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         WARN_ON(!kfifo_put(&priv->fb_unref, fb));
  72         schedule_work(&priv->fb_unref_work);
  73 }
  74
  75 void armada_drm_queue_unref_work(struct drm_device *dev,
  76         struct drm_framebuffer *fb)
  77 {
  78         unsigned long flags;
  79
  80         spin_lock_irqsave(&dev->event_lock, flags);
  81         __armada_drm_queue_unref_work(dev, fb);
  82         spin_unlock_irqrestore(&dev->event_lock, flags);
  83 }
  84
  85 static int armada_drm_load(struct drm_device *dev, unsigned long flags)
  86 {
  87         const struct platform_device_id *id;
  88         struct armada_private *priv;
  89         struct resource *res[ARRAY_SIZE(priv->dcrtc)];
  90         struct resource *mem = NULL;
  91         int ret, n, i;
  92
  93         memset(res, 0, sizeof(res));
  94
  95         for (n = i = 0; ; n++) {
  96                 struct resource *r = platform_get_resource(dev->platformdev,
  97                                                            IORESOURCE_MEM, n);
  98                 if (!r)
  99                         break;
 100
 101                 /* Resources above 64K are graphics memory */
 102                 if (resource_size(r) > SZ_64K)
 103                         mem = r;
 104                 else if (i < ARRAY_SIZE(priv->dcrtc))
 105                         res[i++] = r;
 106                 else
 107                         return -EINVAL;
 108         }
 109
 110         if (!res[0] || !mem)
 111                 return -ENXIO;
 112
 113         if (!devm_request_mem_region(dev->dev, mem->start,
 114                         resource_size(mem), "armada-drm"))
 115                 return -EBUSY;
 116
 117         priv = devm_kzalloc(dev->dev, sizeof(*priv), GFP_KERNEL);
 118         if (!priv) {
 119                 DRM_ERROR("failed to allocate private\n");
 120                 return -ENOMEM;
 121         }
 122
 123         platform_set_drvdata(dev->platformdev, dev);
 124         dev->dev_private = priv;
 125
 126         /* Get the implementation specific driver data. */
 127         id = platform_get_device_id(dev->platformdev);
 128         if (!id)
 129                 return -ENXIO;
 130
 131         priv->variant = (struct armada_variant *)id->driver_data;
 132
 133         ret = priv->variant->init(priv, dev->dev);
 134         if (ret)
 135                 return ret;
 136
 137         INIT_WORK(&priv->fb_unref_work, armada_drm_unref_work);
 138         INIT_KFIFO(priv->fb_unref);
 139
 140         /* Mode setting support */
 141         drm_mode_config_init(dev);
 142         dev->mode_config.min_width = 320;
 143         dev->mode_config.min_height = 200;
 144
 145         /*
 146          * With vscale enabled, the maximum width is 1920 due to the
 147          * 1920 by 3 lines RAM
 148          */
 149         dev->mode_config.max_width = 1920;
 150         dev->mode_config.max_height = 2048;
 151
 152         dev->mode_config.preferred_depth = 24;
 153         dev->mode_config.funcs = &armada_drm_mode_config_funcs;
 154         drm_mm_init(&priv->linear, mem->start, resource_size(mem));
 155
 156         /* Create all LCD controllers */
 157         for (n = 0; n < ARRAY_SIZE(priv->dcrtc); n++) {
 158                 int irq;
 159
 160                 if (!res[n])
 161                         break;
 162
 163                 irq = platform_get_irq(dev->platformdev, n);
 164                 if (irq < 0)
 165                         goto err_kms;
 166
 167                 ret = armada_drm_crtc_create(dev, res[n], irq);
 168                 if (ret)
 169                         goto err_kms;
 170         }
 171
 172 #ifdef CONFIG_DRM_ARMADA_TDA1998X
 173         ret = armada_drm_connector_slave_create(dev, &tda19988_config);
 174         if (ret)
 175                 goto err_kms;
 176 #endif
 177
 178         ret = drm_vblank_init(dev, dev->mode_config.num_crtc);
 179         if (ret)
 180                 goto err_kms;
 181
 182         dev->vblank_disable_allowed = 1;
 183
 184         ret = armada_fbdev_init(dev);
 185         if (ret)
 186                 goto err_kms;
 187
 188         drm_kms_helper_poll_init(dev);
 189
 190         return 0;
 191
 192  err_kms:
 193         drm_mode_config_cleanup(dev);
 194         drm_mm_takedown(&priv->linear);
 195         flush_work(&priv->fb_unref_work);
 196
 197         return ret;
 198 }
 199
 200 static int armada_drm_unload(struct drm_device *dev)
 201 {
 202         struct armada_private *priv = dev->dev_private;
 203
 204         drm_kms_helper_poll_fini(dev);
 205         armada_fbdev_fini(dev);
 206         drm_mode_config_cleanup(dev);
 207         drm_mm_takedown(&priv->linear);
 208         flush_work(&priv->fb_unref_work);
 209         dev->dev_private = NULL;
 210
 211         return 0;
 212 }
 213
 214 void armada_drm_vbl_event_add(struct armada_crtc *dcrtc,
 215         struct armada_vbl_event *evt)
 216 {
 217         unsigned long flags;
 218
 219         spin_lock_irqsave(&dcrtc->irq_lock, flags);
 220         if (list_empty(&evt->node)) {
 221                 list_add_tail(&evt->node, &dcrtc->vbl_list);
 222
 223                 drm_vblank_get(dcrtc->crtc.dev, dcrtc->num);
 224         }
 225         spin_unlock_irqrestore(&dcrtc->irq_lock, flags);
 226 }
 227
 228 void armada_drm_vbl_event_remove(struct armada_crtc *dcrtc,
 229         struct armada_vbl_event *evt)
 230 {
 231         if (!list_empty(&evt->node)) {
 232                 list_del_init(&evt->node);
 233                 drm_vblank_put(dcrtc->crtc.dev, dcrtc->num);
 234         }
 235 }
 236
 237 void armada_drm_vbl_event_remove_unlocked(struct armada_crtc *dcrtc,
 238         struct armada_vbl_event *evt)
 239 {
 240         unsigned long flags;
 241
 242         spin_lock_irqsave(&dcrtc->irq_lock, flags);
 243         armada_drm_vbl_event_remove(dcrtc, evt);
 244         spin_unlock_irqrestore(&dcrtc->irq_lock, flags);
 245 }
 246
 247 /* These are called under the vbl_lock. */
 248 static int armada_drm_enable_vblank(struct drm_device *dev, int crtc)
 249 {
 250         struct armada_private *priv = dev->dev_private;
 251         armada_drm_crtc_enable_irq(priv->dcrtc[crtc], VSYNC_IRQ_ENA);
 252         return 0;
 253 }
 254
 255 static void armada_drm_disable_vblank(struct drm_device *dev, int crtc)
 256 {
 257         struct armada_private *priv = dev->dev_private;
 258         armada_drm_crtc_disable_irq(priv->dcrtc[crtc], VSYNC_IRQ_ENA);
 259 }
 260
 261 static struct drm_ioctl_desc armada_ioctls[] = {
 262         DRM_IOCTL_DEF_DRV(ARMADA_GEM_CREATE, armada_gem_create_ioctl,
 263                 DRM_UNLOCKED),
 264         DRM_IOCTL_DEF_DRV(ARMADA_GEM_MMAP, armada_gem_mmap_ioctl,
 265                 DRM_UNLOCKED),
 266         DRM_IOCTL_DEF_DRV(ARMADA_GEM_PWRITE, armada_gem_pwrite_ioctl,
 267                 DRM_UNLOCKED),
 268 };
 269
 270 static void armada_drm_lastclose(struct drm_device *dev)
 271 {
 272         armada_fbdev_lastclose(dev);
 273 }
 274
 275 static const struct file_operations armada_drm_fops = {
 276         .owner                  = THIS_MODULE,
 277         .llseek                 = no_llseek,
 278         .read                   = drm_read,
 279         .poll                   = drm_poll,
 280         .unlocked_ioctl         = drm_ioctl,
 281         .mmap                   = drm_gem_mmap,
 282         .open                   = drm_open,
 283         .release                = drm_release,
 284 };
 285
 286 static struct drm_driver armada_drm_driver = {
 287         .load                   = armada_drm_load,
 288         .open                   = NULL,
 289         .preclose               = NULL,
 290         .postclose              = NULL,
 291         .lastclose              = armada_drm_lastclose,
 292         .unload                 = armada_drm_unload,
 293         .get_vblank_counter     = drm_vblank_count,
 294         .enable_vblank          = armada_drm_enable_vblank,
 295         .disable_vblank         = armada_drm_disable_vblank,
 296 #ifdef CONFIG_DEBUG_FS
 297         .debugfs_init           = armada_drm_debugfs_init,
 298         .debugfs_cleanup        = armada_drm_debugfs_cleanup,
 299 #endif
 300         .gem_free_object        = armada_gem_free_object,
 301         .prime_handle_to_fd     = drm_gem_prime_handle_to_fd,
 302         .prime_fd_to_handle     = drm_gem_prime_fd_to_handle,
 303         .gem_prime_export       = armada_gem_prime_export,
 304         .gem_prime_import       = armada_gem_prime_import,
 305         .dumb_create            = armada_gem_dumb_create,
 306         .dumb_map_offset        = armada_gem_dumb_map_offset,
 307         .dumb_destroy           = armada_gem_dumb_destroy,
 308         .gem_vm_ops             = &armada_gem_vm_ops,
 309         .major                  = 1,
 310         .minor                  = 0,
 311         .name                   = "armada-drm",
 312         .desc                   = "Armada SoC DRM",
 313         .date                   = "20120730",
 314         .driver_features        = DRIVER_GEM | DRIVER_MODESET |
 315                                   DRIVER_PRIME,
 316         .ioctls                 = armada_ioctls,
 317         .fops                   = &armada_drm_fops,
 318 };
 319
 320 static int armada_drm_probe(struct platform_device *pdev)
 321 {
 322         return drm_platform_init(&armada_drm_driver, pdev);
 323 }
 324
 325 static int armada_drm_remove(struct platform_device *pdev)
 326 {
 327         drm_put_dev(platform_get_drvdata(pdev));
 328         return 0;
 329 }
 330
 331 static const struct platform_device_id armada_drm_platform_ids[] = {
 332         {
 333                 .name           = "armada-drm",
 334                 .driver_data    = (unsigned long)&armada510_ops,
 335         }, {
 336                 .name           = "armada-510-drm",
 337                 .driver_data    = (unsigned long)&armada510_ops,
 338         },
 339         { },
 340 };
 341 MODULE_DEVICE_TABLE(platform, armada_drm_platform_ids);
 342
 343 static struct platform_driver armada_drm_platform_driver = {
 344         .probe  = armada_drm_probe,
 345         .remove = armada_drm_remove,
 346         .driver = {
 347                 .name   = "armada-drm",
 348                 .owner  = THIS_MODULE,
 349         },
 350         .id_table = armada_drm_platform_ids,
 351 };
 352
 353 static int __init armada_drm_init(void)
 354 {
 355         armada_drm_driver.num_ioctls = ARRAY_SIZE(armada_ioctls);
 356         return platform_driver_register(&armada_drm_platform_driver);
 357 }
 358 module_init(armada_drm_init);
 359
 360 static void __exit armada_drm_exit(void)
 361 {
 362         platform_driver_unregister(&armada_drm_platform_driver);
 363 }
 364 module_exit(armada_drm_exit);
 365
 366 MODULE_AUTHOR("Russell King <rmk+kernel@arm.linux.org.uk>");
 367 MODULE_DESCRIPTION("Armada DRM Driver");
 368 MODULE_LICENSE("GPL");
 369 MODULE_ALIAS("platform:armada-drm");