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