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 28 #include "kirin_drm_drv.h" 29 30 static struct kirin_dc_ops *dc_ops; 31 32 static int kirin_drm_kms_cleanup(struct drm_device *dev) 33 { 34 struct kirin_drm_private *priv = dev->dev_private; 35 36 #ifdef CONFIG_DRM_FBDEV_EMULATION 37 if (priv->fbdev) { 38 drm_fbdev_cma_fini(priv->fbdev); 39 priv->fbdev = NULL; 40 } 41 #endif 42 drm_kms_helper_poll_fini(dev); 43 drm_vblank_cleanup(dev); 44 dc_ops->cleanup(dev); 45 drm_mode_config_cleanup(dev); 46 devm_kfree(dev->dev, priv); 47 dev->dev_private = NULL; 48 49 return 0; 50 } 51 52 #ifdef CONFIG_DRM_FBDEV_EMULATION 53 static void kirin_fbdev_output_poll_changed(struct drm_device *dev) 54 { 55 struct kirin_drm_private *priv = dev->dev_private; 56 57 if (priv->fbdev) { 58 drm_fbdev_cma_hotplug_event(priv->fbdev); 59 } else { 60 priv->fbdev = drm_fbdev_cma_init(dev, 32, 61 dev->mode_config.num_crtc, 62 dev->mode_config.num_connector); 63 if (IS_ERR(priv->fbdev)) 64 priv->fbdev = NULL; 65 } 66 } 67 #endif 68 69 static const struct drm_mode_config_funcs kirin_drm_mode_config_funcs = { 70 .fb_create = drm_fb_cma_create, 71 #ifdef CONFIG_DRM_FBDEV_EMULATION 72 .output_poll_changed = kirin_fbdev_output_poll_changed, 73 #endif 74 .atomic_check = drm_atomic_helper_check, 75 .atomic_commit = drm_atomic_helper_commit, 76 }; 77 78 static void kirin_drm_mode_config_init(struct drm_device *dev) 79 { 80 dev->mode_config.min_width = 0; 81 dev->mode_config.min_height = 0; 82 83 dev->mode_config.max_width = 2048; 84 dev->mode_config.max_height = 2048; 85 86 dev->mode_config.funcs = &kirin_drm_mode_config_funcs; 87 } 88 89 static int kirin_drm_kms_init(struct drm_device *dev) 90 { 91 struct kirin_drm_private *priv; 92 int ret; 93 94 priv = devm_kzalloc(dev->dev, sizeof(*priv), GFP_KERNEL); 95 if (!priv) 96 return -ENOMEM; 97 98 dev->dev_private = priv; 99 dev_set_drvdata(dev->dev, dev); 100 101 /* dev->mode_config initialization */ 102 drm_mode_config_init(dev); 103 kirin_drm_mode_config_init(dev); 104 105 /* display controller init */ 106 ret = dc_ops->init(dev); 107 if (ret) 108 goto err_mode_config_cleanup; 109 110 /* bind and init sub drivers */ 111 ret = component_bind_all(dev->dev, dev); 112 if (ret) { 113 DRM_ERROR("failed to bind all component.\n"); 114 goto err_dc_cleanup; 115 } 116 117 /* vblank init */ 118 ret = drm_vblank_init(dev, dev->mode_config.num_crtc); 119 if (ret) { 120 DRM_ERROR("failed to initialize vblank.\n"); 121 goto err_unbind_all; 122 } 123 /* with irq_enabled = true, we can use the vblank feature. */ 124 dev->irq_enabled = true; 125 126 /* reset all the states of crtc/plane/encoder/connector */ 127 drm_mode_config_reset(dev); 128 129 /* init kms poll for handling hpd */ 130 drm_kms_helper_poll_init(dev); 131 132 /* force detection after connectors init */ 133 (void)drm_helper_hpd_irq_event(dev); 134 135 return 0; 136 137 err_unbind_all: 138 component_unbind_all(dev->dev, dev); 139 err_dc_cleanup: 140 dc_ops->cleanup(dev); 141 err_mode_config_cleanup: 142 drm_mode_config_cleanup(dev); 143 devm_kfree(dev->dev, priv); 144 dev->dev_private = NULL; 145 146 return ret; 147 } 148 149 static const struct file_operations kirin_drm_fops = { 150 .owner = THIS_MODULE, 151 .open = drm_open, 152 .release = drm_release, 153 .unlocked_ioctl = drm_ioctl, 154 #ifdef CONFIG_COMPAT 155 .compat_ioctl = drm_compat_ioctl, 156 #endif 157 .poll = drm_poll, 158 .read = drm_read, 159 .llseek = no_llseek, 160 .mmap = drm_gem_cma_mmap, 161 }; 162 163 static int kirin_gem_cma_dumb_create(struct drm_file *file, 164 struct drm_device *dev, 165 struct drm_mode_create_dumb *args) 166 { 167 return drm_gem_cma_dumb_create_internal(file, dev, args); 168 } 169 170 static struct drm_driver kirin_drm_driver = { 171 .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_PRIME | 172 DRIVER_ATOMIC | DRIVER_HAVE_IRQ, 173 .fops = &kirin_drm_fops, 174 175 .gem_free_object_unlocked = drm_gem_cma_free_object, 176 .gem_vm_ops = &drm_gem_cma_vm_ops, 177 .dumb_create = kirin_gem_cma_dumb_create, 178 .dumb_map_offset = drm_gem_cma_dumb_map_offset, 179 .dumb_destroy = drm_gem_dumb_destroy, 180 181 .prime_handle_to_fd = drm_gem_prime_handle_to_fd, 182 .prime_fd_to_handle = drm_gem_prime_fd_to_handle, 183 .gem_prime_export = drm_gem_prime_export, 184 .gem_prime_import = drm_gem_prime_import, 185 .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table, 186 .gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table, 187 .gem_prime_vmap = drm_gem_cma_prime_vmap, 188 .gem_prime_vunmap = drm_gem_cma_prime_vunmap, 189 .gem_prime_mmap = drm_gem_cma_prime_mmap, 190 191 .name = "kirin", 192 .desc = "Hisilicon Kirin SoCs' DRM Driver", 193 .date = "20150718", 194 .major = 1, 195 .minor = 0, 196 }; 197 198 static int compare_of(struct device *dev, void *data) 199 { 200 return dev->of_node == data; 201 } 202 203 static int kirin_drm_bind(struct device *dev) 204 { 205 struct drm_driver *driver = &kirin_drm_driver; 206 struct drm_device *drm_dev; 207 int ret; 208 209 drm_dev = drm_dev_alloc(driver, dev); 210 if (!drm_dev) 211 return -ENOMEM; 212 213 drm_dev->platformdev = to_platform_device(dev); 214 215 ret = kirin_drm_kms_init(drm_dev); 216 if (ret) 217 goto err_drm_dev_unref; 218 219 ret = drm_dev_register(drm_dev, 0); 220 if (ret) 221 goto err_kms_cleanup; 222 223 DRM_INFO("Initialized %s %d.%d.%d %s on minor %d\n", 224 driver->name, driver->major, driver->minor, driver->patchlevel, 225 driver->date, drm_dev->primary->index); 226 227 return 0; 228 229 err_kms_cleanup: 230 kirin_drm_kms_cleanup(drm_dev); 231 err_drm_dev_unref: 232 drm_dev_unref(drm_dev); 233 234 return ret; 235 } 236 237 static void kirin_drm_unbind(struct device *dev) 238 { 239 struct drm_device *drm_dev = dev_get_drvdata(dev); 240 241 drm_dev_unregister(drm_dev); 242 kirin_drm_kms_cleanup(drm_dev); 243 drm_dev_unref(drm_dev); 244 } 245 246 static const struct component_master_ops kirin_drm_ops = { 247 .bind = kirin_drm_bind, 248 .unbind = kirin_drm_unbind, 249 }; 250 251 static struct device_node *kirin_get_remote_node(struct device_node *np) 252 { 253 struct device_node *endpoint, *remote; 254 255 /* get the first endpoint, in our case only one remote node 256 * is connected to display controller. 257 */ 258 endpoint = of_graph_get_next_endpoint(np, NULL); 259 if (!endpoint) { 260 DRM_ERROR("no valid endpoint node\n"); 261 return ERR_PTR(-ENODEV); 262 } 263 of_node_put(endpoint); 264 265 remote = of_graph_get_remote_port_parent(endpoint); 266 if (!remote) { 267 DRM_ERROR("no valid remote node\n"); 268 return ERR_PTR(-ENODEV); 269 } 270 of_node_put(remote); 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 component_match_add(dev, &match, compare_of, remote); 298 299 return component_master_add_with_match(dev, &kirin_drm_ops, match); 300 301 return 0; 302 } 303 304 static int kirin_drm_platform_remove(struct platform_device *pdev) 305 { 306 component_master_del(&pdev->dev, &kirin_drm_ops); 307 dc_ops = NULL; 308 return 0; 309 } 310 311 static const struct of_device_id kirin_drm_dt_ids[] = { 312 { .compatible = "hisilicon,hi6220-ade", 313 .data = &ade_dc_ops, 314 }, 315 { /* end node */ }, 316 }; 317 MODULE_DEVICE_TABLE(of, kirin_drm_dt_ids); 318 319 static struct platform_driver kirin_drm_platform_driver = { 320 .probe = kirin_drm_platform_probe, 321 .remove = kirin_drm_platform_remove, 322 .driver = { 323 .name = "kirin-drm", 324 .of_match_table = kirin_drm_dt_ids, 325 }, 326 }; 327 328 module_platform_driver(kirin_drm_platform_driver); 329 330 MODULE_AUTHOR("Xinliang Liu <xinliang.liu@linaro.org>"); 331 MODULE_AUTHOR("Xinliang Liu <z.liuxinliang@hisilicon.com>"); 332 MODULE_AUTHOR("Xinwei Kong <kong.kongxinwei@hisilicon.com>"); 333 MODULE_DESCRIPTION("hisilicon Kirin SoCs' DRM master driver"); 334 MODULE_LICENSE("GPL v2"); 335