mirror of https://github.com/mpv-player/mpv
455 lines
15 KiB
C
455 lines
15 KiB
C
/*
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* This file is part of mpv.
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*
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* mpv is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* mpv is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with mpv. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <errno.h>
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#include <inttypes.h>
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#include "common/common.h"
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#include "common/msg.h"
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#include "drm_atomic.h"
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int drm_object_create_properties(struct mp_log *log, int fd,
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struct drm_object *object)
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{
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object->props = drmModeObjectGetProperties(fd, object->id, object->type);
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if (object->props) {
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object->props_info = talloc_zero_size(NULL, object->props->count_props
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* sizeof(object->props_info));
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if (object->props_info) {
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for (int i = 0; i < object->props->count_props; i++)
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object->props_info[i] = drmModeGetProperty(fd, object->props->props[i]);
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} else {
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mp_err(log, "Out of memory\n");
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goto fail;
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}
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} else {
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mp_err(log, "Failed to retrieve properties for object id %d\n", object->id);
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goto fail;
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}
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return 0;
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fail:
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drm_object_free_properties(object);
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return -1;
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}
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void drm_object_free_properties(struct drm_object *object)
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{
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if (object->props) {
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for (int i = 0; i < object->props->count_props; i++) {
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if (object->props_info[i]) {
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drmModeFreeProperty(object->props_info[i]);
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object->props_info[i] = NULL;
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}
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}
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talloc_free(object->props_info);
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object->props_info = NULL;
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drmModeFreeObjectProperties(object->props);
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object->props = NULL;
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}
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}
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int drm_object_get_property(struct drm_object *object, char *name, uint64_t *value)
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{
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for (int i = 0; i < object->props->count_props; i++) {
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if (strcasecmp(name, object->props_info[i]->name) == 0) {
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*value = object->props->prop_values[i];
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return 0;
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}
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}
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return -EINVAL;
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}
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drmModePropertyBlobPtr drm_object_get_property_blob(struct drm_object *object, char *name)
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{
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uint64_t blob_id;
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if (!drm_object_get_property(object, name, &blob_id)) {
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return drmModeGetPropertyBlob(object->fd, blob_id);
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}
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return NULL;
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}
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int drm_object_set_property(drmModeAtomicReq *request, struct drm_object *object,
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char *name, uint64_t value)
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{
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for (int i = 0; i < object->props->count_props; i++) {
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if (strcasecmp(name, object->props_info[i]->name) == 0) {
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if (object->props_info[i]->flags & DRM_MODE_PROP_IMMUTABLE) {
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/* Do not try to set immutable values, as this might cause the
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* atomic commit operation to fail. */
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return -EINVAL;
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}
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return drmModeAtomicAddProperty(request, object->id,
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object->props_info[i]->prop_id, value);
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}
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}
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return -EINVAL;
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}
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struct drm_object * drm_object_create(struct mp_log *log, int fd,
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uint32_t object_id, uint32_t type)
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{
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struct drm_object *obj = NULL;
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obj = talloc_zero(NULL, struct drm_object);
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obj->id = object_id;
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obj->type = type;
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obj->fd = fd;
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if (drm_object_create_properties(log, fd, obj)) {
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talloc_free(obj);
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return NULL;
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}
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return obj;
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}
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void drm_object_free(struct drm_object *object)
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{
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if (object) {
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drm_object_free_properties(object);
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talloc_free(object);
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}
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}
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void drm_object_print_info(struct mp_log *log, struct drm_object *object)
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{
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mp_err(log, "Object ID = %d (type = %x) has %d properties\n",
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object->id, object->type, object->props->count_props);
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for (int i = 0; i < object->props->count_props; i++)
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mp_err(log, " Property '%s' = %lld\n", object->props_info[i]->name,
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(long long)object->props->prop_values[i]);
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}
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struct drm_atomic_context *drm_atomic_create_context(struct mp_log *log, int fd, int crtc_id,
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int connector_id,
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int draw_plane_idx, int drmprime_video_plane_idx)
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{
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drmModePlaneRes *plane_res = NULL;
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drmModeRes *res = NULL;
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struct drm_object *plane = NULL;
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struct drm_atomic_context *ctx;
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int crtc_index = -1;
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int layercount = -1;
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int primary_id = 0;
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int overlay_id = 0;
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uint64_t value;
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res = drmModeGetResources(fd);
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if (!res) {
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mp_err(log, "Cannot retrieve DRM resources: %s\n", mp_strerror(errno));
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goto fail;
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}
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plane_res = drmModeGetPlaneResources(fd);
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if (!plane_res) {
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mp_err(log, "Cannot retrieve plane ressources: %s\n", mp_strerror(errno));
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goto fail;
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}
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ctx = talloc_zero(NULL, struct drm_atomic_context);
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if (!ctx) {
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mp_err(log, "Out of memory\n");
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goto fail;
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}
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ctx->fd = fd;
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ctx->crtc = drm_object_create(log, ctx->fd, crtc_id, DRM_MODE_OBJECT_CRTC);
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if (!ctx->crtc) {
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mp_err(log, "Failed to create CRTC object\n");
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goto fail;
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}
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for (int i = 0; i < res->count_crtcs; i++) {
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if (res->crtcs[i] == crtc_id) {
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crtc_index = i;
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break;
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}
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}
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for (int i = 0; i < res->count_connectors; i++) {
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drmModeConnector *connector = drmModeGetConnector(fd, res->connectors[i]);
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if (connector) {
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if (connector->connector_id == connector_id)
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ctx->connector = drm_object_create(log, ctx->fd, connector->connector_id,
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DRM_MODE_OBJECT_CONNECTOR);
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drmModeFreeConnector(connector);
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if (ctx->connector)
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break;
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}
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}
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for (unsigned int j = 0; j < plane_res->count_planes; j++) {
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drmModePlane *drmplane = drmModeGetPlane(ctx->fd, plane_res->planes[j]);
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const uint32_t possible_crtcs = drmplane->possible_crtcs;
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const uint32_t plane_id = drmplane->plane_id;
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drmModeFreePlane(drmplane);
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drmplane = NULL;
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if (possible_crtcs & (1 << crtc_index)) {
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plane = drm_object_create(log, ctx->fd, plane_id,
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DRM_MODE_OBJECT_PLANE);
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if (!plane) {
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mp_err(log, "Failed to create Plane object from plane ID %d\n",
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plane_id);
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goto fail;
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}
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if (drm_object_get_property(plane, "TYPE", &value) == -EINVAL) {
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mp_err(log, "Unable to retrieve type property from plane %d\n", j);
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goto fail;
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}
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if (value != DRM_PLANE_TYPE_CURSOR) { // Skip cursor planes
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layercount++;
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if ((!primary_id) && (value == DRM_PLANE_TYPE_PRIMARY))
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primary_id = plane_id;
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if ((!overlay_id) && (value == DRM_PLANE_TYPE_OVERLAY))
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overlay_id = plane_id;
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if (layercount == draw_plane_idx) {
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ctx->draw_plane = plane;
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continue;
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}
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if (layercount == drmprime_video_plane_idx) {
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ctx->drmprime_video_plane = plane;
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continue;
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}
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}
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drm_object_free(plane);
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plane = NULL;
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}
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}
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// draw plane was specified as either of the special options: any primary plane or any overlay plane
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if (!ctx->draw_plane) {
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const int draw_plane_id = (draw_plane_idx == DRM_OPTS_OVERLAY_PLANE) ? overlay_id : primary_id;
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const char *plane_type = (draw_plane_idx == DRM_OPTS_OVERLAY_PLANE) ? "overlay" : "primary";
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if (draw_plane_id) {
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mp_verbose(log, "Using %s plane %d as draw plane\n", plane_type, draw_plane_id);
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ctx->draw_plane = drm_object_create(log, ctx->fd, draw_plane_id, DRM_MODE_OBJECT_PLANE);
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} else {
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mp_err(log, "Failed to find draw plane with idx=%d\n", draw_plane_idx);
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goto fail;
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}
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} else {
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mp_verbose(log, "Found draw plane with ID %d\n", ctx->draw_plane->id);
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}
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// drmprime plane was specified as either of the special options: any primary plane or any overlay plane
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if (!ctx->drmprime_video_plane) {
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const int drmprime_video_plane_id = (drmprime_video_plane_idx == DRM_OPTS_PRIMARY_PLANE) ? primary_id : overlay_id;
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const char *plane_type = (drmprime_video_plane_idx == DRM_OPTS_PRIMARY_PLANE) ? "primary" : "overlay";
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if (drmprime_video_plane_id) {
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mp_verbose(log, "Using %s plane %d as drmprime plane\n", plane_type, drmprime_video_plane_id);
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ctx->drmprime_video_plane = drm_object_create(log, ctx->fd, drmprime_video_plane_id, DRM_MODE_OBJECT_PLANE);
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} else {
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mp_verbose(log, "Failed to find drmprime plane with idx=%d. drmprime-drm hwdec interop will not work\n", drmprime_video_plane_idx);
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}
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} else {
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mp_verbose(log, "Found drmprime plane with ID %d\n", ctx->drmprime_video_plane->id);
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}
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drmModeFreePlaneResources(plane_res);
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drmModeFreeResources(res);
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return ctx;
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fail:
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if (res)
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drmModeFreeResources(res);
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if (plane_res)
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drmModeFreePlaneResources(plane_res);
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if (plane)
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drm_object_free(plane);
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return NULL;
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}
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void drm_atomic_destroy_context(struct drm_atomic_context *ctx)
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{
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drm_mode_destroy_blob(ctx->fd, &ctx->old_state.crtc.mode);
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drm_object_free(ctx->crtc);
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drm_object_free(ctx->connector);
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drm_object_free(ctx->draw_plane);
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drm_object_free(ctx->drmprime_video_plane);
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talloc_free(ctx);
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}
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static bool drm_atomic_save_plane_state(struct drm_object *plane,
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struct drm_atomic_plane_state *plane_state)
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{
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if (!plane)
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return true;
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bool ret = true;
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if (0 > drm_object_get_property(plane, "FB_ID", &plane_state->fb_id))
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ret = false;
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if (0 > drm_object_get_property(plane, "CRTC_ID", &plane_state->crtc_id))
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ret = false;
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if (0 > drm_object_get_property(plane, "SRC_X", &plane_state->src_x))
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ret = false;
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if (0 > drm_object_get_property(plane, "SRC_Y", &plane_state->src_y))
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ret = false;
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if (0 > drm_object_get_property(plane, "SRC_W", &plane_state->src_w))
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ret = false;
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if (0 > drm_object_get_property(plane, "SRC_H", &plane_state->src_h))
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ret = false;
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if (0 > drm_object_get_property(plane, "CRTC_X", &plane_state->crtc_x))
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ret = false;
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if (0 > drm_object_get_property(plane, "CRTC_Y", &plane_state->crtc_y))
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ret = false;
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if (0 > drm_object_get_property(plane, "CRTC_W", &plane_state->crtc_w))
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ret = false;
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if (0 > drm_object_get_property(plane, "CRTC_H", &plane_state->crtc_h))
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ret = false;
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// ZPOS might not exist, so ignore whether or not this succeeds
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drm_object_get_property(plane, "ZPOS", &plane_state->zpos);
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return ret;
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}
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static bool drm_atomic_restore_plane_state(drmModeAtomicReq *request,
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struct drm_object *plane,
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const struct drm_atomic_plane_state *plane_state)
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{
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if (!plane)
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return true;
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bool ret = true;
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if (0 > drm_object_set_property(request, plane, "FB_ID", plane_state->fb_id))
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ret = false;
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if (0 > drm_object_set_property(request, plane, "CRTC_ID", plane_state->crtc_id))
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ret = false;
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if (0 > drm_object_set_property(request, plane, "SRC_X", plane_state->src_x))
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ret = false;
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if (0 > drm_object_set_property(request, plane, "SRC_Y", plane_state->src_y))
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ret = false;
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if (0 > drm_object_set_property(request, plane, "SRC_W", plane_state->src_w))
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ret = false;
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if (0 > drm_object_set_property(request, plane, "SRC_H", plane_state->src_h))
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ret = false;
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if (0 > drm_object_set_property(request, plane, "CRTC_X", plane_state->crtc_x))
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ret = false;
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if (0 > drm_object_set_property(request, plane, "CRTC_Y", plane_state->crtc_y))
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ret = false;
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if (0 > drm_object_set_property(request, plane, "CRTC_W", plane_state->crtc_w))
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ret = false;
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if (0 > drm_object_set_property(request, plane, "CRTC_H", plane_state->crtc_h))
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ret = false;
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// ZPOS might not exist, or be immutable, so ignore whether or not this succeeds
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drm_object_set_property(request, plane, "ZPOS", plane_state->zpos);
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return ret;
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}
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bool drm_atomic_save_old_state(struct drm_atomic_context *ctx)
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{
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if (ctx->old_state.saved)
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return false;
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bool ret = true;
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drmModeCrtc *crtc = drmModeGetCrtc(ctx->fd, ctx->crtc->id);
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if (crtc == NULL)
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return false;
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ctx->old_state.crtc.mode.mode = crtc->mode;
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drmModeFreeCrtc(crtc);
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if (0 > drm_object_get_property(ctx->crtc, "ACTIVE", &ctx->old_state.crtc.active))
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ret = false;
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if (0 > drm_object_get_property(ctx->connector, "CRTC_ID", &ctx->old_state.connector.crtc_id))
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ret = false;
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if (!drm_atomic_save_plane_state(ctx->draw_plane, &ctx->old_state.draw_plane))
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ret = false;
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if (!drm_atomic_save_plane_state(ctx->drmprime_video_plane, &ctx->old_state.drmprime_video_plane))
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ret = false;
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ctx->old_state.saved = true;
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return ret;
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}
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bool drm_atomic_restore_old_state(drmModeAtomicReqPtr request, struct drm_atomic_context *ctx)
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{
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if (!ctx->old_state.saved)
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return false;
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bool ret = true;
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if (0 > drm_object_set_property(request, ctx->connector, "CRTC_ID", ctx->old_state.connector.crtc_id))
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ret = false;
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if (!drm_mode_ensure_blob(ctx->fd, &ctx->old_state.crtc.mode))
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ret = false;
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if (0 > drm_object_set_property(request, ctx->crtc, "MODE_ID", ctx->old_state.crtc.mode.blob_id))
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ret = false;
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if (0 > drm_object_set_property(request, ctx->crtc, "ACTIVE", ctx->old_state.crtc.active))
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ret = false;
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if (!drm_atomic_restore_plane_state(request, ctx->draw_plane, &ctx->old_state.draw_plane))
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ret = false;
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if (!drm_atomic_restore_plane_state(request, ctx->drmprime_video_plane, &ctx->old_state.drmprime_video_plane))
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ret = false;
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ctx->old_state.saved = false;
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return ret;
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}
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bool drm_mode_ensure_blob(int fd, struct drm_mode *mode)
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{
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int ret = 0;
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if (!mode->blob_id) {
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ret = drmModeCreatePropertyBlob(fd, &mode->mode, sizeof(drmModeModeInfo),
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&mode->blob_id);
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}
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return (ret == 0);
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}
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bool drm_mode_destroy_blob(int fd, struct drm_mode *mode)
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{
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int ret = 0;
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if (mode->blob_id) {
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ret = drmModeDestroyPropertyBlob(fd, mode->blob_id);
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mode->blob_id = 0;
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}
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return (ret == 0);
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}
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