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https://github.com/mpv-player/mpv
synced 2024-12-29 02:22:19 +00:00
19e5155147
On some platforms the ZPOS property might exist, but be immutable. This is at least the case on Intel Sandy Bridge since Linux kernel 5.5.0. Trying to set an immutable property will cause. drmModeAtomicCommit to fail with -EINVAL. On other platforms we might want to set ZPOS to tweak the layering of planes. To reconcile these two, simply have drm_object_set_property check if a property is immutable before attempting to add it to the atomic commit, instead returning an error code (which is, as previously, ignored in the case of ZPOS as we don't strictly need it)
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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