1 /* 2 * Hisilicon Kirin SoCs drm master driver 3 * 4 * Copyright (c) 2016 Linaro Limited. 5 * Copyright (c) 2014-2016 Hisilicon Limited. 6 * 7 * Author: 8 * Xinliang Liu <z.liuxinliang@hisilicon.com> 9 * Xinliang Liu <xinliang.liu@linaro.org> 10 * Xinwei Kong <kong.kongxinwei@hisilicon.com> 11 * 12 * This program is free software; you can redistribute it and/or modify 13 * it under the terms of the GNU General Public License version 2 as 14 * published by the Free Software Foundation. 15 * 16 */ 17 18 #include <linux/of_platform.h> 19 #include <linux/component.h> 20 #include <linux/of_graph.h> 21 22 #include <drm/drmP.h> 23 #include <drm/drm_gem_cma_helper.h> 24 #include <drm/drm_fb_cma_helper.h> 25 #include <drm/drm_atomic_helper.h> 26 #include <drm/drm_crtc_helper.h> 27 #include <drm/drm_of.h> 28 29 #include "kirin_drm_drv.h" 30 31 static struct kirin_dc_ops *dc_ops; 32 33 static int kirin_drm_kms_cleanup(struct drm_device *dev) 34 { 35 struct kirin_drm_private *priv = dev->dev_private; 36 37 if (priv->fbdev) { 38 drm_fbdev_cma_fini(priv->fbdev); 39 priv->fbdev = NULL; 40 } 41 42 drm_kms_helper_poll_fini(dev); 43 dc_ops->cleanup(to_platform_device(dev->dev)); 44 drm_mode_config_cleanup(dev); 45 devm_kfree(dev->dev, priv); 46 dev->dev_private = NULL; 47 48 return 0; 49 } 50 51 static void kirin_fbdev_output_poll_changed(struct drm_device *dev) 52 { 53 struct kirin_drm_private *priv = dev->dev_private; 54 55 drm_fbdev_cma_hotplug_event(priv->fbdev); 56 } 57 58 static const struct drm_mode_config_funcs kirin_drm_mode_config_funcs = { 59 .fb_create = drm_fb_cma_create, 60 .output_poll_changed = kirin_fbdev_output_poll_changed, 61 .atomic_check = drm_atomic_helper_check, 62 .atomic_commit = drm_atomic_helper_commit, 63 }; 64 65 static void kirin_drm_mode_config_init(struct drm_device *dev) 66 { 67 dev->mode_config.min_width = 0; 68 dev->mode_config.min_height = 0; 69 70 dev->mode_config.max_width = 2048; 71 dev->mode_config.max_height = 2048; 72 73 dev->mode_config.funcs = &kirin_drm_mode_config_funcs; 74 } 75 76 static int kirin_drm_kms_init(struct drm_device *dev) 77 { 78 struct kirin_drm_private *priv; 79 int ret; 80 81 priv = devm_kzalloc(dev->dev, sizeof(*priv), GFP_KERNEL); 82 if (!priv) 83 return -ENOMEM; 84 85 dev->dev_private = priv; 86 dev_set_drvdata(dev->dev, dev); 87 88 /* dev->mode_config initialization */ 89 drm_mode_config_init(dev); 90 kirin_drm_mode_config_init(dev); 91 92 /* display controller init */ 93 ret = dc_ops->init(to_platform_device(dev->dev)); 94 if (ret) 95 goto err_mode_config_cleanup; 96 97 /* bind and init sub drivers */ 98 ret = component_bind_all(dev->dev, dev); 99 if (ret) { 100 DRM_ERROR("failed to bind all component.\n"); 101 goto err_dc_cleanup; 102 } 103 104 /* vblank init */ 105 ret = drm_vblank_init(dev, dev->mode_config.num_crtc); 106 if (ret) { 107 DRM_ERROR("failed to initialize vblank.\n"); 108 goto err_unbind_all; 109 } 110 /* with irq_enabled = true, we can use the vblank feature. */ 111 dev->irq_enabled = true; 112 113 /* reset all the states of crtc/plane/encoder/connector */ 114 drm_mode_config_reset(dev); 115 116 /* init kms poll for handling hpd */ 117 drm_kms_helper_poll_init(dev); 118 119 priv->fbdev = drm_fbdev_cma_init(dev, 32, 120 dev->mode_config.num_connector); 121 122 if (IS_ERR(priv->fbdev)) { 123 DRM_ERROR("failed to initialize fbdev.\n"); 124 ret = PTR_ERR(priv->fbdev); 125 goto err_cleanup_poll; 126 } 127 return 0; 128 129 err_cleanup_poll: 130 drm_kms_helper_poll_fini(dev); 131 err_unbind_all: 132 component_unbind_all(dev->dev, dev); 133 err_dc_cleanup: 134 dc_ops->cleanup(to_platform_device(dev->dev)); 135 err_mode_config_cleanup: 136 drm_mode_config_cleanup(dev); 137 devm_kfree(dev->dev, priv); 138 dev->dev_private = NULL; 139 140 return ret; 141 } 142 143 DEFINE_DRM_GEM_CMA_FOPS(kirin_drm_fops); 144 145 static int kirin_gem_cma_dumb_create(struct drm_file *file, 146 struct drm_device *dev, 147 struct drm_mode_create_dumb *args) 148 { 149 return drm_gem_cma_dumb_create_internal(file, dev, args); 150 } 151 152 static struct drm_driver kirin_drm_driver = { 153 .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_PRIME | 154 DRIVER_ATOMIC, 155 .fops = &kirin_drm_fops, 156 157 .gem_free_object_unlocked = drm_gem_cma_free_object, 158 .gem_vm_ops = &drm_gem_cma_vm_ops, 159 .dumb_create = kirin_gem_cma_dumb_create, 160 161 .prime_handle_to_fd = drm_gem_prime_handle_to_fd, 162 .prime_fd_to_handle = drm_gem_prime_fd_to_handle, 163 .gem_prime_export = drm_gem_prime_export, 164 .gem_prime_import = drm_gem_prime_import, 165 .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table, 166 .gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table, 167 .gem_prime_vmap = drm_gem_cma_prime_vmap, 168 .gem_prime_vunmap = drm_gem_cma_prime_vunmap, 169 .gem_prime_mmap = drm_gem_cma_prime_mmap, 170 171 .name = "kirin", 172 .desc = "Hisilicon Kirin SoCs' DRM Driver", 173 .date = "20150718", 174 .major = 1, 175 .minor = 0, 176 }; 177 178 static int compare_of(struct device *dev, void *data) 179 { 180 return dev->of_node == data; 181 } 182 183 static int kirin_drm_bind(struct device *dev) 184 { 185 struct drm_driver *driver = &kirin_drm_driver; 186 struct drm_device *drm_dev; 187 int ret; 188 189 drm_dev = drm_dev_alloc(driver, dev); 190 if (IS_ERR(drm_dev)) 191 return PTR_ERR(drm_dev); 192 193 ret = kirin_drm_kms_init(drm_dev); 194 if (ret) 195 goto err_drm_dev_unref; 196 197 ret = drm_dev_register(drm_dev, 0); 198 if (ret) 199 goto err_kms_cleanup; 200 201 return 0; 202 203 err_kms_cleanup: 204 kirin_drm_kms_cleanup(drm_dev); 205 err_drm_dev_unref: 206 drm_dev_unref(drm_dev); 207 208 return ret; 209 } 210 211 static void kirin_drm_unbind(struct device *dev) 212 { 213 struct drm_device *drm_dev = dev_get_drvdata(dev); 214 215 drm_dev_unregister(drm_dev); 216 kirin_drm_kms_cleanup(drm_dev); 217 drm_dev_unref(drm_dev); 218 } 219 220 static const struct component_master_ops kirin_drm_ops = { 221 .bind = kirin_drm_bind, 222 .unbind = kirin_drm_unbind, 223 }; 224 225 static int kirin_drm_platform_probe(struct platform_device *pdev) 226 { 227 struct device *dev = &pdev->dev; 228 struct device_node *np = dev->of_node; 229 struct component_match *match = NULL; 230 struct device_node *remote; 231 232 dc_ops = (struct kirin_dc_ops *)of_device_get_match_data(dev); 233 if (!dc_ops) { 234 DRM_ERROR("failed to get dt id data\n"); 235 return -EINVAL; 236 } 237 238 remote = of_graph_get_remote_node(np, 0, 0); 239 if (IS_ERR(remote)) 240 return PTR_ERR(remote); 241 242 drm_of_component_match_add(dev, &match, compare_of, remote); 243 of_node_put(remote); 244 245 return component_master_add_with_match(dev, &kirin_drm_ops, match); 246 247 return 0; 248 } 249 250 static int kirin_drm_platform_remove(struct platform_device *pdev) 251 { 252 component_master_del(&pdev->dev, &kirin_drm_ops); 253 dc_ops = NULL; 254 return 0; 255 } 256 257 static const struct of_device_id kirin_drm_dt_ids[] = { 258 { .compatible = "hisilicon,hi6220-ade", 259 .data = &ade_dc_ops, 260 }, 261 { /* end node */ }, 262 }; 263 MODULE_DEVICE_TABLE(of, kirin_drm_dt_ids); 264 265 static struct platform_driver kirin_drm_platform_driver = { 266 .probe = kirin_drm_platform_probe, 267 .remove = kirin_drm_platform_remove, 268 .driver = { 269 .name = "kirin-drm", 270 .of_match_table = kirin_drm_dt_ids, 271 }, 272 }; 273 274 module_platform_driver(kirin_drm_platform_driver); 275 276 MODULE_AUTHOR("Xinliang Liu <xinliang.liu@linaro.org>"); 277 MODULE_AUTHOR("Xinliang Liu <z.liuxinliang@hisilicon.com>"); 278 MODULE_AUTHOR("Xinwei Kong <kong.kongxinwei@hisilicon.com>"); 279 MODULE_DESCRIPTION("hisilicon Kirin SoCs' DRM master driver"); 280 MODULE_LICENSE("GPL v2"); 281