/* RetroArch - A frontend for libretro. * Copyright (C) 2010-2013 - Hans-Kristian Arntzen * Copyright (C) 2011-2013 - Daniel De Matteis * * RetroArch is free software: you can redistribute it and/or modify it under the terms * of the GNU General Public License as published by the Free Software Found- * ation, either version 3 of the License, or (at your option) any later version. * * RetroArch is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR * PURPOSE. See the GNU General Public License for more details. * * You should have received a copy of the GNU General Public License along with RetroArch. * If not, see . */ // KMS/DRM context, running without any window manager. // Based on kmscube example by Rob Clark. #include "../../driver.h" #include "../gfx_context.h" #include "../gl_common.h" #include "../gfx_common.h" #ifdef HAVE_CONFIG_H #include "../../config.h" #endif #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include static EGLContext g_egl_ctx; static EGLSurface g_egl_surf; static EGLDisplay g_egl_dpy; static EGLConfig g_config; static volatile sig_atomic_t g_quit; static bool g_inited; static unsigned g_interval; static enum gfx_ctx_api g_api; static struct gbm_device *g_gbm_dev; static struct gbm_surface *g_gbm_surface; static int g_drm_fd; static drmModeModeInfo *g_drm_mode; static uint32_t g_crtc_id; static uint32_t g_connector_id; static drmModeCrtcPtr g_orig_crtc; static unsigned g_fb_width; // Just use something for now. static unsigned g_fb_height; static struct gbm_bo *g_bo, *g_next_bo; static drmModeRes *g_resources; static drmModeConnector *g_connector; static drmModeEncoder *g_encoder; struct drm_fb { struct gbm_bo *bo; uint32_t fb_id; }; static struct drm_fb *drm_fb_get_from_bo(struct gbm_bo *bo); static void gfx_ctx_destroy(void); static void sighandler(int sig) { (void)sig; g_quit = 1; } static void gfx_ctx_swap_interval(unsigned interval) { g_interval = interval; } static void gfx_ctx_check_window(bool *quit, bool *resize, unsigned *width, unsigned *height, unsigned frame_count) { (void)frame_count; (void)width; (void)height; *resize = false; *quit = g_quit; } static unsigned first_page_flip; static unsigned last_page_flip; static uint64_t first_usec; static uint64_t last_usec; static uint64_t flip_request_usec; static unsigned missed_vblanks; static unsigned hit_vblanks; static void page_flip_handler(int fd, unsigned frame, unsigned sec, unsigned usec, void *data) { (void)fd; uint64_t current_usec = (uint64_t)sec * 1000000 + usec; if (!first_page_flip) { first_page_flip = frame; first_usec = current_usec; } if (last_page_flip) { unsigned missed = frame - last_page_flip - 1; if (!missed) hit_vblanks++; else { RARCH_LOG("[KMS/EGL]: Missed %u VBlank(s) (Frame: %u, DRM frame: %u).\n", missed, frame - first_page_flip, frame); missed_vblanks += missed; unsigned flip_time = current_usec - flip_request_usec; RARCH_LOG("\tDelta request => flip: %.5f ms.\n", flip_time / 1000.0); } } last_page_flip = frame; last_usec = current_usec; *(bool*)data = false; } static bool waiting_for_flip; static void wait_flip(bool block) { struct pollfd fds = {0}; fds.fd = g_drm_fd; fds.events = POLLIN; drmEventContext evctx = {0}; evctx.version = DRM_EVENT_CONTEXT_VERSION; evctx.page_flip_handler = page_flip_handler; int timeout = block ? -1 : 0; while (waiting_for_flip) { fds.revents = 0; if (poll(&fds, 1, timeout) < 0) break; if (fds.revents & (POLLHUP | POLLERR)) break; if (fds.revents & POLLIN) drmHandleEvent(g_drm_fd, &evctx); else break; } if (!waiting_for_flip) // Page flip has taken place. { gbm_surface_release_buffer(g_gbm_surface, g_bo); // This buffer is not on-screen anymore. Release it to GBM. g_bo = g_next_bo; // This buffer is being shown now. } } static void queue_flip(void) { g_next_bo = gbm_surface_lock_front_buffer(g_gbm_surface); struct drm_fb *fb = drm_fb_get_from_bo(g_next_bo); int ret = drmModePageFlip(g_drm_fd, g_crtc_id, fb->fb_id, DRM_MODE_PAGE_FLIP_EVENT, &waiting_for_flip); if (ret < 0) { RARCH_ERR("[KMS/EGL]: Failed to queue page flip.\n"); return; } struct timeval tv; gettimeofday(&tv, NULL); flip_request_usec = (uint64_t)tv.tv_sec * 1000000 + tv.tv_usec; waiting_for_flip = true; } static void gfx_ctx_swap_buffers(void) { eglSwapBuffers(g_egl_dpy, g_egl_surf); // I guess we have to wait for flip to have taken place before another flip can be queued up. if (waiting_for_flip) { wait_flip(g_interval); if (waiting_for_flip) // We are still waiting for a flip (nonblocking mode, just drop the frame). return; } queue_flip(); // We have to wait for this flip to finish. This shouldn't happen as we have triple buffered page-flips. if (!gbm_surface_has_free_buffers(g_gbm_surface)) { RARCH_WARN("[KMS/EGL]: Triple buffering is not working correctly ...\n"); wait_flip(true); } } static void gfx_ctx_set_resize(unsigned width, unsigned height) { (void)width; (void)height; } static void gfx_ctx_update_window_title(bool reset) { (void)reset; } static void gfx_ctx_get_video_size(unsigned *width, unsigned *height) { *width = g_fb_width; *height = g_fb_height; } static bool gfx_ctx_init(void) { if (g_inited) return false; g_drm_fd = open("/dev/dri/card0", O_RDWR); if (g_drm_fd < 0) { RARCH_ERR("[KMS/EGL]: Couldn't open DRM device.\n"); goto error; } g_resources = drmModeGetResources(g_drm_fd); if (!g_resources) { RARCH_ERR("[KMS/EGL]: Couldn't get device resources.\n"); goto error; } for (int i = 0; i < g_resources->count_connectors; i++) { g_connector = drmModeGetConnector(g_drm_fd, g_resources->connectors[i]); if (!g_connector) continue; if (g_connector->connection == DRM_MODE_CONNECTED && g_connector->count_modes > 0) break; drmModeFreeConnector(g_connector); g_connector = NULL; } if (!g_connector) { RARCH_ERR("[KMS/EGL]: Couldn't get device connector.\n"); goto error; } for (int i = 0; i < g_resources->count_encoders; i++) { g_encoder = drmModeGetEncoder(g_drm_fd, g_resources->encoders[i]); if (!g_encoder) continue; if (g_encoder->encoder_id == g_connector->encoder_id) break; drmModeFreeEncoder(g_encoder); g_encoder = NULL; } if (!g_encoder) { RARCH_ERR("[KMS/EGL]: Couldn't find DRM encoder.\n"); goto error; } g_drm_mode = &g_connector->modes[0]; g_crtc_id = g_encoder->crtc_id; g_orig_crtc = drmModeGetCrtc(g_drm_fd, g_crtc_id); if (!g_orig_crtc) RARCH_WARN("[KMS/EGL]: Cannot find original CRTC.\n"); g_connector_id = g_connector->connector_id; g_fb_width = g_drm_mode->hdisplay; g_fb_height = g_drm_mode->vdisplay; g_gbm_dev = gbm_create_device(g_drm_fd); g_gbm_surface = gbm_surface_create(g_gbm_dev, g_fb_width, g_fb_height, GBM_FORMAT_XRGB8888, GBM_BO_USE_SCANOUT | GBM_BO_USE_RENDERING); if (!g_gbm_surface) { RARCH_ERR("[KMS/EGL]: Couldn't create GBM surface.\n"); goto error; } return true; error: gfx_ctx_destroy(); return false; } static void drm_fb_destroy_callback(struct gbm_bo *bo, void *data) { struct drm_fb *fb = (struct drm_fb*)data; if (fb->fb_id) drmModeRmFB(g_drm_fd, fb->fb_id); free(fb); } static struct drm_fb *drm_fb_get_from_bo(struct gbm_bo *bo) { struct drm_fb *fb = (struct drm_fb*)gbm_bo_get_user_data(bo); if (fb) return fb; fb = (struct drm_fb*)calloc(1, sizeof(*fb)); fb->bo = bo; unsigned width = gbm_bo_get_width(bo); unsigned height = gbm_bo_get_height(bo); unsigned stride = gbm_bo_get_stride(bo); unsigned handle = gbm_bo_get_handle(bo).u32; RARCH_LOG("[KMS/EGL]: New FB: %ux%u (stride: %u).\n", width, height, stride); int ret = drmModeAddFB(g_drm_fd, width, height, 24, 32, stride, handle, &fb->fb_id); if (ret < 0) { RARCH_ERR("[KMS/EGL]: Failed to create FB: %s\n", strerror(errno)); free(fb); return NULL; } gbm_bo_set_user_data(bo, fb, drm_fb_destroy_callback); return fb; } static bool gfx_ctx_set_video_mode( unsigned width, unsigned height, bool fullscreen) { if (g_inited) return false; int ret = 0; struct drm_fb *fb = NULL; struct sigaction sa = {{0}}; sa.sa_handler = sighandler; sa.sa_flags = SA_RESTART; sigemptyset(&sa.sa_mask); sigaction(SIGINT, &sa, NULL); sigaction(SIGTERM, &sa, NULL); #define EGL_ATTRIBS_BASE \ EGL_SURFACE_TYPE, EGL_WINDOW_BIT, \ EGL_RED_SIZE, 1, \ EGL_GREEN_SIZE, 1, \ EGL_BLUE_SIZE, 1, \ EGL_ALPHA_SIZE, 0, \ EGL_DEPTH_SIZE, 0 static const EGLint egl_attribs_gl[] = { EGL_ATTRIBS_BASE, EGL_RENDERABLE_TYPE, EGL_OPENGL_BIT, EGL_NONE, }; static const EGLint egl_attribs_gles[] = { EGL_ATTRIBS_BASE, EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT, EGL_NONE, }; static const EGLint egl_attribs_vg[] = { EGL_ATTRIBS_BASE, EGL_RENDERABLE_TYPE, EGL_OPENVG_BIT, EGL_NONE, }; // GLES 2.0. Don't use for any other API. static const EGLint gles_context_attribs[] = { EGL_CONTEXT_CLIENT_VERSION, 2, EGL_NONE }; const EGLint *attrib_ptr; switch (g_api) { case GFX_CTX_OPENGL_API: attrib_ptr = egl_attribs_gl; break; case GFX_CTX_OPENGL_ES_API: attrib_ptr = egl_attribs_gles; break; case GFX_CTX_OPENVG_API: attrib_ptr = egl_attribs_vg; break; default: attrib_ptr = NULL; } g_egl_dpy = eglGetDisplay((EGLNativeDisplayType)g_gbm_dev); if (!g_egl_dpy) { RARCH_ERR("[KMS/EGL]: Couldn't get EGL display.\n"); goto error; } EGLint major, minor; if (!eglInitialize(g_egl_dpy, &major, &minor)) goto error; EGLint n; if (!eglChooseConfig(g_egl_dpy, attrib_ptr, &g_config, 1, &n) || n != 1) goto error; g_egl_ctx = eglCreateContext(g_egl_dpy, g_config, EGL_NO_CONTEXT, (g_api == GFX_CTX_OPENGL_ES_API) ? gles_context_attribs : NULL); if (!g_egl_ctx) goto error; g_egl_surf = eglCreateWindowSurface(g_egl_dpy, g_config, (EGLNativeWindowType)g_gbm_surface, NULL); if (!g_egl_surf) goto error; if (!eglMakeCurrent(g_egl_dpy, g_egl_surf, g_egl_surf, g_egl_ctx)) goto error; glClear(GL_COLOR_BUFFER_BIT); eglSwapBuffers(g_egl_dpy, g_egl_surf); g_bo = gbm_surface_lock_front_buffer(g_gbm_surface); fb = drm_fb_get_from_bo(g_bo); ret = drmModeSetCrtc(g_drm_fd, g_crtc_id, fb->fb_id, 0, 0, &g_connector_id, 1, g_drm_mode); if (ret < 0) goto error; g_inited = true; return true; error: gfx_ctx_destroy(); return false; } void gfx_ctx_destroy(void) { // Make sure we acknowledge all page-flips. if (waiting_for_flip) wait_flip(true); if (g_egl_dpy) { if (g_egl_ctx) { eglMakeCurrent(g_egl_dpy, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT); eglDestroyContext(g_egl_dpy, g_egl_ctx); } if (g_egl_surf) eglDestroySurface(g_egl_dpy, g_egl_surf); eglTerminate(g_egl_dpy); } // Be as careful as possible in deinit. // If we screw up, the KMS tty will not restore. g_egl_ctx = NULL; g_egl_surf = NULL; g_egl_dpy = NULL; g_config = 0; // Restore original CRTC. if (g_orig_crtc) { drmModeSetCrtc(g_drm_fd, g_orig_crtc->crtc_id, g_orig_crtc->buffer_id, g_orig_crtc->x, g_orig_crtc->y, &g_connector_id, 1, &g_orig_crtc->mode); drmModeFreeCrtc(g_orig_crtc); } if (g_gbm_surface) gbm_surface_destroy(g_gbm_surface); if (g_gbm_dev) gbm_device_destroy(g_gbm_dev); if (g_encoder) drmModeFreeEncoder(g_encoder); if (g_connector) drmModeFreeConnector(g_connector); if (g_resources) drmModeFreeResources(g_resources); g_gbm_surface = NULL; g_gbm_dev = NULL; g_encoder = NULL; g_connector = NULL; g_resources = NULL; g_orig_crtc = NULL; g_drm_mode = NULL; g_quit = 0; g_crtc_id = 0; g_connector_id = 0; g_fb_width = 0; g_fb_height = 0; g_bo = NULL; g_next_bo = NULL; if (g_drm_fd >= 0) close(g_drm_fd); g_drm_fd = -1; unsigned frames = last_page_flip - first_page_flip; if (frames) { uint64_t usec = last_usec - first_usec; RARCH_WARN("[KMS/EGL]: Estimated monitor FPS: %.5f Hz\n", 1000000.0 * frames / usec); } RARCH_WARN("[KMS/EGL]: Performance stats: Missed VBlanks: %u, Perfect VBlanks: %u\n", missed_vblanks, hit_vblanks); g_inited = false; } static void gfx_ctx_input_driver(const input_driver_t **input, void **input_data) { void *linuxinput = input_linuxraw.init(); *input = linuxinput ? &input_linuxraw : NULL; *input_data = linuxinput; } static bool gfx_ctx_has_focus(void) { return g_inited; } static gfx_ctx_proc_t gfx_ctx_get_proc_address(const char *symbol) { return eglGetProcAddress(symbol); } static bool gfx_ctx_bind_api(enum gfx_ctx_api api) { g_api = api; switch (api) { case GFX_CTX_OPENGL_API: return eglBindAPI(EGL_OPENGL_API); case GFX_CTX_OPENGL_ES_API: return eglBindAPI(EGL_OPENGL_ES_API); case GFX_CTX_OPENVG_API: return eglBindAPI(EGL_OPENVG_API); default: return false; } } static bool gfx_ctx_init_egl_image_buffer(const video_info_t *video) { return false; } static bool gfx_ctx_write_egl_image(const void *frame, unsigned width, unsigned height, unsigned pitch, bool rgb32, unsigned index, void **image_handle) { return false; } const gfx_ctx_driver_t gfx_ctx_drm_egl = { gfx_ctx_init, gfx_ctx_destroy, gfx_ctx_bind_api, gfx_ctx_swap_interval, gfx_ctx_set_video_mode, gfx_ctx_get_video_size, NULL, gfx_ctx_update_window_title, gfx_ctx_check_window, gfx_ctx_set_resize, gfx_ctx_has_focus, gfx_ctx_swap_buffers, gfx_ctx_input_driver, gfx_ctx_get_proc_address, gfx_ctx_init_egl_image_buffer, gfx_ctx_write_egl_image, NULL, "kms-egl", };