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 #ifdef CONFIG_DRM_FBDEV_EMULATION 38 if (priv->fbdev) { 39 drm_fbdev_cma_fini(priv->fbdev); 40 priv->fbdev = NULL; 41 } 42 #endif 43 drm_kms_helper_poll_fini(dev); 44 drm_vblank_cleanup(dev); 45 dc_ops->cleanup(dev); 46 drm_mode_config_cleanup(dev); 47 devm_kfree(dev->dev, priv); 48 dev->dev_private = NULL; 49 50 return 0; 51 } 52 53 #ifdef CONFIG_DRM_FBDEV_EMULATION 54 static void kirin_fbdev_output_poll_changed(struct drm_device *dev) 55 { 56 struct kirin_drm_private *priv = dev->dev_private; 57 58 if (priv->fbdev) { 59 drm_fbdev_cma_hotplug_event(priv->fbdev); 60 } else { 61 priv->fbdev = drm_fbdev_cma_init(dev, 32, 62 dev->mode_config.num_crtc, 63 dev->mode_config.num_connector); 64 if (IS_ERR(priv->fbdev)) 65 priv->fbdev = NULL; 66 } 67 } 68 #endif 69 70 static const struct drm_mode_config_funcs kirin_drm_mode_config_funcs = { 71 .fb_create = drm_fb_cma_create, 72 #ifdef CONFIG_DRM_FBDEV_EMULATION 73 .output_poll_changed = kirin_fbdev_output_poll_changed, 74 #endif 75 .atomic_check = drm_atomic_helper_check, 76 .atomic_commit = drm_atomic_helper_commit, 77 }; 78 79 static void kirin_drm_mode_config_init(struct drm_device *dev) 80 { 81 dev->mode_config.min_width = 0; 82 dev->mode_config.min_height = 0; 83 84 dev->mode_config.max_width = 2048; 85 dev->mode_config.max_height = 2048; 86 87 dev->mode_config.funcs = &kirin_drm_mode_config_funcs; 88 } 89 90 static int kirin_drm_kms_init(struct drm_device *dev) 91 { 92 struct kirin_drm_private *priv; 93 int ret; 94 95 priv = devm_kzalloc(dev->dev, sizeof(*priv), GFP_KERNEL); 96 if (!priv) 97 return -ENOMEM; 98 99 dev->dev_private = priv; 100 dev_set_drvdata(dev->dev, dev); 101 102 /* dev->mode_config initialization */ 103 drm_mode_config_init(dev); 104 kirin_drm_mode_config_init(dev); 105 106 /* display controller init */ 107 ret = dc_ops->init(dev); 108 if (ret) 109 goto err_mode_config_cleanup; 110 111 /* bind and init sub drivers */ 112 ret = component_bind_all(dev->dev, dev); 113 if (ret) { 114 DRM_ERROR("failed to bind all component.\n"); 115 goto err_dc_cleanup; 116 } 117 118 /* vblank init */ 119 ret = drm_vblank_init(dev, dev->mode_config.num_crtc); 120 if (ret) { 121 DRM_ERROR("failed to initialize vblank.\n"); 122 goto err_unbind_all; 123 } 124 /* with irq_enabled = true, we can use the vblank feature. */ 125 dev->irq_enabled = true; 126 127 /* reset all the states of crtc/plane/encoder/connector */ 128 drm_mode_config_reset(dev); 129 130 /* init kms poll for handling hpd */ 131 drm_kms_helper_poll_init(dev); 132 133 /* force detection after connectors init */ 134 (void)drm_helper_hpd_irq_event(dev); 135 136 return 0; 137 138 err_unbind_all: 139 component_unbind_all(dev->dev, dev); 140 err_dc_cleanup: 141 dc_ops->cleanup(dev); 142 err_mode_config_cleanup: 143 drm_mode_config_cleanup(dev); 144 devm_kfree(dev->dev, priv); 145 dev->dev_private = NULL; 146 147 return ret; 148 } 149 150 static const struct file_operations kirin_drm_fops = { 151 .owner = THIS_MODULE, 152 .open = drm_open, 153 .release = drm_release, 154 .unlocked_ioctl = drm_ioctl, 155 #ifdef CONFIG_COMPAT 156 .compat_ioctl = drm_compat_ioctl, 157 #endif 158 .poll = drm_poll, 159 .read = drm_read, 160 .llseek = no_llseek, 161 .mmap = drm_gem_cma_mmap, 162 }; 163 164 static int kirin_gem_cma_dumb_create(struct drm_file *file, 165 struct drm_device *dev, 166 struct drm_mode_create_dumb *args) 167 { 168 return drm_gem_cma_dumb_create_internal(file, dev, args); 169 } 170 171 static struct drm_driver kirin_drm_driver = { 172 .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_PRIME | 173 DRIVER_ATOMIC, 174 .fops = &kirin_drm_fops, 175 176 .gem_free_object_unlocked = drm_gem_cma_free_object, 177 .gem_vm_ops = &drm_gem_cma_vm_ops, 178 .dumb_create = kirin_gem_cma_dumb_create, 179 .dumb_map_offset = drm_gem_cma_dumb_map_offset, 180 .dumb_destroy = drm_gem_dumb_destroy, 181 182 .prime_handle_to_fd = drm_gem_prime_handle_to_fd, 183 .prime_fd_to_handle = drm_gem_prime_fd_to_handle, 184 .gem_prime_export = drm_gem_prime_export, 185 .gem_prime_import = drm_gem_prime_import, 186 .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table, 187 .gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table, 188 .gem_prime_vmap = drm_gem_cma_prime_vmap, 189 .gem_prime_vunmap = drm_gem_cma_prime_vunmap, 190 .gem_prime_mmap = drm_gem_cma_prime_mmap, 191 192 .name = "kirin", 193 .desc = "Hisilicon Kirin SoCs' DRM Driver", 194 .date = "20150718", 195 .major = 1, 196 .minor = 0, 197 }; 198 199 static int compare_of(struct device *dev, void *data) 200 { 201 return dev->of_node == data; 202 } 203 204 static int kirin_drm_bind(struct device *dev) 205 { 206 struct drm_driver *driver = &kirin_drm_driver; 207 struct drm_device *drm_dev; 208 int ret; 209 210 drm_dev = drm_dev_alloc(driver, dev); 211 if (IS_ERR(drm_dev)) 212 return PTR_ERR(drm_dev); 213 214 drm_dev->platformdev = to_platform_device(dev); 215 216 ret = kirin_drm_kms_init(drm_dev); 217 if (ret) 218 goto err_drm_dev_unref; 219 220 ret = drm_dev_register(drm_dev, 0); 221 if (ret) 222 goto err_kms_cleanup; 223 224 DRM_INFO("Initialized %s %d.%d.%d %s on minor %d\n", 225 driver->name, driver->major, driver->minor, driver->patchlevel, 226 driver->date, drm_dev->primary->index); 227 228 return 0; 229 230 err_kms_cleanup: 231 kirin_drm_kms_cleanup(drm_dev); 232 err_drm_dev_unref: 233 drm_dev_unref(drm_dev); 234 235 return ret; 236 } 237 238 static void kirin_drm_unbind(struct device *dev) 239 { 240 struct drm_device *drm_dev = dev_get_drvdata(dev); 241 242 drm_dev_unregister(drm_dev); 243 kirin_drm_kms_cleanup(drm_dev); 244 drm_dev_unref(drm_dev); 245 } 246 247 static const struct component_master_ops kirin_drm_ops = { 248 .bind = kirin_drm_bind, 249 .unbind = kirin_drm_unbind, 250 }; 251 252 static struct device_node *kirin_get_remote_node(struct device_node *np) 253 { 254 struct device_node *endpoint, *remote; 255 256 /* get the first endpoint, in our case only one remote node 257 * is connected to display controller. 258 */ 259 endpoint = of_graph_get_next_endpoint(np, NULL); 260 if (!endpoint) { 261 DRM_ERROR("no valid endpoint node\n"); 262 return ERR_PTR(-ENODEV); 263 } 264 265 remote = of_graph_get_remote_port_parent(endpoint); 266 of_node_put(endpoint); 267 if (!remote) { 268 DRM_ERROR("no valid remote node\n"); 269 return ERR_PTR(-ENODEV); 270 } 271 272 if (!of_device_is_available(remote)) { 273 DRM_ERROR("not available for remote node\n"); 274 return ERR_PTR(-ENODEV); 275 } 276 277 return remote; 278 } 279 280 static int kirin_drm_platform_probe(struct platform_device *pdev) 281 { 282 struct device *dev = &pdev->dev; 283 struct device_node *np = dev->of_node; 284 struct component_match *match = NULL; 285 struct device_node *remote; 286 287 dc_ops = (struct kirin_dc_ops *)of_device_get_match_data(dev); 288 if (!dc_ops) { 289 DRM_ERROR("failed to get dt id data\n"); 290 return -EINVAL; 291 } 292 293 remote = kirin_get_remote_node(np); 294 if (IS_ERR(remote)) 295 return PTR_ERR(remote); 296 297 drm_of_component_match_add(dev, &match, compare_of, remote); 298 of_node_put(remote); 299 300 return component_master_add_with_match(dev, &kirin_drm_ops, match); 301 302 return 0; 303 } 304 305 static int kirin_drm_platform_remove(struct platform_device *pdev) 306 { 307 component_master_del(&pdev->dev, &kirin_drm_ops); 308 dc_ops = NULL; 309 return 0; 310 } 311 312 static const struct of_device_id kirin_drm_dt_ids[] = { 313 { .compatible = "hisilicon,hi6220-ade", 314 .data = &ade_dc_ops, 315 }, 316 { /* end node */ }, 317 }; 318 MODULE_DEVICE_TABLE(of, kirin_drm_dt_ids); 319 320 static struct platform_driver kirin_drm_platform_driver = { 321 .probe = kirin_drm_platform_probe, 322 .remove = kirin_drm_platform_remove, 323 .driver = { 324 .name = "kirin-drm", 325 .of_match_table = kirin_drm_dt_ids, 326 }, 327 }; 328 329 module_platform_driver(kirin_drm_platform_driver); 330 331 MODULE_AUTHOR("Xinliang Liu <xinliang.liu@linaro.org>"); 332 MODULE_AUTHOR("Xinliang Liu <z.liuxinliang@hisilicon.com>"); 333 MODULE_AUTHOR("Xinwei Kong <kong.kongxinwei@hisilicon.com>"); 334 MODULE_DESCRIPTION("hisilicon Kirin SoCs' DRM master driver"); 335 MODULE_LICENSE("GPL v2"); 336