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