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.h>
  10 #include <linux/of_graph.h>
  11 #include <linux/platform_device.h>
  12
  13 #include <drm/drm_aperture.h>
  14 #include <drm/drm_atomic_helper.h>
  15 #include <drm/drm_drv.h>
  16 #include <drm/drm_ioctl.h>
  17 #include <drm/drm_managed.h>
  18 #include <drm/drm_prime.h>
  19 #include <drm/drm_probe_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         .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         .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 = drm_aperture_remove_framebuffers(&armada_drm_driver);
  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         armada_fbdev_setup(&priv->drm);
 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         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 }
 172
 173 static void armada_add_endpoints(struct device *dev,
 174         struct component_match **match, struct device_node *dev_node)
 175 {
 176         struct device_node *ep, *remote;
 177
 178         for_each_endpoint_of_node(dev_node, ep) {
 179                 remote = of_graph_get_remote_port_parent(ep);
 180                 if (remote && of_device_is_available(remote))
 181                         drm_of_component_match_add(dev, match, component_compare_of,
 182                                                    remote);
 183                 of_node_put(remote);
 184         }
 185 }
 186
 187 static const struct component_master_ops armada_master_ops = {
 188         .bind = armada_drm_bind,
 189         .unbind = armada_drm_unbind,
 190 };
 191
 192 static int armada_drm_probe(struct platform_device *pdev)
 193 {
 194         struct component_match *match = NULL;
 195         struct device *dev = &pdev->dev;
 196         int ret;
 197
 198         ret = drm_of_component_probe(dev, component_compare_dev_name, &armada_master_ops);
 199         if (ret != -EINVAL)
 200                 return ret;
 201
 202         if (dev->platform_data) {
 203                 char **devices = dev->platform_data;
 204                 struct device *d;
 205                 int i;
 206
 207                 for (i = 0; devices[i]; i++)
 208                         component_match_add(dev, &match, component_compare_dev_name,
 209                                             devices[i]);
 210
 211                 if (i == 0) {
 212                         dev_err(dev, "missing 'ports' property\n");
 213                         return -ENODEV;
 214                 }
 215
 216                 for (i = 0; devices[i]; i++) {
 217                         d = bus_find_device_by_name(&platform_bus_type, NULL,
 218                                                     devices[i]);
 219                         if (d && d->of_node)
 220                                 armada_add_endpoints(dev, &match, d->of_node);
 221                         put_device(d);
 222                 }
 223         }
 224
 225         return component_master_add_with_match(&pdev->dev, &armada_master_ops,
 226                                                match);
 227 }
 228
 229 static int armada_drm_remove(struct platform_device *pdev)
 230 {
 231         component_master_del(&pdev->dev, &armada_master_ops);
 232         return 0;
 233 }
 234
 235 static const struct platform_device_id armada_drm_platform_ids[] = {
 236         {
 237                 .name           = "armada-drm",
 238         }, {
 239                 .name           = "armada-510-drm",
 240         },
 241         { },
 242 };
 243 MODULE_DEVICE_TABLE(platform, armada_drm_platform_ids);
 244
 245 static struct platform_driver armada_drm_platform_driver = {
 246         .probe  = armada_drm_probe,
 247         .remove = armada_drm_remove,
 248         .driver = {
 249                 .name   = "armada-drm",
 250         },
 251         .id_table = armada_drm_platform_ids,
 252 };
 253
 254 static int __init armada_drm_init(void)
 255 {
 256         int ret;
 257
 258         if (drm_firmware_drivers_only())
 259                 return -ENODEV;
 260
 261         ret = platform_driver_register(&armada_lcd_platform_driver);
 262         if (ret)
 263                 return ret;
 264         ret = platform_driver_register(&armada_drm_platform_driver);
 265         if (ret)
 266                 platform_driver_unregister(&armada_lcd_platform_driver);
 267         return ret;
 268 }
 269 module_init(armada_drm_init);
 270
 271 static void __exit armada_drm_exit(void)
 272 {
 273         platform_driver_unregister(&armada_drm_platform_driver);
 274         platform_driver_unregister(&armada_lcd_platform_driver);
 275 }
 276 module_exit(armada_drm_exit);
 277
 278 MODULE_AUTHOR("Russell King <[email protected]>");
 279 MODULE_DESCRIPTION("Armada DRM Driver");
 280 MODULE_LICENSE("GPL");
 281 MODULE_ALIAS("platform:armada-drm");