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                 kfree(priv);
 106                 return ret;
 107         }
 108
 109         dev_set_drvdata(dev, &priv->drm);
 110
 111         /* Mode setting support */
 112         drm_mode_config_init(&priv->drm);
 113         priv->drm.mode_config.min_width = 320;
 114         priv->drm.mode_config.min_height = 200;
 115
 116         /*
 117          * With vscale enabled, the maximum width is 1920 due to the
 118          * 1920 by 3 lines RAM
 119          */
 120         priv->drm.mode_config.max_width = 1920;
 121         priv->drm.mode_config.max_height = 2048;
 122
 123         priv->drm.mode_config.preferred_depth = 24;
 124         priv->drm.mode_config.funcs = &armada_drm_mode_config_funcs;
 125         drm_mm_init(&priv->linear, mem->start, resource_size(mem));
 126         mutex_init(&priv->linear_lock);
 127
 128         ret = component_bind_all(dev, &priv->drm);
 129         if (ret)
 130                 goto err_kms;
 131
 132         ret = drm_vblank_init(&priv->drm, priv->drm.mode_config.num_crtc);
 133         if (ret)
 134                 goto err_comp;
 135
 136         priv->drm.irq_enabled = true;
 137
 138         drm_mode_config_reset(&priv->drm);
 139
 140         ret = armada_fbdev_init(&priv->drm);
 141         if (ret)
 142                 goto err_comp;
 143
 144         drm_kms_helper_poll_init(&priv->drm);
 145
 146         ret = drm_dev_register(&priv->drm, 0);
 147         if (ret)
 148                 goto err_poll;
 149
 150 #ifdef CONFIG_DEBUG_FS
 151         armada_drm_debugfs_init(priv->drm.primary);
 152 #endif
 153
 154         return 0;
 155
 156  err_poll:
 157         drm_kms_helper_poll_fini(&priv->drm);
 158         armada_fbdev_fini(&priv->drm);
 159  err_comp:
 160         component_unbind_all(dev, &priv->drm);
 161  err_kms:
 162         drm_mode_config_cleanup(&priv->drm);
 163         drm_mm_takedown(&priv->linear);
 164         return ret;
 165 }
 166
 167 static void armada_drm_unbind(struct device *dev)
 168 {
 169         struct drm_device *drm = dev_get_drvdata(dev);
 170         struct armada_private *priv = drm_to_armada_dev(drm);
 171
 172         drm_kms_helper_poll_fini(&priv->drm);
 173         armada_fbdev_fini(&priv->drm);
 174
 175         drm_dev_unregister(&priv->drm);
 176
 177         drm_atomic_helper_shutdown(&priv->drm);
 178
 179         component_unbind_all(dev, &priv->drm);
 180
 181         drm_mode_config_cleanup(&priv->drm);
 182         drm_mm_takedown(&priv->linear);
 183 }
 184
 185 static int compare_of(struct device *dev, void *data)
 186 {
 187         return dev->of_node == data;
 188 }
 189
 190 static int compare_dev_name(struct device *dev, void *data)
 191 {
 192         const char *name = data;
 193         return !strcmp(dev_name(dev), name);
 194 }
 195
 196 static void armada_add_endpoints(struct device *dev,
 197         struct component_match **match, struct device_node *dev_node)
 198 {
 199         struct device_node *ep, *remote;
 200
 201         for_each_endpoint_of_node(dev_node, ep) {
 202                 remote = of_graph_get_remote_port_parent(ep);
 203                 if (remote && of_device_is_available(remote))
 204                         drm_of_component_match_add(dev, match, compare_of,
 205                                                    remote);
 206                 of_node_put(remote);
 207         }
 208 }
 209
 210 static const struct component_master_ops armada_master_ops = {
 211         .bind = armada_drm_bind,
 212         .unbind = armada_drm_unbind,
 213 };
 214
 215 static int armada_drm_probe(struct platform_device *pdev)
 216 {
 217         struct component_match *match = NULL;
 218         struct device *dev = &pdev->dev;
 219         int ret;
 220
 221         ret = drm_of_component_probe(dev, compare_dev_name, &armada_master_ops);
 222         if (ret != -EINVAL)
 223                 return ret;
 224
 225         if (dev->platform_data) {
 226                 char **devices = dev->platform_data;
 227                 struct device *d;
 228                 int i;
 229
 230                 for (i = 0; devices[i]; i++)
 231                         component_match_add(dev, &match, compare_dev_name,
 232                                             devices[i]);
 233
 234                 if (i == 0) {
 235                         dev_err(dev, "missing 'ports' property\n");
 236                         return -ENODEV;
 237                 }
 238
 239                 for (i = 0; devices[i]; i++) {
 240                         d = bus_find_device_by_name(&platform_bus_type, NULL,
 241                                                     devices[i]);
 242                         if (d && d->of_node)
 243                                 armada_add_endpoints(dev, &match, d->of_node);
 244                         put_device(d);
 245                 }
 246         }
 247
 248         return component_master_add_with_match(&pdev->dev, &armada_master_ops,
 249                                                match);
 250 }
 251
 252 static int armada_drm_remove(struct platform_device *pdev)
 253 {
 254         component_master_del(&pdev->dev, &armada_master_ops);
 255         return 0;
 256 }
 257
 258 static const struct platform_device_id armada_drm_platform_ids[] = {
 259         {
 260                 .name           = "armada-drm",
 261         }, {
 262                 .name           = "armada-510-drm",
 263         },
 264         { },
 265 };
 266 MODULE_DEVICE_TABLE(platform, armada_drm_platform_ids);
 267
 268 static struct platform_driver armada_drm_platform_driver = {
 269         .probe  = armada_drm_probe,
 270         .remove = armada_drm_remove,
 271         .driver = {
 272                 .name   = "armada-drm",
 273         },
 274         .id_table = armada_drm_platform_ids,
 275 };
 276
 277 static int __init armada_drm_init(void)
 278 {
 279         int ret;
 280
 281         armada_drm_driver.num_ioctls = ARRAY_SIZE(armada_ioctls);
 282
 283         ret = platform_driver_register(&armada_lcd_platform_driver);
 284         if (ret)
 285                 return ret;
 286         ret = platform_driver_register(&armada_drm_platform_driver);
 287         if (ret)
 288                 platform_driver_unregister(&armada_lcd_platform_driver);
 289         return ret;
 290 }
 291 module_init(armada_drm_init);
 292
 293 static void __exit armada_drm_exit(void)
 294 {
 295         platform_driver_unregister(&armada_drm_platform_driver);
 296         platform_driver_unregister(&armada_lcd_platform_driver);
 297 }
 298 module_exit(armada_drm_exit);
 299
 300 MODULE_AUTHOR("Russell King <rmk+kernel@armlinux.org.uk>");
 301 MODULE_DESCRIPTION("Armada DRM Driver");
 302 MODULE_LICENSE("GPL");
 303 MODULE_ALIAS("platform:armada-drm");