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         .gem_prime_import       = armada_gem_prime_import,
  41         .dumb_create            = armada_gem_dumb_create,
  42         .major                  = 1,
  43         .minor                  = 0,
  44         .name                   = "armada-drm",
  45         .desc                   = "Armada SoC DRM",
  46         .date                   = "20120730",
  47         .driver_features        = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
  48         .ioctls                 = armada_ioctls,
  49         .num_ioctls = ARRAY_SIZE(armada_ioctls),
  50         .fops                   = &armada_drm_fops,
  51 };
  52
  53 static const struct drm_mode_config_funcs armada_drm_mode_config_funcs = {
  54         .fb_create              = armada_fb_create,
  55         .atomic_check           = drm_atomic_helper_check,
  56         .atomic_commit          = drm_atomic_helper_commit,
  57 };
  58
  59 static int armada_drm_bind(struct device *dev)
  60 {
  61         struct armada_private *priv;
  62         struct resource *mem = NULL;
  63         int ret, n;
  64
  65         for (n = 0; ; n++) {
  66                 struct resource *r = platform_get_resource(to_platform_device(dev),
  67                                                            IORESOURCE_MEM, n);
  68                 if (!r)
  69                         break;
  70
  71                 /* Resources above 64K are graphics memory */
  72                 if (resource_size(r) > SZ_64K)
  73                         mem = r;
  74                 else
  75                         return -EINVAL;
  76         }
  77
  78         if (!mem)
  79                 return -ENXIO;
  80
  81         if (!devm_request_mem_region(dev, mem->start, resource_size(mem),
  82                                      "armada-drm"))
  83                 return -EBUSY;
  84
  85         priv = devm_drm_dev_alloc(dev, &armada_drm_driver,
  86                                   struct armada_private, drm);
  87         if (IS_ERR(priv)) {
  88                 dev_err(dev, "[" DRM_NAME ":%s] devm_drm_dev_alloc failed: %li\n",
  89                         __func__, PTR_ERR(priv));
  90                 return PTR_ERR(priv);
  91         }
  92
  93         /* Remove early framebuffers */
  94         ret = drm_aperture_remove_framebuffers(&armada_drm_driver);
  95         if (ret) {
  96                 dev_err(dev, "[" DRM_NAME ":%s] can't kick out simple-fb: %d\n",
  97                         __func__, ret);
  98                 return ret;
  99         }
 100
 101         dev_set_drvdata(dev, &priv->drm);
 102
 103         /* Mode setting support */
 104         drm_mode_config_init(&priv->drm);
 105         priv->drm.mode_config.min_width = 320;
 106         priv->drm.mode_config.min_height = 200;
 107
 108         /*
 109          * With vscale enabled, the maximum width is 1920 due to the
 110          * 1920 by 3 lines RAM
 111          */
 112         priv->drm.mode_config.max_width = 1920;
 113         priv->drm.mode_config.max_height = 2048;
 114
 115         priv->drm.mode_config.preferred_depth = 24;
 116         priv->drm.mode_config.funcs = &armada_drm_mode_config_funcs;
 117         drm_mm_init(&priv->linear, mem->start, resource_size(mem));
 118         mutex_init(&priv->linear_lock);
 119
 120         ret = component_bind_all(dev, &priv->drm);
 121         if (ret)
 122                 goto err_kms;
 123
 124         ret = drm_vblank_init(&priv->drm, priv->drm.mode_config.num_crtc);
 125         if (ret)
 126                 goto err_comp;
 127
 128         drm_mode_config_reset(&priv->drm);
 129
 130         drm_kms_helper_poll_init(&priv->drm);
 131
 132         ret = drm_dev_register(&priv->drm, 0);
 133         if (ret)
 134                 goto err_poll;
 135
 136 #ifdef CONFIG_DEBUG_FS
 137         armada_drm_debugfs_init(priv->drm.primary);
 138 #endif
 139
 140         armada_fbdev_setup(&priv->drm);
 141
 142         return 0;
 143
 144  err_poll:
 145         drm_kms_helper_poll_fini(&priv->drm);
 146  err_comp:
 147         component_unbind_all(dev, &priv->drm);
 148  err_kms:
 149         drm_mode_config_cleanup(&priv->drm);
 150         drm_mm_takedown(&priv->linear);
 151         dev_set_drvdata(dev, NULL);
 152         return ret;
 153 }
 154
 155 static void armada_drm_unbind(struct device *dev)
 156 {
 157         struct drm_device *drm = dev_get_drvdata(dev);
 158         struct armada_private *priv = drm_to_armada_dev(drm);
 159
 160         drm_kms_helper_poll_fini(&priv->drm);
 161
 162         drm_dev_unregister(&priv->drm);
 163
 164         drm_atomic_helper_shutdown(&priv->drm);
 165
 166         component_unbind_all(dev, &priv->drm);
 167
 168         drm_mode_config_cleanup(&priv->drm);
 169         drm_mm_takedown(&priv->linear);
 170         dev_set_drvdata(dev, NULL);
 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 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");