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 = kzalloc(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                 err = PTR_ERR(mdrv->dcss);
  61                 goto err;
  62         }
  63
  64         dev_set_drvdata(dev, mdrv);
  65
  66         mdrv->kms = dcss_kms_attach(mdrv->dcss);
  67         if (IS_ERR(mdrv->kms)) {
  68                 err = PTR_ERR(mdrv->kms);
  69                 dev_err_probe(dev, err, "Failed to initialize KMS\n");
  70                 goto dcss_shutoff;
  71         }
  72
  73         return 0;
  74
  75 dcss_shutoff:
  76         dcss_dev_destroy(mdrv->dcss);
  77
  78 err:
  79         kfree(mdrv);
  80         return err;
  81 }
  82
  83 static void dcss_drv_platform_remove(struct platform_device *pdev)
  84 {
  85         struct dcss_drv *mdrv = dev_get_drvdata(&pdev->dev);
  86
  87         dcss_kms_detach(mdrv->kms);
  88         dcss_dev_destroy(mdrv->dcss);
  89
  90         kfree(mdrv);
  91 }
  92
  93 static void dcss_drv_platform_shutdown(struct platform_device *pdev)
  94 {
  95         struct dcss_drv *mdrv = dev_get_drvdata(&pdev->dev);
  96
  97         dcss_kms_shutdown(mdrv->kms);
  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 struct platform_driver dcss_platform_driver = {
 120         .probe  = dcss_drv_platform_probe,
 121         .remove_new = dcss_drv_platform_remove,
 122         .shutdown = dcss_drv_platform_shutdown,
 123         .driver = {
 124                 .name = "imx-dcss",
 125                 .of_match_table = dcss_of_match,
 126                 .pm = pm_ptr(&dcss_dev_pm_ops),
 127         },
 128 };
 129
 130 drm_module_platform_driver(dcss_platform_driver);
 131
 132 MODULE_AUTHOR("Laurentiu Palcu <[email protected]>");
 133 MODULE_DESCRIPTION("DCSS driver for i.MX8MQ");
 134 MODULE_LICENSE("GPL v2");