1 /* 2 * Copyright (C) 2012 Russell King 3 * 4 * This program is free software; you can redistribute it and/or modify 5 * it under the terms of the GNU General Public License version 2 as 6 * published by the Free Software Foundation. 7 */ 8 #include <linux/clk.h> 9 #include <linux/component.h> 10 #include <linux/module.h> 11 #include <linux/of_graph.h> 12 #include <drm/drmP.h> 13 #include <drm/drm_crtc_helper.h> 14 #include <drm/drm_of.h> 15 #include "armada_crtc.h" 16 #include "armada_drm.h" 17 #include "armada_gem.h" 18 #include "armada_hw.h" 19 #include <drm/armada_drm.h> 20 #include "armada_ioctlP.h" 21 22 static void armada_drm_unref_work(struct work_struct *work) 23 { 24 struct armada_private *priv = 25 container_of(work, struct armada_private, fb_unref_work); 26 struct drm_framebuffer *fb; 27 28 while (kfifo_get(&priv->fb_unref, &fb)) 29 drm_framebuffer_unreference(fb); 30 } 31 32 /* Must be called with dev->event_lock held */ 33 void __armada_drm_queue_unref_work(struct drm_device *dev, 34 struct drm_framebuffer *fb) 35 { 36 struct armada_private *priv = dev->dev_private; 37 38 WARN_ON(!kfifo_put(&priv->fb_unref, fb)); 39 schedule_work(&priv->fb_unref_work); 40 } 41 42 void armada_drm_queue_unref_work(struct drm_device *dev, 43 struct drm_framebuffer *fb) 44 { 45 unsigned long flags; 46 47 spin_lock_irqsave(&dev->event_lock, flags); 48 __armada_drm_queue_unref_work(dev, fb); 49 spin_unlock_irqrestore(&dev->event_lock, flags); 50 } 51 52 static int armada_drm_load(struct drm_device *dev, unsigned long flags) 53 { 54 struct armada_private *priv; 55 struct resource *mem = NULL; 56 int ret, n; 57 58 for (n = 0; ; n++) { 59 struct resource *r = platform_get_resource(dev->platformdev, 60 IORESOURCE_MEM, n); 61 if (!r) 62 break; 63 64 /* Resources above 64K are graphics memory */ 65 if (resource_size(r) > SZ_64K) 66 mem = r; 67 else 68 return -EINVAL; 69 } 70 71 if (!mem) 72 return -ENXIO; 73 74 if (!devm_request_mem_region(dev->dev, mem->start, 75 resource_size(mem), "armada-drm")) 76 return -EBUSY; 77 78 priv = devm_kzalloc(dev->dev, sizeof(*priv), GFP_KERNEL); 79 if (!priv) { 80 DRM_ERROR("failed to allocate private\n"); 81 return -ENOMEM; 82 } 83 84 platform_set_drvdata(dev->platformdev, dev); 85 dev->dev_private = priv; 86 87 INIT_WORK(&priv->fb_unref_work, armada_drm_unref_work); 88 INIT_KFIFO(priv->fb_unref); 89 90 /* Mode setting support */ 91 drm_mode_config_init(dev); 92 dev->mode_config.min_width = 320; 93 dev->mode_config.min_height = 200; 94 95 /* 96 * With vscale enabled, the maximum width is 1920 due to the 97 * 1920 by 3 lines RAM 98 */ 99 dev->mode_config.max_width = 1920; 100 dev->mode_config.max_height = 2048; 101 102 dev->mode_config.preferred_depth = 24; 103 dev->mode_config.funcs = &armada_drm_mode_config_funcs; 104 drm_mm_init(&priv->linear, mem->start, resource_size(mem)); 105 mutex_init(&priv->linear_lock); 106 107 ret = component_bind_all(dev->dev, dev); 108 if (ret) 109 goto err_kms; 110 111 ret = drm_vblank_init(dev, dev->mode_config.num_crtc); 112 if (ret) 113 goto err_comp; 114 115 dev->irq_enabled = true; 116 117 ret = armada_fbdev_init(dev); 118 if (ret) 119 goto err_comp; 120 121 drm_kms_helper_poll_init(dev); 122 123 return 0; 124 125 err_comp: 126 component_unbind_all(dev->dev, dev); 127 err_kms: 128 drm_mode_config_cleanup(dev); 129 drm_mm_takedown(&priv->linear); 130 flush_work(&priv->fb_unref_work); 131 132 return ret; 133 } 134 135 static int armada_drm_unload(struct drm_device *dev) 136 { 137 struct armada_private *priv = dev->dev_private; 138 139 drm_kms_helper_poll_fini(dev); 140 armada_fbdev_fini(dev); 141 142 component_unbind_all(dev->dev, dev); 143 144 drm_mode_config_cleanup(dev); 145 drm_mm_takedown(&priv->linear); 146 flush_work(&priv->fb_unref_work); 147 dev->dev_private = NULL; 148 149 return 0; 150 } 151 152 /* These are called under the vbl_lock. */ 153 static int armada_drm_enable_vblank(struct drm_device *dev, unsigned int pipe) 154 { 155 struct armada_private *priv = dev->dev_private; 156 armada_drm_crtc_enable_irq(priv->dcrtc[pipe], VSYNC_IRQ_ENA); 157 return 0; 158 } 159 160 static void armada_drm_disable_vblank(struct drm_device *dev, unsigned int pipe) 161 { 162 struct armada_private *priv = dev->dev_private; 163 armada_drm_crtc_disable_irq(priv->dcrtc[pipe], VSYNC_IRQ_ENA); 164 } 165 166 static struct drm_ioctl_desc armada_ioctls[] = { 167 DRM_IOCTL_DEF_DRV(ARMADA_GEM_CREATE, armada_gem_create_ioctl,0), 168 DRM_IOCTL_DEF_DRV(ARMADA_GEM_MMAP, armada_gem_mmap_ioctl, 0), 169 DRM_IOCTL_DEF_DRV(ARMADA_GEM_PWRITE, armada_gem_pwrite_ioctl, 0), 170 }; 171 172 static void armada_drm_lastclose(struct drm_device *dev) 173 { 174 armada_fbdev_lastclose(dev); 175 } 176 177 static const struct file_operations armada_drm_fops = { 178 .owner = THIS_MODULE, 179 .llseek = no_llseek, 180 .read = drm_read, 181 .poll = drm_poll, 182 .unlocked_ioctl = drm_ioctl, 183 .mmap = drm_gem_mmap, 184 .open = drm_open, 185 .release = drm_release, 186 }; 187 188 static struct drm_driver armada_drm_driver = { 189 .load = armada_drm_load, 190 .lastclose = armada_drm_lastclose, 191 .unload = armada_drm_unload, 192 .get_vblank_counter = drm_vblank_no_hw_counter, 193 .enable_vblank = armada_drm_enable_vblank, 194 .disable_vblank = armada_drm_disable_vblank, 195 #ifdef CONFIG_DEBUG_FS 196 .debugfs_init = armada_drm_debugfs_init, 197 .debugfs_cleanup = armada_drm_debugfs_cleanup, 198 #endif 199 .gem_free_object_unlocked = armada_gem_free_object, 200 .prime_handle_to_fd = drm_gem_prime_handle_to_fd, 201 .prime_fd_to_handle = drm_gem_prime_fd_to_handle, 202 .gem_prime_export = armada_gem_prime_export, 203 .gem_prime_import = armada_gem_prime_import, 204 .dumb_create = armada_gem_dumb_create, 205 .dumb_map_offset = armada_gem_dumb_map_offset, 206 .dumb_destroy = armada_gem_dumb_destroy, 207 .gem_vm_ops = &armada_gem_vm_ops, 208 .major = 1, 209 .minor = 0, 210 .name = "armada-drm", 211 .desc = "Armada SoC DRM", 212 .date = "20120730", 213 .driver_features = DRIVER_GEM | DRIVER_MODESET | 214 DRIVER_HAVE_IRQ | DRIVER_PRIME, 215 .ioctls = armada_ioctls, 216 .fops = &armada_drm_fops, 217 }; 218 219 static int armada_drm_bind(struct device *dev) 220 { 221 return drm_platform_init(&armada_drm_driver, to_platform_device(dev)); 222 } 223 224 static void armada_drm_unbind(struct device *dev) 225 { 226 drm_put_dev(dev_get_drvdata(dev)); 227 } 228 229 static int compare_of(struct device *dev, void *data) 230 { 231 return dev->of_node == data; 232 } 233 234 static int compare_dev_name(struct device *dev, void *data) 235 { 236 const char *name = data; 237 return !strcmp(dev_name(dev), name); 238 } 239 240 static void armada_add_endpoints(struct device *dev, 241 struct component_match **match, struct device_node *port) 242 { 243 struct device_node *ep, *remote; 244 245 for_each_child_of_node(port, ep) { 246 remote = of_graph_get_remote_port_parent(ep); 247 if (!remote || !of_device_is_available(remote)) { 248 of_node_put(remote); 249 continue; 250 } else if (!of_device_is_available(remote->parent)) { 251 dev_warn(dev, "parent device of %s is not available\n", 252 remote->full_name); 253 of_node_put(remote); 254 continue; 255 } 256 257 component_match_add(dev, match, compare_of, remote); 258 of_node_put(remote); 259 } 260 } 261 262 static const struct component_master_ops armada_master_ops = { 263 .bind = armada_drm_bind, 264 .unbind = armada_drm_unbind, 265 }; 266 267 static int armada_drm_probe(struct platform_device *pdev) 268 { 269 struct component_match *match = NULL; 270 struct device *dev = &pdev->dev; 271 int ret; 272 273 ret = drm_of_component_probe(dev, compare_dev_name, &armada_master_ops); 274 if (ret != -EINVAL) 275 return ret; 276 277 if (dev->platform_data) { 278 char **devices = dev->platform_data; 279 struct device_node *port; 280 struct device *d; 281 int i; 282 283 for (i = 0; devices[i]; i++) 284 component_match_add(dev, &match, compare_dev_name, 285 devices[i]); 286 287 if (i == 0) { 288 dev_err(dev, "missing 'ports' property\n"); 289 return -ENODEV; 290 } 291 292 for (i = 0; devices[i]; i++) { 293 d = bus_find_device_by_name(&platform_bus_type, NULL, 294 devices[i]); 295 if (d && d->of_node) { 296 for_each_child_of_node(d->of_node, port) 297 armada_add_endpoints(dev, &match, port); 298 } 299 put_device(d); 300 } 301 } 302 303 return component_master_add_with_match(&pdev->dev, &armada_master_ops, 304 match); 305 } 306 307 static int armada_drm_remove(struct platform_device *pdev) 308 { 309 component_master_del(&pdev->dev, &armada_master_ops); 310 return 0; 311 } 312 313 static const struct platform_device_id armada_drm_platform_ids[] = { 314 { 315 .name = "armada-drm", 316 }, { 317 .name = "armada-510-drm", 318 }, 319 { }, 320 }; 321 MODULE_DEVICE_TABLE(platform, armada_drm_platform_ids); 322 323 static struct platform_driver armada_drm_platform_driver = { 324 .probe = armada_drm_probe, 325 .remove = armada_drm_remove, 326 .driver = { 327 .name = "armada-drm", 328 }, 329 .id_table = armada_drm_platform_ids, 330 }; 331 332 static int __init armada_drm_init(void) 333 { 334 int ret; 335 336 armada_drm_driver.num_ioctls = ARRAY_SIZE(armada_ioctls); 337 338 ret = platform_driver_register(&armada_lcd_platform_driver); 339 if (ret) 340 return ret; 341 ret = platform_driver_register(&armada_drm_platform_driver); 342 if (ret) 343 platform_driver_unregister(&armada_lcd_platform_driver); 344 return ret; 345 } 346 module_init(armada_drm_init); 347 348 static void __exit armada_drm_exit(void) 349 { 350 platform_driver_unregister(&armada_drm_platform_driver); 351 platform_driver_unregister(&armada_lcd_platform_driver); 352 } 353 module_exit(armada_drm_exit); 354 355 MODULE_AUTHOR("Russell King <rmk+kernel@arm.linux.org.uk>"); 356 MODULE_DESCRIPTION("Armada DRM Driver"); 357 MODULE_LICENSE("GPL"); 358 MODULE_ALIAS("platform:armada-drm"); 359