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
 16struct dcss_drv {
 17	struct dcss_dev *dcss;
 18	struct dcss_kms_dev *kms;
 19};
 20
 21struct 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
 28struct 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
 35static 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
 75dcss_shutoff:
 76	dcss_dev_destroy(mdrv->dcss);
 77
 78err:
 79	kfree(mdrv);
 80	return err;
 81}
 82
 83static 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
 93static 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
100static 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
112static const struct of_device_id dcss_of_match[] = {
113	{ .compatible = "nxp,imx8mq-dcss", .data = &dcss_types[DCSS_IMX8MQ], },
114	{},
115};
116
117MODULE_DEVICE_TABLE(of, dcss_of_match);
118
119static 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
130drm_module_platform_driver(dcss_platform_driver);
131
132MODULE_AUTHOR("Laurentiu Palcu <laurentiu.palcu@nxp.com>");
133MODULE_DESCRIPTION("DCSS driver for i.MX8MQ");
134MODULE_LICENSE("GPL v2");