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_SUBMIT_CL, vc4_submit_cl_ioctl, 0),
  78         DRM_IOCTL_DEF_DRV(VC4_WAIT_SEQNO, vc4_wait_seqno_ioctl, 0),
  79         DRM_IOCTL_DEF_DRV(VC4_WAIT_BO, vc4_wait_bo_ioctl, 0),
  80         DRM_IOCTL_DEF_DRV(VC4_CREATE_BO, vc4_create_bo_ioctl, 0),
  81         DRM_IOCTL_DEF_DRV(VC4_MMAP_BO, vc4_mmap_bo_ioctl, 0),
  82         DRM_IOCTL_DEF_DRV(VC4_CREATE_SHADER_BO, vc4_create_shader_bo_ioctl, 0),
  83         DRM_IOCTL_DEF_DRV(VC4_GET_HANG_STATE, vc4_get_hang_state_ioctl,
  84                           DRM_ROOT_ONLY),
  85 };
  86
  87 static struct drm_driver vc4_drm_driver = {
  88         .driver_features = (DRIVER_MODESET |
  89                             DRIVER_ATOMIC |
  90                             DRIVER_GEM |
  91                             DRIVER_HAVE_IRQ |
  92                             DRIVER_PRIME),
  93         .lastclose = vc4_lastclose,
  94         .preclose = vc4_drm_preclose,
  95
  96         .irq_handler = vc4_irq,
  97         .irq_preinstall = vc4_irq_preinstall,
  98         .irq_postinstall = vc4_irq_postinstall,
  99         .irq_uninstall = vc4_irq_uninstall,
 100
 101         .enable_vblank = vc4_enable_vblank,
 102         .disable_vblank = vc4_disable_vblank,
 103         .get_vblank_counter = drm_vblank_count,
 104
 105 #if defined(CONFIG_DEBUG_FS)
 106         .debugfs_init = vc4_debugfs_init,
 107         .debugfs_cleanup = vc4_debugfs_cleanup,
 108 #endif
 109
 110         .gem_create_object = vc4_create_object,
 111         .gem_free_object = vc4_free_object,
 112         .gem_vm_ops = &drm_gem_cma_vm_ops,
 113
 114         .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
 115         .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
 116         .gem_prime_import = drm_gem_prime_import,
 117         .gem_prime_export = vc4_prime_export,
 118         .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
 119         .gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
 120         .gem_prime_vmap = vc4_prime_vmap,
 121         .gem_prime_vunmap = drm_gem_cma_prime_vunmap,
 122         .gem_prime_mmap = vc4_prime_mmap,
 123
 124         .dumb_create = vc4_dumb_create,
 125         .dumb_map_offset = drm_gem_cma_dumb_map_offset,
 126         .dumb_destroy = drm_gem_dumb_destroy,
 127
 128         .ioctls = vc4_drm_ioctls,
 129         .num_ioctls = ARRAY_SIZE(vc4_drm_ioctls),
 130         .fops = &vc4_drm_fops,
 131
 132         .name = DRIVER_NAME,
 133         .desc = DRIVER_DESC,
 134         .date = DRIVER_DATE,
 135         .major = DRIVER_MAJOR,
 136         .minor = DRIVER_MINOR,
 137         .patchlevel = DRIVER_PATCHLEVEL,
 138 };
 139
 140 static int compare_dev(struct device *dev, void *data)
 141 {
 142         return dev == data;
 143 }
 144
 145 static void vc4_match_add_drivers(struct device *dev,
 146                                   struct component_match **match,
 147                                   struct platform_driver *const *drivers,
 148                                   int count)
 149 {
 150         int i;
 151
 152         for (i = 0; i < count; i++) {
 153                 struct device_driver *drv = &drivers[i]->driver;
 154                 struct device *p = NULL, *d;
 155
 156                 while ((d = bus_find_device(&platform_bus_type, p, drv,
 157                                             (void *)platform_bus_type.match))) {
 158                         put_device(p);
 159                         component_match_add(dev, match, compare_dev, d);
 160                         p = d;
 161                 }
 162                 put_device(p);
 163         }
 164 }
 165
 166 static int vc4_drm_bind(struct device *dev)
 167 {
 168         struct platform_device *pdev = to_platform_device(dev);
 169         struct drm_device *drm;
 170         struct drm_connector *connector;
 171         struct vc4_dev *vc4;
 172         int ret = 0;
 173
 174         dev->coherent_dma_mask = DMA_BIT_MASK(32);
 175
 176         vc4 = devm_kzalloc(dev, sizeof(*vc4), GFP_KERNEL);
 177         if (!vc4)
 178                 return -ENOMEM;
 179
 180         drm = drm_dev_alloc(&vc4_drm_driver, dev);
 181         if (!drm)
 182                 return -ENOMEM;
 183         platform_set_drvdata(pdev, drm);
 184         vc4->dev = drm;
 185         drm->dev_private = vc4;
 186
 187         vc4_bo_cache_init(drm);
 188
 189         drm_mode_config_init(drm);
 190         if (ret)
 191                 goto unref;
 192
 193         vc4_gem_init(drm);
 194
 195         ret = component_bind_all(dev, drm);
 196         if (ret)
 197                 goto gem_destroy;
 198
 199         ret = drm_dev_register(drm, 0);
 200         if (ret < 0)
 201                 goto unbind_all;
 202
 203         /* Connector registration has to occur after DRM device
 204          * registration, because it creates sysfs entries based on the
 205          * DRM device.
 206          */
 207         list_for_each_entry(connector, &drm->mode_config.connector_list, head) {
 208                 ret = drm_connector_register(connector);
 209                 if (ret)
 210                         goto unregister;
 211         }
 212
 213         vc4_kms_load(drm);
 214
 215         return 0;
 216
 217 unregister:
 218         drm_dev_unregister(drm);
 219 unbind_all:
 220         component_unbind_all(dev, drm);
 221 gem_destroy:
 222         vc4_gem_destroy(drm);
 223 unref:
 224         drm_dev_unref(drm);
 225         vc4_bo_cache_destroy(drm);
 226         return ret;
 227 }
 228
 229 static void vc4_drm_unbind(struct device *dev)
 230 {
 231         struct platform_device *pdev = to_platform_device(dev);
 232         struct drm_device *drm = platform_get_drvdata(pdev);
 233         struct vc4_dev *vc4 = to_vc4_dev(drm);
 234
 235         if (vc4->fbdev)
 236                 drm_fbdev_cma_fini(vc4->fbdev);
 237
 238         drm_mode_config_cleanup(drm);
 239
 240         drm_put_dev(drm);
 241 }
 242
 243 static const struct component_master_ops vc4_drm_ops = {
 244         .bind = vc4_drm_bind,
 245         .unbind = vc4_drm_unbind,
 246 };
 247
 248 static struct platform_driver *const component_drivers[] = {
 249         &vc4_hdmi_driver,
 250         &vc4_crtc_driver,
 251         &vc4_hvs_driver,
 252         &vc4_v3d_driver,
 253 };
 254
 255 static int vc4_platform_drm_probe(struct platform_device *pdev)
 256 {
 257         struct component_match *match = NULL;
 258         struct device *dev = &pdev->dev;
 259
 260         vc4_match_add_drivers(dev, &match,
 261                               component_drivers, ARRAY_SIZE(component_drivers));
 262
 263         return component_master_add_with_match(dev, &vc4_drm_ops, match);
 264 }
 265
 266 static int vc4_platform_drm_remove(struct platform_device *pdev)
 267 {
 268         component_master_del(&pdev->dev, &vc4_drm_ops);
 269
 270         return 0;
 271 }
 272
 273 static const struct of_device_id vc4_of_match[] = {
 274         { .compatible = "brcm,bcm2835-vc4", },
 275         {},
 276 };
 277 MODULE_DEVICE_TABLE(of, vc4_of_match);
 278
 279 static struct platform_driver vc4_platform_driver = {
 280         .probe          = vc4_platform_drm_probe,
 281         .remove         = vc4_platform_drm_remove,
 282         .driver         = {
 283                 .name   = "vc4-drm",
 284                 .of_match_table = vc4_of_match,
 285         },
 286 };
 287
 288 static int __init vc4_drm_register(void)
 289 {
 290         int i, ret;
 291
 292         for (i = 0; i < ARRAY_SIZE(component_drivers); i++) {
 293                 ret = platform_driver_register(component_drivers[i]);
 294                 if (ret) {
 295                         while (--i >= 0)
 296                                 platform_driver_unregister(component_drivers[i]);
 297                         return ret;
 298                 }
 299         }
 300         return platform_driver_register(&vc4_platform_driver);
 301 }
 302
 303 static void __exit vc4_drm_unregister(void)
 304 {
 305         int i;
 306
 307         for (i = ARRAY_SIZE(component_drivers) - 1; i >= 0; i--)
 308                 platform_driver_unregister(component_drivers[i]);
 309
 310         platform_driver_unregister(&vc4_platform_driver);
 311 }
 312
 313 module_init(vc4_drm_register);
 314 module_exit(vc4_drm_unregister);
 315
 316 MODULE_ALIAS("platform:vc4-drm");
 317 MODULE_DESCRIPTION("Broadcom VC4 DRM Driver");
 318 MODULE_AUTHOR("Eric Anholt <eric@anholt.net>");
 319 MODULE_LICENSE("GPL v2");