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