drivers/gpu/drm/imx/dcss/dcss-drv.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Copyright 2019 NXP.
   4  */
   5
   6 #include <linux/module.h>
   7 #include <linux/kernel.h>
   8 #include <linux/platform_device.h>
   9 #include <drm/drm_module.h>
  10 #include <drm/drm_of.h>
  11
  12 #include "dcss-dev.h"
  13 #include "dcss-kms.h"
  14
  15 struct dcss_drv {
  16         struct dcss_dev *dcss;
  17         struct dcss_kms_dev *kms;
  18 };
  19
  20 struct dcss_dev *dcss_drv_dev_to_dcss(struct device *dev)
  21 {
  22         struct dcss_drv *mdrv = dev_get_drvdata(dev);
  23
  24         return mdrv ? mdrv->dcss : NULL;
  25 }
  26
  27 struct drm_device *dcss_drv_dev_to_drm(struct device *dev)
  28 {
  29         struct dcss_drv *mdrv = dev_get_drvdata(dev);
  30
  31         return mdrv ? &mdrv->kms->base : NULL;
  32 }
  33
  34 static int dcss_drv_platform_probe(struct platform_device *pdev)
  35 {
  36         struct device *dev = &pdev->dev;
  37         struct device_node *remote;
  38         struct dcss_drv *mdrv;
  39         int err = 0;
  40         bool hdmi_output = true;
  41
  42         if (!dev->of_node)
  43                 return -ENODEV;
  44
  45         remote = of_graph_get_remote_node(dev->of_node, 0, 0);
  46         if (!remote)
  47                 return -ENODEV;
  48
  49         hdmi_output = !of_device_is_compatible(remote, "fsl,imx8mq-nwl-dsi");
  50
  51         of_node_put(remote);
  52
  53         mdrv = kzalloc(sizeof(*mdrv), GFP_KERNEL);
  54         if (!mdrv)
  55                 return -ENOMEM;
  56
  57         mdrv->dcss = dcss_dev_create(dev, hdmi_output);
  58         if (IS_ERR(mdrv->dcss)) {
  59                 err = PTR_ERR(mdrv->dcss);
  60                 goto err;
  61         }
  62
  63         dev_set_drvdata(dev, mdrv);
  64
  65         mdrv->kms = dcss_kms_attach(mdrv->dcss);
  66         if (IS_ERR(mdrv->kms)) {
  67                 err = PTR_ERR(mdrv->kms);
  68                 goto dcss_shutoff;
  69         }
  70
  71         return 0;
  72
  73 dcss_shutoff:
  74         dcss_dev_destroy(mdrv->dcss);
  75
  76         dev_set_drvdata(dev, NULL);
  77
  78 err:
  79         kfree(mdrv);
  80         return err;
  81 }
  82
  83 static int dcss_drv_platform_remove(struct platform_device *pdev)
  84 {
  85         struct dcss_drv *mdrv = dev_get_drvdata(&pdev->dev);
  86
  87         if (!mdrv)
  88                 return 0;
  89
  90         dcss_kms_detach(mdrv->kms);
  91         dcss_dev_destroy(mdrv->dcss);
  92
  93         dev_set_drvdata(&pdev->dev, NULL);
  94
  95         kfree(mdrv);
  96
  97         return 0;
  98 }
  99
 100 static struct dcss_type_data dcss_types[] = {
 101         [DCSS_IMX8MQ] = {
 102                 .name = "DCSS_IMX8MQ",
 103                 .blkctl_ofs = 0x2F000,
 104                 .ctxld_ofs = 0x23000,
 105                 .dtg_ofs = 0x20000,
 106                 .scaler_ofs = 0x1C000,
 107                 .ss_ofs = 0x1B000,
 108                 .dpr_ofs = 0x18000,
 109         },
 110 };
 111
 112 static const struct of_device_id dcss_of_match[] = {
 113         { .compatible = "nxp,imx8mq-dcss", .data = &dcss_types[DCSS_IMX8MQ], },
 114         {},
 115 };
 116
 117 MODULE_DEVICE_TABLE(of, dcss_of_match);
 118
 119 static const struct dev_pm_ops dcss_dev_pm = {
 120         SET_SYSTEM_SLEEP_PM_OPS(dcss_dev_suspend, dcss_dev_resume)
 121         SET_RUNTIME_PM_OPS(dcss_dev_runtime_suspend,
 122                            dcss_dev_runtime_resume, NULL)
 123 };
 124
 125 static struct platform_driver dcss_platform_driver = {
 126         .probe  = dcss_drv_platform_probe,
 127         .remove = dcss_drv_platform_remove,
 128         .driver = {
 129                 .name = "imx-dcss",
 130                 .of_match_table = dcss_of_match,
 131                 .pm = &dcss_dev_pm,
 132         },
 133 };
 134
 135 drm_module_platform_driver(dcss_platform_driver);
 136
 137 MODULE_AUTHOR("Laurentiu Palcu <[email protected]>");
 138 MODULE_DESCRIPTION("DCSS driver for i.MX8MQ");
 139 MODULE_LICENSE("GPL v2");