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