1 /* 2 * Copyright (C) 2015 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 <pthread.h> 20 21 #include <memory> 22 #include <optional> 23 24 #include "compositor/DisplayInfo.h" 25 #include "compositor/DrmKmsPlan.h" 26 #include "compositor/LayerData.h" 27 #include "drm/DrmPlane.h" 28 #include "drm/ResourceManager.h" 29 #include "drm/VSyncWorker.h" 30 31 namespace android { 32 33 struct AtomicCommitArgs { 34 /* inputs. All fields are optional, but at least one has to be specified */ 35 bool test_only = false; 36 bool blocking = false; 37 std::optional<DrmMode> display_mode; 38 std::optional<bool> active; 39 std::shared_ptr<DrmKmsPlan> composition; 40 std::shared_ptr<drm_color_ctm> color_matrix; 41 std::optional<Colorspace> colorspace; 42 std::optional<int32_t> content_type; 43 std::shared_ptr<hdr_output_metadata> hdr_metadata; 44 std::optional<int32_t> min_bpc; 45 46 std::shared_ptr<DrmFbIdHandle> writeback_fb; 47 SharedFd writeback_release_fence; 48 49 /* out */ 50 SharedFd out_fence; 51 52 /* helpers */ 53 auto HasInputs() const -> bool { 54 return display_mode || active || composition; 55 } 56 }; 57 58 class DrmAtomicStateManager { 59 public: 60 static auto CreateInstance(DrmDisplayPipeline *pipe) 61 -> std::shared_ptr<DrmAtomicStateManager>; 62 63 ~DrmAtomicStateManager() = default; 64 65 auto ExecuteAtomicCommit(AtomicCommitArgs &args) -> int; 66 auto ActivateDisplayUsingDPMS() -> int; 67 StopThread()68 void StopThread() { 69 { 70 const std::unique_lock lock(mutex_); 71 exit_thread_ = true; 72 } 73 cv_.notify_all(); 74 } 75 76 private: 77 DrmAtomicStateManager() = default; 78 auto CommitFrame(AtomicCommitArgs &args) -> int; 79 80 struct KmsState { 81 /* Required to cleanup unused planes */ 82 std::vector<std::shared_ptr<BindingOwner<DrmPlane>>> used_planes; 83 /* We have to hold a reference to framebuffer while displaying it , 84 * otherwise picture will blink */ 85 std::vector<std::shared_ptr<DrmFbIdHandle>> used_framebuffers; 86 87 DrmModeUserPropertyBlobUnique mode_blob; 88 DrmModeUserPropertyBlobUnique ctm_blob; 89 DrmModeUserPropertyBlobUnique hdr_metadata_blob; 90 91 int release_fence_pt_index{}; 92 93 /* To avoid setting the inactive state twice, which will fail the commit */ 94 bool crtc_active_state{}; 95 } active_frame_state_; 96 97 auto NewFrameState() -> KmsState { 98 auto *prev_frame_state = &active_frame_state_; 99 return (KmsState){ 100 .used_planes = prev_frame_state->used_planes, 101 .crtc_active_state = prev_frame_state->crtc_active_state, 102 }; 103 } 104 105 DrmDisplayPipeline *pipe_{}; 106 107 void CleanupPriorFrameResources(); 108 109 KmsState staged_frame_state_; 110 SharedFd last_present_fence_; 111 int frames_staged_{}; 112 int frames_tracked_{}; 113 114 DstRectInfo whole_display_rect_{}; 115 116 void ThreadFn(const std::shared_ptr<DrmAtomicStateManager> &dasm); 117 std::condition_variable cv_; 118 std::mutex mutex_; 119 bool exit_thread_{}; 120 }; 121 122 } // namespace android 123