1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * (C) COPYRIGHT 2018 ARM Limited. All rights reserved.
4 * Author: James.Qian.Wang <james.qian.wang@arm.com>
5 *
6 */
7 #include <linux/module.h>
8 #include <linux/kernel.h>
9 #include <linux/of.h>
10 #include <linux/platform_device.h>
11 #include <linux/pm_runtime.h>
12 #include <drm/drm_fbdev_generic.h>
13 #include <drm/drm_module.h>
14 #include <drm/drm_of.h>
15 #include "komeda_dev.h"
16 #include "komeda_kms.h"
17
18 struct komeda_drv {
19 struct komeda_dev *mdev;
20 struct komeda_kms_dev *kms;
21 };
22
dev_to_mdev(struct device * dev)23 struct komeda_dev *dev_to_mdev(struct device *dev)
24 {
25 struct komeda_drv *mdrv = dev_get_drvdata(dev);
26
27 return mdrv ? mdrv->mdev : NULL;
28 }
29
komeda_platform_remove(struct platform_device * pdev)30 static void komeda_platform_remove(struct platform_device *pdev)
31 {
32 struct device *dev = &pdev->dev;
33 struct komeda_drv *mdrv = dev_get_drvdata(dev);
34
35 komeda_kms_detach(mdrv->kms);
36
37 if (pm_runtime_enabled(dev))
38 pm_runtime_disable(dev);
39 else
40 komeda_dev_suspend(mdrv->mdev);
41
42 komeda_dev_destroy(mdrv->mdev);
43
44 dev_set_drvdata(dev, NULL);
45 devm_kfree(dev, mdrv);
46 }
47
komeda_platform_probe(struct platform_device * pdev)48 static int komeda_platform_probe(struct platform_device *pdev)
49 {
50 struct device *dev = &pdev->dev;
51 struct komeda_drv *mdrv;
52 int err;
53
54 mdrv = devm_kzalloc(dev, sizeof(*mdrv), GFP_KERNEL);
55 if (!mdrv)
56 return -ENOMEM;
57
58 mdrv->mdev = komeda_dev_create(dev);
59 if (IS_ERR(mdrv->mdev)) {
60 err = PTR_ERR(mdrv->mdev);
61 goto free_mdrv;
62 }
63
64 pm_runtime_enable(dev);
65 if (!pm_runtime_enabled(dev))
66 komeda_dev_resume(mdrv->mdev);
67
68 mdrv->kms = komeda_kms_attach(mdrv->mdev);
69 if (IS_ERR(mdrv->kms)) {
70 err = PTR_ERR(mdrv->kms);
71 goto destroy_mdev;
72 }
73
74 dev_set_drvdata(dev, mdrv);
75 drm_fbdev_generic_setup(&mdrv->kms->base, 32);
76
77 return 0;
78
79 destroy_mdev:
80 if (pm_runtime_enabled(dev))
81 pm_runtime_disable(dev);
82 else
83 komeda_dev_suspend(mdrv->mdev);
84
85 komeda_dev_destroy(mdrv->mdev);
86
87 free_mdrv:
88 devm_kfree(dev, mdrv);
89 return err;
90 }
91
92 static const struct of_device_id komeda_of_match[] = {
93 { .compatible = "arm,mali-d71", .data = d71_identify, },
94 { .compatible = "arm,mali-d32", .data = d71_identify, },
95 {},
96 };
97
98 MODULE_DEVICE_TABLE(of, komeda_of_match);
99
komeda_rt_pm_suspend(struct device * dev)100 static int __maybe_unused komeda_rt_pm_suspend(struct device *dev)
101 {
102 struct komeda_drv *mdrv = dev_get_drvdata(dev);
103
104 return komeda_dev_suspend(mdrv->mdev);
105 }
106
komeda_rt_pm_resume(struct device * dev)107 static int __maybe_unused komeda_rt_pm_resume(struct device *dev)
108 {
109 struct komeda_drv *mdrv = dev_get_drvdata(dev);
110
111 return komeda_dev_resume(mdrv->mdev);
112 }
113
komeda_pm_suspend(struct device * dev)114 static int __maybe_unused komeda_pm_suspend(struct device *dev)
115 {
116 struct komeda_drv *mdrv = dev_get_drvdata(dev);
117 int res;
118
119 res = drm_mode_config_helper_suspend(&mdrv->kms->base);
120
121 if (!pm_runtime_status_suspended(dev))
122 komeda_dev_suspend(mdrv->mdev);
123
124 return res;
125 }
126
komeda_pm_resume(struct device * dev)127 static int __maybe_unused komeda_pm_resume(struct device *dev)
128 {
129 struct komeda_drv *mdrv = dev_get_drvdata(dev);
130
131 if (!pm_runtime_status_suspended(dev))
132 komeda_dev_resume(mdrv->mdev);
133
134 return drm_mode_config_helper_resume(&mdrv->kms->base);
135 }
136
137 static const struct dev_pm_ops komeda_pm_ops = {
138 SET_SYSTEM_SLEEP_PM_OPS(komeda_pm_suspend, komeda_pm_resume)
139 SET_RUNTIME_PM_OPS(komeda_rt_pm_suspend, komeda_rt_pm_resume, NULL)
140 };
141
142 static struct platform_driver komeda_platform_driver = {
143 .probe = komeda_platform_probe,
144 .remove_new = komeda_platform_remove,
145 .driver = {
146 .name = "komeda",
147 .of_match_table = komeda_of_match,
148 .pm = &komeda_pm_ops,
149 },
150 };
151
152 drm_module_platform_driver(komeda_platform_driver);
153
154 MODULE_AUTHOR("James.Qian.Wang <james.qian.wang@arm.com>");
155 MODULE_DESCRIPTION("Komeda KMS driver");
156 MODULE_LICENSE("GPL v2");
157