diff options
| -rw-r--r-- | src/Makefile.am | 2 | ||||
| -rw-r--r-- | src/drm_fb.c | 157 | ||||
| -rw-r--r-- | src/drm_fb.h | 12 |
3 files changed, 170 insertions, 1 deletions
diff --git a/src/Makefile.am b/src/Makefile.am index 556d193..59ba58c 100644 --- a/src/Makefile.am +++ b/src/Makefile.am @@ -1,5 +1,5 @@ SUBDIRS = modules bin_PROGRAMS = rototiller -rototiller_SOURCES = drmsetup.c drmsetup.h fb.c fb.h fps.c fps.h rototiller.c rototiller.h threads.c threads.h util.c util.h +rototiller_SOURCES = drmsetup.c drmsetup.h drm_fb.c drm_fb.h fb.c fb.h fps.c fps.h rototiller.c rototiller.h threads.c threads.h util.c util.h rototiller_LDADD = @ROTOTILLER_LIBS@ -lm modules/julia/libjulia.a modules/plasma/libplasma.a modules/ray/libray.a modules/roto/libroto.a modules/sparkler/libsparkler.a modules/stars/libstars.a rototiller_CPPFLAGS = @ROTOTILLER_CFLAGS@ diff --git a/src/drm_fb.c b/src/drm_fb.c new file mode 100644 index 0000000..99169de --- /dev/null +++ b/src/drm_fb.c @@ -0,0 +1,157 @@ +#include <fcntl.h> +#include <inttypes.h> +#include <stdlib.h> +#include <sys/types.h> +#include <sys/stat.h> +#include <sys/ioctl.h> +#include <sys/mman.h> +#include <xf86drm.h> +#include <xf86drmMode.h> + +#include "fb.h" +#include "util.h" + + +/* drm fb backend, everything drm-specific in rototiller resides here. */ + +typedef struct drm_fb_t { + int drm_fd; + uint32_t crtc_id; + uint32_t *connectors; + int n_connectors; + drmModeModeInfoPtr mode; +} drm_fb_t; + +typedef struct drm_fb_page_t drm_fb_page_t; + +struct drm_fb_page_t { + uint32_t *mmap; + size_t mmap_size; + uint32_t drm_dumb_handle; + uint32_t drm_fb_id; +}; + + +drm_fb_t * drm_fb_new(int drm_fd, uint32_t crtc_id, uint32_t *connectors, int n_connectors, drmModeModeInfoPtr mode) +{ + drm_fb_t *c; + + c = calloc(1, sizeof(drm_fb_t)); + if (!c) + return NULL; + + c->drm_fd = drm_fd; + c->crtc_id = crtc_id; + c->connectors = connectors; + c->n_connectors = n_connectors; + c->mode = mode; + + return c; +} + + +void drm_fb_free(drm_fb_t *context) +{ + free(context); +} + + +static int drm_fb_acquire(void *context, void *page) +{ + drm_fb_t *c = context; + drm_fb_page_t *p = page; + + return drmModeSetCrtc(c->drm_fd, c->crtc_id, p->drm_fb_id, 0, 0, c->connectors, c->n_connectors, c->mode); +} + + +static void drm_fb_release(void *context) +{ + /* TODO restore the existing mode @ last acquire? */ +} + + +static void * drm_fb_page_alloc(void *context, fb_page_t *res_page) +{ + struct drm_mode_create_dumb create_dumb = { .bpp = 32 }; + struct drm_mode_map_dumb map_dumb = {}; + uint32_t *map, fb_id; + drm_fb_t *c = context; + drm_fb_page_t *p; + + p = calloc(1, sizeof(drm_fb_page_t)); + if (!p) + return NULL; + + create_dumb.width = c->mode->hdisplay; + create_dumb.height = c->mode->vdisplay; + + pexit_if(ioctl(c->drm_fd, DRM_IOCTL_MODE_CREATE_DUMB, &create_dumb) < 0, + "unable to create dumb buffer"); + + map_dumb.handle = create_dumb.handle; + pexit_if(ioctl(c->drm_fd, DRM_IOCTL_MODE_MAP_DUMB, &map_dumb) < 0, + "unable to prepare dumb buffer for mmap"); + pexit_if(!(map = mmap(NULL, create_dumb.size, PROT_READ|PROT_WRITE, MAP_SHARED, c->drm_fd, map_dumb.offset)), + "unable to mmap dumb buffer"); + pexit_if(drmModeAddFB(c->drm_fd, c->mode->hdisplay, c->mode->vdisplay, 24, 32, create_dumb.pitch, create_dumb.handle, &fb_id) < 0, + "unable to add dumb buffer"); + + p->mmap = map; + p->mmap_size = create_dumb.size; + p->drm_dumb_handle = map_dumb.handle; + p->drm_fb_id = fb_id; + + res_page->fragment.buf = map; + res_page->fragment.width = c->mode->hdisplay; + res_page->fragment.frame_width = c->mode->hdisplay; + res_page->fragment.height = c->mode->vdisplay; + res_page->fragment.frame_height = c->mode->vdisplay; + res_page->fragment.stride = create_dumb.pitch - (c->mode->hdisplay * 4); + + return p; +} + + +static int drm_fb_page_free(void *context, void *page) +{ + struct drm_mode_destroy_dumb destroy_dumb = {}; + drm_fb_t *c = context; + drm_fb_page_t *p = page; + + drmModeRmFB(c->drm_fd, p->drm_fb_id); + munmap(p->mmap, p->mmap_size); + + destroy_dumb.handle = p->drm_dumb_handle; + ioctl(c->drm_fd, DRM_IOCTL_MODE_DESTROY_DUMB, &destroy_dumb); // XXX: errors? + + free(p); + + return 0; +} + + +static int drm_fb_page_flip(void *context, void *page) +{ + drmEventContext drm_ev_ctx = { + .version = DRM_EVENT_CONTEXT_VERSION, + .vblank_handler = NULL, + .page_flip_handler = NULL + }; + drm_fb_t *c = context; + drm_fb_page_t *p = page; + + if (drmModePageFlip(c->drm_fd, c->crtc_id, p->drm_fb_id, DRM_MODE_PAGE_FLIP_EVENT, NULL) < 0) + return -1; + + return drmHandleEvent(c->drm_fd, &drm_ev_ctx); +} + + +fb_ops_t drm_fb_ops = { + .acquire = drm_fb_acquire, + .release = drm_fb_release, + .page_alloc = drm_fb_page_alloc, + .page_free = drm_fb_page_free, + .page_flip = drm_fb_page_flip +}; diff --git a/src/drm_fb.h b/src/drm_fb.h new file mode 100644 index 0000000..c283362 --- /dev/null +++ b/src/drm_fb.h @@ -0,0 +1,12 @@ +#ifndef _DRM_FB_H +#define _DRM_FB_H + +#include <stdint.h> +#include <xf86drmMode.h> + +typedef struct drm_fb_t drm_fb_t; + +drm_fb_t * drm_fb_new(int drm_fd, uint32_t crtc_id, uint32_t *connectors, int n_connectors, drmModeModeInfoPtr mode); +void drm_fb_free(drm_fb_t *fb); + +#endif |