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 "drm_fb_cma_helper.h"
  18
  19 #include "uapi/drm/vc4_drm.h"
  20 #include "vc4_drv.h"
  21 #include "vc4_regs.h"
  22
  23 #define DRIVER_NAME "vc4"
  24 #define DRIVER_DESC "Broadcom VC4 graphics"
  25 #define DRIVER_DATE "20140616"
  26 #define DRIVER_MAJOR 0
  27 #define DRIVER_MINOR 0
  28 #define DRIVER_PATCHLEVEL 0
  29
  30 /* Helper function for mapping the regs on a platform device. */
  31 void __iomem *vc4_ioremap_regs(struct platform_device *dev, int index)
  32 {
  33         struct resource *res;
  34         void __iomem *map;
  35
  36         res = platform_get_resource(dev, IORESOURCE_MEM, index);
  37         map = devm_ioremap_resource(&dev->dev, res);
  38         if (IS_ERR(map)) {
  39                 DRM_ERROR("Failed to map registers: %ld\n", PTR_ERR(map));
  40                 return map;
  41         }
  42
  43         return map;
  44 }
  45
  46 static void vc4_drm_preclose(struct drm_device *dev, struct drm_file *file)
  47 {
  48         struct drm_crtc *crtc;
  49
  50         list_for_each_entry(crtc, &dev->mode_config.crtc_list, head)
  51                 vc4_cancel_page_flip(crtc, file);
  52 }
  53
  54 static void vc4_lastclose(struct drm_device *dev)
  55 {
  56         struct vc4_dev *vc4 = to_vc4_dev(dev);
  57
  58         if (vc4->fbdev)
  59                 drm_fbdev_cma_restore_mode(vc4->fbdev);
  60 }
  61
  62 static const struct file_operations vc4_drm_fops = {
  63         .owner = THIS_MODULE,
  64         .open = drm_open,
  65         .release = drm_release,
  66         .unlocked_ioctl = drm_ioctl,
  67         .mmap = vc4_mmap,
  68         .poll = drm_poll,
  69         .read = drm_read,
  70 #ifdef CONFIG_COMPAT
  71         .compat_ioctl = drm_compat_ioctl,
  72 #endif
  73         .llseek = noop_llseek,
  74 };
  75
  76 static const struct drm_ioctl_desc vc4_drm_ioctls[] = {
  77         DRM_IOCTL_DEF_DRV(VC4_CREATE_BO, vc4_create_bo_ioctl, 0),
  78         DRM_IOCTL_DEF_DRV(VC4_MMAP_BO, vc4_mmap_bo_ioctl, 0),
  79         DRM_IOCTL_DEF_DRV(VC4_CREATE_SHADER_BO, vc4_create_shader_bo_ioctl, 0),
  80 };
  81
  82 static struct drm_driver vc4_drm_driver = {
  83         .driver_features = (DRIVER_MODESET |
  84                             DRIVER_ATOMIC |
  85                             DRIVER_GEM |
  86                             DRIVER_PRIME),
  87         .lastclose = vc4_lastclose,
  88         .preclose = vc4_drm_preclose,
  89
  90         .enable_vblank = vc4_enable_vblank,
  91         .disable_vblank = vc4_disable_vblank,
  92         .get_vblank_counter = drm_vblank_count,
  93
  94 #if defined(CONFIG_DEBUG_FS)
  95         .debugfs_init = vc4_debugfs_init,
  96         .debugfs_cleanup = vc4_debugfs_cleanup,
  97 #endif
  98
  99         .gem_create_object = vc4_create_object,
 100         .gem_free_object = vc4_free_object,
 101         .gem_vm_ops = &drm_gem_cma_vm_ops,
 102
 103         .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
 104         .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
 105         .gem_prime_import = drm_gem_prime_import,
 106         .gem_prime_export = vc4_prime_export,
 107         .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
 108         .gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
 109         .gem_prime_vmap = vc4_prime_vmap,
 110         .gem_prime_vunmap = drm_gem_cma_prime_vunmap,
 111         .gem_prime_mmap = vc4_prime_mmap,
 112
 113         .dumb_create = vc4_dumb_create,
 114         .dumb_map_offset = drm_gem_cma_dumb_map_offset,
 115         .dumb_destroy = drm_gem_dumb_destroy,
 116
 117         .ioctls = vc4_drm_ioctls,
 118         .num_ioctls = ARRAY_SIZE(vc4_drm_ioctls),
 119         .fops = &vc4_drm_fops,
 120
 121         .name = DRIVER_NAME,
 122         .desc = DRIVER_DESC,
 123         .date = DRIVER_DATE,
 124         .major = DRIVER_MAJOR,
 125         .minor = DRIVER_MINOR,
 126         .patchlevel = DRIVER_PATCHLEVEL,
 127 };
 128
 129 static int compare_dev(struct device *dev, void *data)
 130 {
 131         return dev == data;
 132 }
 133
 134 static void vc4_match_add_drivers(struct device *dev,
 135                                   struct component_match **match,
 136                                   struct platform_driver *const *drivers,
 137                                   int count)
 138 {
 139         int i;
 140
 141         for (i = 0; i < count; i++) {
 142                 struct device_driver *drv = &drivers[i]->driver;
 143                 struct device *p = NULL, *d;
 144
 145                 while ((d = bus_find_device(&platform_bus_type, p, drv,
 146                                             (void *)platform_bus_type.match))) {
 147                         put_device(p);
 148                         component_match_add(dev, match, compare_dev, d);
 149                         p = d;
 150                 }
 151                 put_device(p);
 152         }
 153 }
 154
 155 static int vc4_drm_bind(struct device *dev)
 156 {
 157         struct platform_device *pdev = to_platform_device(dev);
 158         struct drm_device *drm;
 159         struct drm_connector *connector;
 160         struct vc4_dev *vc4;
 161         int ret = 0;
 162
 163         dev->coherent_dma_mask = DMA_BIT_MASK(32);
 164
 165         vc4 = devm_kzalloc(dev, sizeof(*vc4), GFP_KERNEL);
 166         if (!vc4)
 167                 return -ENOMEM;
 168
 169         drm = drm_dev_alloc(&vc4_drm_driver, dev);
 170         if (!drm)
 171                 return -ENOMEM;
 172         platform_set_drvdata(pdev, drm);
 173         vc4->dev = drm;
 174         drm->dev_private = vc4;
 175
 176         drm_dev_set_unique(drm, dev_name(dev));
 177
 178         vc4_bo_cache_init(drm);
 179
 180         drm_mode_config_init(drm);
 181         if (ret)
 182                 goto unref;
 183
 184         ret = component_bind_all(dev, drm);
 185         if (ret)
 186                 goto unref;
 187
 188         ret = drm_dev_register(drm, 0);
 189         if (ret < 0)
 190                 goto unbind_all;
 191
 192         /* Connector registration has to occur after DRM device
 193          * registration, because it creates sysfs entries based on the
 194          * DRM device.
 195          */
 196         list_for_each_entry(connector, &drm->mode_config.connector_list, head) {
 197                 ret = drm_connector_register(connector);
 198                 if (ret)
 199                         goto unregister;
 200         }
 201
 202         vc4_kms_load(drm);
 203
 204         return 0;
 205
 206 unregister:
 207         drm_dev_unregister(drm);
 208 unbind_all:
 209         component_unbind_all(dev, drm);
 210 unref:
 211         drm_dev_unref(drm);
 212         vc4_bo_cache_destroy(drm);
 213         return ret;
 214 }
 215
 216 static void vc4_drm_unbind(struct device *dev)
 217 {
 218         struct platform_device *pdev = to_platform_device(dev);
 219         struct drm_device *drm = platform_get_drvdata(pdev);
 220         struct vc4_dev *vc4 = to_vc4_dev(drm);
 221
 222         if (vc4->fbdev)
 223                 drm_fbdev_cma_fini(vc4->fbdev);
 224
 225         drm_mode_config_cleanup(drm);
 226
 227         drm_put_dev(drm);
 228 }
 229
 230 static const struct component_master_ops vc4_drm_ops = {
 231         .bind = vc4_drm_bind,
 232         .unbind = vc4_drm_unbind,
 233 };
 234
 235 static struct platform_driver *const component_drivers[] = {
 236         &vc4_hdmi_driver,
 237         &vc4_crtc_driver,
 238         &vc4_hvs_driver,
 239 };
 240
 241 static int vc4_platform_drm_probe(struct platform_device *pdev)
 242 {
 243         struct component_match *match = NULL;
 244         struct device *dev = &pdev->dev;
 245
 246         vc4_match_add_drivers(dev, &match,
 247                               component_drivers, ARRAY_SIZE(component_drivers));
 248
 249         return component_master_add_with_match(dev, &vc4_drm_ops, match);
 250 }
 251
 252 static int vc4_platform_drm_remove(struct platform_device *pdev)
 253 {
 254         component_master_del(&pdev->dev, &vc4_drm_ops);
 255
 256         return 0;
 257 }
 258
 259 static const struct of_device_id vc4_of_match[] = {
 260         { .compatible = "brcm,bcm2835-vc4", },
 261         {},
 262 };
 263 MODULE_DEVICE_TABLE(of, vc4_of_match);
 264
 265 static struct platform_driver vc4_platform_driver = {
 266         .probe          = vc4_platform_drm_probe,
 267         .remove         = vc4_platform_drm_remove,
 268         .driver         = {
 269                 .name   = "vc4-drm",
 270                 .owner  = THIS_MODULE,
 271                 .of_match_table = vc4_of_match,
 272         },
 273 };
 274
 275 static int __init vc4_drm_register(void)
 276 {
 277         int i, ret;
 278
 279         for (i = 0; i < ARRAY_SIZE(component_drivers); i++) {
 280                 ret = platform_driver_register(component_drivers[i]);
 281                 if (ret) {
 282                         while (--i >= 0)
 283                                 platform_driver_unregister(component_drivers[i]);
 284                         return ret;
 285                 }
 286         }
 287         return platform_driver_register(&vc4_platform_driver);
 288 }
 289
 290 static void __exit vc4_drm_unregister(void)
 291 {
 292         int i;
 293
 294         for (i = ARRAY_SIZE(component_drivers) - 1; i >= 0; i--)
 295                 platform_driver_unregister(component_drivers[i]);
 296
 297         platform_driver_unregister(&vc4_platform_driver);
 298 }
 299
 300 module_init(vc4_drm_register);
 301 module_exit(vc4_drm_unregister);
 302
 303 MODULE_ALIAS("platform:vc4-drm");
 304 MODULE_DESCRIPTION("Broadcom VC4 DRM Driver");
 305 MODULE_AUTHOR("Eric Anholt <eric@anholt.net>");
 306 MODULE_LICENSE("GPL v2");