// SPDX-License-Identifier: MIT
/*
 * Copyright © 2023 Intel Corporation
 */

#include <drm/drm_modeset_lock.h>

#include "intel_display_types.h"
#include "intel_modeset_lock.h"

void _intel_modeset_lock_begin(struct drm_modeset_acquire_ctx *ctx,
                               struct intel_atomic_state *state,
                               unsigned int flags, int *ret)
{
        drm_modeset_acquire_init(ctx, flags);

        if (state)
                state->base.acquire_ctx = ctx;

        *ret = -EDEADLK;
}

bool _intel_modeset_lock_loop(int *ret)
{
        if (*ret == -EDEADLK) {
                *ret = 0;
                return true;
        }

        return false;
}

void _intel_modeset_lock_end(struct drm_modeset_acquire_ctx *ctx,
                             struct intel_atomic_state *state,
                             int *ret)
{
        if (*ret == -EDEADLK) {
                if (state)
                        drm_atomic_state_clear(&state->base);

                *ret = drm_modeset_backoff(ctx);
                if (*ret == 0) {
                        *ret = -EDEADLK;
                        return;
                }
        }

        drm_modeset_drop_locks(ctx);
        drm_modeset_acquire_fini(ctx);
}