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 44 std::shared_ptr<DrmFbIdHandle> writeback_fb; 45 SharedFd writeback_release_fence; 46 47 /* out */ 48 SharedFd out_fence; 49 50 /* helpers */ 51 auto HasInputs() const -> bool { 52 return display_mode || active || composition; 53 } 54 }; 55 56 class DrmAtomicStateManager { 57 public: 58 static auto CreateInstance(DrmDisplayPipeline *pipe) 59 -> std::shared_ptr<DrmAtomicStateManager>; 60 61 ~DrmAtomicStateManager() = default; 62 63 auto ExecuteAtomicCommit(AtomicCommitArgs &args) -> int; 64 auto ActivateDisplayUsingDPMS() -> int; 65 StopThread()66 void StopThread() { 67 { 68 const std::unique_lock lock(mutex_); 69 exit_thread_ = true; 70 } 71 cv_.notify_all(); 72 } 73 74 private: 75 DrmAtomicStateManager() = default; 76 auto CommitFrame(AtomicCommitArgs &args) -> int; 77 78 struct KmsState { 79 /* Required to cleanup unused planes */ 80 std::vector<std::shared_ptr<BindingOwner<DrmPlane>>> used_planes; 81 /* We have to hold a reference to framebuffer while displaying it , 82 * otherwise picture will blink */ 83 std::vector<std::shared_ptr<DrmFbIdHandle>> used_framebuffers; 84 85 DrmModeUserPropertyBlobUnique mode_blob; 86 DrmModeUserPropertyBlobUnique ctm_blob; 87 88 int release_fence_pt_index{}; 89 90 /* To avoid setting the inactive state twice, which will fail the commit */ 91 bool crtc_active_state{}; 92 } active_frame_state_; 93 94 auto NewFrameState() -> KmsState { 95 auto *prev_frame_state = &active_frame_state_; 96 return (KmsState){ 97 .used_planes = prev_frame_state->used_planes, 98 .crtc_active_state = prev_frame_state->crtc_active_state, 99 }; 100 } 101 102 DrmDisplayPipeline *pipe_{}; 103 104 void CleanupPriorFrameResources(); 105 106 KmsState staged_frame_state_; 107 SharedFd last_present_fence_; 108 int frames_staged_{}; 109 int frames_tracked_{}; 110 111 void ThreadFn(const std::shared_ptr<DrmAtomicStateManager> &dasm); 112 std::condition_variable cv_; 113 std::mutex mutex_; 114 bool exit_thread_{}; 115 }; 116 117 } // namespace android 118