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_mark_last_busy(&vc4->v3d->pdev->dev);
  65                 pm_runtime_put_autosuspend(&vc4->v3d->pdev->dev);
  66                 break;
  67         case DRM_VC4_PARAM_V3D_IDENT1:
  68                 ret = pm_runtime_get_sync(&vc4->v3d->pdev->dev);
  69                 if (ret < 0)
  70                         return ret;
  71                 args->value = V3D_READ(V3D_IDENT1);
  72                 pm_runtime_mark_last_busy(&vc4->v3d->pdev->dev);
  73                 pm_runtime_put_autosuspend(&vc4->v3d->pdev->dev);
  74                 break;
  75         case DRM_VC4_PARAM_V3D_IDENT2:
  76                 ret = pm_runtime_get_sync(&vc4->v3d->pdev->dev);
  77                 if (ret < 0)
  78                         return ret;
  79                 args->value = V3D_READ(V3D_IDENT2);
  80                 pm_runtime_mark_last_busy(&vc4->v3d->pdev->dev);
  81                 pm_runtime_put_autosuspend(&vc4->v3d->pdev->dev);
  82                 break;
  83         case DRM_VC4_PARAM_SUPPORTS_BRANCHES:
  84         case DRM_VC4_PARAM_SUPPORTS_ETC1:
  85         case DRM_VC4_PARAM_SUPPORTS_THREADED_FS:
  86                 args->value = true;
  87                 break;
  88         default:
  89                 DRM_DEBUG("Unknown parameter %d\n", args->param);
  90                 return -EINVAL;
  91         }
  92
  93         return 0;
  94 }
  95
  96 static void vc4_lastclose(struct drm_device *dev)
  97 {
  98         struct vc4_dev *vc4 = to_vc4_dev(dev);
  99
 100         drm_fbdev_cma_restore_mode(vc4->fbdev);
 101 }
 102
 103 static const struct file_operations vc4_drm_fops = {
 104         .owner = THIS_MODULE,
 105         .open = drm_open,
 106         .release = drm_release,
 107         .unlocked_ioctl = drm_ioctl,
 108         .mmap = vc4_mmap,
 109         .poll = drm_poll,
 110         .read = drm_read,
 111         .compat_ioctl = drm_compat_ioctl,
 112         .llseek = noop_llseek,
 113 };
 114
 115 static const struct drm_ioctl_desc vc4_drm_ioctls[] = {
 116         DRM_IOCTL_DEF_DRV(VC4_SUBMIT_CL, vc4_submit_cl_ioctl, DRM_RENDER_ALLOW),
 117         DRM_IOCTL_DEF_DRV(VC4_WAIT_SEQNO, vc4_wait_seqno_ioctl, DRM_RENDER_ALLOW),
 118         DRM_IOCTL_DEF_DRV(VC4_WAIT_BO, vc4_wait_bo_ioctl, DRM_RENDER_ALLOW),
 119         DRM_IOCTL_DEF_DRV(VC4_CREATE_BO, vc4_create_bo_ioctl, DRM_RENDER_ALLOW),
 120         DRM_IOCTL_DEF_DRV(VC4_MMAP_BO, vc4_mmap_bo_ioctl, DRM_RENDER_ALLOW),
 121         DRM_IOCTL_DEF_DRV(VC4_CREATE_SHADER_BO, vc4_create_shader_bo_ioctl, DRM_RENDER_ALLOW),
 122         DRM_IOCTL_DEF_DRV(VC4_GET_HANG_STATE, vc4_get_hang_state_ioctl,
 123                           DRM_ROOT_ONLY),
 124         DRM_IOCTL_DEF_DRV(VC4_GET_PARAM, vc4_get_param_ioctl, DRM_RENDER_ALLOW),
 125 };
 126
 127 static struct drm_driver vc4_drm_driver = {
 128         .driver_features = (DRIVER_MODESET |
 129                             DRIVER_ATOMIC |
 130                             DRIVER_GEM |
 131                             DRIVER_HAVE_IRQ |
 132                             DRIVER_RENDER |
 133                             DRIVER_PRIME),
 134         .lastclose = vc4_lastclose,
 135         .irq_handler = vc4_irq,
 136         .irq_preinstall = vc4_irq_preinstall,
 137         .irq_postinstall = vc4_irq_postinstall,
 138         .irq_uninstall = vc4_irq_uninstall,
 139
 140         .enable_vblank = vc4_enable_vblank,
 141         .disable_vblank = vc4_disable_vblank,
 142         .get_vblank_counter = drm_vblank_no_hw_counter,
 143         .get_scanout_position = vc4_crtc_get_scanoutpos,
 144         .get_vblank_timestamp = vc4_crtc_get_vblank_timestamp,
 145
 146 #if defined(CONFIG_DEBUG_FS)
 147         .debugfs_init = vc4_debugfs_init,
 148 #endif
 149
 150         .gem_create_object = vc4_create_object,
 151         .gem_free_object_unlocked = vc4_free_object,
 152         .gem_vm_ops = &drm_gem_cma_vm_ops,
 153
 154         .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
 155         .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
 156         .gem_prime_import = drm_gem_prime_import,
 157         .gem_prime_export = vc4_prime_export,
 158         .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
 159         .gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
 160         .gem_prime_vmap = vc4_prime_vmap,
 161         .gem_prime_vunmap = drm_gem_cma_prime_vunmap,
 162         .gem_prime_mmap = vc4_prime_mmap,
 163
 164         .dumb_create = vc4_dumb_create,
 165         .dumb_map_offset = drm_gem_cma_dumb_map_offset,
 166         .dumb_destroy = drm_gem_dumb_destroy,
 167
 168         .ioctls = vc4_drm_ioctls,
 169         .num_ioctls = ARRAY_SIZE(vc4_drm_ioctls),
 170         .fops = &vc4_drm_fops,
 171
 172         .name = DRIVER_NAME,
 173         .desc = DRIVER_DESC,
 174         .date = DRIVER_DATE,
 175         .major = DRIVER_MAJOR,
 176         .minor = DRIVER_MINOR,
 177         .patchlevel = DRIVER_PATCHLEVEL,
 178 };
 179
 180 static int compare_dev(struct device *dev, void *data)
 181 {
 182         return dev == data;
 183 }
 184
 185 static void vc4_match_add_drivers(struct device *dev,
 186                                   struct component_match **match,
 187                                   struct platform_driver *const *drivers,
 188                                   int count)
 189 {
 190         int i;
 191
 192         for (i = 0; i < count; i++) {
 193                 struct device_driver *drv = &drivers[i]->driver;
 194                 struct device *p = NULL, *d;
 195
 196                 while ((d = bus_find_device(&platform_bus_type, p, drv,
 197                                             (void *)platform_bus_type.match))) {
 198                         put_device(p);
 199                         component_match_add(dev, match, compare_dev, d);
 200                         p = d;
 201                 }
 202                 put_device(p);
 203         }
 204 }
 205
 206 static void vc4_kick_out_firmware_fb(void)
 207 {
 208         struct apertures_struct *ap;
 209
 210         ap = alloc_apertures(1);
 211         if (!ap)
 212                 return;
 213
 214         /* Since VC4 is a UMA device, the simplefb node may have been
 215          * located anywhere in memory.
 216          */
 217         ap->ranges[0].base = 0;
 218         ap->ranges[0].size = ~0;
 219
 220         drm_fb_helper_remove_conflicting_framebuffers(ap, "vc4drmfb", false);
 221         kfree(ap);
 222 }
 223
 224 static int vc4_drm_bind(struct device *dev)
 225 {
 226         struct platform_device *pdev = to_platform_device(dev);
 227         struct drm_device *drm;
 228         struct vc4_dev *vc4;
 229         int ret = 0;
 230
 231         dev->coherent_dma_mask = DMA_BIT_MASK(32);
 232
 233         vc4 = devm_kzalloc(dev, sizeof(*vc4), GFP_KERNEL);
 234         if (!vc4)
 235                 return -ENOMEM;
 236
 237         drm = drm_dev_alloc(&vc4_drm_driver, dev);
 238         if (IS_ERR(drm))
 239                 return PTR_ERR(drm);
 240         platform_set_drvdata(pdev, drm);
 241         vc4->dev = drm;
 242         drm->dev_private = vc4;
 243
 244         vc4_bo_cache_init(drm);
 245
 246         drm_mode_config_init(drm);
 247
 248         vc4_gem_init(drm);
 249
 250         ret = component_bind_all(dev, drm);
 251         if (ret)
 252                 goto gem_destroy;
 253
 254         vc4_kick_out_firmware_fb();
 255
 256         ret = drm_dev_register(drm, 0);
 257         if (ret < 0)
 258                 goto unbind_all;
 259
 260         vc4_kms_load(drm);
 261
 262         return 0;
 263
 264 unbind_all:
 265         component_unbind_all(dev, drm);
 266 gem_destroy:
 267         vc4_gem_destroy(drm);
 268         drm_dev_unref(drm);
 269         vc4_bo_cache_destroy(drm);
 270         return ret;
 271 }
 272
 273 static void vc4_drm_unbind(struct device *dev)
 274 {
 275         struct platform_device *pdev = to_platform_device(dev);
 276         struct drm_device *drm = platform_get_drvdata(pdev);
 277         struct vc4_dev *vc4 = to_vc4_dev(drm);
 278
 279         drm_dev_unregister(drm);
 280
 281         if (vc4->fbdev)
 282                 drm_fbdev_cma_fini(vc4->fbdev);
 283
 284         drm_mode_config_cleanup(drm);
 285
 286         drm_dev_unref(drm);
 287 }
 288
 289 static const struct component_master_ops vc4_drm_ops = {
 290         .bind = vc4_drm_bind,
 291         .unbind = vc4_drm_unbind,
 292 };
 293
 294 static struct platform_driver *const component_drivers[] = {
 295         &vc4_hdmi_driver,
 296         &vc4_vec_driver,
 297         &vc4_dpi_driver,
 298         &vc4_dsi_driver,
 299         &vc4_hvs_driver,
 300         &vc4_crtc_driver,
 301         &vc4_v3d_driver,
 302 };
 303
 304 static int vc4_platform_drm_probe(struct platform_device *pdev)
 305 {
 306         struct component_match *match = NULL;
 307         struct device *dev = &pdev->dev;
 308
 309         vc4_match_add_drivers(dev, &match,
 310                               component_drivers, ARRAY_SIZE(component_drivers));
 311
 312         return component_master_add_with_match(dev, &vc4_drm_ops, match);
 313 }
 314
 315 static int vc4_platform_drm_remove(struct platform_device *pdev)
 316 {
 317         component_master_del(&pdev->dev, &vc4_drm_ops);
 318
 319         return 0;
 320 }
 321
 322 static const struct of_device_id vc4_of_match[] = {
 323         { .compatible = "brcm,bcm2835-vc4", },
 324         {},
 325 };
 326 MODULE_DEVICE_TABLE(of, vc4_of_match);
 327
 328 static struct platform_driver vc4_platform_driver = {
 329         .probe          = vc4_platform_drm_probe,
 330         .remove         = vc4_platform_drm_remove,
 331         .driver         = {
 332                 .name   = "vc4-drm",
 333                 .of_match_table = vc4_of_match,
 334         },
 335 };
 336
 337 static int __init vc4_drm_register(void)
 338 {
 339         int i, ret;
 340
 341         for (i = 0; i < ARRAY_SIZE(component_drivers); i++) {
 342                 ret = platform_driver_register(component_drivers[i]);
 343                 if (ret) {
 344                         while (--i >= 0)
 345                                 platform_driver_unregister(component_drivers[i]);
 346                         return ret;
 347                 }
 348         }
 349         return platform_driver_register(&vc4_platform_driver);
 350 }
 351
 352 static void __exit vc4_drm_unregister(void)
 353 {
 354         int i;
 355
 356         for (i = ARRAY_SIZE(component_drivers) - 1; i >= 0; i--)
 357                 platform_driver_unregister(component_drivers[i]);
 358
 359         platform_driver_unregister(&vc4_platform_driver);
 360 }
 361
 362 module_init(vc4_drm_register);
 363 module_exit(vc4_drm_unregister);
 364
 365 MODULE_ALIAS("platform:vc4-drm");
 366 MODULE_DESCRIPTION("Broadcom VC4 DRM Driver");
 367 MODULE_AUTHOR("Eric Anholt <[email protected]>");
 368 MODULE_LICENSE("GPL v2");