drivers/gpu/drm/armada/armada_drv.c

   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 "armada_crtc.h"
  15 #include "armada_drm.h"
  16 #include "armada_gem.h"
  17 #include "armada_hw.h"
  18 #include <drm/armada_drm.h>
  19 #include "armada_ioctlP.h"
  20
  21 #ifdef CONFIG_DRM_ARMADA_TDA1998X
  22 #include <drm/i2c/tda998x.h>
  23 #include "armada_slave.h"
  24
  25 static struct tda998x_encoder_params params = {
  26         /* With 0x24, there is no translation between vp_out and int_vp
  27         FB      LCD out Pins    VIP     Int Vp
  28         R:23:16 R:7:0   VPC7:0  7:0     7:0[R]
  29         G:15:8  G:15:8  VPB7:0  23:16   23:16[G]
  30         B:7:0   B:23:16 VPA7:0  15:8    15:8[B]
  31         */
  32         .swap_a = 2,
  33         .swap_b = 3,
  34         .swap_c = 4,
  35         .swap_d = 5,
  36         .swap_e = 0,
  37         .swap_f = 1,
  38         .audio_cfg = BIT(2),
  39         .audio_frame[1] = 1,
  40         .audio_format = AFMT_SPDIF,
  41         .audio_sample_rate = 44100,
  42 };
  43
  44 static const struct armada_drm_slave_config tda19988_config = {
  45         .i2c_adapter_id = 0,
  46         .crtcs = 1 << 0, /* Only LCD0 at the moment */
  47         .polled = DRM_CONNECTOR_POLL_CONNECT | DRM_CONNECTOR_POLL_DISCONNECT,
  48         .interlace_allowed = true,
  49         .info = {
  50                 .type = "tda998x",
  51                 .addr = 0x70,
  52                 .platform_data = &params,
  53         },
  54 };
  55 #endif
  56
  57 static bool is_componentized(struct device *dev)
  58 {
  59         return dev->of_node || dev->platform_data;
  60 }
  61
  62 static void armada_drm_unref_work(struct work_struct *work)
  63 {
  64         struct armada_private *priv =
  65                 container_of(work, struct armada_private, fb_unref_work);
  66         struct drm_framebuffer *fb;
  67
  68         while (kfifo_get(&priv->fb_unref, &fb))
  69                 drm_framebuffer_unreference(fb);
  70 }
  71
  72 /* Must be called with dev->event_lock held */
  73 void __armada_drm_queue_unref_work(struct drm_device *dev,
  74         struct drm_framebuffer *fb)
  75 {
  76         struct armada_private *priv = dev->dev_private;
  77
  78         WARN_ON(!kfifo_put(&priv->fb_unref, fb));
  79         schedule_work(&priv->fb_unref_work);
  80 }
  81
  82 void armada_drm_queue_unref_work(struct drm_device *dev,
  83         struct drm_framebuffer *fb)
  84 {
  85         unsigned long flags;
  86
  87         spin_lock_irqsave(&dev->event_lock, flags);
  88         __armada_drm_queue_unref_work(dev, fb);
  89         spin_unlock_irqrestore(&dev->event_lock, flags);
  90 }
  91
  92 static int armada_drm_load(struct drm_device *dev, unsigned long flags)
  93 {
  94         const struct platform_device_id *id;
  95         const struct armada_variant *variant;
  96         struct armada_private *priv;
  97         struct resource *res[ARRAY_SIZE(priv->dcrtc)];
  98         struct resource *mem = NULL;
  99         int ret, n, i;
 100
 101         memset(res, 0, sizeof(res));
 102
 103         for (n = i = 0; ; n++) {
 104                 struct resource *r = platform_get_resource(dev->platformdev,
 105                                                            IORESOURCE_MEM, n);
 106                 if (!r)
 107                         break;
 108
 109                 /* Resources above 64K are graphics memory */
 110                 if (resource_size(r) > SZ_64K)
 111                         mem = r;
 112                 else if (i < ARRAY_SIZE(priv->dcrtc))
 113                         res[i++] = r;
 114                 else
 115                         return -EINVAL;
 116         }
 117
 118         if (!mem)
 119                 return -ENXIO;
 120
 121         if (!devm_request_mem_region(dev->dev, mem->start,
 122                         resource_size(mem), "armada-drm"))
 123                 return -EBUSY;
 124
 125         priv = devm_kzalloc(dev->dev, sizeof(*priv), GFP_KERNEL);
 126         if (!priv) {
 127                 DRM_ERROR("failed to allocate private\n");
 128                 return -ENOMEM;
 129         }
 130
 131         platform_set_drvdata(dev->platformdev, dev);
 132         dev->dev_private = priv;
 133
 134         /* Get the implementation specific driver data. */
 135         id = platform_get_device_id(dev->platformdev);
 136         if (!id)
 137                 return -ENXIO;
 138
 139         variant = (const struct armada_variant *)id->driver_data;
 140
 141         INIT_WORK(&priv->fb_unref_work, armada_drm_unref_work);
 142         INIT_KFIFO(priv->fb_unref);
 143
 144         /* Mode setting support */
 145         drm_mode_config_init(dev);
 146         dev->mode_config.min_width = 320;
 147         dev->mode_config.min_height = 200;
 148
 149         /*
 150          * With vscale enabled, the maximum width is 1920 due to the
 151          * 1920 by 3 lines RAM
 152          */
 153         dev->mode_config.max_width = 1920;
 154         dev->mode_config.max_height = 2048;
 155
 156         dev->mode_config.preferred_depth = 24;
 157         dev->mode_config.funcs = &armada_drm_mode_config_funcs;
 158         drm_mm_init(&priv->linear, mem->start, resource_size(mem));
 159
 160         /* Create all LCD controllers */
 161         for (n = 0; n < ARRAY_SIZE(priv->dcrtc); n++) {
 162                 int irq;
 163
 164                 if (!res[n])
 165                         break;
 166
 167                 irq = platform_get_irq(dev->platformdev, n);
 168                 if (irq < 0)
 169                         goto err_kms;
 170
 171                 ret = armada_drm_crtc_create(dev, dev->dev, res[n], irq,
 172                                              variant, NULL);
 173                 if (ret)
 174                         goto err_kms;
 175         }
 176
 177         if (is_componentized(dev->dev)) {
 178                 ret = component_bind_all(dev->dev, dev);
 179                 if (ret)
 180                         goto err_kms;
 181         } else {
 182 #ifdef CONFIG_DRM_ARMADA_TDA1998X
 183                 ret = armada_drm_connector_slave_create(dev, &tda19988_config);
 184                 if (ret)
 185                         goto err_kms;
 186 #endif
 187         }
 188
 189         ret = drm_vblank_init(dev, dev->mode_config.num_crtc);
 190         if (ret)
 191                 goto err_comp;
 192
 193         dev->vblank_disable_allowed = 1;
 194
 195         ret = armada_fbdev_init(dev);
 196         if (ret)
 197                 goto err_comp;
 198
 199         drm_kms_helper_poll_init(dev);
 200
 201         return 0;
 202
 203  err_comp:
 204         if (is_componentized(dev->dev))
 205                 component_unbind_all(dev->dev, dev);
 206  err_kms:
 207         drm_mode_config_cleanup(dev);
 208         drm_mm_takedown(&priv->linear);
 209         flush_work(&priv->fb_unref_work);
 210
 211         return ret;
 212 }
 213
 214 static int armada_drm_unload(struct drm_device *dev)
 215 {
 216         struct armada_private *priv = dev->dev_private;
 217
 218         drm_kms_helper_poll_fini(dev);
 219         armada_fbdev_fini(dev);
 220
 221         if (is_componentized(dev->dev))
 222                 component_unbind_all(dev->dev, dev);
 223
 224         drm_mode_config_cleanup(dev);
 225         drm_mm_takedown(&priv->linear);
 226         flush_work(&priv->fb_unref_work);
 227         dev->dev_private = NULL;
 228
 229         return 0;
 230 }
 231
 232 void armada_drm_vbl_event_add(struct armada_crtc *dcrtc,
 233         struct armada_vbl_event *evt)
 234 {
 235         unsigned long flags;
 236
 237         spin_lock_irqsave(&dcrtc->irq_lock, flags);
 238         if (list_empty(&evt->node)) {
 239                 list_add_tail(&evt->node, &dcrtc->vbl_list);
 240
 241                 drm_vblank_get(dcrtc->crtc.dev, dcrtc->num);
 242         }
 243         spin_unlock_irqrestore(&dcrtc->irq_lock, flags);
 244 }
 245
 246 void armada_drm_vbl_event_remove(struct armada_crtc *dcrtc,
 247         struct armada_vbl_event *evt)
 248 {
 249         if (!list_empty(&evt->node)) {
 250                 list_del_init(&evt->node);
 251                 drm_vblank_put(dcrtc->crtc.dev, dcrtc->num);
 252         }
 253 }
 254
 255 void armada_drm_vbl_event_remove_unlocked(struct armada_crtc *dcrtc,
 256         struct armada_vbl_event *evt)
 257 {
 258         unsigned long flags;
 259
 260         spin_lock_irqsave(&dcrtc->irq_lock, flags);
 261         armada_drm_vbl_event_remove(dcrtc, evt);
 262         spin_unlock_irqrestore(&dcrtc->irq_lock, flags);
 263 }
 264
 265 /* These are called under the vbl_lock. */
 266 static int armada_drm_enable_vblank(struct drm_device *dev, int crtc)
 267 {
 268         struct armada_private *priv = dev->dev_private;
 269         armada_drm_crtc_enable_irq(priv->dcrtc[crtc], VSYNC_IRQ_ENA);
 270         return 0;
 271 }
 272
 273 static void armada_drm_disable_vblank(struct drm_device *dev, int crtc)
 274 {
 275         struct armada_private *priv = dev->dev_private;
 276         armada_drm_crtc_disable_irq(priv->dcrtc[crtc], VSYNC_IRQ_ENA);
 277 }
 278
 279 static struct drm_ioctl_desc armada_ioctls[] = {
 280         DRM_IOCTL_DEF_DRV(ARMADA_GEM_CREATE, armada_gem_create_ioctl,
 281                 DRM_UNLOCKED),
 282         DRM_IOCTL_DEF_DRV(ARMADA_GEM_MMAP, armada_gem_mmap_ioctl,
 283                 DRM_UNLOCKED),
 284         DRM_IOCTL_DEF_DRV(ARMADA_GEM_PWRITE, armada_gem_pwrite_ioctl,
 285                 DRM_UNLOCKED),
 286 };
 287
 288 static void armada_drm_lastclose(struct drm_device *dev)
 289 {
 290         armada_fbdev_lastclose(dev);
 291 }
 292
 293 static const struct file_operations armada_drm_fops = {
 294         .owner                  = THIS_MODULE,
 295         .llseek                 = no_llseek,
 296         .read                   = drm_read,
 297         .poll                   = drm_poll,
 298         .unlocked_ioctl         = drm_ioctl,
 299         .mmap                   = drm_gem_mmap,
 300         .open                   = drm_open,
 301         .release                = drm_release,
 302 };
 303
 304 static struct drm_driver armada_drm_driver = {
 305         .load                   = armada_drm_load,
 306         .open                   = NULL,
 307         .preclose               = NULL,
 308         .postclose              = NULL,
 309         .lastclose              = armada_drm_lastclose,
 310         .unload                 = armada_drm_unload,
 311         .set_busid              = drm_platform_set_busid,
 312         .get_vblank_counter     = drm_vblank_count,
 313         .enable_vblank          = armada_drm_enable_vblank,
 314         .disable_vblank         = armada_drm_disable_vblank,
 315 #ifdef CONFIG_DEBUG_FS
 316         .debugfs_init           = armada_drm_debugfs_init,
 317         .debugfs_cleanup        = armada_drm_debugfs_cleanup,
 318 #endif
 319         .gem_free_object        = armada_gem_free_object,
 320         .prime_handle_to_fd     = drm_gem_prime_handle_to_fd,
 321         .prime_fd_to_handle     = drm_gem_prime_fd_to_handle,
 322         .gem_prime_export       = armada_gem_prime_export,
 323         .gem_prime_import       = armada_gem_prime_import,
 324         .dumb_create            = armada_gem_dumb_create,
 325         .dumb_map_offset        = armada_gem_dumb_map_offset,
 326         .dumb_destroy           = armada_gem_dumb_destroy,
 327         .gem_vm_ops             = &armada_gem_vm_ops,
 328         .major                  = 1,
 329         .minor                  = 0,
 330         .name                   = "armada-drm",
 331         .desc                   = "Armada SoC DRM",
 332         .date                   = "20120730",
 333         .driver_features        = DRIVER_GEM | DRIVER_MODESET |
 334                                   DRIVER_PRIME,
 335         .ioctls                 = armada_ioctls,
 336         .fops                   = &armada_drm_fops,
 337 };
 338
 339 static int armada_drm_bind(struct device *dev)
 340 {
 341         return drm_platform_init(&armada_drm_driver, to_platform_device(dev));
 342 }
 343
 344 static void armada_drm_unbind(struct device *dev)
 345 {
 346         drm_put_dev(dev_get_drvdata(dev));
 347 }
 348
 349 static int compare_of(struct device *dev, void *data)
 350 {
 351         return dev->of_node == data;
 352 }
 353
 354 static int compare_dev_name(struct device *dev, void *data)
 355 {
 356         const char *name = data;
 357         return !strcmp(dev_name(dev), name);
 358 }
 359
 360 static void armada_add_endpoints(struct device *dev,
 361         struct component_match **match, struct device_node *port)
 362 {
 363         struct device_node *ep, *remote;
 364
 365         for_each_child_of_node(port, ep) {
 366                 remote = of_graph_get_remote_port_parent(ep);
 367                 if (!remote || !of_device_is_available(remote)) {
 368                         of_node_put(remote);
 369                         continue;
 370                 } else if (!of_device_is_available(remote->parent)) {
 371                         dev_warn(dev, "parent device of %s is not available\n",
 372                                  remote->full_name);
 373                         of_node_put(remote);
 374                         continue;
 375                 }
 376
 377                 component_match_add(dev, match, compare_of, remote);
 378                 of_node_put(remote);
 379         }
 380 }
 381
 382 static int armada_drm_find_components(struct device *dev,
 383         struct component_match **match)
 384 {
 385         struct device_node *port;
 386         int i;
 387
 388         if (dev->of_node) {
 389                 struct device_node *np = dev->of_node;
 390
 391                 for (i = 0; ; i++) {
 392                         port = of_parse_phandle(np, "ports", i);
 393                         if (!port)
 394                                 break;
 395
 396                         component_match_add(dev, match, compare_of, port);
 397                         of_node_put(port);
 398                 }
 399
 400                 if (i == 0) {
 401                         dev_err(dev, "missing 'ports' property\n");
 402                         return -ENODEV;
 403                 }
 404
 405                 for (i = 0; ; i++) {
 406                         port = of_parse_phandle(np, "ports", i);
 407                         if (!port)
 408                                 break;
 409
 410                         armada_add_endpoints(dev, match, port);
 411                         of_node_put(port);
 412                 }
 413         } else if (dev->platform_data) {
 414                 char **devices = dev->platform_data;
 415                 struct device *d;
 416
 417                 for (i = 0; devices[i]; i++)
 418                         component_match_add(dev, match, compare_dev_name,
 419                                             devices[i]);
 420
 421                 if (i == 0) {
 422                         dev_err(dev, "missing 'ports' property\n");
 423                         return -ENODEV;
 424                 }
 425
 426                 for (i = 0; devices[i]; i++) {
 427                         d = bus_find_device_by_name(&platform_bus_type, NULL,
 428                                         devices[i]);
 429                         if (d && d->of_node) {
 430                                 for_each_child_of_node(d->of_node, port)
 431                                         armada_add_endpoints(dev, match, port);
 432                         }
 433                         put_device(d);
 434                 }
 435         }
 436
 437         return 0;
 438 }
 439
 440 static const struct component_master_ops armada_master_ops = {
 441         .bind = armada_drm_bind,
 442         .unbind = armada_drm_unbind,
 443 };
 444
 445 static int armada_drm_probe(struct platform_device *pdev)
 446 {
 447         if (is_componentized(&pdev->dev)) {
 448                 struct component_match *match = NULL;
 449                 int ret;
 450
 451                 ret = armada_drm_find_components(&pdev->dev, &match);
 452                 if (ret < 0)
 453                         return ret;
 454
 455                 return component_master_add_with_match(&pdev->dev,
 456                                 &armada_master_ops, match);
 457         } else {
 458                 return drm_platform_init(&armada_drm_driver, pdev);
 459         }
 460 }
 461
 462 static int armada_drm_remove(struct platform_device *pdev)
 463 {
 464         if (is_componentized(&pdev->dev))
 465                 component_master_del(&pdev->dev, &armada_master_ops);
 466         else
 467                 drm_put_dev(platform_get_drvdata(pdev));
 468         return 0;
 469 }
 470
 471 static const struct platform_device_id armada_drm_platform_ids[] = {
 472         {
 473                 .name           = "armada-drm",
 474                 .driver_data    = (unsigned long)&armada510_ops,
 475         }, {
 476                 .name           = "armada-510-drm",
 477                 .driver_data    = (unsigned long)&armada510_ops,
 478         },
 479         { },
 480 };
 481 MODULE_DEVICE_TABLE(platform, armada_drm_platform_ids);
 482
 483 static struct platform_driver armada_drm_platform_driver = {
 484         .probe  = armada_drm_probe,
 485         .remove = armada_drm_remove,
 486         .driver = {
 487                 .name   = "armada-drm",
 488                 .owner  = THIS_MODULE,
 489         },
 490         .id_table = armada_drm_platform_ids,
 491 };
 492
 493 static int __init armada_drm_init(void)
 494 {
 495         int ret;
 496
 497         armada_drm_driver.num_ioctls = ARRAY_SIZE(armada_ioctls);
 498
 499         ret = platform_driver_register(&armada_lcd_platform_driver);
 500         if (ret)
 501                 return ret;
 502         ret = platform_driver_register(&armada_drm_platform_driver);
 503         if (ret)
 504                 platform_driver_unregister(&armada_lcd_platform_driver);
 505         return ret;
 506 }
 507 module_init(armada_drm_init);
 508
 509 static void __exit armada_drm_exit(void)
 510 {
 511         platform_driver_unregister(&armada_drm_platform_driver);
 512         platform_driver_unregister(&armada_lcd_platform_driver);
 513 }
 514 module_exit(armada_drm_exit);
 515
 516 MODULE_AUTHOR("Russell King <rmk+kernel@arm.linux.org.uk>");
 517 MODULE_DESCRIPTION("Armada DRM Driver");
 518 MODULE_LICENSE("GPL");
 519 MODULE_ALIAS("platform:armada-drm");