root/drivers/gpu/drm/arm/display/komeda/komeda_drv.c

DEFINITIONS

1. dev_to_mdev
2. komeda_unbind
3. komeda_bind
4. compare_of
5. komeda_add_slave
6. komeda_platform_probe
7. komeda_platform_remove

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * (C) COPYRIGHT 2018 ARM Limited. All rights reserved.
   4  * Author: James.Qian.Wang <james.qian.wang@arm.com>
   5  *
   6  */
   7 #include <linux/module.h>
   8 #include <linux/kernel.h>
   9 #include <linux/platform_device.h>
  10 #include <linux/component.h>
  11 #include <drm/drm_of.h>
  12 #include "komeda_dev.h"
  13 #include "komeda_kms.h"
  14 
  15 struct komeda_drv {
  16         struct komeda_dev *mdev;
  17         struct komeda_kms_dev *kms;
  18 };
  19 
  20 struct komeda_dev *dev_to_mdev(struct device *dev)
  21 {
  22         struct komeda_drv *mdrv = dev_get_drvdata(dev);
  23 
  24         return mdrv ? mdrv->mdev : NULL;
  25 }
  26 
  27 static void komeda_unbind(struct device *dev)
  28 {
  29         struct komeda_drv *mdrv = dev_get_drvdata(dev);
  30 
  31         if (!mdrv)
  32                 return;
  33 
  34         komeda_kms_detach(mdrv->kms);
  35         komeda_dev_destroy(mdrv->mdev);
  36 
  37         dev_set_drvdata(dev, NULL);
  38         devm_kfree(dev, mdrv);
  39 }
  40 
  41 static int komeda_bind(struct device *dev)
  42 {
  43         struct komeda_drv *mdrv;
  44         int err;
  45 
  46         mdrv = devm_kzalloc(dev, sizeof(*mdrv), GFP_KERNEL);
  47         if (!mdrv)
  48                 return -ENOMEM;
  49 
  50         mdrv->mdev = komeda_dev_create(dev);
  51         if (IS_ERR(mdrv->mdev)) {
  52                 err = PTR_ERR(mdrv->mdev);
  53                 goto free_mdrv;
  54         }
  55 
  56         mdrv->kms = komeda_kms_attach(mdrv->mdev);
  57         if (IS_ERR(mdrv->kms)) {
  58                 err = PTR_ERR(mdrv->kms);
  59                 goto destroy_mdev;
  60         }
  61 
  62         dev_set_drvdata(dev, mdrv);
  63 
  64         return 0;
  65 
  66 destroy_mdev:
  67         komeda_dev_destroy(mdrv->mdev);
  68 
  69 free_mdrv:
  70         devm_kfree(dev, mdrv);
  71         return err;
  72 }
  73 
  74 static const struct component_master_ops komeda_master_ops = {
  75         .bind   = komeda_bind,
  76         .unbind = komeda_unbind,
  77 };
  78 
  79 static int compare_of(struct device *dev, void *data)
  80 {
  81         return dev->of_node == data;
  82 }
  83 
  84 static void komeda_add_slave(struct device *master,
  85                              struct component_match **match,
  86                              struct device_node *np,
  87                              u32 port, u32 endpoint)
  88 {
  89         struct device_node *remote;
  90 
  91         remote = of_graph_get_remote_node(np, port, endpoint);
  92         if (remote) {
  93                 drm_of_component_match_add(master, match, compare_of, remote);
  94                 of_node_put(remote);
  95         }
  96 }
  97 
  98 static int komeda_platform_probe(struct platform_device *pdev)
  99 {
 100         struct device *dev = &pdev->dev;
 101         struct component_match *match = NULL;
 102         struct device_node *child;
 103 
 104         if (!dev->of_node)
 105                 return -ENODEV;
 106 
 107         for_each_available_child_of_node(dev->of_node, child) {
 108                 if (of_node_cmp(child->name, "pipeline") != 0)
 109                         continue;
 110 
 111                 /* add connector */
 112                 komeda_add_slave(dev, &match, child, KOMEDA_OF_PORT_OUTPUT, 0);
 113                 komeda_add_slave(dev, &match, child, KOMEDA_OF_PORT_OUTPUT, 1);
 114         }
 115 
 116         return component_master_add_with_match(dev, &komeda_master_ops, match);
 117 }
 118 
 119 static int komeda_platform_remove(struct platform_device *pdev)
 120 {
 121         component_master_del(&pdev->dev, &komeda_master_ops);
 122         return 0;
 123 }
 124 
 125 static const struct komeda_product_data komeda_products[] = {
 126         [MALI_D71] = {
 127                 .product_id = MALIDP_D71_PRODUCT_ID,
 128                 .identify = d71_identify,
 129         },
 130 };
 131 
 132 static const struct of_device_id komeda_of_match[] = {
 133         { .compatible = "arm,mali-d71", .data = &komeda_products[MALI_D71], },
 134         {},
 135 };
 136 
 137 MODULE_DEVICE_TABLE(of, komeda_of_match);
 138 
 139 static struct platform_driver komeda_platform_driver = {
 140         .probe  = komeda_platform_probe,
 141         .remove = komeda_platform_remove,
 142         .driver = {
 143                 .name = "komeda",
 144                 .of_match_table = komeda_of_match,
 145                 .pm = NULL,
 146         },
 147 };
 148 
 149 module_platform_driver(komeda_platform_driver);
 150 
 151 MODULE_AUTHOR("James.Qian.Wang <james.qian.wang@arm.com>");
 152 MODULE_DESCRIPTION("Komeda KMS driver");
 153 MODULE_LICENSE("GPL v2");