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 DEFINE_DRM_GEM_CMA_FOPS(zx_drm_fops);
  57
  58 static struct drm_driver zx_drm_driver = {
  59         .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_PRIME |
  60                            DRIVER_ATOMIC,
  61         .lastclose = zx_drm_lastclose,
  62         .gem_free_object = drm_gem_cma_free_object,
  63         .gem_vm_ops = &drm_gem_cma_vm_ops,
  64         .dumb_create = drm_gem_cma_dumb_create,
  65         .dumb_map_offset = drm_gem_cma_dumb_map_offset,
  66         .dumb_destroy = drm_gem_dumb_destroy,
  67         .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
  68         .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
  69         .gem_prime_export = drm_gem_prime_export,
  70         .gem_prime_import = drm_gem_prime_import,
  71         .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
  72         .gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
  73         .gem_prime_vmap = drm_gem_cma_prime_vmap,
  74         .gem_prime_vunmap = drm_gem_cma_prime_vunmap,
  75         .gem_prime_mmap = drm_gem_cma_prime_mmap,
  76         .fops = &zx_drm_fops,
  77         .name = "zx-vou",
  78         .desc = "ZTE VOU Controller DRM",
  79         .date = "20160811",
  80         .major = 1,
  81         .minor = 0,
  82 };
  83
  84 static int zx_drm_bind(struct device *dev)
  85 {
  86         struct drm_device *drm;
  87         struct zx_drm_private *priv;
  88         int ret;
  89
  90         priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
  91         if (!priv)
  92                 return -ENOMEM;
  93
  94         drm = drm_dev_alloc(&zx_drm_driver, dev);
  95         if (IS_ERR(drm))
  96                 return PTR_ERR(drm);
  97
  98         drm->dev_private = priv;
  99         dev_set_drvdata(dev, drm);
 100
 101         drm_mode_config_init(drm);
 102         drm->mode_config.min_width = 16;
 103         drm->mode_config.min_height = 16;
 104         drm->mode_config.max_width = 4096;
 105         drm->mode_config.max_height = 4096;
 106         drm->mode_config.funcs = &zx_drm_mode_config_funcs;
 107
 108         ret = component_bind_all(dev, drm);
 109         if (ret) {
 110                 DRM_DEV_ERROR(dev, "failed to bind all components: %d\n", ret);
 111                 goto out_unregister;
 112         }
 113
 114         ret = drm_vblank_init(drm, drm->mode_config.num_crtc);
 115         if (ret < 0) {
 116                 DRM_DEV_ERROR(dev, "failed to init vblank: %d\n", ret);
 117                 goto out_unbind;
 118         }
 119
 120         /*
 121          * We will manage irq handler on our own.  In this case, irq_enabled
 122          * need to be true for using vblank core support.
 123          */
 124         drm->irq_enabled = true;
 125
 126         drm_mode_config_reset(drm);
 127         drm_kms_helper_poll_init(drm);
 128
 129         priv->fbdev = drm_fbdev_cma_init(drm, 32,
 130                                          drm->mode_config.num_connector);
 131         if (IS_ERR(priv->fbdev)) {
 132                 ret = PTR_ERR(priv->fbdev);
 133                 DRM_DEV_ERROR(dev, "failed to init cma fbdev: %d\n", ret);
 134                 priv->fbdev = NULL;
 135                 goto out_poll_fini;
 136         }
 137
 138         ret = drm_dev_register(drm, 0);
 139         if (ret)
 140                 goto out_fbdev_fini;
 141
 142         return 0;
 143
 144 out_fbdev_fini:
 145         if (priv->fbdev) {
 146                 drm_fbdev_cma_fini(priv->fbdev);
 147                 priv->fbdev = NULL;
 148         }
 149 out_poll_fini:
 150         drm_kms_helper_poll_fini(drm);
 151         drm_mode_config_cleanup(drm);
 152         drm_vblank_cleanup(drm);
 153 out_unbind:
 154         component_unbind_all(dev, drm);
 155 out_unregister:
 156         dev_set_drvdata(dev, NULL);
 157         drm->dev_private = NULL;
 158         drm_dev_unref(drm);
 159         return ret;
 160 }
 161
 162 static void zx_drm_unbind(struct device *dev)
 163 {
 164         struct drm_device *drm = dev_get_drvdata(dev);
 165         struct zx_drm_private *priv = drm->dev_private;
 166
 167         drm_dev_unregister(drm);
 168         if (priv->fbdev) {
 169                 drm_fbdev_cma_fini(priv->fbdev);
 170                 priv->fbdev = NULL;
 171         }
 172         drm_kms_helper_poll_fini(drm);
 173         drm_mode_config_cleanup(drm);
 174         drm_vblank_cleanup(drm);
 175         component_unbind_all(dev, drm);
 176         dev_set_drvdata(dev, NULL);
 177         drm->dev_private = NULL;
 178         drm_dev_unref(drm);
 179 }
 180
 181 static const struct component_master_ops zx_drm_master_ops = {
 182         .bind = zx_drm_bind,
 183         .unbind = zx_drm_unbind,
 184 };
 185
 186 static int compare_of(struct device *dev, void *data)
 187 {
 188         return dev->of_node == data;
 189 }
 190
 191 static int zx_drm_probe(struct platform_device *pdev)
 192 {
 193         struct device *dev = &pdev->dev;
 194         struct device_node *parent = dev->of_node;
 195         struct device_node *child;
 196         struct component_match *match = NULL;
 197         int ret;
 198
 199         ret = devm_of_platform_populate(dev);
 200         if (ret)
 201                 return ret;
 202
 203         for_each_available_child_of_node(parent, child) {
 204                 component_match_add(dev, &match, compare_of, child);
 205                 of_node_put(child);
 206         }
 207
 208         return component_master_add_with_match(dev, &zx_drm_master_ops, match);
 209 }
 210
 211 static int zx_drm_remove(struct platform_device *pdev)
 212 {
 213         component_master_del(&pdev->dev, &zx_drm_master_ops);
 214         return 0;
 215 }
 216
 217 static const struct of_device_id zx_drm_of_match[] = {
 218         { .compatible = "zte,zx296718-vou", },
 219         { /* end */ },
 220 };
 221 MODULE_DEVICE_TABLE(of, zx_drm_of_match);
 222
 223 static struct platform_driver zx_drm_platform_driver = {
 224         .probe = zx_drm_probe,
 225         .remove = zx_drm_remove,
 226         .driver = {
 227                 .name = "zx-drm",
 228                 .of_match_table = zx_drm_of_match,
 229         },
 230 };
 231
 232 static struct platform_driver *drivers[] = {
 233         &zx_crtc_driver,
 234         &zx_hdmi_driver,
 235         &zx_tvenc_driver,
 236         &zx_vga_driver,
 237         &zx_drm_platform_driver,
 238 };
 239
 240 static int zx_drm_init(void)
 241 {
 242         return platform_register_drivers(drivers, ARRAY_SIZE(drivers));
 243 }
 244 module_init(zx_drm_init);
 245
 246 static void zx_drm_exit(void)
 247 {
 248         platform_unregister_drivers(drivers, ARRAY_SIZE(drivers));
 249 }
 250 module_exit(zx_drm_exit);
 251
 252 MODULE_AUTHOR("Shawn Guo <shawn.guo@linaro.org>");
 253 MODULE_DESCRIPTION("ZTE ZX VOU DRM driver");
 254 MODULE_LICENSE("GPL v2");