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 
14 struct dcss_drv {
15 	struct dcss_dev *dcss;
16 	struct dcss_kms_dev *kms;
17 };
18 
dcss_drv_dev_to_dcss(struct device * dev)19 struct 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 
dcss_drv_dev_to_drm(struct device * dev)26 struct 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 
dcss_drv_platform_probe(struct platform_device * pdev)33 static 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 
72 dcss_shutoff:
73 	dcss_dev_destroy(mdrv->dcss);
74 
75 	dev_set_drvdata(dev, NULL);
76 
77 err:
78 	kfree(mdrv);
79 	return err;
80 }
81 
dcss_drv_platform_remove(struct platform_device * pdev)82 static 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 
99 static 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 
111 static const struct of_device_id dcss_of_match[] = {
112 	{ .compatible = "nxp,imx8mq-dcss", .data = &dcss_types[DCSS_IMX8MQ], },
113 	{},
114 };
115 
116 MODULE_DEVICE_TABLE(of, dcss_of_match);
117 
118 static 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 
124 static 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 
134 module_platform_driver(dcss_platform_driver);
135 
136 MODULE_AUTHOR("Laurentiu Palcu <laurentiu.palcu@nxp.com>");
137 MODULE_DESCRIPTION("DCSS driver for i.MX8MQ");
138 MODULE_LICENSE("GPL v2");
139