system/hwc3/DrmAtomicRequest.cpp

/*
 * Copyright 2022 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include "DrmAtomicRequest.h"

namespace aidl::android::hardware::graphics::composer3::impl {

std::unique_ptr<DrmAtomicRequest> DrmAtomicRequest::create() {
    drmModeAtomicReqPtr request = drmModeAtomicAlloc();
    if (!request) {
        return nullptr;
    }

    return std::unique_ptr<DrmAtomicRequest>(new DrmAtomicRequest(request));
}

DrmAtomicRequest::~DrmAtomicRequest() {
    if (mRequest) {
        drmModeAtomicFree(mRequest);
    }
}

bool DrmAtomicRequest::Set(uint32_t objectId, const DrmProperty& prop, uint64_t value) {
    int ret = drmModeAtomicAddProperty(mRequest, objectId, prop.getId(), value);
    if (ret < 0) {
        ALOGE("%s: failed to set atomic request property %s to %" PRIu64 ": %s", __FUNCTION__,
              prop.getName().c_str(), value, strerror(errno));
        return false;
    }
    return true;
}

bool DrmAtomicRequest::Commit(::android::base::borrowed_fd drmFd) {
    constexpr const uint32_t kCommitFlags = DRM_MODE_ATOMIC_ALLOW_MODESET;

    int ret = drmModeAtomicCommit(drmFd.get(), mRequest, kCommitFlags, 0);
    if (ret) {
        ALOGE("%s:%d: atomic commit failed: %s\n", __FUNCTION__, __LINE__, strerror(errno));
        return false;
    }

    return true;
}

}  // namespace aidl::android::hardware::graphics::composer3::impl