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