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_module.h>
10 #include <drm/drm_of.h>
11
12 #include "dcss-dev.h"
13 #include "dcss-kms.h"
14
15 struct dcss_drv {
16 struct dcss_dev *dcss;
17 struct dcss_kms_dev *kms;
18 };
19
dcss_drv_dev_to_dcss(struct device * dev)20 struct dcss_dev *dcss_drv_dev_to_dcss(struct device *dev)
21 {
22 struct dcss_drv *mdrv = dev_get_drvdata(dev);
23
24 return mdrv ? mdrv->dcss : NULL;
25 }
26
dcss_drv_dev_to_drm(struct device * dev)27 struct drm_device *dcss_drv_dev_to_drm(struct device *dev)
28 {
29 struct dcss_drv *mdrv = dev_get_drvdata(dev);
30
31 return mdrv ? &mdrv->kms->base : NULL;
32 }
33
dcss_drv_platform_probe(struct platform_device * pdev)34 static int dcss_drv_platform_probe(struct platform_device *pdev)
35 {
36 struct device *dev = &pdev->dev;
37 struct device_node *remote;
38 struct dcss_drv *mdrv;
39 int err = 0;
40 bool hdmi_output = true;
41
42 if (!dev->of_node)
43 return -ENODEV;
44
45 remote = of_graph_get_remote_node(dev->of_node, 0, 0);
46 if (!remote)
47 return -ENODEV;
48
49 hdmi_output = !of_device_is_compatible(remote, "fsl,imx8mq-nwl-dsi");
50
51 of_node_put(remote);
52
53 mdrv = kzalloc(sizeof(*mdrv), GFP_KERNEL);
54 if (!mdrv)
55 return -ENOMEM;
56
57 mdrv->dcss = dcss_dev_create(dev, hdmi_output);
58 if (IS_ERR(mdrv->dcss)) {
59 err = PTR_ERR(mdrv->dcss);
60 goto err;
61 }
62
63 dev_set_drvdata(dev, mdrv);
64
65 mdrv->kms = dcss_kms_attach(mdrv->dcss);
66 if (IS_ERR(mdrv->kms)) {
67 err = PTR_ERR(mdrv->kms);
68 goto dcss_shutoff;
69 }
70
71 return 0;
72
73 dcss_shutoff:
74 dcss_dev_destroy(mdrv->dcss);
75
76 dev_set_drvdata(dev, NULL);
77
78 err:
79 kfree(mdrv);
80 return err;
81 }
82
dcss_drv_platform_remove(struct platform_device * pdev)83 static int dcss_drv_platform_remove(struct platform_device *pdev)
84 {
85 struct dcss_drv *mdrv = dev_get_drvdata(&pdev->dev);
86
87 if (!mdrv)
88 return 0;
89
90 dcss_kms_detach(mdrv->kms);
91 dcss_dev_destroy(mdrv->dcss);
92
93 dev_set_drvdata(&pdev->dev, NULL);
94
95 kfree(mdrv);
96
97 return 0;
98 }
99
100 static 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
112 static const struct of_device_id dcss_of_match[] = {
113 { .compatible = "nxp,imx8mq-dcss", .data = &dcss_types[DCSS_IMX8MQ], },
114 {},
115 };
116
117 MODULE_DEVICE_TABLE(of, dcss_of_match);
118
119 static const struct dev_pm_ops dcss_dev_pm = {
120 SET_SYSTEM_SLEEP_PM_OPS(dcss_dev_suspend, dcss_dev_resume)
121 SET_RUNTIME_PM_OPS(dcss_dev_runtime_suspend,
122 dcss_dev_runtime_resume, NULL)
123 };
124
125 static struct platform_driver dcss_platform_driver = {
126 .probe = dcss_drv_platform_probe,
127 .remove = dcss_drv_platform_remove,
128 .driver = {
129 .name = "imx-dcss",
130 .of_match_table = dcss_of_match,
131 .pm = &dcss_dev_pm,
132 },
133 };
134
135 drm_module_platform_driver(dcss_platform_driver);
136
137 MODULE_AUTHOR("Laurentiu Palcu <laurentiu.palcu@nxp.com>");
138 MODULE_DESCRIPTION("DCSS driver for i.MX8MQ");
139 MODULE_LICENSE("GPL v2");
140