1 /* 2 * Copyright (C) 2017 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 <stddef.h> 20 #include <stdint.h> 21 22 #include <memory> 23 24 #include <xf86drmMode.h> 25 26 #include "graphics.h" 27 #include "minui/minui.h" 28 29 class GRSurfaceDrm : public GRSurface { 30 public: 31 ~GRSurfaceDrm() override; 32 33 // Creates a GRSurfaceDrm instance. 34 static std::unique_ptr<GRSurfaceDrm> Create(int drm_fd, int width, int height); 35 data()36 uint8_t* data() override { 37 return mmapped_buffer_; 38 } 39 40 private: 41 friend class MinuiBackendDrm; 42 GRSurfaceDrm(size_t width,size_t height,size_t row_bytes,size_t pixel_bytes,int drm_fd,uint32_t handle)43 GRSurfaceDrm(size_t width, size_t height, size_t row_bytes, size_t pixel_bytes, int drm_fd, 44 uint32_t handle) 45 : GRSurface(width, height, row_bytes, pixel_bytes), drm_fd_(drm_fd), handle(handle) {} 46 47 const int drm_fd_; 48 49 uint32_t fb_id{ 0 }; 50 uint32_t handle{ 0 }; 51 uint8_t* mmapped_buffer_{ nullptr }; 52 }; 53 54 class MinuiBackendDrm : public MinuiBackend { 55 public: 56 MinuiBackendDrm() = default; 57 ~MinuiBackendDrm() override; 58 59 GRSurface* Init() override; 60 GRSurface* Flip() override; 61 void Blank(bool) override; 62 63 private: 64 void DrmDisableCrtc(int drm_fd, drmModeCrtc* crtc); 65 bool DrmEnableCrtc(int drm_fd, drmModeCrtc* crtc, const std::unique_ptr<GRSurfaceDrm>& surface); 66 void DisableNonMainCrtcs(int fd, drmModeRes* resources, drmModeCrtc* main_crtc); 67 drmModeConnector* FindMainMonitor(int fd, drmModeRes* resources, uint32_t* mode_index); 68 69 std::unique_ptr<GRSurfaceDrm> GRSurfaceDrms[2]; 70 int current_buffer{ 0 }; 71 drmModeCrtc* main_monitor_crtc{ nullptr }; 72 drmModeConnector* main_monitor_connector{ nullptr }; 73 int drm_fd{ -1 }; 74 }; 75