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_lastclose(struct drm_device *dev)
  47 {
  48         struct vc4_dev *vc4 = to_vc4_dev(dev);
  49
  50         if (vc4->fbdev)
  51                 drm_fbdev_cma_restore_mode(vc4->fbdev);
  52 }
  53
  54 static const struct file_operations vc4_drm_fops = {
  55         .owner = THIS_MODULE,
  56         .open = drm_open,
  57         .release = drm_release,
  58         .unlocked_ioctl = drm_ioctl,
  59         .mmap = vc4_mmap,
  60         .poll = drm_poll,
  61         .read = drm_read,
  62 #ifdef CONFIG_COMPAT
  63         .compat_ioctl = drm_compat_ioctl,
  64 #endif
  65         .llseek = noop_llseek,
  66 };
  67
  68 static const struct drm_ioctl_desc vc4_drm_ioctls[] = {
  69         DRM_IOCTL_DEF_DRV(VC4_SUBMIT_CL, vc4_submit_cl_ioctl, 0),
  70         DRM_IOCTL_DEF_DRV(VC4_WAIT_SEQNO, vc4_wait_seqno_ioctl, 0),
  71         DRM_IOCTL_DEF_DRV(VC4_WAIT_BO, vc4_wait_bo_ioctl, 0),
  72         DRM_IOCTL_DEF_DRV(VC4_CREATE_BO, vc4_create_bo_ioctl, 0),
  73         DRM_IOCTL_DEF_DRV(VC4_MMAP_BO, vc4_mmap_bo_ioctl, 0),
  74         DRM_IOCTL_DEF_DRV(VC4_CREATE_SHADER_BO, vc4_create_shader_bo_ioctl, 0),
  75         DRM_IOCTL_DEF_DRV(VC4_GET_HANG_STATE, vc4_get_hang_state_ioctl,
  76                           DRM_ROOT_ONLY),
  77 };
  78
  79 static struct drm_driver vc4_drm_driver = {
  80         .driver_features = (DRIVER_MODESET |
  81                             DRIVER_ATOMIC |
  82                             DRIVER_GEM |
  83                             DRIVER_HAVE_IRQ |
  84                             DRIVER_RENDER |
  85                             DRIVER_PRIME),
  86         .lastclose = vc4_lastclose,
  87         .irq_handler = vc4_irq,
  88         .irq_preinstall = vc4_irq_preinstall,
  89         .irq_postinstall = vc4_irq_postinstall,
  90         .irq_uninstall = vc4_irq_uninstall,
  91
  92         .enable_vblank = vc4_enable_vblank,
  93         .disable_vblank = vc4_disable_vblank,
  94         .get_vblank_counter = drm_vblank_count,
  95
  96 #if defined(CONFIG_DEBUG_FS)
  97         .debugfs_init = vc4_debugfs_init,
  98         .debugfs_cleanup = vc4_debugfs_cleanup,
  99 #endif
 100
 101         .gem_create_object = vc4_create_object,
 102         .gem_free_object = vc4_free_object,
 103         .gem_vm_ops = &drm_gem_cma_vm_ops,
 104
 105         .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
 106         .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
 107         .gem_prime_import = drm_gem_prime_import,
 108         .gem_prime_export = vc4_prime_export,
 109         .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
 110         .gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
 111         .gem_prime_vmap = vc4_prime_vmap,
 112         .gem_prime_vunmap = drm_gem_cma_prime_vunmap,
 113         .gem_prime_mmap = vc4_prime_mmap,
 114
 115         .dumb_create = vc4_dumb_create,
 116         .dumb_map_offset = drm_gem_cma_dumb_map_offset,
 117         .dumb_destroy = drm_gem_dumb_destroy,
 118
 119         .ioctls = vc4_drm_ioctls,
 120         .num_ioctls = ARRAY_SIZE(vc4_drm_ioctls),
 121         .fops = &vc4_drm_fops,
 122
 123         .name = DRIVER_NAME,
 124         .desc = DRIVER_DESC,
 125         .date = DRIVER_DATE,
 126         .major = DRIVER_MAJOR,
 127         .minor = DRIVER_MINOR,
 128         .patchlevel = DRIVER_PATCHLEVEL,
 129 };
 130
 131 static int compare_dev(struct device *dev, void *data)
 132 {
 133         return dev == data;
 134 }
 135
 136 static void vc4_match_add_drivers(struct device *dev,
 137                                   struct component_match **match,
 138                                   struct platform_driver *const *drivers,
 139                                   int count)
 140 {
 141         int i;
 142
 143         for (i = 0; i < count; i++) {
 144                 struct device_driver *drv = &drivers[i]->driver;
 145                 struct device *p = NULL, *d;
 146
 147                 while ((d = bus_find_device(&platform_bus_type, p, drv,
 148                                             (void *)platform_bus_type.match))) {
 149                         put_device(p);
 150                         component_match_add(dev, match, compare_dev, d);
 151                         p = d;
 152                 }
 153                 put_device(p);
 154         }
 155 }
 156
 157 static void vc4_kick_out_firmware_fb(void)
 158 {
 159         struct apertures_struct *ap;
 160
 161         ap = alloc_apertures(1);
 162         if (!ap)
 163                 return;
 164
 165         /* Since VC4 is a UMA device, the simplefb node may have been
 166          * located anywhere in memory.
 167          */
 168         ap->ranges[0].base = 0;
 169         ap->ranges[0].size = ~0;
 170
 171         remove_conflicting_framebuffers(ap, "vc4drmfb", false);
 172         kfree(ap);
 173 }
 174
 175 static int vc4_drm_bind(struct device *dev)
 176 {
 177         struct platform_device *pdev = to_platform_device(dev);
 178         struct drm_device *drm;
 179         struct drm_connector *connector;
 180         struct vc4_dev *vc4;
 181         int ret = 0;
 182
 183         dev->coherent_dma_mask = DMA_BIT_MASK(32);
 184
 185         vc4 = devm_kzalloc(dev, sizeof(*vc4), GFP_KERNEL);
 186         if (!vc4)
 187                 return -ENOMEM;
 188
 189         drm = drm_dev_alloc(&vc4_drm_driver, dev);
 190         if (!drm)
 191                 return -ENOMEM;
 192         platform_set_drvdata(pdev, drm);
 193         vc4->dev = drm;
 194         drm->dev_private = vc4;
 195
 196         vc4_bo_cache_init(drm);
 197
 198         drm_mode_config_init(drm);
 199         if (ret)
 200                 goto unref;
 201
 202         vc4_gem_init(drm);
 203
 204         ret = component_bind_all(dev, drm);
 205         if (ret)
 206                 goto gem_destroy;
 207
 208         vc4_kick_out_firmware_fb();
 209
 210         ret = drm_dev_register(drm, 0);
 211         if (ret < 0)
 212                 goto unbind_all;
 213
 214         /* Connector registration has to occur after DRM device
 215          * registration, because it creates sysfs entries based on the
 216          * DRM device.
 217          */
 218         list_for_each_entry(connector, &drm->mode_config.connector_list, head) {
 219                 ret = drm_connector_register(connector);
 220                 if (ret)
 221                         goto unregister;
 222         }
 223
 224         vc4_kms_load(drm);
 225
 226         return 0;
 227
 228 unregister:
 229         drm_dev_unregister(drm);
 230 unbind_all:
 231         component_unbind_all(dev, drm);
 232 gem_destroy:
 233         vc4_gem_destroy(drm);
 234 unref:
 235         drm_dev_unref(drm);
 236         vc4_bo_cache_destroy(drm);
 237         return ret;
 238 }
 239
 240 static void vc4_drm_unbind(struct device *dev)
 241 {
 242         struct platform_device *pdev = to_platform_device(dev);
 243         struct drm_device *drm = platform_get_drvdata(pdev);
 244         struct vc4_dev *vc4 = to_vc4_dev(drm);
 245
 246         if (vc4->fbdev)
 247                 drm_fbdev_cma_fini(vc4->fbdev);
 248
 249         drm_mode_config_cleanup(drm);
 250
 251         drm_put_dev(drm);
 252 }
 253
 254 static const struct component_master_ops vc4_drm_ops = {
 255         .bind = vc4_drm_bind,
 256         .unbind = vc4_drm_unbind,
 257 };
 258
 259 static struct platform_driver *const component_drivers[] = {
 260         &vc4_hdmi_driver,
 261         &vc4_dpi_driver,
 262         &vc4_crtc_driver,
 263         &vc4_hvs_driver,
 264         &vc4_v3d_driver,
 265 };
 266
 267 static int vc4_platform_drm_probe(struct platform_device *pdev)
 268 {
 269         struct component_match *match = NULL;
 270         struct device *dev = &pdev->dev;
 271
 272         vc4_match_add_drivers(dev, &match,
 273                               component_drivers, ARRAY_SIZE(component_drivers));
 274
 275         return component_master_add_with_match(dev, &vc4_drm_ops, match);
 276 }
 277
 278 static int vc4_platform_drm_remove(struct platform_device *pdev)
 279 {
 280         component_master_del(&pdev->dev, &vc4_drm_ops);
 281
 282         return 0;
 283 }
 284
 285 static const struct of_device_id vc4_of_match[] = {
 286         { .compatible = "brcm,bcm2835-vc4", },
 287         {},
 288 };
 289 MODULE_DEVICE_TABLE(of, vc4_of_match);
 290
 291 static struct platform_driver vc4_platform_driver = {
 292         .probe          = vc4_platform_drm_probe,
 293         .remove         = vc4_platform_drm_remove,
 294         .driver         = {
 295                 .name   = "vc4-drm",
 296                 .of_match_table = vc4_of_match,
 297         },
 298 };
 299
 300 static int __init vc4_drm_register(void)
 301 {
 302         int i, ret;
 303
 304         for (i = 0; i < ARRAY_SIZE(component_drivers); i++) {
 305                 ret = platform_driver_register(component_drivers[i]);
 306                 if (ret) {
 307                         while (--i >= 0)
 308                                 platform_driver_unregister(component_drivers[i]);
 309                         return ret;
 310                 }
 311         }
 312         return platform_driver_register(&vc4_platform_driver);
 313 }
 314
 315 static void __exit vc4_drm_unregister(void)
 316 {
 317         int i;
 318
 319         for (i = ARRAY_SIZE(component_drivers) - 1; i >= 0; i--)
 320                 platform_driver_unregister(component_drivers[i]);
 321
 322         platform_driver_unregister(&vc4_platform_driver);
 323 }
 324
 325 module_init(vc4_drm_register);
 326 module_exit(vc4_drm_unregister);
 327
 328 MODULE_ALIAS("platform:vc4-drm");
 329 MODULE_DESCRIPTION("Broadcom VC4 DRM Driver");
 330 MODULE_AUTHOR("Eric Anholt <eric@anholt.net>");
 331 MODULE_LICENSE("GPL v2");