diff options
Diffstat (limited to 'video/out/drm_atomic.c')
| -rw-r--r-- | video/out/drm_atomic.c | 244 |
1 files changed, 244 insertions, 0 deletions
diff --git a/video/out/drm_atomic.c b/video/out/drm_atomic.c new file mode 100644 index 0000000000..a908826677 --- /dev/null +++ b/video/out/drm_atomic.c @@ -0,0 +1,244 @@ +/* + * This file is part of mpv. + * + * mpv is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * mpv 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 Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with mpv. If not, see <http://www.gnu.org/licenses/>. + */ + +#include <errno.h> +#include <inttypes.h> + +#include "common/common.h" +#include "common/msg.h" +#include "drm_atomic.h" + +int drm_object_create_properties(struct mp_log *log, int fd, + struct drm_object *object) +{ + object->props = drmModeObjectGetProperties(fd, object->id, object->type); + if (object->props) { + object->props_info = talloc_zero_size(NULL, object->props->count_props + * sizeof(object->props_info)); + if (object->props_info) { + for (int i = 0; i < object->props->count_props; i++) + object->props_info[i] = drmModeGetProperty(fd, object->props->props[i]); + } else { + mp_err(log, "Out of memory\n"); + goto fail; + } + } else { + mp_err(log, "Failed to retrieve properties for object id %d\n", object->id); + goto fail; + } + + return 0; + + fail: + drm_object_free_properties(object); + return -1; +} + +void drm_object_free_properties(struct drm_object *object) +{ + if (object->props) { + for (int i = 0; i < object->props->count_props; i++) { + if (object->props_info[i]) { + drmModeFreeProperty(object->props_info[i]); + object->props_info[i] = NULL; + } + } + + talloc_free(object->props_info); + object->props_info = NULL; + + drmModeFreeObjectProperties(object->props); + object->props = NULL; + } +} + +int drm_object_get_property(struct drm_object *object, char *name, uint64_t *value) +{ + for (int i = 0; i < object->props->count_props; i++) { + if (strcasecmp(name, object->props_info[i]->name) == 0) { + *value = object->props->prop_values[i]; + return 0; + } + } + + return -EINVAL; +} + +int drm_object_set_property(drmModeAtomicReq *request, struct drm_object *object, + char *name, uint64_t value) +{ + for (int i = 0; i < object->props->count_props; i++) { + if (strcasecmp(name, object->props_info[i]->name) == 0) { + return drmModeAtomicAddProperty(request, object->id, + object->props_info[i]->prop_id, value); + } + } + + return -EINVAL; +} + +struct drm_object * drm_object_create(struct mp_log *log, int fd, + uint32_t object_id, uint32_t type) +{ + struct drm_object *obj = NULL; + obj = talloc_zero(NULL, struct drm_object); + obj->id = object_id; + obj->type = type; + + if (drm_object_create_properties(log, fd, obj)) { + talloc_free(obj); + return NULL; + } + + return obj; +} + +void drm_object_free(struct drm_object *object) +{ + if (object) { + drm_object_free_properties(object); + talloc_free(object); + } +} + +void drm_object_print_info(struct mp_log *log, struct drm_object *object) +{ + mp_err(log, "Object ID = %d (type = %x) has %d properties\n", + object->id, object->type, object->props->count_props); + + for (int i = 0; i < object->props->count_props; i++) + mp_err(log, " Property '%s' = %lld\n", object->props_info[i]->name, + (long long)object->props->prop_values[i]); +} + +struct drm_atomic_context *drm_atomic_create_context(struct mp_log *log, int fd, + int crtc_id, int overlay_id) +{ + drmModePlane *drmplane = NULL; + drmModePlaneRes *plane_res = NULL; + drmModeRes *res = NULL; + struct drm_object *plane = NULL; + struct drm_atomic_context *ctx; + int crtc_index = -1; + int layercount = 0; + uint64_t value; + + res = drmModeGetResources(fd); + if (!res) { + mp_err(log, "Cannot retrieve DRM resources: %s\n", mp_strerror(errno)); + goto fail; + } + + plane_res = drmModeGetPlaneResources(fd); + if (!plane_res) { + mp_err(log, "Cannot retrieve plane ressources: %s\n", mp_strerror(errno)); + goto fail; + } + + ctx = talloc_zero(NULL, struct drm_atomic_context); + if (!ctx) { + mp_err(log, "Out of memory\n"); + goto fail; + } + + ctx->fd = fd; + ctx->crtc = drm_object_create(log, ctx->fd, crtc_id, DRM_MODE_OBJECT_CRTC); + if (!ctx->crtc) { + mp_err(log, "Failed to create CRTC object\n"); + goto fail; + } + + for (int i = 0; i < res->count_crtcs; i++) { + if (res->crtcs[i] == crtc_id) { + crtc_index = i; + break; + } + } + + for (unsigned int j = 0; j < plane_res->count_planes; j++) { + + drmplane = drmModeGetPlane (ctx->fd, plane_res->planes[j]); + if (drmplane->possible_crtcs & (1 << crtc_index)) { + plane = drm_object_create(log, ctx->fd, drmplane->plane_id, + DRM_MODE_OBJECT_PLANE); + + if (plane) { + if (drm_object_get_property(plane, "TYPE", &value) == -EINVAL) { + mp_err(log, "Unable to retrieve type property from plane %d\n", j); + goto fail; + } else { + if ((value == DRM_PLANE_TYPE_OVERLAY) && + (layercount == overlay_id)) { + ctx->overlay_plane = plane; + } + else if (value == DRM_PLANE_TYPE_PRIMARY) { + ctx->primary_plane = plane; + } + else { + drm_object_free(plane); + plane = NULL; + } + + if (value == DRM_PLANE_TYPE_OVERLAY) + layercount++; + } + } else { + mp_err(log, "Failed to create Plane object from plane ID %d\n", + drmplane->plane_id); + goto fail; + } + } + drmModeFreePlane(drmplane); + } + + if (!ctx->primary_plane) { + mp_err(log, "Failed to find primary plane\n"); + goto fail; + } + + if (!ctx->overlay_plane) { + mp_err(log, "Failed to find overlay plane with id=%d\n", overlay_id); + goto fail; + } + + mp_verbose(log, "Found Primary plane with ID %d, overlay with ID %d\n", + ctx->primary_plane->id, ctx->overlay_plane->id); + + drmModeFreePlaneResources(plane_res); + drmModeFreeResources(res); + return ctx; + + +fail: + if (res) + drmModeFreeResources(res); + if (plane_res) + drmModeFreePlaneResources(plane_res); + if (drmplane) + drmModeFreePlane(drmplane); + if (plane) + drm_object_free(plane); + return false; +} + +void drm_atomic_destroy_context(struct drm_atomic_context *ctx) +{ + drm_object_free(ctx->crtc); + drm_object_free(ctx->primary_plane); + drm_object_free(ctx->overlay_plane); + talloc_free(ctx); +} |