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 = devm_drm_dev_alloc(dev, &armada_drm_driver,
  91                                   struct armada_private, drm);
  92         if (IS_ERR(priv)) {
  93                 dev_err(dev, "[" DRM_NAME ":%s] devm_drm_dev_alloc failed: %li\n",
  94                         __func__, PTR_ERR(priv));
  95                 return PTR_ERR(priv);
  96         }
  97
  98         /* Remove early framebuffers */
  99         ret = drm_fb_helper_remove_conflicting_framebuffers(NULL,
 100                                                             "armada-drm-fb",
 101                                                             false);
 102         if (ret) {
 103                 dev_err(dev, "[" DRM_NAME ":%s] can't kick out simple-fb: %d\n",
 104                         __func__, ret);
 105                 return ret;
 106         }
 107
 108         dev_set_drvdata(dev, &priv->drm);
 109
 110         /* Mode setting support */
 111         drm_mode_config_init(&priv->drm);
 112         priv->drm.mode_config.min_width = 320;
 113         priv->drm.mode_config.min_height = 200;
 114
 115         /*
 116          * With vscale enabled, the maximum width is 1920 due to the
 117          * 1920 by 3 lines RAM
 118          */
 119         priv->drm.mode_config.max_width = 1920;
 120         priv->drm.mode_config.max_height = 2048;
 121
 122         priv->drm.mode_config.preferred_depth = 24;
 123         priv->drm.mode_config.funcs = &armada_drm_mode_config_funcs;
 124         drm_mm_init(&priv->linear, mem->start, resource_size(mem));
 125         mutex_init(&priv->linear_lock);
 126
 127         ret = component_bind_all(dev, &priv->drm);
 128         if (ret)
 129                 goto err_kms;
 130
 131         ret = drm_vblank_init(&priv->drm, priv->drm.mode_config.num_crtc);
 132         if (ret)
 133                 goto err_comp;
 134
 135         priv->drm.irq_enabled = true;
 136
 137         drm_mode_config_reset(&priv->drm);
 138
 139         ret = armada_fbdev_init(&priv->drm);
 140         if (ret)
 141                 goto err_comp;
 142
 143         drm_kms_helper_poll_init(&priv->drm);
 144
 145         ret = drm_dev_register(&priv->drm, 0);
 146         if (ret)
 147                 goto err_poll;
 148
 149 #ifdef CONFIG_DEBUG_FS
 150         armada_drm_debugfs_init(priv->drm.primary);
 151 #endif
 152
 153         return 0;
 154
 155  err_poll:
 156         drm_kms_helper_poll_fini(&priv->drm);
 157         armada_fbdev_fini(&priv->drm);
 158  err_comp:
 159         component_unbind_all(dev, &priv->drm);
 160  err_kms:
 161         drm_mode_config_cleanup(&priv->drm);
 162         drm_mm_takedown(&priv->linear);
 163         return ret;
 164 }
 165
 166 static void armada_drm_unbind(struct device *dev)
 167 {
 168         struct drm_device *drm = dev_get_drvdata(dev);
 169         struct armada_private *priv = drm_to_armada_dev(drm);
 170
 171         drm_kms_helper_poll_fini(&priv->drm);
 172         armada_fbdev_fini(&priv->drm);
 173
 174         drm_dev_unregister(&priv->drm);
 175
 176         drm_atomic_helper_shutdown(&priv->drm);
 177
 178         component_unbind_all(dev, &priv->drm);
 179
 180         drm_mode_config_cleanup(&priv->drm);
 181         drm_mm_takedown(&priv->linear);
 182 }
 183
 184 static int compare_of(struct device *dev, void *data)
 185 {
 186         return dev->of_node == data;
 187 }
 188
 189 static int compare_dev_name(struct device *dev, void *data)
 190 {
 191         const char *name = data;
 192         return !strcmp(dev_name(dev), name);
 193 }
 194
 195 static void armada_add_endpoints(struct device *dev,
 196         struct component_match **match, struct device_node *dev_node)
 197 {
 198         struct device_node *ep, *remote;
 199
 200         for_each_endpoint_of_node(dev_node, ep) {
 201                 remote = of_graph_get_remote_port_parent(ep);
 202                 if (remote && of_device_is_available(remote))
 203                         drm_of_component_match_add(dev, match, compare_of,
 204                                                    remote);
 205                 of_node_put(remote);
 206         }
 207 }
 208
 209 static const struct component_master_ops armada_master_ops = {
 210         .bind = armada_drm_bind,
 211         .unbind = armada_drm_unbind,
 212 };
 213
 214 static int armada_drm_probe(struct platform_device *pdev)
 215 {
 216         struct component_match *match = NULL;
 217         struct device *dev = &pdev->dev;
 218         int ret;
 219
 220         ret = drm_of_component_probe(dev, compare_dev_name, &armada_master_ops);
 221         if (ret != -EINVAL)
 222                 return ret;
 223
 224         if (dev->platform_data) {
 225                 char **devices = dev->platform_data;
 226                 struct device *d;
 227                 int i;
 228
 229                 for (i = 0; devices[i]; i++)
 230                         component_match_add(dev, &match, compare_dev_name,
 231                                             devices[i]);
 232
 233                 if (i == 0) {
 234                         dev_err(dev, "missing 'ports' property\n");
 235                         return -ENODEV;
 236                 }
 237
 238                 for (i = 0; devices[i]; i++) {
 239                         d = bus_find_device_by_name(&platform_bus_type, NULL,
 240                                                     devices[i]);
 241                         if (d && d->of_node)
 242                                 armada_add_endpoints(dev, &match, d->of_node);
 243                         put_device(d);
 244                 }
 245         }
 246
 247         return component_master_add_with_match(&pdev->dev, &armada_master_ops,
 248                                                match);
 249 }
 250
 251 static int armada_drm_remove(struct platform_device *pdev)
 252 {
 253         component_master_del(&pdev->dev, &armada_master_ops);
 254         return 0;
 255 }
 256
 257 static const struct platform_device_id armada_drm_platform_ids[] = {
 258         {
 259                 .name           = "armada-drm",
 260         }, {
 261                 .name           = "armada-510-drm",
 262         },
 263         { },
 264 };
 265 MODULE_DEVICE_TABLE(platform, armada_drm_platform_ids);
 266
 267 static struct platform_driver armada_drm_platform_driver = {
 268         .probe  = armada_drm_probe,
 269         .remove = armada_drm_remove,
 270         .driver = {
 271                 .name   = "armada-drm",
 272         },
 273         .id_table = armada_drm_platform_ids,
 274 };
 275
 276 static int __init armada_drm_init(void)
 277 {
 278         int ret;
 279
 280         armada_drm_driver.num_ioctls = ARRAY_SIZE(armada_ioctls);
 281
 282         ret = platform_driver_register(&armada_lcd_platform_driver);
 283         if (ret)
 284                 return ret;
 285         ret = platform_driver_register(&armada_drm_platform_driver);
 286         if (ret)
 287                 platform_driver_unregister(&armada_lcd_platform_driver);
 288         return ret;
 289 }
 290 module_init(armada_drm_init);
 291
 292 static void __exit armada_drm_exit(void)
 293 {
 294         platform_driver_unregister(&armada_drm_platform_driver);
 295         platform_driver_unregister(&armada_lcd_platform_driver);
 296 }
 297 module_exit(armada_drm_exit);
 298
 299 MODULE_AUTHOR("Russell King <rmk+kernel@armlinux.org.uk>");
 300 MODULE_DESCRIPTION("Armada DRM Driver");
 301 MODULE_LICENSE("GPL");
 302 MODULE_ALIAS("platform:armada-drm");