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