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		goto dcss_shutoff;
 70	}
 71
 72	return 0;
 73
 74dcss_shutoff:
 75	dcss_dev_destroy(mdrv->dcss);
 76
 77	dev_set_drvdata(dev, NULL);
 78
 79err:
 80	kfree(mdrv);
 81	return err;
 82}
 83
 84static int dcss_drv_platform_remove(struct platform_device *pdev)
 85{
 86	struct dcss_drv *mdrv = dev_get_drvdata(&pdev->dev);
 87
 88	if (!mdrv)
 89		return 0;
 90
 91	dcss_kms_detach(mdrv->kms);
 92	dcss_dev_destroy(mdrv->dcss);
 93
 94	dev_set_drvdata(&pdev->dev, NULL);
 95
 96	kfree(mdrv);
 97
 98	return 0;
 99}
100
101static struct dcss_type_data dcss_types[] = {
102	[DCSS_IMX8MQ] = {
103		.name = "DCSS_IMX8MQ",
104		.blkctl_ofs = 0x2F000,
105		.ctxld_ofs = 0x23000,
106		.dtg_ofs = 0x20000,
107		.scaler_ofs = 0x1C000,
108		.ss_ofs = 0x1B000,
109		.dpr_ofs = 0x18000,
110	},
111};
112
113static const struct of_device_id dcss_of_match[] = {
114	{ .compatible = "nxp,imx8mq-dcss", .data = &dcss_types[DCSS_IMX8MQ], },
115	{},
116};
117
118MODULE_DEVICE_TABLE(of, dcss_of_match);
119
120static const struct dev_pm_ops dcss_dev_pm = {
121	SET_SYSTEM_SLEEP_PM_OPS(dcss_dev_suspend, dcss_dev_resume)
122	SET_RUNTIME_PM_OPS(dcss_dev_runtime_suspend,
123			   dcss_dev_runtime_resume, NULL)
124};
125
126static struct platform_driver dcss_platform_driver = {
127	.probe	= dcss_drv_platform_probe,
128	.remove	= dcss_drv_platform_remove,
129	.driver	= {
130		.name = "imx-dcss",
131		.of_match_table	= dcss_of_match,
132		.pm = &dcss_dev_pm,
133	},
134};
135
136drm_module_platform_driver(dcss_platform_driver);
137
138MODULE_AUTHOR("Laurentiu Palcu <laurentiu.palcu@nxp.com>");
139MODULE_DESCRIPTION("DCSS driver for i.MX8MQ");
140MODULE_LICENSE("GPL v2");