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/module.h>
  10 #include <drm/drmP.h>
  11 #include <drm/drm_crtc_helper.h>
  12 #include "armada_crtc.h"
  13 #include "armada_drm.h"
  14 #include "armada_gem.h"
  15 #include "armada_hw.h"
  16 #include <drm/armada_drm.h>
  17 #include "armada_ioctlP.h"
  18
  19 #ifdef CONFIG_DRM_ARMADA_TDA1998X
  20 #include <drm/i2c/tda998x.h>
  21 #include "armada_slave.h"
  22
  23 static struct tda998x_encoder_params params = {
  24         /* With 0x24, there is no translation between vp_out and int_vp
  25         FB      LCD out Pins    VIP     Int Vp
  26         R:23:16 R:7:0   VPC7:0  7:0     7:0[R]
  27         G:15:8  G:15:8  VPB7:0  23:16   23:16[G]
  28         B:7:0   B:23:16 VPA7:0  15:8    15:8[B]
  29         */
  30         .swap_a = 2,
  31         .swap_b = 3,
  32         .swap_c = 4,
  33         .swap_d = 5,
  34         .swap_e = 0,
  35         .swap_f = 1,
  36         .audio_cfg = BIT(2),
  37         .audio_frame[1] = 1,
  38         .audio_format = AFMT_SPDIF,
  39         .audio_sample_rate = 44100,
  40 };
  41
  42 static const struct armada_drm_slave_config tda19988_config = {
  43         .i2c_adapter_id = 0,
  44         .crtcs = 1 << 0, /* Only LCD0 at the moment */
  45         .polled = DRM_CONNECTOR_POLL_CONNECT | DRM_CONNECTOR_POLL_DISCONNECT,
  46         .interlace_allowed = true,
  47         .info = {
  48                 .type = "tda998x",
  49                 .addr = 0x70,
  50                 .platform_data = &params,
  51         },
  52 };
  53 #endif
  54
  55 static void armada_drm_unref_work(struct work_struct *work)
  56 {
  57         struct armada_private *priv =
  58                 container_of(work, struct armada_private, fb_unref_work);
  59         struct drm_framebuffer *fb;
  60
  61         while (kfifo_get(&priv->fb_unref, &fb))
  62                 drm_framebuffer_unreference(fb);
  63 }
  64
  65 /* Must be called with dev->event_lock held */
  66 void __armada_drm_queue_unref_work(struct drm_device *dev,
  67         struct drm_framebuffer *fb)
  68 {
  69         struct armada_private *priv = dev->dev_private;
  70
  71         /*
  72          * Yes, we really must jump through these hoops just to store a
  73          * _pointer_ to something into the kfifo.  This is utterly insane
  74          * and idiotic, because it kfifo requires the _data_ pointed to by
  75          * the pointer const, not the pointer itself.  Not only that, but
  76          * you have to pass a pointer _to_ the pointer you want stored.
  77          */
  78         const struct drm_framebuffer *silly_api_alert = fb;
  79         WARN_ON(!kfifo_put(&priv->fb_unref, &silly_api_alert));
  80         schedule_work(&priv->fb_unref_work);
  81 }
  82
  83 void armada_drm_queue_unref_work(struct drm_device *dev,
  84         struct drm_framebuffer *fb)
  85 {
  86         unsigned long flags;
  87
  88         spin_lock_irqsave(&dev->event_lock, flags);
  89         __armada_drm_queue_unref_work(dev, fb);
  90         spin_unlock_irqrestore(&dev->event_lock, flags);
  91 }
  92
  93 static int armada_drm_load(struct drm_device *dev, unsigned long flags)
  94 {
  95         const struct platform_device_id *id;
  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 (!res[0] || !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         dev->dev_private = priv;
 132
 133         /* Get the implementation specific driver data. */
 134         id = platform_get_device_id(dev->platformdev);
 135         if (!id)
 136                 return -ENXIO;
 137
 138         priv->variant = (struct armada_variant *)id->driver_data;
 139
 140         ret = priv->variant->init(priv, dev->dev);
 141         if (ret)
 142                 return ret;
 143
 144         INIT_WORK(&priv->fb_unref_work, armada_drm_unref_work);
 145         INIT_KFIFO(priv->fb_unref);
 146
 147         /* Mode setting support */
 148         drm_mode_config_init(dev);
 149         dev->mode_config.min_width = 320;
 150         dev->mode_config.min_height = 200;
 151
 152         /*
 153          * With vscale enabled, the maximum width is 1920 due to the
 154          * 1920 by 3 lines RAM
 155          */
 156         dev->mode_config.max_width = 1920;
 157         dev->mode_config.max_height = 2048;
 158
 159         dev->mode_config.preferred_depth = 24;
 160         dev->mode_config.funcs = &armada_drm_mode_config_funcs;
 161         drm_mm_init(&priv->linear, mem->start, resource_size(mem));
 162
 163         /* Create all LCD controllers */
 164         for (n = 0; n < ARRAY_SIZE(priv->dcrtc); n++) {
 165                 if (!res[n])
 166                         break;
 167
 168                 ret = armada_drm_crtc_create(dev, n, res[n]);
 169                 if (ret)
 170                         goto err_kms;
 171         }
 172
 173 #ifdef CONFIG_DRM_ARMADA_TDA1998X
 174         ret = armada_drm_connector_slave_create(dev, &tda19988_config);
 175         if (ret)
 176                 goto err_kms;
 177 #endif
 178
 179         ret = drm_vblank_init(dev, n);
 180         if (ret)
 181                 goto err_kms;
 182
 183         ret = drm_irq_install(dev);
 184         if (ret)
 185                 goto err_kms;
 186
 187         dev->vblank_disable_allowed = 1;
 188
 189         ret = armada_fbdev_init(dev);
 190         if (ret)
 191                 goto err_irq;
 192
 193         drm_kms_helper_poll_init(dev);
 194
 195         return 0;
 196
 197  err_irq:
 198         drm_irq_uninstall(dev);
 199  err_kms:
 200         drm_mode_config_cleanup(dev);
 201         drm_mm_takedown(&priv->linear);
 202         flush_work(&priv->fb_unref_work);
 203
 204         return ret;
 205 }
 206
 207 static int armada_drm_unload(struct drm_device *dev)
 208 {
 209         struct armada_private *priv = dev->dev_private;
 210
 211         drm_kms_helper_poll_fini(dev);
 212         armada_fbdev_fini(dev);
 213         drm_irq_uninstall(dev);
 214         drm_mode_config_cleanup(dev);
 215         drm_mm_takedown(&priv->linear);
 216         flush_work(&priv->fb_unref_work);
 217         dev->dev_private = NULL;
 218
 219         return 0;
 220 }
 221
 222 void armada_drm_vbl_event_add(struct armada_crtc *dcrtc,
 223         struct armada_vbl_event *evt)
 224 {
 225         unsigned long flags;
 226
 227         spin_lock_irqsave(&dcrtc->irq_lock, flags);
 228         if (list_empty(&evt->node)) {
 229                 list_add_tail(&evt->node, &dcrtc->vbl_list);
 230
 231                 drm_vblank_get(dcrtc->crtc.dev, dcrtc->num);
 232         }
 233         spin_unlock_irqrestore(&dcrtc->irq_lock, flags);
 234 }
 235
 236 void armada_drm_vbl_event_remove(struct armada_crtc *dcrtc,
 237         struct armada_vbl_event *evt)
 238 {
 239         if (!list_empty(&evt->node)) {
 240                 list_del_init(&evt->node);
 241                 drm_vblank_put(dcrtc->crtc.dev, dcrtc->num);
 242         }
 243 }
 244
 245 void armada_drm_vbl_event_remove_unlocked(struct armada_crtc *dcrtc,
 246         struct armada_vbl_event *evt)
 247 {
 248         unsigned long flags;
 249
 250         spin_lock_irqsave(&dcrtc->irq_lock, flags);
 251         armada_drm_vbl_event_remove(dcrtc, evt);
 252         spin_unlock_irqrestore(&dcrtc->irq_lock, flags);
 253 }
 254
 255 /* These are called under the vbl_lock. */
 256 static int armada_drm_enable_vblank(struct drm_device *dev, int crtc)
 257 {
 258         struct armada_private *priv = dev->dev_private;
 259         armada_drm_crtc_enable_irq(priv->dcrtc[crtc], VSYNC_IRQ_ENA);
 260         return 0;
 261 }
 262
 263 static void armada_drm_disable_vblank(struct drm_device *dev, int crtc)
 264 {
 265         struct armada_private *priv = dev->dev_private;
 266         armada_drm_crtc_disable_irq(priv->dcrtc[crtc], VSYNC_IRQ_ENA);
 267 }
 268
 269 static irqreturn_t armada_drm_irq_handler(int irq, void *arg)
 270 {
 271         struct drm_device *dev = arg;
 272         struct armada_private *priv = dev->dev_private;
 273         struct armada_crtc *dcrtc = priv->dcrtc[0];
 274         uint32_t v, stat = readl_relaxed(dcrtc->base + LCD_SPU_IRQ_ISR);
 275         irqreturn_t handled = IRQ_NONE;
 276
 277         /*
 278          * This is rediculous - rather than writing bits to clear, we
 279          * have to set the actual status register value.  This is racy.
 280          */
 281         writel_relaxed(0, dcrtc->base + LCD_SPU_IRQ_ISR);
 282
 283         /* Mask out those interrupts we haven't enabled */
 284         v = stat & dcrtc->irq_ena;
 285
 286         if (v & (VSYNC_IRQ|GRA_FRAME_IRQ|DUMB_FRAMEDONE)) {
 287                 armada_drm_crtc_irq(dcrtc, stat);
 288                 handled = IRQ_HANDLED;
 289         }
 290
 291         return handled;
 292 }
 293
 294 static int armada_drm_irq_postinstall(struct drm_device *dev)
 295 {
 296         struct armada_private *priv = dev->dev_private;
 297         struct armada_crtc *dcrtc = priv->dcrtc[0];
 298
 299         spin_lock_irq(&dev->vbl_lock);
 300         writel_relaxed(dcrtc->irq_ena, dcrtc->base + LCD_SPU_IRQ_ENA);
 301         writel(0, dcrtc->base + LCD_SPU_IRQ_ISR);
 302         spin_unlock_irq(&dev->vbl_lock);
 303
 304         return 0;
 305 }
 306
 307 static void armada_drm_irq_uninstall(struct drm_device *dev)
 308 {
 309         struct armada_private *priv = dev->dev_private;
 310         struct armada_crtc *dcrtc = priv->dcrtc[0];
 311
 312         writel(0, dcrtc->base + LCD_SPU_IRQ_ENA);
 313 }
 314
 315 static struct drm_ioctl_desc armada_ioctls[] = {
 316         DRM_IOCTL_DEF_DRV(ARMADA_GEM_CREATE, armada_gem_create_ioctl,
 317                 DRM_UNLOCKED),
 318         DRM_IOCTL_DEF_DRV(ARMADA_GEM_MMAP, armada_gem_mmap_ioctl,
 319                 DRM_UNLOCKED),
 320         DRM_IOCTL_DEF_DRV(ARMADA_GEM_PWRITE, armada_gem_pwrite_ioctl,
 321                 DRM_UNLOCKED),
 322 };
 323
 324 static void armada_drm_lastclose(struct drm_device *dev)
 325 {
 326         armada_fbdev_lastclose(dev);
 327 }
 328
 329 static const struct file_operations armada_drm_fops = {
 330         .owner                  = THIS_MODULE,
 331         .llseek                 = no_llseek,
 332         .read                   = drm_read,
 333         .poll                   = drm_poll,
 334         .unlocked_ioctl         = drm_ioctl,
 335         .mmap                   = drm_gem_mmap,
 336         .open                   = drm_open,
 337         .release                = drm_release,
 338 };
 339
 340 static struct drm_driver armada_drm_driver = {
 341         .load                   = armada_drm_load,
 342         .open                   = NULL,
 343         .preclose               = NULL,
 344         .postclose              = NULL,
 345         .lastclose              = armada_drm_lastclose,
 346         .unload                 = armada_drm_unload,
 347         .get_vblank_counter     = drm_vblank_count,
 348         .enable_vblank          = armada_drm_enable_vblank,
 349         .disable_vblank         = armada_drm_disable_vblank,
 350         .irq_handler            = armada_drm_irq_handler,
 351         .irq_postinstall        = armada_drm_irq_postinstall,
 352         .irq_uninstall          = armada_drm_irq_uninstall,
 353 #ifdef CONFIG_DEBUG_FS
 354         .debugfs_init           = armada_drm_debugfs_init,
 355         .debugfs_cleanup        = armada_drm_debugfs_cleanup,
 356 #endif
 357         .gem_free_object        = armada_gem_free_object,
 358         .prime_handle_to_fd     = drm_gem_prime_handle_to_fd,
 359         .prime_fd_to_handle     = drm_gem_prime_fd_to_handle,
 360         .gem_prime_export       = armada_gem_prime_export,
 361         .gem_prime_import       = armada_gem_prime_import,
 362         .dumb_create            = armada_gem_dumb_create,
 363         .dumb_map_offset        = armada_gem_dumb_map_offset,
 364         .dumb_destroy           = armada_gem_dumb_destroy,
 365         .gem_vm_ops             = &armada_gem_vm_ops,
 366         .major                  = 1,
 367         .minor                  = 0,
 368         .name                   = "armada-drm",
 369         .desc                   = "Armada SoC DRM",
 370         .date                   = "20120730",
 371         .driver_features        = DRIVER_GEM | DRIVER_MODESET |
 372                                   DRIVER_HAVE_IRQ | DRIVER_PRIME,
 373         .ioctls                 = armada_ioctls,
 374         .fops                   = &armada_drm_fops,
 375 };
 376
 377 static int armada_drm_probe(struct platform_device *pdev)
 378 {
 379         return drm_platform_init(&armada_drm_driver, pdev);
 380 }
 381
 382 static int armada_drm_remove(struct platform_device *pdev)
 383 {
 384         drm_platform_exit(&armada_drm_driver, pdev);
 385         return 0;
 386 }
 387
 388 static const struct platform_device_id armada_drm_platform_ids[] = {
 389         {
 390                 .name           = "armada-drm",
 391                 .driver_data    = (unsigned long)&armada510_ops,
 392         }, {
 393                 .name           = "armada-510-drm",
 394                 .driver_data    = (unsigned long)&armada510_ops,
 395         },
 396         { },
 397 };
 398 MODULE_DEVICE_TABLE(platform, armada_drm_platform_ids);
 399
 400 static struct platform_driver armada_drm_platform_driver = {
 401         .probe  = armada_drm_probe,
 402         .remove = armada_drm_remove,
 403         .driver = {
 404                 .name   = "armada-drm",
 405                 .owner  = THIS_MODULE,
 406         },
 407         .id_table = armada_drm_platform_ids,
 408 };
 409
 410 static int __init armada_drm_init(void)
 411 {
 412         armada_drm_driver.num_ioctls = DRM_ARRAY_SIZE(armada_ioctls);
 413         return platform_driver_register(&armada_drm_platform_driver);
 414 }
 415 module_init(armada_drm_init);
 416
 417 static void __exit armada_drm_exit(void)
 418 {
 419         platform_driver_unregister(&armada_drm_platform_driver);
 420 }
 421 module_exit(armada_drm_exit);
 422
 423 MODULE_AUTHOR("Russell King <rmk+kernel@arm.linux.org.uk>");
 424 MODULE_DESCRIPTION("Armada DRM Driver");
 425 MODULE_LICENSE("GPL");
 426 MODULE_ALIAS("platform:armada-drm");