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
 14struct dcss_drv {
 15	struct dcss_dev *dcss;
 16	struct dcss_kms_dev *kms;
 17};
 18
 19struct 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
 26struct 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
 33static 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
 72dcss_shutoff:
 73	dcss_dev_destroy(mdrv->dcss);
 74
 75	dev_set_drvdata(dev, NULL);
 76
 77err:
 78	kfree(mdrv);
 79	return err;
 80}
 81
 82static 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
 99static 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
111static const struct of_device_id dcss_of_match[] = {
112	{ .compatible = "nxp,imx8mq-dcss", .data = &dcss_types[DCSS_IMX8MQ], },
113	{},
114};
115
116MODULE_DEVICE_TABLE(of, dcss_of_match);
117
118static 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
124static 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
134module_platform_driver(dcss_platform_driver);
135
136MODULE_AUTHOR("Laurentiu Palcu <laurentiu.palcu@nxp.com>");
137MODULE_DESCRIPTION("DCSS driver for i.MX8MQ");
138MODULE_LICENSE("GPL v2");