drivers/gpu/drm/armada/armada_drv.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright (C) 2012 Russell King
   4  */
   5 #include <linux/clk.h>
   6 #include <linux/component.h>
   7 #include <linux/module.h>
   8 #include <linux/of_graph.h>
   9 #include <drm/drm_atomic_helper.h>
  10 #include <drm/drm_probe_helper.h>
  11 #include <drm/drm_fb_helper.h>
  12 #include <drm/drm_of.h>
  13 #include "armada_crtc.h"
  14 #include "armada_drm.h"
  15 #include "armada_gem.h"
  16 #include "armada_fb.h"
  17 #include "armada_hw.h"
  18 #include <drm/armada_drm.h>
  19 #include "armada_ioctlP.h"
  20
  21 static struct drm_ioctl_desc armada_ioctls[] = {
  22         DRM_IOCTL_DEF_DRV(ARMADA_GEM_CREATE, armada_gem_create_ioctl,0),
  23         DRM_IOCTL_DEF_DRV(ARMADA_GEM_MMAP, armada_gem_mmap_ioctl, 0),
  24         DRM_IOCTL_DEF_DRV(ARMADA_GEM_PWRITE, armada_gem_pwrite_ioctl, 0),
  25 };
  26
  27 DEFINE_DRM_GEM_FOPS(armada_drm_fops);
  28
  29 static struct drm_driver armada_drm_driver = {
  30         .lastclose              = drm_fb_helper_lastclose,
  31         .gem_free_object_unlocked = armada_gem_free_object,
  32         .prime_handle_to_fd     = drm_gem_prime_handle_to_fd,
  33         .prime_fd_to_handle     = drm_gem_prime_fd_to_handle,
  34         .gem_prime_export       = armada_gem_prime_export,
  35         .gem_prime_import       = armada_gem_prime_import,
  36         .dumb_create            = armada_gem_dumb_create,
  37         .gem_vm_ops             = &armada_gem_vm_ops,
  38         .major                  = 1,
  39         .minor                  = 0,
  40         .name                   = "armada-drm",
  41         .desc                   = "Armada SoC DRM",
  42         .date                   = "20120730",
  43         .driver_features        = DRIVER_GEM | DRIVER_MODESET |
  44                                   DRIVER_PRIME | DRIVER_ATOMIC,
  45         .ioctls                 = armada_ioctls,
  46         .fops                   = &armada_drm_fops,
  47 };
  48
  49 static const struct drm_mode_config_funcs armada_drm_mode_config_funcs = {
  50         .fb_create              = armada_fb_create,
  51         .output_poll_changed    = drm_fb_helper_output_poll_changed,
  52         .atomic_check           = drm_atomic_helper_check,
  53         .atomic_commit          = drm_atomic_helper_commit,
  54 };
  55
  56 static int armada_drm_bind(struct device *dev)
  57 {
  58         struct armada_private *priv;
  59         struct resource *mem = NULL;
  60         int ret, n;
  61
  62         for (n = 0; ; n++) {
  63                 struct resource *r = platform_get_resource(to_platform_device(dev),
  64                                                            IORESOURCE_MEM, n);
  65                 if (!r)
  66                         break;
  67
  68                 /* Resources above 64K are graphics memory */
  69                 if (resource_size(r) > SZ_64K)
  70                         mem = r;
  71                 else
  72                         return -EINVAL;
  73         }
  74
  75         if (!mem)
  76                 return -ENXIO;
  77
  78         if (!devm_request_mem_region(dev, mem->start, resource_size(mem),
  79                                      "armada-drm"))
  80                 return -EBUSY;
  81
  82         priv = kzalloc(sizeof(*priv), GFP_KERNEL);
  83         if (!priv)
  84                 return -ENOMEM;
  85
  86         /*
  87          * The drm_device structure must be at the start of
  88          * armada_private for drm_dev_put() to work correctly.
  89          */
  90         BUILD_BUG_ON(offsetof(struct armada_private, drm) != 0);
  91
  92         ret = drm_dev_init(&priv->drm, &armada_drm_driver, dev);
  93         if (ret) {
  94                 dev_err(dev, "[" DRM_NAME ":%s] drm_dev_init failed: %d\n",
  95                         __func__, ret);
  96                 kfree(priv);
  97                 return ret;
  98         }
  99
 100         /* Remove early framebuffers */
 101         ret = drm_fb_helper_remove_conflicting_framebuffers(NULL,
 102                                                             "armada-drm-fb",
 103                                                             false);
 104         if (ret) {
 105                 dev_err(dev, "[" DRM_NAME ":%s] can't kick out simple-fb: %d\n",
 106                         __func__, ret);
 107                 kfree(priv);
 108                 return ret;
 109         }
 110
 111         priv->drm.dev_private = priv;
 112
 113         dev_set_drvdata(dev, &priv->drm);
 114
 115         /* Mode setting support */
 116         drm_mode_config_init(&priv->drm);
 117         priv->drm.mode_config.min_width = 320;
 118         priv->drm.mode_config.min_height = 200;
 119
 120         /*
 121          * With vscale enabled, the maximum width is 1920 due to the
 122          * 1920 by 3 lines RAM
 123          */
 124         priv->drm.mode_config.max_width = 1920;
 125         priv->drm.mode_config.max_height = 2048;
 126
 127         priv->drm.mode_config.preferred_depth = 24;
 128         priv->drm.mode_config.funcs = &armada_drm_mode_config_funcs;
 129         drm_mm_init(&priv->linear, mem->start, resource_size(mem));
 130         mutex_init(&priv->linear_lock);
 131
 132         ret = component_bind_all(dev, &priv->drm);
 133         if (ret)
 134                 goto err_kms;
 135
 136         ret = drm_vblank_init(&priv->drm, priv->drm.mode_config.num_crtc);
 137         if (ret)
 138                 goto err_comp;
 139
 140         priv->drm.irq_enabled = true;
 141
 142         drm_mode_config_reset(&priv->drm);
 143
 144         ret = armada_fbdev_init(&priv->drm);
 145         if (ret)
 146                 goto err_comp;
 147
 148         drm_kms_helper_poll_init(&priv->drm);
 149
 150         ret = drm_dev_register(&priv->drm, 0);
 151         if (ret)
 152                 goto err_poll;
 153
 154 #ifdef CONFIG_DEBUG_FS
 155         armada_drm_debugfs_init(priv->drm.primary);
 156 #endif
 157
 158         return 0;
 159
 160  err_poll:
 161         drm_kms_helper_poll_fini(&priv->drm);
 162         armada_fbdev_fini(&priv->drm);
 163  err_comp:
 164         component_unbind_all(dev, &priv->drm);
 165  err_kms:
 166         drm_mode_config_cleanup(&priv->drm);
 167         drm_mm_takedown(&priv->linear);
 168         drm_dev_put(&priv->drm);
 169         return ret;
 170 }
 171
 172 static void armada_drm_unbind(struct device *dev)
 173 {
 174         struct drm_device *drm = dev_get_drvdata(dev);
 175         struct armada_private *priv = drm->dev_private;
 176
 177         drm_kms_helper_poll_fini(&priv->drm);
 178         armada_fbdev_fini(&priv->drm);
 179
 180         drm_dev_unregister(&priv->drm);
 181
 182         drm_atomic_helper_shutdown(&priv->drm);
 183
 184         component_unbind_all(dev, &priv->drm);
 185
 186         drm_mode_config_cleanup(&priv->drm);
 187         drm_mm_takedown(&priv->linear);
 188
 189         drm_dev_put(&priv->drm);
 190 }
 191
 192 static int compare_of(struct device *dev, void *data)
 193 {
 194         return dev->of_node == data;
 195 }
 196
 197 static int compare_dev_name(struct device *dev, void *data)
 198 {
 199         const char *name = data;
 200         return !strcmp(dev_name(dev), name);
 201 }
 202
 203 static void armada_add_endpoints(struct device *dev,
 204         struct component_match **match, struct device_node *dev_node)
 205 {
 206         struct device_node *ep, *remote;
 207
 208         for_each_endpoint_of_node(dev_node, ep) {
 209                 remote = of_graph_get_remote_port_parent(ep);
 210                 if (remote && of_device_is_available(remote))
 211                         drm_of_component_match_add(dev, match, compare_of,
 212                                                    remote);
 213                 of_node_put(remote);
 214         }
 215 }
 216
 217 static const struct component_master_ops armada_master_ops = {
 218         .bind = armada_drm_bind,
 219         .unbind = armada_drm_unbind,
 220 };
 221
 222 static int armada_drm_probe(struct platform_device *pdev)
 223 {
 224         struct component_match *match = NULL;
 225         struct device *dev = &pdev->dev;
 226         int ret;
 227
 228         ret = drm_of_component_probe(dev, compare_dev_name, &armada_master_ops);
 229         if (ret != -EINVAL)
 230                 return ret;
 231
 232         if (dev->platform_data) {
 233                 char **devices = dev->platform_data;
 234                 struct device *d;
 235                 int i;
 236
 237                 for (i = 0; devices[i]; i++)
 238                         component_match_add(dev, &match, compare_dev_name,
 239                                             devices[i]);
 240
 241                 if (i == 0) {
 242                         dev_err(dev, "missing 'ports' property\n");
 243                         return -ENODEV;
 244                 }
 245
 246                 for (i = 0; devices[i]; i++) {
 247                         d = bus_find_device_by_name(&platform_bus_type, NULL,
 248                                                     devices[i]);
 249                         if (d && d->of_node)
 250                                 armada_add_endpoints(dev, &match, d->of_node);
 251                         put_device(d);
 252                 }
 253         }
 254
 255         return component_master_add_with_match(&pdev->dev, &armada_master_ops,
 256                                                match);
 257 }
 258
 259 static int armada_drm_remove(struct platform_device *pdev)
 260 {
 261         component_master_del(&pdev->dev, &armada_master_ops);
 262         return 0;
 263 }
 264
 265 static const struct platform_device_id armada_drm_platform_ids[] = {
 266         {
 267                 .name           = "armada-drm",
 268         }, {
 269                 .name           = "armada-510-drm",
 270         },
 271         { },
 272 };
 273 MODULE_DEVICE_TABLE(platform, armada_drm_platform_ids);
 274
 275 static struct platform_driver armada_drm_platform_driver = {
 276         .probe  = armada_drm_probe,
 277         .remove = armada_drm_remove,
 278         .driver = {
 279                 .name   = "armada-drm",
 280         },
 281         .id_table = armada_drm_platform_ids,
 282 };
 283
 284 static int __init armada_drm_init(void)
 285 {
 286         int ret;
 287
 288         armada_drm_driver.num_ioctls = ARRAY_SIZE(armada_ioctls);
 289
 290         ret = platform_driver_register(&armada_lcd_platform_driver);
 291         if (ret)
 292                 return ret;
 293         ret = platform_driver_register(&armada_drm_platform_driver);
 294         if (ret)
 295                 platform_driver_unregister(&armada_lcd_platform_driver);
 296         return ret;
 297 }
 298 module_init(armada_drm_init);
 299
 300 static void __exit armada_drm_exit(void)
 301 {
 302         platform_driver_unregister(&armada_drm_platform_driver);
 303         platform_driver_unregister(&armada_lcd_platform_driver);
 304 }
 305 module_exit(armada_drm_exit);
 306
 307 MODULE_AUTHOR("Russell King <rmk+kernel@arm.linux.org.uk>");
 308 MODULE_DESCRIPTION("Armada DRM Driver");
 309 MODULE_LICENSE("GPL");
 310 MODULE_ALIAS("platform:armada-drm");