drivers/gpu/drm/hisilicon/kirin/kirin_drm_drv.c

   1 /*
   2  * Hisilicon Kirin SoCs drm master driver
   3  *
   4  * Copyright (c) 2016 Linaro Limited.
   5  * Copyright (c) 2014-2016 Hisilicon Limited.
   6  *
   7  * Author:
   8  *      Xinliang Liu <z.liuxinliang@hisilicon.com>
   9  *      Xinliang Liu <xinliang.liu@linaro.org>
  10  *      Xinwei Kong <kong.kongxinwei@hisilicon.com>
  11  *
  12  * This program is free software; you can redistribute it and/or modify
  13  * it under the terms of the GNU General Public License version 2 as
  14  * published by the Free Software Foundation.
  15  *
  16  */
  17
  18 #include <linux/of_platform.h>
  19 #include <linux/component.h>
  20 #include <linux/of_graph.h>
  21
  22 #include <drm/drmP.h>
  23 #include <drm/drm_gem_cma_helper.h>
  24 #include <drm/drm_fb_cma_helper.h>
  25 #include <drm/drm_gem_framebuffer_helper.h>
  26 #include <drm/drm_atomic_helper.h>
  27 #include <drm/drm_crtc_helper.h>
  28 #include <drm/drm_of.h>
  29
  30 #include "kirin_drm_drv.h"
  31
  32 static struct kirin_dc_ops *dc_ops;
  33
  34 static int kirin_drm_kms_cleanup(struct drm_device *dev)
  35 {
  36         struct kirin_drm_private *priv = dev->dev_private;
  37
  38         if (priv->fbdev) {
  39                 drm_fbdev_cma_fini(priv->fbdev);
  40                 priv->fbdev = NULL;
  41         }
  42
  43         drm_kms_helper_poll_fini(dev);
  44         dc_ops->cleanup(to_platform_device(dev->dev));
  45         drm_mode_config_cleanup(dev);
  46         devm_kfree(dev->dev, priv);
  47         dev->dev_private = NULL;
  48
  49         return 0;
  50 }
  51
  52 static void kirin_fbdev_output_poll_changed(struct drm_device *dev)
  53 {
  54         struct kirin_drm_private *priv = dev->dev_private;
  55
  56         drm_fbdev_cma_hotplug_event(priv->fbdev);
  57 }
  58
  59 static const struct drm_mode_config_funcs kirin_drm_mode_config_funcs = {
  60         .fb_create = drm_gem_fb_create,
  61         .output_poll_changed = kirin_fbdev_output_poll_changed,
  62         .atomic_check = drm_atomic_helper_check,
  63         .atomic_commit = drm_atomic_helper_commit,
  64 };
  65
  66 static void kirin_drm_mode_config_init(struct drm_device *dev)
  67 {
  68         dev->mode_config.min_width = 0;
  69         dev->mode_config.min_height = 0;
  70
  71         dev->mode_config.max_width = 2048;
  72         dev->mode_config.max_height = 2048;
  73
  74         dev->mode_config.funcs = &kirin_drm_mode_config_funcs;
  75 }
  76
  77 static int kirin_drm_kms_init(struct drm_device *dev)
  78 {
  79         struct kirin_drm_private *priv;
  80         int ret;
  81
  82         priv = devm_kzalloc(dev->dev, sizeof(*priv), GFP_KERNEL);
  83         if (!priv)
  84                 return -ENOMEM;
  85
  86         dev->dev_private = priv;
  87         dev_set_drvdata(dev->dev, dev);
  88
  89         /* dev->mode_config initialization */
  90         drm_mode_config_init(dev);
  91         kirin_drm_mode_config_init(dev);
  92
  93         /* display controller init */
  94         ret = dc_ops->init(to_platform_device(dev->dev));
  95         if (ret)
  96                 goto err_mode_config_cleanup;
  97
  98         /* bind and init sub drivers */
  99         ret = component_bind_all(dev->dev, dev);
 100         if (ret) {
 101                 DRM_ERROR("failed to bind all component.\n");
 102                 goto err_dc_cleanup;
 103         }
 104
 105         /* vblank init */
 106         ret = drm_vblank_init(dev, dev->mode_config.num_crtc);
 107         if (ret) {
 108                 DRM_ERROR("failed to initialize vblank.\n");
 109                 goto err_unbind_all;
 110         }
 111         /* with irq_enabled = true, we can use the vblank feature. */
 112         dev->irq_enabled = true;
 113
 114         /* reset all the states of crtc/plane/encoder/connector */
 115         drm_mode_config_reset(dev);
 116
 117         /* init kms poll for handling hpd */
 118         drm_kms_helper_poll_init(dev);
 119
 120         priv->fbdev = drm_fbdev_cma_init(dev, 32,
 121                                          dev->mode_config.num_connector);
 122
 123         if (IS_ERR(priv->fbdev)) {
 124                 DRM_ERROR("failed to initialize fbdev.\n");
 125                 ret = PTR_ERR(priv->fbdev);
 126                 goto err_cleanup_poll;
 127         }
 128         return 0;
 129
 130 err_cleanup_poll:
 131         drm_kms_helper_poll_fini(dev);
 132 err_unbind_all:
 133         component_unbind_all(dev->dev, dev);
 134 err_dc_cleanup:
 135         dc_ops->cleanup(to_platform_device(dev->dev));
 136 err_mode_config_cleanup:
 137         drm_mode_config_cleanup(dev);
 138         devm_kfree(dev->dev, priv);
 139         dev->dev_private = NULL;
 140
 141         return ret;
 142 }
 143
 144 DEFINE_DRM_GEM_CMA_FOPS(kirin_drm_fops);
 145
 146 static int kirin_gem_cma_dumb_create(struct drm_file *file,
 147                                      struct drm_device *dev,
 148                                      struct drm_mode_create_dumb *args)
 149 {
 150         return drm_gem_cma_dumb_create_internal(file, dev, args);
 151 }
 152
 153 static struct drm_driver kirin_drm_driver = {
 154         .driver_features        = DRIVER_GEM | DRIVER_MODESET | DRIVER_PRIME |
 155                                   DRIVER_ATOMIC,
 156         .fops                   = &kirin_drm_fops,
 157
 158         .gem_free_object_unlocked = drm_gem_cma_free_object,
 159         .gem_vm_ops             = &drm_gem_cma_vm_ops,
 160         .dumb_create            = kirin_gem_cma_dumb_create,
 161
 162         .prime_handle_to_fd     = drm_gem_prime_handle_to_fd,
 163         .prime_fd_to_handle     = drm_gem_prime_fd_to_handle,
 164         .gem_prime_export       = drm_gem_prime_export,
 165         .gem_prime_import       = drm_gem_prime_import,
 166         .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
 167         .gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
 168         .gem_prime_vmap         = drm_gem_cma_prime_vmap,
 169         .gem_prime_vunmap       = drm_gem_cma_prime_vunmap,
 170         .gem_prime_mmap         = drm_gem_cma_prime_mmap,
 171
 172         .name                   = "kirin",
 173         .desc                   = "Hisilicon Kirin SoCs' DRM Driver",
 174         .date                   = "20150718",
 175         .major                  = 1,
 176         .minor                  = 0,
 177 };
 178
 179 static int compare_of(struct device *dev, void *data)
 180 {
 181         return dev->of_node == data;
 182 }
 183
 184 static int kirin_drm_bind(struct device *dev)
 185 {
 186         struct drm_driver *driver = &kirin_drm_driver;
 187         struct drm_device *drm_dev;
 188         int ret;
 189
 190         drm_dev = drm_dev_alloc(driver, dev);
 191         if (IS_ERR(drm_dev))
 192                 return PTR_ERR(drm_dev);
 193
 194         ret = kirin_drm_kms_init(drm_dev);
 195         if (ret)
 196                 goto err_drm_dev_unref;
 197
 198         ret = drm_dev_register(drm_dev, 0);
 199         if (ret)
 200                 goto err_kms_cleanup;
 201
 202         return 0;
 203
 204 err_kms_cleanup:
 205         kirin_drm_kms_cleanup(drm_dev);
 206 err_drm_dev_unref:
 207         drm_dev_unref(drm_dev);
 208
 209         return ret;
 210 }
 211
 212 static void kirin_drm_unbind(struct device *dev)
 213 {
 214         struct drm_device *drm_dev = dev_get_drvdata(dev);
 215
 216         drm_dev_unregister(drm_dev);
 217         kirin_drm_kms_cleanup(drm_dev);
 218         drm_dev_unref(drm_dev);
 219 }
 220
 221 static const struct component_master_ops kirin_drm_ops = {
 222         .bind = kirin_drm_bind,
 223         .unbind = kirin_drm_unbind,
 224 };
 225
 226 static int kirin_drm_platform_probe(struct platform_device *pdev)
 227 {
 228         struct device *dev = &pdev->dev;
 229         struct device_node *np = dev->of_node;
 230         struct component_match *match = NULL;
 231         struct device_node *remote;
 232
 233         dc_ops = (struct kirin_dc_ops *)of_device_get_match_data(dev);
 234         if (!dc_ops) {
 235                 DRM_ERROR("failed to get dt id data\n");
 236                 return -EINVAL;
 237         }
 238
 239         remote = of_graph_get_remote_node(np, 0, 0);
 240         if (!remote)
 241                 return -ENODEV;
 242
 243         drm_of_component_match_add(dev, &match, compare_of, remote);
 244         of_node_put(remote);
 245
 246         return component_master_add_with_match(dev, &kirin_drm_ops, match);
 247
 248         return 0;
 249 }
 250
 251 static int kirin_drm_platform_remove(struct platform_device *pdev)
 252 {
 253         component_master_del(&pdev->dev, &kirin_drm_ops);
 254         dc_ops = NULL;
 255         return 0;
 256 }
 257
 258 static const struct of_device_id kirin_drm_dt_ids[] = {
 259         { .compatible = "hisilicon,hi6220-ade",
 260           .data = &ade_dc_ops,
 261         },
 262         { /* end node */ },
 263 };
 264 MODULE_DEVICE_TABLE(of, kirin_drm_dt_ids);
 265
 266 static struct platform_driver kirin_drm_platform_driver = {
 267         .probe = kirin_drm_platform_probe,
 268         .remove = kirin_drm_platform_remove,
 269         .driver = {
 270                 .name = "kirin-drm",
 271                 .of_match_table = kirin_drm_dt_ids,
 272         },
 273 };
 274
 275 module_platform_driver(kirin_drm_platform_driver);
 276
 277 MODULE_AUTHOR("Xinliang Liu <xinliang.liu@linaro.org>");
 278 MODULE_AUTHOR("Xinliang Liu <z.liuxinliang@hisilicon.com>");
 279 MODULE_AUTHOR("Xinwei Kong <kong.kongxinwei@hisilicon.com>");
 280 MODULE_DESCRIPTION("hisilicon Kirin SoCs' DRM master driver");
 281 MODULE_LICENSE("GPL v2");