drivers/gpu/drm/zte/zx_drm_drv.c

   1 /*
   2  * Copyright 2016 Linaro Ltd.
   3  * Copyright 2016 ZTE Corporation.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License version 2 as
   7  * published by the Free Software Foundation.
   8  *
   9  */
  10
  11 #include <linux/clk.h>
  12 #include <linux/component.h>
  13 #include <linux/list.h>
  14 #include <linux/module.h>
  15 #include <linux/of_graph.h>
  16 #include <linux/of_platform.h>
  17 #include <linux/spinlock.h>
  18
  19 #include <drm/drm_atomic_helper.h>
  20 #include <drm/drm_crtc.h>
  21 #include <drm/drm_crtc_helper.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_of.h>
  26 #include <drm/drmP.h>
  27
  28 #include "zx_drm_drv.h"
  29 #include "zx_vou.h"
  30
  31 struct zx_drm_private {
  32         struct drm_fbdev_cma *fbdev;
  33 };
  34
  35 static void zx_drm_fb_output_poll_changed(struct drm_device *drm)
  36 {
  37         struct zx_drm_private *priv = drm->dev_private;
  38
  39         drm_fbdev_cma_hotplug_event(priv->fbdev);
  40 }
  41
  42 static const struct drm_mode_config_funcs zx_drm_mode_config_funcs = {
  43         .fb_create = drm_fb_cma_create,
  44         .output_poll_changed = zx_drm_fb_output_poll_changed,
  45         .atomic_check = drm_atomic_helper_check,
  46         .atomic_commit = drm_atomic_helper_commit,
  47 };
  48
  49 static void zx_drm_lastclose(struct drm_device *drm)
  50 {
  51         struct zx_drm_private *priv = drm->dev_private;
  52
  53         drm_fbdev_cma_restore_mode(priv->fbdev);
  54 }
  55
  56 static const struct file_operations zx_drm_fops = {
  57         .owner = THIS_MODULE,
  58         .open = drm_open,
  59         .release = drm_release,
  60         .unlocked_ioctl = drm_ioctl,
  61 #ifdef CONFIG_COMPAT
  62         .compat_ioctl = drm_compat_ioctl,
  63 #endif
  64         .poll = drm_poll,
  65         .read = drm_read,
  66         .llseek = noop_llseek,
  67         .mmap = drm_gem_cma_mmap,
  68 };
  69
  70 static struct drm_driver zx_drm_driver = {
  71         .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_PRIME |
  72                            DRIVER_ATOMIC,
  73         .lastclose = zx_drm_lastclose,
  74         .get_vblank_counter = drm_vblank_no_hw_counter,
  75         .enable_vblank = zx_vou_enable_vblank,
  76         .disable_vblank = zx_vou_disable_vblank,
  77         .gem_free_object = drm_gem_cma_free_object,
  78         .gem_vm_ops = &drm_gem_cma_vm_ops,
  79         .dumb_create = drm_gem_cma_dumb_create,
  80         .dumb_map_offset = drm_gem_cma_dumb_map_offset,
  81         .dumb_destroy = drm_gem_dumb_destroy,
  82         .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
  83         .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
  84         .gem_prime_export = drm_gem_prime_export,
  85         .gem_prime_import = drm_gem_prime_import,
  86         .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
  87         .gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
  88         .gem_prime_vmap = drm_gem_cma_prime_vmap,
  89         .gem_prime_vunmap = drm_gem_cma_prime_vunmap,
  90         .gem_prime_mmap = drm_gem_cma_prime_mmap,
  91         .fops = &zx_drm_fops,
  92         .name = "zx-vou",
  93         .desc = "ZTE VOU Controller DRM",
  94         .date = "20160811",
  95         .major = 1,
  96         .minor = 0,
  97 };
  98
  99 static int zx_drm_bind(struct device *dev)
 100 {
 101         struct drm_device *drm;
 102         struct zx_drm_private *priv;
 103         int ret;
 104
 105         priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
 106         if (!priv)
 107                 return -ENOMEM;
 108
 109         drm = drm_dev_alloc(&zx_drm_driver, dev);
 110         if (IS_ERR(drm))
 111                 return PTR_ERR(drm);
 112
 113         drm->dev_private = priv;
 114         dev_set_drvdata(dev, drm);
 115
 116         drm_mode_config_init(drm);
 117         drm->mode_config.min_width = 16;
 118         drm->mode_config.min_height = 16;
 119         drm->mode_config.max_width = 4096;
 120         drm->mode_config.max_height = 4096;
 121         drm->mode_config.funcs = &zx_drm_mode_config_funcs;
 122
 123         ret = component_bind_all(dev, drm);
 124         if (ret) {
 125                 DRM_DEV_ERROR(dev, "failed to bind all components: %d\n", ret);
 126                 goto out_unregister;
 127         }
 128
 129         ret = drm_vblank_init(drm, drm->mode_config.num_crtc);
 130         if (ret < 0) {
 131                 DRM_DEV_ERROR(dev, "failed to init vblank: %d\n", ret);
 132                 goto out_unbind;
 133         }
 134
 135         /*
 136          * We will manage irq handler on our own.  In this case, irq_enabled
 137          * need to be true for using vblank core support.
 138          */
 139         drm->irq_enabled = true;
 140
 141         drm_mode_config_reset(drm);
 142         drm_kms_helper_poll_init(drm);
 143
 144         priv->fbdev = drm_fbdev_cma_init(drm, 32,
 145                                          drm->mode_config.num_connector);
 146         if (IS_ERR(priv->fbdev)) {
 147                 ret = PTR_ERR(priv->fbdev);
 148                 DRM_DEV_ERROR(dev, "failed to init cma fbdev: %d\n", ret);
 149                 priv->fbdev = NULL;
 150                 goto out_poll_fini;
 151         }
 152
 153         ret = drm_dev_register(drm, 0);
 154         if (ret)
 155                 goto out_fbdev_fini;
 156
 157         return 0;
 158
 159 out_fbdev_fini:
 160         if (priv->fbdev) {
 161                 drm_fbdev_cma_fini(priv->fbdev);
 162                 priv->fbdev = NULL;
 163         }
 164 out_poll_fini:
 165         drm_kms_helper_poll_fini(drm);
 166         drm_mode_config_cleanup(drm);
 167         drm_vblank_cleanup(drm);
 168 out_unbind:
 169         component_unbind_all(dev, drm);
 170 out_unregister:
 171         dev_set_drvdata(dev, NULL);
 172         drm->dev_private = NULL;
 173         drm_dev_unref(drm);
 174         return ret;
 175 }
 176
 177 static void zx_drm_unbind(struct device *dev)
 178 {
 179         struct drm_device *drm = dev_get_drvdata(dev);
 180         struct zx_drm_private *priv = drm->dev_private;
 181
 182         drm_dev_unregister(drm);
 183         if (priv->fbdev) {
 184                 drm_fbdev_cma_fini(priv->fbdev);
 185                 priv->fbdev = NULL;
 186         }
 187         drm_kms_helper_poll_fini(drm);
 188         drm_mode_config_cleanup(drm);
 189         drm_vblank_cleanup(drm);
 190         component_unbind_all(dev, drm);
 191         dev_set_drvdata(dev, NULL);
 192         drm->dev_private = NULL;
 193         drm_dev_unref(drm);
 194 }
 195
 196 static const struct component_master_ops zx_drm_master_ops = {
 197         .bind = zx_drm_bind,
 198         .unbind = zx_drm_unbind,
 199 };
 200
 201 static int compare_of(struct device *dev, void *data)
 202 {
 203         return dev->of_node == data;
 204 }
 205
 206 static int zx_drm_probe(struct platform_device *pdev)
 207 {
 208         struct device *dev = &pdev->dev;
 209         struct device_node *parent = dev->of_node;
 210         struct device_node *child;
 211         struct component_match *match = NULL;
 212         int ret;
 213
 214         ret = of_platform_populate(parent, NULL, NULL, dev);
 215         if (ret)
 216                 return ret;
 217
 218         for_each_available_child_of_node(parent, child) {
 219                 component_match_add(dev, &match, compare_of, child);
 220                 of_node_put(child);
 221         }
 222
 223         return component_master_add_with_match(dev, &zx_drm_master_ops, match);
 224 }
 225
 226 static int zx_drm_remove(struct platform_device *pdev)
 227 {
 228         component_master_del(&pdev->dev, &zx_drm_master_ops);
 229         return 0;
 230 }
 231
 232 static const struct of_device_id zx_drm_of_match[] = {
 233         { .compatible = "zte,zx296718-vou", },
 234         { /* end */ },
 235 };
 236 MODULE_DEVICE_TABLE(of, zx_drm_of_match);
 237
 238 static struct platform_driver zx_drm_platform_driver = {
 239         .probe = zx_drm_probe,
 240         .remove = zx_drm_remove,
 241         .driver = {
 242                 .name = "zx-drm",
 243                 .of_match_table = zx_drm_of_match,
 244         },
 245 };
 246
 247 static struct platform_driver *drivers[] = {
 248         &zx_crtc_driver,
 249         &zx_hdmi_driver,
 250         &zx_tvenc_driver,
 251         &zx_drm_platform_driver,
 252 };
 253
 254 static int zx_drm_init(void)
 255 {
 256         return platform_register_drivers(drivers, ARRAY_SIZE(drivers));
 257 }
 258 module_init(zx_drm_init);
 259
 260 static void zx_drm_exit(void)
 261 {
 262         platform_unregister_drivers(drivers, ARRAY_SIZE(drivers));
 263 }
 264 module_exit(zx_drm_exit);
 265
 266 MODULE_AUTHOR("Shawn Guo <shawn.guo@linaro.org>");
 267 MODULE_DESCRIPTION("ZTE ZX VOU DRM driver");
 268 MODULE_LICENSE("GPL v2");