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->irq_enabled = true;
 194         dev->vblank_disable_allowed = 1;
 195
 196         ret = armada_fbdev_init(dev);
 197         if (ret)
 198                 goto err_comp;
 199
 200         drm_kms_helper_poll_init(dev);
 201
 202         return 0;
 203
 204  err_comp:
 205         if (is_componentized(dev->dev))
 206                 component_unbind_all(dev->dev, dev);
 207  err_kms:
 208         drm_mode_config_cleanup(dev);
 209         drm_mm_takedown(&priv->linear);
 210         flush_work(&priv->fb_unref_work);
 211
 212         return ret;
 213 }
 214
 215 static int armada_drm_unload(struct drm_device *dev)
 216 {
 217         struct armada_private *priv = dev->dev_private;
 218
 219         drm_kms_helper_poll_fini(dev);
 220         armada_fbdev_fini(dev);
 221
 222         if (is_componentized(dev->dev))
 223                 component_unbind_all(dev->dev, dev);
 224
 225         drm_mode_config_cleanup(dev);
 226         drm_mm_takedown(&priv->linear);
 227         flush_work(&priv->fb_unref_work);
 228         dev->dev_private = NULL;
 229
 230         return 0;
 231 }
 232
 233 void armada_drm_vbl_event_add(struct armada_crtc *dcrtc,
 234         struct armada_vbl_event *evt)
 235 {
 236         unsigned long flags;
 237
 238         spin_lock_irqsave(&dcrtc->irq_lock, flags);
 239         if (list_empty(&evt->node)) {
 240                 list_add_tail(&evt->node, &dcrtc->vbl_list);
 241
 242                 drm_vblank_get(dcrtc->crtc.dev, dcrtc->num);
 243         }
 244         spin_unlock_irqrestore(&dcrtc->irq_lock, flags);
 245 }
 246
 247 void armada_drm_vbl_event_remove(struct armada_crtc *dcrtc,
 248         struct armada_vbl_event *evt)
 249 {
 250         if (!list_empty(&evt->node)) {
 251                 list_del_init(&evt->node);
 252                 drm_vblank_put(dcrtc->crtc.dev, dcrtc->num);
 253         }
 254 }
 255
 256 void armada_drm_vbl_event_remove_unlocked(struct armada_crtc *dcrtc,
 257         struct armada_vbl_event *evt)
 258 {
 259         unsigned long flags;
 260
 261         spin_lock_irqsave(&dcrtc->irq_lock, flags);
 262         armada_drm_vbl_event_remove(dcrtc, evt);
 263         spin_unlock_irqrestore(&dcrtc->irq_lock, flags);
 264 }
 265
 266 /* These are called under the vbl_lock. */
 267 static int armada_drm_enable_vblank(struct drm_device *dev, int crtc)
 268 {
 269         struct armada_private *priv = dev->dev_private;
 270         armada_drm_crtc_enable_irq(priv->dcrtc[crtc], VSYNC_IRQ_ENA);
 271         return 0;
 272 }
 273
 274 static void armada_drm_disable_vblank(struct drm_device *dev, int crtc)
 275 {
 276         struct armada_private *priv = dev->dev_private;
 277         armada_drm_crtc_disable_irq(priv->dcrtc[crtc], VSYNC_IRQ_ENA);
 278 }
 279
 280 static struct drm_ioctl_desc armada_ioctls[] = {
 281         DRM_IOCTL_DEF_DRV(ARMADA_GEM_CREATE, armada_gem_create_ioctl,
 282                 DRM_UNLOCKED),
 283         DRM_IOCTL_DEF_DRV(ARMADA_GEM_MMAP, armada_gem_mmap_ioctl,
 284                 DRM_UNLOCKED),
 285         DRM_IOCTL_DEF_DRV(ARMADA_GEM_PWRITE, armada_gem_pwrite_ioctl,
 286                 DRM_UNLOCKED),
 287 };
 288
 289 static void armada_drm_lastclose(struct drm_device *dev)
 290 {
 291         armada_fbdev_lastclose(dev);
 292 }
 293
 294 static const struct file_operations armada_drm_fops = {
 295         .owner                  = THIS_MODULE,
 296         .llseek                 = no_llseek,
 297         .read                   = drm_read,
 298         .poll                   = drm_poll,
 299         .unlocked_ioctl         = drm_ioctl,
 300         .mmap                   = drm_gem_mmap,
 301         .open                   = drm_open,
 302         .release                = drm_release,
 303 };
 304
 305 static struct drm_driver armada_drm_driver = {
 306         .load                   = armada_drm_load,
 307         .open                   = NULL,
 308         .preclose               = NULL,
 309         .postclose              = NULL,
 310         .lastclose              = armada_drm_lastclose,
 311         .unload                 = armada_drm_unload,
 312         .set_busid              = drm_platform_set_busid,
 313         .get_vblank_counter     = drm_vblank_count,
 314         .enable_vblank          = armada_drm_enable_vblank,
 315         .disable_vblank         = armada_drm_disable_vblank,
 316 #ifdef CONFIG_DEBUG_FS
 317         .debugfs_init           = armada_drm_debugfs_init,
 318         .debugfs_cleanup        = armada_drm_debugfs_cleanup,
 319 #endif
 320         .gem_free_object        = armada_gem_free_object,
 321         .prime_handle_to_fd     = drm_gem_prime_handle_to_fd,
 322         .prime_fd_to_handle     = drm_gem_prime_fd_to_handle,
 323         .gem_prime_export       = armada_gem_prime_export,
 324         .gem_prime_import       = armada_gem_prime_import,
 325         .dumb_create            = armada_gem_dumb_create,
 326         .dumb_map_offset        = armada_gem_dumb_map_offset,
 327         .dumb_destroy           = armada_gem_dumb_destroy,
 328         .gem_vm_ops             = &armada_gem_vm_ops,
 329         .major                  = 1,
 330         .minor                  = 0,
 331         .name                   = "armada-drm",
 332         .desc                   = "Armada SoC DRM",
 333         .date                   = "20120730",
 334         .driver_features        = DRIVER_GEM | DRIVER_MODESET |
 335                                   DRIVER_HAVE_IRQ | DRIVER_PRIME,
 336         .ioctls                 = armada_ioctls,
 337         .fops                   = &armada_drm_fops,
 338 };
 339
 340 static int armada_drm_bind(struct device *dev)
 341 {
 342         return drm_platform_init(&armada_drm_driver, to_platform_device(dev));
 343 }
 344
 345 static void armada_drm_unbind(struct device *dev)
 346 {
 347         drm_put_dev(dev_get_drvdata(dev));
 348 }
 349
 350 static int compare_of(struct device *dev, void *data)
 351 {
 352         return dev->of_node == data;
 353 }
 354
 355 static int compare_dev_name(struct device *dev, void *data)
 356 {
 357         const char *name = data;
 358         return !strcmp(dev_name(dev), name);
 359 }
 360
 361 static void armada_add_endpoints(struct device *dev,
 362         struct component_match **match, struct device_node *port)
 363 {
 364         struct device_node *ep, *remote;
 365
 366         for_each_child_of_node(port, ep) {
 367                 remote = of_graph_get_remote_port_parent(ep);
 368                 if (!remote || !of_device_is_available(remote)) {
 369                         of_node_put(remote);
 370                         continue;
 371                 } else if (!of_device_is_available(remote->parent)) {
 372                         dev_warn(dev, "parent device of %s is not available\n",
 373                                  remote->full_name);
 374                         of_node_put(remote);
 375                         continue;
 376                 }
 377
 378                 component_match_add(dev, match, compare_of, remote);
 379                 of_node_put(remote);
 380         }
 381 }
 382
 383 static int armada_drm_find_components(struct device *dev,
 384         struct component_match **match)
 385 {
 386         struct device_node *port;
 387         int i;
 388
 389         if (dev->of_node) {
 390                 struct device_node *np = dev->of_node;
 391
 392                 for (i = 0; ; i++) {
 393                         port = of_parse_phandle(np, "ports", i);
 394                         if (!port)
 395                                 break;
 396
 397                         component_match_add(dev, match, compare_of, port);
 398                         of_node_put(port);
 399                 }
 400
 401                 if (i == 0) {
 402                         dev_err(dev, "missing 'ports' property\n");
 403                         return -ENODEV;
 404                 }
 405
 406                 for (i = 0; ; i++) {
 407                         port = of_parse_phandle(np, "ports", i);
 408                         if (!port)
 409                                 break;
 410
 411                         armada_add_endpoints(dev, match, port);
 412                         of_node_put(port);
 413                 }
 414         } else if (dev->platform_data) {
 415                 char **devices = dev->platform_data;
 416                 struct device *d;
 417
 418                 for (i = 0; devices[i]; i++)
 419                         component_match_add(dev, match, compare_dev_name,
 420                                             devices[i]);
 421
 422                 if (i == 0) {
 423                         dev_err(dev, "missing 'ports' property\n");
 424                         return -ENODEV;
 425                 }
 426
 427                 for (i = 0; devices[i]; i++) {
 428                         d = bus_find_device_by_name(&platform_bus_type, NULL,
 429                                         devices[i]);
 430                         if (d && d->of_node) {
 431                                 for_each_child_of_node(d->of_node, port)
 432                                         armada_add_endpoints(dev, match, port);
 433                         }
 434                         put_device(d);
 435                 }
 436         }
 437
 438         return 0;
 439 }
 440
 441 static const struct component_master_ops armada_master_ops = {
 442         .bind = armada_drm_bind,
 443         .unbind = armada_drm_unbind,
 444 };
 445
 446 static int armada_drm_probe(struct platform_device *pdev)
 447 {
 448         if (is_componentized(&pdev->dev)) {
 449                 struct component_match *match = NULL;
 450                 int ret;
 451
 452                 ret = armada_drm_find_components(&pdev->dev, &match);
 453                 if (ret < 0)
 454                         return ret;
 455
 456                 return component_master_add_with_match(&pdev->dev,
 457                                 &armada_master_ops, match);
 458         } else {
 459                 return drm_platform_init(&armada_drm_driver, pdev);
 460         }
 461 }
 462
 463 static int armada_drm_remove(struct platform_device *pdev)
 464 {
 465         if (is_componentized(&pdev->dev))
 466                 component_master_del(&pdev->dev, &armada_master_ops);
 467         else
 468                 drm_put_dev(platform_get_drvdata(pdev));
 469         return 0;
 470 }
 471
 472 static const struct platform_device_id armada_drm_platform_ids[] = {
 473         {
 474                 .name           = "armada-drm",
 475                 .driver_data    = (unsigned long)&armada510_ops,
 476         }, {
 477                 .name           = "armada-510-drm",
 478                 .driver_data    = (unsigned long)&armada510_ops,
 479         },
 480         { },
 481 };
 482 MODULE_DEVICE_TABLE(platform, armada_drm_platform_ids);
 483
 484 static struct platform_driver armada_drm_platform_driver = {
 485         .probe  = armada_drm_probe,
 486         .remove = armada_drm_remove,
 487         .driver = {
 488                 .name   = "armada-drm",
 489                 .owner  = THIS_MODULE,
 490         },
 491         .id_table = armada_drm_platform_ids,
 492 };
 493
 494 static int __init armada_drm_init(void)
 495 {
 496         int ret;
 497
 498         armada_drm_driver.num_ioctls = ARRAY_SIZE(armada_ioctls);
 499
 500         ret = platform_driver_register(&armada_lcd_platform_driver);
 501         if (ret)
 502                 return ret;
 503         ret = platform_driver_register(&armada_drm_platform_driver);
 504         if (ret)
 505                 platform_driver_unregister(&armada_lcd_platform_driver);
 506         return ret;
 507 }
 508 module_init(armada_drm_init);
 509
 510 static void __exit armada_drm_exit(void)
 511 {
 512         platform_driver_unregister(&armada_drm_platform_driver);
 513         platform_driver_unregister(&armada_lcd_platform_driver);
 514 }
 515 module_exit(armada_drm_exit);
 516
 517 MODULE_AUTHOR("Russell King <rmk+kernel@arm.linux.org.uk>");
 518 MODULE_DESCRIPTION("Armada DRM Driver");
 519 MODULE_LICENSE("GPL");
 520 MODULE_ALIAS("platform:armada-drm");