struct wl_client *client,
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struct wl_resource *resource, uint32_t id) {
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// We only use render nodes, which don't need authentication
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wl_drm_send_authenticated(resource);
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}
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static void drm_handle_create_buffer(struct wl_client *client,
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struct wl_resource *resource, uint32_t id, uint32_t name, int32_t width,
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int32_t height, uint32_t stride, uint32_t format) {
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wl_resource_post_error(resource, WL_DRM_ERROR_INVALID_NAME,
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"Flink handles are not supported, use DMA-BUF instead");
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}
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static void drm_handle_create_planar_buffer(struct wl_client *client,
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struct wl_resource *resource, uint32_t id, uint32_t name, int32_t width,
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int32_t height, uint32_t format, int32_t offset0, int32_t stride0,
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int32_t offset1, int32_t stride1, int32_t offset2, int32_t stride2) {
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wl_resource_post_error(resource, WL_DRM_ERROR_INVALID_NAME,
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"Flink handles are not supported, use DMA-BUF instead");
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}
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static void drm_handle_create_prime_buffer(struct wl_client *client,
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struct wl_resource *resource, uint32_t id, int fd, int32_t width,
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int32_t height, uint32_t format, int32_t offset0, int32_t stride0,
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int32_t offset1, int32_t stride1, int32_t offset2, int32_t stride2) {
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close(fd);
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wl_resource_post_error(resource, WL_DRM_ERROR_INVALID_NAME,
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"DMA-BUF imports via wl_drm are not supported, use linux-dmabuf instead");
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}
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static const struct wl_drm_interface drm_impl = {
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.authenticate = drm_handle_authenticate,
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.create_buffer = drm_handle_create_buffer,
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.create_planar_buffer = drm_handle_create_planar_buffer,
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.create_prime_buffer = drm_handle_create_prime_buffer,
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};
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static void drm_bind(struct wl_client *client, void *data,
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uint32_t version, uint32_t id) {
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struct wlr_drm *drm = data;
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struct wl_resource *resource = wl_resource_create(client,
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&wl_drm_interface, version, id);
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if (resource == NULL) {
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wl_client_post_no_memory(client);
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return;
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}
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wl_resource_set_implementation(resource, &drm_impl, drm, NULL);
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wl_drm_send_device(resource, drm->node_name);
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wl_drm_send_capabilities(resource, WL_DRM_CAPABILITY_PRIME);
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}
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static void handle_display_destroy(struct wl_listener *listener, void *data) {
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struct wlr_drm *drm = wl_container_of(listener, drm, display_destroy);
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wlr_signal_emit_safe(&drm->events.destroy, NULL);
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wl_list_remove(&drm->display_destroy.link);
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free(drm->node_name);
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wl_global_destroy(drm->global);
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free(drm);
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}
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struct wlr_drm *wlr_drm_create(struct wl_display *display,
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struct wlr_renderer *renderer) {
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int drm_fd = wlr_renderer_get_drm_fd(renderer);
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if (drm_fd < 0) {
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wlr_log(WLR_ERROR, "Failed to get DRM FD from renderer");
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return NULL;
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}
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drmDevice *dev = NULL;
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if (drmGetDevice2(drm_fd, 0, &dev) != 0) {
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wlr_log(WLR_ERROR, "drmGetDevice2 failed");
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return NULL;
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}
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char *node_name = NULL;
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if (dev->available_nodes & (1 << DRM_NODE_RENDER)) {
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node_name = strdup(dev->nodes[DRM_NODE_RENDER]);
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} else {
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assert(dev->available_nodes & (1 << DRM_NODE_PRIMARY));
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wlr_log(WLR_DEBUG, "No DRM render node available, "
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"falling back to primary node '%s'", dev->nodes[DRM_NODE_PRIMARY]);
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node_name = strdup(dev->nodes[DRM_NODE_PRIMARY]);
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}
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drmFreeDevice(&dev);
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if (node_name == NULL) {
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return NULL;
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}
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struct wlr_drm *drm = calloc(1, sizeof(*drm));
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if (drm == NULL) {
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free(node_name);
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return NULL;
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}
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drm->node_name = node_name;
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wl_signal_init(&drm->events.destroy);
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drm->global = wl_global_create(display, &wl_drm_interface, WLR_DRM_VERSION,
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drm, drm_bind);
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if (drm->global == NULL) {
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free(drm->node_name);
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free(drm);
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return NULL;
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}
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drm->display_destroy.notify = handle_display_destroy;
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wl_display_add_destroy_listener(display, &drm->display_destroy);
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return drm;
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}
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