drivers/gpu/drm/armada/armada_drv.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright (C) 2012 Russell King
   4  */
   5
   6 #include <linux/clk.h>
   7 #include <linux/component.h>
   8 #include <linux/module.h>
   9 #include <linux/of_graph.h>
  10 #include <linux/platform_device.h>
  11
  12 #include <drm/drm_atomic_helper.h>
  13 #include <drm/drm_drv.h>
  14 #include <drm/drm_ioctl.h>
  15 #include <drm/drm_managed.h>
  16 #include <drm/drm_prime.h>
  17 #include <drm/drm_probe_helper.h>
  18 #include <drm/drm_fb_helper.h>
  19 #include <drm/drm_of.h>
  20 #include <drm/drm_vblank.h>
  21
  22 #include "armada_crtc.h"
  23 #include "armada_drm.h"
  24 #include "armada_gem.h"
  25 #include "armada_fb.h"
  26 #include "armada_hw.h"
  27 #include <drm/armada_drm.h>
  28 #include "armada_ioctlP.h"
  29
  30 static struct drm_ioctl_desc armada_ioctls[] = {
  31         DRM_IOCTL_DEF_DRV(ARMADA_GEM_CREATE, armada_gem_create_ioctl,0),
  32         DRM_IOCTL_DEF_DRV(ARMADA_GEM_MMAP, armada_gem_mmap_ioctl, 0),
  33         DRM_IOCTL_DEF_DRV(ARMADA_GEM_PWRITE, armada_gem_pwrite_ioctl, 0),
  34 };
  35
  36 DEFINE_DRM_GEM_FOPS(armada_drm_fops);
  37
  38 static struct drm_driver armada_drm_driver = {
  39         .lastclose              = drm_fb_helper_lastclose,
  40         .gem_free_object_unlocked = armada_gem_free_object,
  41         .prime_handle_to_fd     = drm_gem_prime_handle_to_fd,
  42         .prime_fd_to_handle     = drm_gem_prime_fd_to_handle,
  43         .gem_prime_export       = armada_gem_prime_export,
  44         .gem_prime_import       = armada_gem_prime_import,
  45         .dumb_create            = armada_gem_dumb_create,
  46         .gem_vm_ops             = &armada_gem_vm_ops,
  47         .major                  = 1,
  48         .minor                  = 0,
  49         .name                   = "armada-drm",
  50         .desc                   = "Armada SoC DRM",
  51         .date                   = "20120730",
  52         .driver_features        = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
  53         .ioctls                 = armada_ioctls,
  54         .fops                   = &armada_drm_fops,
  55 };
  56
  57 static const struct drm_mode_config_funcs armada_drm_mode_config_funcs = {
  58         .fb_create              = armada_fb_create,
  59         .output_poll_changed    = drm_fb_helper_output_poll_changed,
  60         .atomic_check           = drm_atomic_helper_check,
  61         .atomic_commit          = drm_atomic_helper_commit,
  62 };
  63
  64 static int armada_drm_bind(struct device *dev)
  65 {
  66         struct armada_private *priv;
  67         struct resource *mem = NULL;
  68         int ret, n;
  69
  70         for (n = 0; ; n++) {
  71                 struct resource *r = platform_get_resource(to_platform_device(dev),
  72                                                            IORESOURCE_MEM, n);
  73                 if (!r)
  74                         break;
  75
  76                 /* Resources above 64K are graphics memory */
  77                 if (resource_size(r) > SZ_64K)
  78                         mem = r;
  79                 else
  80                         return -EINVAL;
  81         }
  82
  83         if (!mem)
  84                 return -ENXIO;
  85
  86         if (!devm_request_mem_region(dev, mem->start, resource_size(mem),
  87                                      "armada-drm"))
  88                 return -EBUSY;
  89
  90         priv = kzalloc(sizeof(*priv), GFP_KERNEL);
  91         if (!priv)
  92                 return -ENOMEM;
  93
  94         /*
  95          * The drm_device structure must be at the start of
  96          * armada_private for drm_dev_put() to work correctly.
  97          */
  98         BUILD_BUG_ON(offsetof(struct armada_private, drm) != 0);
  99
 100         ret = drm_dev_init(&priv->drm, &armada_drm_driver, dev);
 101         if (ret) {
 102                 dev_err(dev, "[" DRM_NAME ":%s] drm_dev_init failed: %d\n",
 103                         __func__, ret);
 104                 kfree(priv);
 105                 return ret;
 106         }
 107         drmm_add_final_kfree(&priv->drm, priv);
 108
 109         /* Remove early framebuffers */
 110         ret = drm_fb_helper_remove_conflicting_framebuffers(NULL,
 111                                                             "armada-drm-fb",
 112                                                             false);
 113         if (ret) {
 114                 dev_err(dev, "[" DRM_NAME ":%s] can't kick out simple-fb: %d\n",
 115                         __func__, ret);
 116                 kfree(priv);
 117                 return ret;
 118         }
 119
 120         priv->drm.dev_private = priv;
 121
 122         dev_set_drvdata(dev, &priv->drm);
 123
 124         /* Mode setting support */
 125         drm_mode_config_init(&priv->drm);
 126         priv->drm.mode_config.min_width = 320;
 127         priv->drm.mode_config.min_height = 200;
 128
 129         /*
 130          * With vscale enabled, the maximum width is 1920 due to the
 131          * 1920 by 3 lines RAM
 132          */
 133         priv->drm.mode_config.max_width = 1920;
 134         priv->drm.mode_config.max_height = 2048;
 135
 136         priv->drm.mode_config.preferred_depth = 24;
 137         priv->drm.mode_config.funcs = &armada_drm_mode_config_funcs;
 138         drm_mm_init(&priv->linear, mem->start, resource_size(mem));
 139         mutex_init(&priv->linear_lock);
 140
 141         ret = component_bind_all(dev, &priv->drm);
 142         if (ret)
 143                 goto err_kms;
 144
 145         ret = drm_vblank_init(&priv->drm, priv->drm.mode_config.num_crtc);
 146         if (ret)
 147                 goto err_comp;
 148
 149         priv->drm.irq_enabled = true;
 150
 151         drm_mode_config_reset(&priv->drm);
 152
 153         ret = armada_fbdev_init(&priv->drm);
 154         if (ret)
 155                 goto err_comp;
 156
 157         drm_kms_helper_poll_init(&priv->drm);
 158
 159         ret = drm_dev_register(&priv->drm, 0);
 160         if (ret)
 161                 goto err_poll;
 162
 163 #ifdef CONFIG_DEBUG_FS
 164         armada_drm_debugfs_init(priv->drm.primary);
 165 #endif
 166
 167         return 0;
 168
 169  err_poll:
 170         drm_kms_helper_poll_fini(&priv->drm);
 171         armada_fbdev_fini(&priv->drm);
 172  err_comp:
 173         component_unbind_all(dev, &priv->drm);
 174  err_kms:
 175         drm_mode_config_cleanup(&priv->drm);
 176         drm_mm_takedown(&priv->linear);
 177         drm_dev_put(&priv->drm);
 178         return ret;
 179 }
 180
 181 static void armada_drm_unbind(struct device *dev)
 182 {
 183         struct drm_device *drm = dev_get_drvdata(dev);
 184         struct armada_private *priv = drm->dev_private;
 185
 186         drm_kms_helper_poll_fini(&priv->drm);
 187         armada_fbdev_fini(&priv->drm);
 188
 189         drm_dev_unregister(&priv->drm);
 190
 191         drm_atomic_helper_shutdown(&priv->drm);
 192
 193         component_unbind_all(dev, &priv->drm);
 194
 195         drm_mode_config_cleanup(&priv->drm);
 196         drm_mm_takedown(&priv->linear);
 197
 198         drm_dev_put(&priv->drm);
 199 }
 200
 201 static int compare_of(struct device *dev, void *data)
 202 {
 203         return dev->of_node == data;
 204 }
 205
 206 static int compare_dev_name(struct device *dev, void *data)
 207 {
 208         const char *name = data;
 209         return !strcmp(dev_name(dev), name);
 210 }
 211
 212 static void armada_add_endpoints(struct device *dev,
 213         struct component_match **match, struct device_node *dev_node)
 214 {
 215         struct device_node *ep, *remote;
 216
 217         for_each_endpoint_of_node(dev_node, ep) {
 218                 remote = of_graph_get_remote_port_parent(ep);
 219                 if (remote && of_device_is_available(remote))
 220                         drm_of_component_match_add(dev, match, compare_of,
 221                                                    remote);
 222                 of_node_put(remote);
 223         }
 224 }
 225
 226 static const struct component_master_ops armada_master_ops = {
 227         .bind = armada_drm_bind,
 228         .unbind = armada_drm_unbind,
 229 };
 230
 231 static int armada_drm_probe(struct platform_device *pdev)
 232 {
 233         struct component_match *match = NULL;
 234         struct device *dev = &pdev->dev;
 235         int ret;
 236
 237         ret = drm_of_component_probe(dev, compare_dev_name, &armada_master_ops);
 238         if (ret != -EINVAL)
 239                 return ret;
 240
 241         if (dev->platform_data) {
 242                 char **devices = dev->platform_data;
 243                 struct device *d;
 244                 int i;
 245
 246                 for (i = 0; devices[i]; i++)
 247                         component_match_add(dev, &match, compare_dev_name,
 248                                             devices[i]);
 249
 250                 if (i == 0) {
 251                         dev_err(dev, "missing 'ports' property\n");
 252                         return -ENODEV;
 253                 }
 254
 255                 for (i = 0; devices[i]; i++) {
 256                         d = bus_find_device_by_name(&platform_bus_type, NULL,
 257                                                     devices[i]);
 258                         if (d && d->of_node)
 259                                 armada_add_endpoints(dev, &match, d->of_node);
 260                         put_device(d);
 261                 }
 262         }
 263
 264         return component_master_add_with_match(&pdev->dev, &armada_master_ops,
 265                                                match);
 266 }
 267
 268 static int armada_drm_remove(struct platform_device *pdev)
 269 {
 270         component_master_del(&pdev->dev, &armada_master_ops);
 271         return 0;
 272 }
 273
 274 static const struct platform_device_id armada_drm_platform_ids[] = {
 275         {
 276                 .name           = "armada-drm",
 277         }, {
 278                 .name           = "armada-510-drm",
 279         },
 280         { },
 281 };
 282 MODULE_DEVICE_TABLE(platform, armada_drm_platform_ids);
 283
 284 static struct platform_driver armada_drm_platform_driver = {
 285         .probe  = armada_drm_probe,
 286         .remove = armada_drm_remove,
 287         .driver = {
 288                 .name   = "armada-drm",
 289         },
 290         .id_table = armada_drm_platform_ids,
 291 };
 292
 293 static int __init armada_drm_init(void)
 294 {
 295         int ret;
 296
 297         armada_drm_driver.num_ioctls = ARRAY_SIZE(armada_ioctls);
 298
 299         ret = platform_driver_register(&armada_lcd_platform_driver);
 300         if (ret)
 301                 return ret;
 302         ret = platform_driver_register(&armada_drm_platform_driver);
 303         if (ret)
 304                 platform_driver_unregister(&armada_lcd_platform_driver);
 305         return ret;
 306 }
 307 module_init(armada_drm_init);
 308
 309 static void __exit armada_drm_exit(void)
 310 {
 311         platform_driver_unregister(&armada_drm_platform_driver);
 312         platform_driver_unregister(&armada_lcd_platform_driver);
 313 }
 314 module_exit(armada_drm_exit);
 315
 316 MODULE_AUTHOR("Russell King <rmk+kernel@armlinux.org.uk>");
 317 MODULE_DESCRIPTION("Armada DRM Driver");
 318 MODULE_LICENSE("GPL");
 319 MODULE_ALIAS("platform:armada-drm");