diff options
| -rw-r--r-- | render/wlr_renderer.c | 69 |
1 files changed, 68 insertions, 1 deletions
diff --git a/render/wlr_renderer.c b/render/wlr_renderer.c index 8a1f1e94..6667a819 100644 --- a/render/wlr_renderer.c +++ b/render/wlr_renderer.c @@ -1,6 +1,9 @@ +#define _POSIX_C_SOURCE 200809L #include <assert.h> +#include <fcntl.h> #include <stdbool.h> #include <stdlib.h> +#include <unistd.h> #include <wlr/render/interface.h> #include <wlr/render/pixman.h> #include <wlr/render/wlr_renderer.h> @@ -9,6 +12,7 @@ #include <wlr/types/wlr_matrix.h> #include <wlr/util/box.h> #include <wlr/util/log.h> +#include <xf86drm.h> #include <wlr/config.h> @@ -21,6 +25,7 @@ #include <wlr/render/vulkan.h> #endif // WLR_HAS_VULKAN_RENDERER +#include "backend/backend.h" #include "util/signal.h" #include "render/pixel_format.h" #include "render/wlr_renderer.h" @@ -296,10 +301,72 @@ struct wlr_renderer *renderer_autocreate_with_drm_fd(int drm_fd) { return NULL; } +static int open_drm_render_node(void) { + uint32_t flags = 0; + int devices_len = drmGetDevices2(flags, NULL, 0); + if (devices_len < 0) { + wlr_log(WLR_ERROR, "drmGetDevices2 failed: %s", strerror(-devices_len)); + return -1; + } + drmDevice **devices = calloc(devices_len, sizeof(drmDevice *)); + if (devices == NULL) { + wlr_log_errno(WLR_ERROR, "Allocation failed"); + return -1; + } + devices_len = drmGetDevices2(flags, devices, devices_len); + if (devices_len < 0) { + free(devices); + wlr_log(WLR_ERROR, "drmGetDevices2 failed: %s", strerror(-devices_len)); + return -1; + } + + int fd = -1; + for (int i = 0; i < devices_len; i++) { + drmDevice *dev = devices[i]; + if (dev->available_nodes & (1 << DRM_NODE_RENDER)) { + const char *name = dev->nodes[DRM_NODE_RENDER]; + wlr_log(WLR_DEBUG, "Opening DRM render node '%s'", name); + fd = open(name, O_RDWR | O_CLOEXEC); + if (fd < 0) { + wlr_log_errno(WLR_ERROR, "Failed to open '%s'", name); + goto out; + } + break; + } + } + if (fd < 0) { + wlr_log(WLR_ERROR, "Failed to find any DRM render node"); + } + +out: + for (int i = 0; i < devices_len; i++) { + drmFreeDevice(&devices[i]); + } + free(devices); + + return fd; +} + struct wlr_renderer *wlr_renderer_autocreate(struct wlr_backend *backend) { // Note, drm_fd may be negative if unavailable int drm_fd = wlr_backend_get_drm_fd(backend); - return renderer_autocreate_with_drm_fd(drm_fd); + + // If the backend hasn't picked a DRM FD, but accepts DMA-BUFs, pick an + // arbitrary render node + int render_drm_fd = -1; + uint32_t backend_caps = backend_get_buffer_caps(backend); + if (drm_fd < 0 && (backend_caps & WLR_BUFFER_CAP_DMABUF) != 0) { + render_drm_fd = open_drm_render_node(); + drm_fd = render_drm_fd; + } + + struct wlr_renderer *renderer = renderer_autocreate_with_drm_fd(drm_fd); + + if (render_drm_fd >= 0) { + close(render_drm_fd); + } + + return renderer; } int wlr_renderer_get_drm_fd(struct wlr_renderer *r) { |