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 = 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
73dcss_shutoff:
74	dcss_dev_destroy(mdrv->dcss);
75
76	return err;
77}
78
79static 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
87static 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
94static 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
106static const struct of_device_id dcss_of_match[] = {
107	{ .compatible = "nxp,imx8mq-dcss", .data = &dcss_types[DCSS_IMX8MQ], },
108	{},
109};
110
111MODULE_DEVICE_TABLE(of, dcss_of_match);
112
113static struct platform_driver dcss_platform_driver = {
114	.probe	= dcss_drv_platform_probe,
115	.remove_new = 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
124drm_module_platform_driver(dcss_platform_driver);
125
126MODULE_AUTHOR("Laurentiu Palcu <laurentiu.palcu@nxp.com>");
127MODULE_DESCRIPTION("DCSS driver for i.MX8MQ");
128MODULE_LICENSE("GPL v2");
129