1 /* 2 * Copyright 2018 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #pragma once 18 19 #include <array> 20 #include <cstdint> 21 #include <optional> 22 #include <string> 23 #include <string_view> 24 #include <vector> 25 26 #include <ui/DeviceProductInfo.h> 27 #include <ui/DisplayId.h> 28 29 #define LEGACY_DISPLAY_TYPE_PRIMARY 0 30 #define LEGACY_DISPLAY_TYPE_EXTERNAL 1 31 32 namespace android { 33 34 using DisplayIdentificationData = std::vector<uint8_t>; 35 36 struct DisplayIdentificationInfo { 37 PhysicalDisplayId id; 38 std::string name; 39 std::optional<DeviceProductInfo> deviceProductInfo; 40 }; 41 42 struct ExtensionBlock { 43 uint8_t tag; 44 uint8_t revisionNumber; 45 }; 46 47 struct HdmiPhysicalAddress { 48 // The address describes the path from the display sink in the network of connected HDMI 49 // devices. The format of the address is "a.b.c.d". For example, address 2.1.0.0 means we are 50 // connected to port 1 of a device which is connected to port 2 of the sink. 51 uint8_t a, b, c, d; 52 }; 53 54 struct HdmiVendorDataBlock { 55 HdmiPhysicalAddress physicalAddress; 56 }; 57 58 struct Cea861ExtensionBlock : ExtensionBlock { 59 std::optional<HdmiVendorDataBlock> hdmiVendorDataBlock; 60 }; 61 62 struct Edid { 63 uint16_t manufacturerId; 64 uint16_t productId; 65 PnpId pnpId; 66 uint32_t modelHash; 67 std::string_view displayName; 68 uint8_t manufactureOrModelYear; 69 uint8_t manufactureWeek; 70 std::optional<Cea861ExtensionBlock> cea861Block; 71 }; 72 73 bool isEdid(const DisplayIdentificationData&); 74 std::optional<Edid> parseEdid(const DisplayIdentificationData&); 75 std::optional<PnpId> getPnpId(uint16_t manufacturerId); 76 std::optional<PnpId> getPnpId(PhysicalDisplayId); 77 78 std::optional<DisplayIdentificationInfo> parseDisplayIdentificationData( 79 uint8_t port, const DisplayIdentificationData&); 80 81 PhysicalDisplayId getVirtualDisplayId(uint32_t id); 82 83 // CityHash64 implementation that only hashes at most the first 16 characters of the given string. 84 uint64_t cityHash64Len0To16(std::string_view sv); 85 86 } // namespace android 87