98 lines
3.0 KiB
C++
98 lines
3.0 KiB
C++
/*
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* Copyright 2022 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#pragma once
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#include <android-base/logging.h>
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#include <android-base/unique_fd.h>
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#include <xf86drm.h>
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#include <xf86drmMode.h>
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#include <cstdint>
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#include <string>
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#include <unordered_map>
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#include "Common.h"
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namespace aidl::android::hardware::graphics::composer3::impl {
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class DrmProperty {
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public:
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DrmProperty() {}
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DrmProperty(uint32_t id, uint64_t value, std::string name)
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: mId(id), mValue(value), mName(name) {}
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~DrmProperty() {}
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uint32_t getId() const { return mId; }
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uint64_t getValue() const { return mValue; }
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const std::string& getName() const { return mName; }
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private:
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uint32_t mId = -1;
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uint64_t mValue = -1;
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std::string mName;
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};
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template <typename T>
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using DrmPropertyMember = DrmProperty T::*;
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template <typename T>
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using DrmPropertyMemberMap = std::unordered_map<std::string, DrmPropertyMember<T>>;
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// Helper to many DrmProperty members for DrmCrtc, DrmConnector, and DrmPlane.
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template <typename T>
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bool LoadDrmProperties(::android::base::borrowed_fd drmFd, uint32_t objectId, uint32_t objectType,
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const DrmPropertyMemberMap<T>& objectPropertyMap, T* object) {
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auto drmProperties = drmModeObjectGetProperties(drmFd.get(), objectId, objectType);
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if (!drmProperties) {
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ALOGE("%s: Failed to get properties: %s", __FUNCTION__, strerror(errno));
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return false;
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}
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for (uint32_t i = 0; i < drmProperties->count_props; ++i) {
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const auto propertyId = drmProperties->props[i];
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auto drmProperty = drmModeGetProperty(drmFd.get(), propertyId);
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if (!drmProperty) {
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ALOGE("%s: Failed to get property: %s", __FUNCTION__, strerror(errno));
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continue;
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}
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const auto propertyName = drmProperty->name;
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const auto propertyValue = drmProperties->prop_values[i];
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auto it = objectPropertyMap.find(propertyName);
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if (it != objectPropertyMap.end()) {
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DEBUG_LOG("%s: Loaded property:%" PRIu32 " (%s) val:%" PRIu64, __FUNCTION__, propertyId,
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propertyName, propertyValue);
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auto& objectPointerToMember = it->second;
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object->*objectPointerToMember = DrmProperty(propertyId, propertyValue, propertyName);
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}
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drmModeFreeProperty(drmProperty);
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}
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drmModeFreeObjectProperties(drmProperties);
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return true;
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}
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} // namespace aidl::android::hardware::graphics::composer3::impl
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