1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Copyright (C) 2020 Unisoc Inc. 4 */ 5 6 #include <linux/component.h> 7 #include <linux/dma-mapping.h> 8 #include <linux/module.h> 9 #include <linux/mutex.h> 10 #include <linux/of_graph.h> 11 #include <linux/of_platform.h> 12 13 #include <drm/drm_atomic_helper.h> 14 #include <drm/drm_crtc_helper.h> 15 #include <drm/drm_drv.h> 16 #include <drm/drm_gem_cma_helper.h> 17 #include <drm/drm_gem_framebuffer_helper.h> 18 #include <drm/drm_of.h> 19 #include <drm/drm_probe_helper.h> 20 #include <drm/drm_vblank.h> 21 22 #include "sprd_drm.h" 23 24 #define DRIVER_NAME "sprd" 25 #define DRIVER_DESC "Spreadtrum SoCs' DRM Driver" 26 #define DRIVER_DATE "20200201" 27 #define DRIVER_MAJOR 1 28 #define DRIVER_MINOR 0 29 30 static const struct drm_mode_config_helper_funcs sprd_drm_mode_config_helper = { 31 .atomic_commit_tail = drm_atomic_helper_commit_tail_rpm, 32 }; 33 34 static const struct drm_mode_config_funcs sprd_drm_mode_config_funcs = { 35 .fb_create = drm_gem_fb_create, 36 .atomic_check = drm_atomic_helper_check, 37 .atomic_commit = drm_atomic_helper_commit, 38 }; 39 40 static void sprd_drm_mode_config_init(struct drm_device *drm) 41 { 42 drm->mode_config.min_width = 0; 43 drm->mode_config.min_height = 0; 44 drm->mode_config.max_width = 8192; 45 drm->mode_config.max_height = 8192; 46 drm->mode_config.allow_fb_modifiers = true; 47 48 drm->mode_config.funcs = &sprd_drm_mode_config_funcs; 49 drm->mode_config.helper_private = &sprd_drm_mode_config_helper; 50 } 51 52 DEFINE_DRM_GEM_CMA_FOPS(sprd_drm_fops); 53 54 static struct drm_driver sprd_drm_drv = { 55 .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC, 56 .fops = &sprd_drm_fops, 57 58 /* GEM Operations */ 59 DRM_GEM_CMA_DRIVER_OPS, 60 61 .name = DRIVER_NAME, 62 .desc = DRIVER_DESC, 63 .date = DRIVER_DATE, 64 .major = DRIVER_MAJOR, 65 .minor = DRIVER_MINOR, 66 }; 67 68 static int sprd_drm_bind(struct device *dev) 69 { 70 struct platform_device *pdev = to_platform_device(dev); 71 struct drm_device *drm; 72 struct sprd_drm *sprd; 73 int ret; 74 75 sprd = devm_drm_dev_alloc(dev, &sprd_drm_drv, struct sprd_drm, drm); 76 if (IS_ERR(sprd)) 77 return PTR_ERR(sprd); 78 79 drm = &sprd->drm; 80 platform_set_drvdata(pdev, drm); 81 82 ret = drmm_mode_config_init(drm); 83 if (ret) 84 return ret; 85 86 sprd_drm_mode_config_init(drm); 87 88 /* bind and init sub drivers */ 89 ret = component_bind_all(drm->dev, drm); 90 if (ret) { 91 drm_err(drm, "failed to bind all component.\n"); 92 return ret; 93 } 94 95 /* vblank init */ 96 ret = drm_vblank_init(drm, drm->mode_config.num_crtc); 97 if (ret) { 98 drm_err(drm, "failed to initialize vblank.\n"); 99 goto err_unbind_all; 100 } 101 102 /* reset all the states of crtc/plane/encoder/connector */ 103 drm_mode_config_reset(drm); 104 105 /* init kms poll for handling hpd */ 106 drm_kms_helper_poll_init(drm); 107 108 ret = drm_dev_register(drm, 0); 109 if (ret < 0) 110 goto err_kms_helper_poll_fini; 111 112 return 0; 113 114 err_kms_helper_poll_fini: 115 drm_kms_helper_poll_fini(drm); 116 err_unbind_all: 117 component_unbind_all(drm->dev, drm); 118 return ret; 119 } 120 121 static void sprd_drm_unbind(struct device *dev) 122 { 123 struct drm_device *drm = dev_get_drvdata(dev); 124 125 drm_dev_unregister(drm); 126 127 drm_kms_helper_poll_fini(drm); 128 129 component_unbind_all(drm->dev, drm); 130 } 131 132 static const struct component_master_ops drm_component_ops = { 133 .bind = sprd_drm_bind, 134 .unbind = sprd_drm_unbind, 135 }; 136 137 static int compare_of(struct device *dev, void *data) 138 { 139 return dev->of_node == data; 140 } 141 142 static int sprd_drm_probe(struct platform_device *pdev) 143 { 144 return drm_of_component_probe(&pdev->dev, compare_of, &drm_component_ops); 145 } 146 147 static int sprd_drm_remove(struct platform_device *pdev) 148 { 149 component_master_del(&pdev->dev, &drm_component_ops); 150 return 0; 151 } 152 153 static void sprd_drm_shutdown(struct platform_device *pdev) 154 { 155 struct drm_device *drm = platform_get_drvdata(pdev); 156 157 if (!drm) { 158 drm_warn(drm, "drm device is not available, no shutdown\n"); 159 return; 160 } 161 162 drm_atomic_helper_shutdown(drm); 163 } 164 165 static const struct of_device_id drm_match_table[] = { 166 { .compatible = "sprd,display-subsystem", }, 167 { /* sentinel */ }, 168 }; 169 MODULE_DEVICE_TABLE(of, drm_match_table); 170 171 static struct platform_driver sprd_drm_driver = { 172 .probe = sprd_drm_probe, 173 .remove = sprd_drm_remove, 174 .shutdown = sprd_drm_shutdown, 175 .driver = { 176 .name = "sprd-drm-drv", 177 .of_match_table = drm_match_table, 178 }, 179 }; 180 181 static struct platform_driver *sprd_drm_drivers[] = { 182 &sprd_drm_driver, 183 &sprd_dpu_driver, 184 &sprd_dsi_driver, 185 }; 186 187 static int __init sprd_drm_init(void) 188 { 189 return platform_register_drivers(sprd_drm_drivers, 190 ARRAY_SIZE(sprd_drm_drivers)); 191 } 192 193 static void __exit sprd_drm_exit(void) 194 { 195 platform_unregister_drivers(sprd_drm_drivers, 196 ARRAY_SIZE(sprd_drm_drivers)); 197 } 198 199 module_init(sprd_drm_init); 200 module_exit(sprd_drm_exit); 201 202 MODULE_AUTHOR("Leon He <leon.he@unisoc.com>"); 203 MODULE_AUTHOR("Kevin Tang <kevin.tang@unisoc.com>"); 204 MODULE_DESCRIPTION("Unisoc DRM KMS Master Driver"); 205 MODULE_LICENSE("GPL v2"); 206