drivers/gpu/drm/vc4/vc4_drv.c

   1 /*
   2  * Copyright (C) 2014-2015 Broadcom
   3  * Copyright (C) 2013 Red Hat
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License version 2 as
   7  * published by the Free Software Foundation.
   8  */
   9
  10 #include <linux/clk.h>
  11 #include <linux/component.h>
  12 #include <linux/device.h>
  13 #include <linux/io.h>
  14 #include <linux/module.h>
  15 #include <linux/of_platform.h>
  16 #include <linux/platform_device.h>
  17 #include <linux/pm_runtime.h>
  18 #include "drm_fb_cma_helper.h"
  19 #include <drm/drm_fb_helper.h>
  20
  21 #include "uapi/drm/vc4_drm.h"
  22 #include "vc4_drv.h"
  23 #include "vc4_regs.h"
  24
  25 #define DRIVER_NAME "vc4"
  26 #define DRIVER_DESC "Broadcom VC4 graphics"
  27 #define DRIVER_DATE "20140616"
  28 #define DRIVER_MAJOR 0
  29 #define DRIVER_MINOR 0
  30 #define DRIVER_PATCHLEVEL 0
  31
  32 /* Helper function for mapping the regs on a platform device. */
  33 void __iomem *vc4_ioremap_regs(struct platform_device *dev, int index)
  34 {
  35         struct resource *res;
  36         void __iomem *map;
  37
  38         res = platform_get_resource(dev, IORESOURCE_MEM, index);
  39         map = devm_ioremap_resource(&dev->dev, res);
  40         if (IS_ERR(map)) {
  41                 DRM_ERROR("Failed to map registers: %ld\n", PTR_ERR(map));
  42                 return map;
  43         }
  44
  45         return map;
  46 }
  47
  48 static int vc4_get_param_ioctl(struct drm_device *dev, void *data,
  49                                struct drm_file *file_priv)
  50 {
  51         struct vc4_dev *vc4 = to_vc4_dev(dev);
  52         struct drm_vc4_get_param *args = data;
  53         int ret;
  54
  55         if (args->pad != 0)
  56                 return -EINVAL;
  57
  58         switch (args->param) {
  59         case DRM_VC4_PARAM_V3D_IDENT0:
  60                 ret = pm_runtime_get_sync(&vc4->v3d->pdev->dev);
  61                 if (ret < 0)
  62                         return ret;
  63                 args->value = V3D_READ(V3D_IDENT0);
  64                 pm_runtime_put(&vc4->v3d->pdev->dev);
  65                 break;
  66         case DRM_VC4_PARAM_V3D_IDENT1:
  67                 ret = pm_runtime_get_sync(&vc4->v3d->pdev->dev);
  68                 if (ret < 0)
  69                         return ret;
  70                 args->value = V3D_READ(V3D_IDENT1);
  71                 pm_runtime_put(&vc4->v3d->pdev->dev);
  72                 break;
  73         case DRM_VC4_PARAM_V3D_IDENT2:
  74                 ret = pm_runtime_get_sync(&vc4->v3d->pdev->dev);
  75                 if (ret < 0)
  76                         return ret;
  77                 args->value = V3D_READ(V3D_IDENT2);
  78                 pm_runtime_put(&vc4->v3d->pdev->dev);
  79                 break;
  80         case DRM_VC4_PARAM_SUPPORTS_BRANCHES:
  81                 args->value = true;
  82                 break;
  83         default:
  84                 DRM_DEBUG("Unknown parameter %d\n", args->param);
  85                 return -EINVAL;
  86         }
  87
  88         return 0;
  89 }
  90
  91 static void vc4_lastclose(struct drm_device *dev)
  92 {
  93         struct vc4_dev *vc4 = to_vc4_dev(dev);
  94
  95         drm_fbdev_cma_restore_mode(vc4->fbdev);
  96 }
  97
  98 static const struct file_operations vc4_drm_fops = {
  99         .owner = THIS_MODULE,
 100         .open = drm_open,
 101         .release = drm_release,
 102         .unlocked_ioctl = drm_ioctl,
 103         .mmap = vc4_mmap,
 104         .poll = drm_poll,
 105         .read = drm_read,
 106 #ifdef CONFIG_COMPAT
 107         .compat_ioctl = drm_compat_ioctl,
 108 #endif
 109         .llseek = noop_llseek,
 110 };
 111
 112 static const struct drm_ioctl_desc vc4_drm_ioctls[] = {
 113         DRM_IOCTL_DEF_DRV(VC4_SUBMIT_CL, vc4_submit_cl_ioctl, DRM_RENDER_ALLOW),
 114         DRM_IOCTL_DEF_DRV(VC4_WAIT_SEQNO, vc4_wait_seqno_ioctl, DRM_RENDER_ALLOW),
 115         DRM_IOCTL_DEF_DRV(VC4_WAIT_BO, vc4_wait_bo_ioctl, DRM_RENDER_ALLOW),
 116         DRM_IOCTL_DEF_DRV(VC4_CREATE_BO, vc4_create_bo_ioctl, DRM_RENDER_ALLOW),
 117         DRM_IOCTL_DEF_DRV(VC4_MMAP_BO, vc4_mmap_bo_ioctl, DRM_RENDER_ALLOW),
 118         DRM_IOCTL_DEF_DRV(VC4_CREATE_SHADER_BO, vc4_create_shader_bo_ioctl, DRM_RENDER_ALLOW),
 119         DRM_IOCTL_DEF_DRV(VC4_GET_HANG_STATE, vc4_get_hang_state_ioctl,
 120                           DRM_ROOT_ONLY),
 121         DRM_IOCTL_DEF_DRV(VC4_GET_PARAM, vc4_get_param_ioctl, DRM_RENDER_ALLOW),
 122 };
 123
 124 static struct drm_driver vc4_drm_driver = {
 125         .driver_features = (DRIVER_MODESET |
 126                             DRIVER_ATOMIC |
 127                             DRIVER_GEM |
 128                             DRIVER_HAVE_IRQ |
 129                             DRIVER_RENDER |
 130                             DRIVER_PRIME),
 131         .lastclose = vc4_lastclose,
 132         .irq_handler = vc4_irq,
 133         .irq_preinstall = vc4_irq_preinstall,
 134         .irq_postinstall = vc4_irq_postinstall,
 135         .irq_uninstall = vc4_irq_uninstall,
 136
 137         .enable_vblank = vc4_enable_vblank,
 138         .disable_vblank = vc4_disable_vblank,
 139         .get_vblank_counter = drm_vblank_no_hw_counter,
 140         .get_scanout_position = vc4_crtc_get_scanoutpos,
 141         .get_vblank_timestamp = vc4_crtc_get_vblank_timestamp,
 142
 143 #if defined(CONFIG_DEBUG_FS)
 144         .debugfs_init = vc4_debugfs_init,
 145         .debugfs_cleanup = vc4_debugfs_cleanup,
 146 #endif
 147
 148         .gem_create_object = vc4_create_object,
 149         .gem_free_object_unlocked = vc4_free_object,
 150         .gem_vm_ops = &drm_gem_cma_vm_ops,
 151
 152         .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
 153         .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
 154         .gem_prime_import = drm_gem_prime_import,
 155         .gem_prime_export = vc4_prime_export,
 156         .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
 157         .gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
 158         .gem_prime_vmap = vc4_prime_vmap,
 159         .gem_prime_vunmap = drm_gem_cma_prime_vunmap,
 160         .gem_prime_mmap = vc4_prime_mmap,
 161
 162         .dumb_create = vc4_dumb_create,
 163         .dumb_map_offset = drm_gem_cma_dumb_map_offset,
 164         .dumb_destroy = drm_gem_dumb_destroy,
 165
 166         .ioctls = vc4_drm_ioctls,
 167         .num_ioctls = ARRAY_SIZE(vc4_drm_ioctls),
 168         .fops = &vc4_drm_fops,
 169
 170         .name = DRIVER_NAME,
 171         .desc = DRIVER_DESC,
 172         .date = DRIVER_DATE,
 173         .major = DRIVER_MAJOR,
 174         .minor = DRIVER_MINOR,
 175         .patchlevel = DRIVER_PATCHLEVEL,
 176 };
 177
 178 static int compare_dev(struct device *dev, void *data)
 179 {
 180         return dev == data;
 181 }
 182
 183 static void vc4_match_add_drivers(struct device *dev,
 184                                   struct component_match **match,
 185                                   struct platform_driver *const *drivers,
 186                                   int count)
 187 {
 188         int i;
 189
 190         for (i = 0; i < count; i++) {
 191                 struct device_driver *drv = &drivers[i]->driver;
 192                 struct device *p = NULL, *d;
 193
 194                 while ((d = bus_find_device(&platform_bus_type, p, drv,
 195                                             (void *)platform_bus_type.match))) {
 196                         put_device(p);
 197                         component_match_add(dev, match, compare_dev, d);
 198                         p = d;
 199                 }
 200                 put_device(p);
 201         }
 202 }
 203
 204 static void vc4_kick_out_firmware_fb(void)
 205 {
 206         struct apertures_struct *ap;
 207
 208         ap = alloc_apertures(1);
 209         if (!ap)
 210                 return;
 211
 212         /* Since VC4 is a UMA device, the simplefb node may have been
 213          * located anywhere in memory.
 214          */
 215         ap->ranges[0].base = 0;
 216         ap->ranges[0].size = ~0;
 217
 218         drm_fb_helper_remove_conflicting_framebuffers(ap, "vc4drmfb", false);
 219         kfree(ap);
 220 }
 221
 222 static int vc4_drm_bind(struct device *dev)
 223 {
 224         struct platform_device *pdev = to_platform_device(dev);
 225         struct drm_device *drm;
 226         struct vc4_dev *vc4;
 227         int ret = 0;
 228
 229         dev->coherent_dma_mask = DMA_BIT_MASK(32);
 230
 231         vc4 = devm_kzalloc(dev, sizeof(*vc4), GFP_KERNEL);
 232         if (!vc4)
 233                 return -ENOMEM;
 234
 235         drm = drm_dev_alloc(&vc4_drm_driver, dev);
 236         if (IS_ERR(drm))
 237                 return PTR_ERR(drm);
 238         platform_set_drvdata(pdev, drm);
 239         vc4->dev = drm;
 240         drm->dev_private = vc4;
 241
 242         vc4_bo_cache_init(drm);
 243
 244         drm_mode_config_init(drm);
 245
 246         vc4_gem_init(drm);
 247
 248         ret = component_bind_all(dev, drm);
 249         if (ret)
 250                 goto gem_destroy;
 251
 252         vc4_kick_out_firmware_fb();
 253
 254         ret = drm_dev_register(drm, 0);
 255         if (ret < 0)
 256                 goto unbind_all;
 257
 258         vc4_kms_load(drm);
 259
 260         return 0;
 261
 262 unbind_all:
 263         component_unbind_all(dev, drm);
 264 gem_destroy:
 265         vc4_gem_destroy(drm);
 266         drm_dev_unref(drm);
 267         vc4_bo_cache_destroy(drm);
 268         return ret;
 269 }
 270
 271 static void vc4_drm_unbind(struct device *dev)
 272 {
 273         struct platform_device *pdev = to_platform_device(dev);
 274         struct drm_device *drm = platform_get_drvdata(pdev);
 275         struct vc4_dev *vc4 = to_vc4_dev(drm);
 276
 277         if (vc4->fbdev)
 278                 drm_fbdev_cma_fini(vc4->fbdev);
 279
 280         drm_mode_config_cleanup(drm);
 281
 282         drm_put_dev(drm);
 283 }
 284
 285 static const struct component_master_ops vc4_drm_ops = {
 286         .bind = vc4_drm_bind,
 287         .unbind = vc4_drm_unbind,
 288 };
 289
 290 static struct platform_driver *const component_drivers[] = {
 291         &vc4_hdmi_driver,
 292         &vc4_dpi_driver,
 293         &vc4_hvs_driver,
 294         &vc4_crtc_driver,
 295         &vc4_v3d_driver,
 296 };
 297
 298 static int vc4_platform_drm_probe(struct platform_device *pdev)
 299 {
 300         struct component_match *match = NULL;
 301         struct device *dev = &pdev->dev;
 302
 303         vc4_match_add_drivers(dev, &match,
 304                               component_drivers, ARRAY_SIZE(component_drivers));
 305
 306         return component_master_add_with_match(dev, &vc4_drm_ops, match);
 307 }
 308
 309 static int vc4_platform_drm_remove(struct platform_device *pdev)
 310 {
 311         component_master_del(&pdev->dev, &vc4_drm_ops);
 312
 313         return 0;
 314 }
 315
 316 static const struct of_device_id vc4_of_match[] = {
 317         { .compatible = "brcm,bcm2835-vc4", },
 318         {},
 319 };
 320 MODULE_DEVICE_TABLE(of, vc4_of_match);
 321
 322 static struct platform_driver vc4_platform_driver = {
 323         .probe          = vc4_platform_drm_probe,
 324         .remove         = vc4_platform_drm_remove,
 325         .driver         = {
 326                 .name   = "vc4-drm",
 327                 .of_match_table = vc4_of_match,
 328         },
 329 };
 330
 331 static int __init vc4_drm_register(void)
 332 {
 333         int i, ret;
 334
 335         for (i = 0; i < ARRAY_SIZE(component_drivers); i++) {
 336                 ret = platform_driver_register(component_drivers[i]);
 337                 if (ret) {
 338                         while (--i >= 0)
 339                                 platform_driver_unregister(component_drivers[i]);
 340                         return ret;
 341                 }
 342         }
 343         return platform_driver_register(&vc4_platform_driver);
 344 }
 345
 346 static void __exit vc4_drm_unregister(void)
 347 {
 348         int i;
 349
 350         for (i = ARRAY_SIZE(component_drivers) - 1; i >= 0; i--)
 351                 platform_driver_unregister(component_drivers[i]);
 352
 353         platform_driver_unregister(&vc4_platform_driver);
 354 }
 355
 356 module_init(vc4_drm_register);
 357 module_exit(vc4_drm_unregister);
 358
 359 MODULE_ALIAS("platform:vc4-drm");
 360 MODULE_DESCRIPTION("Broadcom VC4 DRM Driver");
 361 MODULE_AUTHOR("Eric Anholt <eric@anholt.net>");
 362 MODULE_LICENSE("GPL v2");