mpv/video/out/drm_atomic.h

/*
 * 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/>.
 */

#ifndef MP_DRMATOMIC_H
#define MP_DRMATOMIC_H

#include <stdlib.h>
#include <stdbool.h>
#include <xf86drm.h>
#include <xf86drmMode.h>

#include "common/msg.h"

#define DRM_OPTS_PRIMARY_PLANE -1
#define DRM_OPTS_OVERLAY_PLANE -2

struct drm_mode {
    drmModeModeInfo mode;
    uint32_t blob_id;
};

struct drm_atomic_plane_state {
    uint64_t fb_id;
    uint64_t crtc_id;
    uint64_t src_x;
    uint64_t src_y;
    uint64_t src_w;
    uint64_t src_h;
    uint64_t crtc_x;
    uint64_t crtc_y;
    uint64_t crtc_w;
    uint64_t crtc_h;
    uint64_t zpos;
};

// Used to store the restore state for VT switching and uninit
struct drm_atomic_state {
    bool saved;
    struct {
        uint64_t crtc_id;
    } connector;
    struct {
        struct drm_mode mode;
        uint64_t active;
        uint64_t vrr_enabled;
    } crtc;
    struct drm_atomic_plane_state draw_plane;
    struct drm_atomic_plane_state drmprime_video_plane;
};

struct drm_object {
    int fd;
    uint32_t id;
    uint32_t type;
    drmModeObjectProperties *props;
    drmModePropertyRes **props_info;
};

struct drm_atomic_context {
    int fd;

    struct drm_object *crtc;
    struct drm_object *connector;
    struct drm_object *draw_plane;
    struct drm_object *drmprime_video_plane;

    drmModeAtomicReq *request;

    struct drm_atomic_state old_state;
};


int drm_object_create_properties(struct mp_log *log, int fd, struct drm_object *object);
void drm_object_free_properties(struct drm_object *object);
int drm_object_get_property(struct drm_object *object, char *name, uint64_t *value);
int drm_object_set_property(drmModeAtomicReq *request, struct drm_object *object, char *name, uint64_t value);
drmModePropertyBlobPtr drm_object_get_property_blob(struct drm_object *object, char *name);
struct drm_object * drm_object_create(struct mp_log *log, int fd, uint32_t object_id, uint32_t type);
void drm_object_free(struct drm_object *object);
void drm_object_print_info(struct mp_log *log, struct drm_object *object);
struct drm_atomic_context *drm_atomic_create_context(struct mp_log *log, int fd, int crtc_id, int connector_id,
                                                     int draw_plane_idx, int drmprime_video_plane_idx);
void drm_atomic_destroy_context(struct drm_atomic_context *ctx);

bool drm_atomic_save_old_state(struct drm_atomic_context *ctx);
bool drm_atomic_restore_old_state(drmModeAtomicReq *request, struct drm_atomic_context *ctx);

bool drm_mode_ensure_blob(int fd, struct drm_mode *mode);
bool drm_mode_destroy_blob(int fd, struct drm_mode *mode);

#endif // MP_DRMATOMIC_H