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Diffstat (limited to 'v4l2-mfc-example/drm.c')
| -rw-r--r-- | v4l2-mfc-example/drm.c | 164 |
1 files changed, 164 insertions, 0 deletions
diff --git a/v4l2-mfc-example/drm.c b/v4l2-mfc-example/drm.c new file mode 100644 index 0000000..188d394 --- /dev/null +++ b/v4l2-mfc-example/drm.c @@ -0,0 +1,164 @@ +/* + * V4L2 Codec decoding example application + * Kamil Debski <k.debski@samsung.com> + * + * DRM operations + * + * Copyright 2014 Samsung Electronics Co., Ltd. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + */ + +#include <fcntl.h> +#include <sys/ioctl.h> +#include <sys/mman.h> +#include <sys/stat.h> +#include <sys/types.h> +#include <unistd.h> + +#include "common.h" +#include "drm.h" +#include <string.h> + +#ifdef DRM + +#include <xf86drm.h> +#include <xf86drmMode.h> +#include <exynos_drm.h> + +int drm_open(struct instance *i, char *name) +{ + char mode[32]; + drmModeCrtc *crtc; + struct drm_gem_close args; + drmModeConnector *connector; + drmModeModeInfo *mode_drm; + unsigned int fb_id; + int ret; + int n; + + i->drm.fd =drmOpen(name, NULL); + if (i->drm.fd < 0) { + err("Failed to open drm module \"%s\"", name); + return -1; + } + + i->drm.resources = drmModeGetResources(i->drm.fd); + + crtc = drmModeGetCrtc(i->drm.fd, i->drm.crtc_id); + if (!crtc) { + err("Failed to get crtc: %d", i->drm.crtc_id); + return -1; + } + + i->drm.width = crtc->width; + i->drm.height = crtc->height; + + dbg("DRM crtc (%d) resolution: %dx%d @", i->drm.crtc_id, i->drm.width, + i->drm.height); + drmModeFreeCrtc(crtc); + + for (n = 0; n < (i->fimc.double_buf?2:1); n++) { + i->drm.gem[n].size = i->drm.width * i->drm.height * 4; + ret = ioctl(i->drm.fd, DRM_IOCTL_EXYNOS_GEM_CREATE, + &i->drm.gem[n]); + if (ret < 0) { + err("Failed to create gem"); + return -1; + } + args.handle = i->drm.gem[n].handle; + i->drm.mmap[n].handle = i->drm.gem[n].handle; + i->drm.mmap[n].size = i->drm.gem[n].size; + ret = ioctl(i->drm.fd, DRM_IOCTL_EXYNOS_GEM_MMAP, &i->drm.mmap[n]); + if (ret < 0) { + ioctl(i->drm.fd, DRM_IOCTL_GEM_CLOSE, &args); + err("Failed to mmap gem"); + return -1; + } + ret = drmModeAddFB(i->drm.fd, i->drm.width, i->drm.height, 32, + 32, 4 * i->drm.width, i->drm.gem[n].handle, &fb_id); + if (ret) { + munmap((void *)(unsigned long)i->drm.mmap[n].mapped, + i->drm.gem[n].size); + ioctl(i->drm.fd, DRM_IOCTL_GEM_CLOSE, &args); + err("Failed to add fb"); + return -1; + } + i->drm.fb[n] = fb_id; + i->drm.p[n] = (char *)(unsigned int)i->drm.mmap[n].mapped; + i->fimc.p[n] = (char *)(unsigned int)i->drm.mmap[n].mapped; + } + + snprintf(mode, 32, "%dx%d", crtc->width, crtc->height); + + connector = drmModeGetConnector(i->drm.fd, i->drm.conn_id); + if (!connector || connector->connector_id != i->drm.conn_id) { + err("Couldn't find the connector"); + drmModeFreeConnector(connector); + return -1; + } + + mode_drm = 0; + + for (n = 0; n < connector->count_modes; n++) { + if (!strncmp(connector->modes[n].name, mode, 32)) { + mode_drm = &connector->modes[n]; + break; + } + } + + if (!mode_drm) { + err("Failed to find mode\n"); + drmModeFreeConnector(connector); + return -1; + } + + ret = drmModeSetCrtc(i->drm.fd, i->drm.crtc_id, i->drm.fb[0], 0, 0, + &i->drm.conn_id, 1, mode_drm); + if (ret) { + err("Failed to set crtc"); + drmModeFreeConnector(connector); + return -1; + } + + i->fimc.width = i->drm.width; + i->fimc.height = i->drm.height; + i->fimc.stride = i->drm.width * 4; + i->fimc.bpp = 32; + i->fimc.buffers = (i->fimc.double_buf?2:1); + i->fimc.size = i->drm.width * i->drm.height * 4; + + i->drm.crtc[0] = i->drm.crtc_id; + i->drm.crtc[1] = i->drm.crtc_id; + + return 0; +} + +void drm_close(struct instance *i) +{ + drmClose(i->drm.fd); +} + +#else /* DRM */ + +int drm_open(struct instance *i, char *name) +{ + return 0; +}; + +void drm_close(struct instance *i) { + return; +} + +#endif /* DRM */ |