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

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Hisilicon Kirin SoCs drm master driver
   4  *
   5  * Copyright (c) 2016 Linaro Limited.
   6  * Copyright (c) 2014-2016 Hisilicon Limited.
   7  *
   8  * Author:
   9  *      Xinliang Liu <z.liuxinliang@hisilicon.com>
  10  *      Xinliang Liu <xinliang.liu@linaro.org>
  11  *      Xinwei Kong <kong.kongxinwei@hisilicon.com>
  12  */
  13
  14 #include <linux/of_platform.h>
  15 #include <linux/component.h>
  16 #include <linux/module.h>
  17 #include <linux/of_graph.h>
  18 #include <linux/platform_device.h>
  19
  20 #include <drm/drm_atomic_helper.h>
  21 #include <drm/drm_drv.h>
  22 #include <drm/drm_fb_cma_helper.h>
  23 #include <drm/drm_fb_helper.h>
  24 #include <drm/drm_gem_cma_helper.h>
  25 #include <drm/drm_gem_framebuffer_helper.h>
  26 #include <drm/drm_of.h>
  27 #include <drm/drm_probe_helper.h>
  28 #include <drm/drm_vblank.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         drm_kms_helper_poll_fini(dev);
  37         dc_ops->cleanup(to_platform_device(dev->dev));
  38         drm_mode_config_cleanup(dev);
  39
  40         return 0;
  41 }
  42
  43 static const struct drm_mode_config_funcs kirin_drm_mode_config_funcs = {
  44         .fb_create = drm_gem_fb_create,
  45         .atomic_check = drm_atomic_helper_check,
  46         .atomic_commit = drm_atomic_helper_commit,
  47 };
  48
  49 static void kirin_drm_mode_config_init(struct drm_device *dev)
  50 {
  51         dev->mode_config.min_width = 0;
  52         dev->mode_config.min_height = 0;
  53
  54         dev->mode_config.max_width = 2048;
  55         dev->mode_config.max_height = 2048;
  56
  57         dev->mode_config.funcs = &kirin_drm_mode_config_funcs;
  58 }
  59
  60 static int kirin_drm_kms_init(struct drm_device *dev)
  61 {
  62         int ret;
  63
  64         dev_set_drvdata(dev->dev, dev);
  65
  66         /* dev->mode_config initialization */
  67         drm_mode_config_init(dev);
  68         kirin_drm_mode_config_init(dev);
  69
  70         /* display controller init */
  71         ret = dc_ops->init(to_platform_device(dev->dev));
  72         if (ret)
  73                 goto err_mode_config_cleanup;
  74
  75         /* bind and init sub drivers */
  76         ret = component_bind_all(dev->dev, dev);
  77         if (ret) {
  78                 DRM_ERROR("failed to bind all component.\n");
  79                 goto err_dc_cleanup;
  80         }
  81
  82         /* vblank init */
  83         ret = drm_vblank_init(dev, dev->mode_config.num_crtc);
  84         if (ret) {
  85                 DRM_ERROR("failed to initialize vblank.\n");
  86                 goto err_unbind_all;
  87         }
  88         /* with irq_enabled = true, we can use the vblank feature. */
  89         dev->irq_enabled = true;
  90
  91         /* reset all the states of crtc/plane/encoder/connector */
  92         drm_mode_config_reset(dev);
  93
  94         /* init kms poll for handling hpd */
  95         drm_kms_helper_poll_init(dev);
  96
  97         return 0;
  98
  99 err_unbind_all:
 100         component_unbind_all(dev->dev, dev);
 101 err_dc_cleanup:
 102         dc_ops->cleanup(to_platform_device(dev->dev));
 103 err_mode_config_cleanup:
 104         drm_mode_config_cleanup(dev);
 105
 106         return ret;
 107 }
 108
 109 DEFINE_DRM_GEM_CMA_FOPS(kirin_drm_fops);
 110
 111 static int kirin_gem_cma_dumb_create(struct drm_file *file,
 112                                      struct drm_device *dev,
 113                                      struct drm_mode_create_dumb *args)
 114 {
 115         return drm_gem_cma_dumb_create_internal(file, dev, args);
 116 }
 117
 118 static struct drm_driver kirin_drm_driver = {
 119         .driver_features        = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
 120         .fops                   = &kirin_drm_fops,
 121
 122         .gem_free_object_unlocked = drm_gem_cma_free_object,
 123         .gem_vm_ops             = &drm_gem_cma_vm_ops,
 124         .dumb_create            = kirin_gem_cma_dumb_create,
 125
 126         .prime_handle_to_fd     = drm_gem_prime_handle_to_fd,
 127         .prime_fd_to_handle     = drm_gem_prime_fd_to_handle,
 128         .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
 129         .gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
 130         .gem_prime_vmap         = drm_gem_cma_prime_vmap,
 131         .gem_prime_vunmap       = drm_gem_cma_prime_vunmap,
 132         .gem_prime_mmap         = drm_gem_cma_prime_mmap,
 133
 134         .name                   = "kirin",
 135         .desc                   = "Hisilicon Kirin SoCs' DRM Driver",
 136         .date                   = "20150718",
 137         .major                  = 1,
 138         .minor                  = 0,
 139 };
 140
 141 static int compare_of(struct device *dev, void *data)
 142 {
 143         return dev->of_node == data;
 144 }
 145
 146 static int kirin_drm_bind(struct device *dev)
 147 {
 148         struct drm_driver *driver = &kirin_drm_driver;
 149         struct drm_device *drm_dev;
 150         int ret;
 151
 152         drm_dev = drm_dev_alloc(driver, dev);
 153         if (IS_ERR(drm_dev))
 154                 return PTR_ERR(drm_dev);
 155
 156         ret = kirin_drm_kms_init(drm_dev);
 157         if (ret)
 158                 goto err_drm_dev_put;
 159
 160         ret = drm_dev_register(drm_dev, 0);
 161         if (ret)
 162                 goto err_kms_cleanup;
 163
 164         drm_fbdev_generic_setup(drm_dev, 32);
 165
 166         return 0;
 167
 168 err_kms_cleanup:
 169         kirin_drm_kms_cleanup(drm_dev);
 170 err_drm_dev_put:
 171         drm_dev_put(drm_dev);
 172
 173         return ret;
 174 }
 175
 176 static void kirin_drm_unbind(struct device *dev)
 177 {
 178         struct drm_device *drm_dev = dev_get_drvdata(dev);
 179
 180         drm_dev_unregister(drm_dev);
 181         kirin_drm_kms_cleanup(drm_dev);
 182         drm_dev_put(drm_dev);
 183 }
 184
 185 static const struct component_master_ops kirin_drm_ops = {
 186         .bind = kirin_drm_bind,
 187         .unbind = kirin_drm_unbind,
 188 };
 189
 190 static int kirin_drm_platform_probe(struct platform_device *pdev)
 191 {
 192         struct device *dev = &pdev->dev;
 193         struct device_node *np = dev->of_node;
 194         struct component_match *match = NULL;
 195         struct device_node *remote;
 196
 197         dc_ops = (struct kirin_dc_ops *)of_device_get_match_data(dev);
 198         if (!dc_ops) {
 199                 DRM_ERROR("failed to get dt id data\n");
 200                 return -EINVAL;
 201         }
 202
 203         remote = of_graph_get_remote_node(np, 0, 0);
 204         if (!remote)
 205                 return -ENODEV;
 206
 207         drm_of_component_match_add(dev, &match, compare_of, remote);
 208         of_node_put(remote);
 209
 210         return component_master_add_with_match(dev, &kirin_drm_ops, match);
 211
 212         return 0;
 213 }
 214
 215 static int kirin_drm_platform_remove(struct platform_device *pdev)
 216 {
 217         component_master_del(&pdev->dev, &kirin_drm_ops);
 218         dc_ops = NULL;
 219         return 0;
 220 }
 221
 222 static const struct of_device_id kirin_drm_dt_ids[] = {
 223         { .compatible = "hisilicon,hi6220-ade",
 224           .data = &ade_dc_ops,
 225         },
 226         { /* end node */ },
 227 };
 228 MODULE_DEVICE_TABLE(of, kirin_drm_dt_ids);
 229
 230 static struct platform_driver kirin_drm_platform_driver = {
 231         .probe = kirin_drm_platform_probe,
 232         .remove = kirin_drm_platform_remove,
 233         .driver = {
 234                 .name = "kirin-drm",
 235                 .of_match_table = kirin_drm_dt_ids,
 236         },
 237 };
 238
 239 module_platform_driver(kirin_drm_platform_driver);
 240
 241 MODULE_AUTHOR("Xinliang Liu <xinliang.liu@linaro.org>");
 242 MODULE_AUTHOR("Xinliang Liu <z.liuxinliang@hisilicon.com>");
 243 MODULE_AUTHOR("Xinwei Kong <kong.kongxinwei@hisilicon.com>");
 244 MODULE_DESCRIPTION("hisilicon Kirin SoCs' DRM master driver");
 245 MODULE_LICENSE("GPL v2");