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7#include <linux/module.h>
8#include <linux/kernel.h>
9#include <linux/platform_device.h>
10#include <linux/component.h>
11#include <linux/pm_runtime.h>
12#include <drm/drm_of.h>
13#include "komeda_dev.h"
14#include "komeda_kms.h"
15
16struct komeda_drv {
17 struct komeda_dev *mdev;
18 struct komeda_kms_dev *kms;
19};
20
21struct komeda_dev *dev_to_mdev(struct device *dev)
22{
23 struct komeda_drv *mdrv = dev_get_drvdata(dev);
24
25 return mdrv ? mdrv->mdev : NULL;
26}
27
28static void komeda_unbind(struct device *dev)
29{
30 struct komeda_drv *mdrv = dev_get_drvdata(dev);
31
32 if (!mdrv)
33 return;
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
48static int komeda_bind(struct device *dev)
49{
50 struct komeda_drv *mdrv;
51 int err;
52
53 mdrv = devm_kzalloc(dev, sizeof(*mdrv), GFP_KERNEL);
54 if (!mdrv)
55 return -ENOMEM;
56
57 mdrv->mdev = komeda_dev_create(dev);
58 if (IS_ERR(mdrv->mdev)) {
59 err = PTR_ERR(mdrv->mdev);
60 goto free_mdrv;
61 }
62
63 pm_runtime_enable(dev);
64 if (!pm_runtime_enabled(dev))
65 komeda_dev_resume(mdrv->mdev);
66
67 mdrv->kms = komeda_kms_attach(mdrv->mdev);
68 if (IS_ERR(mdrv->kms)) {
69 err = PTR_ERR(mdrv->kms);
70 goto destroy_mdev;
71 }
72
73 dev_set_drvdata(dev, mdrv);
74
75 return 0;
76
77destroy_mdev:
78 if (pm_runtime_enabled(dev))
79 pm_runtime_disable(dev);
80 else
81 komeda_dev_suspend(mdrv->mdev);
82
83 komeda_dev_destroy(mdrv->mdev);
84
85free_mdrv:
86 devm_kfree(dev, mdrv);
87 return err;
88}
89
90static const struct component_master_ops komeda_master_ops = {
91 .bind = komeda_bind,
92 .unbind = komeda_unbind,
93};
94
95static int compare_of(struct device *dev, void *data)
96{
97 return dev->of_node == data;
98}
99
100static void komeda_add_slave(struct device *master,
101 struct component_match **match,
102 struct device_node *np,
103 u32 port, u32 endpoint)
104{
105 struct device_node *remote;
106
107 remote = of_graph_get_remote_node(np, port, endpoint);
108 if (remote) {
109 drm_of_component_match_add(master, match, compare_of, remote);
110 of_node_put(remote);
111 }
112}
113
114static int komeda_platform_probe(struct platform_device *pdev)
115{
116 struct device *dev = &pdev->dev;
117 struct component_match *match = NULL;
118 struct device_node *child;
119
120 if (!dev->of_node)
121 return -ENODEV;
122
123 for_each_available_child_of_node(dev->of_node, child) {
124 if (of_node_cmp(child->name, "pipeline") != 0)
125 continue;
126
127
128 komeda_add_slave(dev, &match, child, KOMEDA_OF_PORT_OUTPUT, 0);
129 komeda_add_slave(dev, &match, child, KOMEDA_OF_PORT_OUTPUT, 1);
130 }
131
132 return component_master_add_with_match(dev, &komeda_master_ops, match);
133}
134
135static int komeda_platform_remove(struct platform_device *pdev)
136{
137 component_master_del(&pdev->dev, &komeda_master_ops);
138 return 0;
139}
140
141static const struct of_device_id komeda_of_match[] = {
142 { .compatible = "arm,mali-d71", .data = d71_identify, },
143 { .compatible = "arm,mali-d32", .data = d71_identify, },
144 {},
145};
146
147MODULE_DEVICE_TABLE(of, komeda_of_match);
148
149static int __maybe_unused komeda_rt_pm_suspend(struct device *dev)
150{
151 struct komeda_drv *mdrv = dev_get_drvdata(dev);
152
153 return komeda_dev_suspend(mdrv->mdev);
154}
155
156static int __maybe_unused komeda_rt_pm_resume(struct device *dev)
157{
158 struct komeda_drv *mdrv = dev_get_drvdata(dev);
159
160 return komeda_dev_resume(mdrv->mdev);
161}
162
163static int __maybe_unused komeda_pm_suspend(struct device *dev)
164{
165 struct komeda_drv *mdrv = dev_get_drvdata(dev);
166 int res;
167
168 res = drm_mode_config_helper_suspend(&mdrv->kms->base);
169
170 if (!pm_runtime_status_suspended(dev))
171 komeda_dev_suspend(mdrv->mdev);
172
173 return res;
174}
175
176static int __maybe_unused komeda_pm_resume(struct device *dev)
177{
178 struct komeda_drv *mdrv = dev_get_drvdata(dev);
179
180 if (!pm_runtime_status_suspended(dev))
181 komeda_dev_resume(mdrv->mdev);
182
183 return drm_mode_config_helper_resume(&mdrv->kms->base);
184}
185
186static const struct dev_pm_ops komeda_pm_ops = {
187 SET_SYSTEM_SLEEP_PM_OPS(komeda_pm_suspend, komeda_pm_resume)
188 SET_RUNTIME_PM_OPS(komeda_rt_pm_suspend, komeda_rt_pm_resume, NULL)
189};
190
191static struct platform_driver komeda_platform_driver = {
192 .probe = komeda_platform_probe,
193 .remove = komeda_platform_remove,
194 .driver = {
195 .name = "komeda",
196 .of_match_table = komeda_of_match,
197 .pm = &komeda_pm_ops,
198 },
199};
200
201module_platform_driver(komeda_platform_driver);
202
203MODULE_AUTHOR("James.Qian.Wang <james.qian.wang@arm.com>");
204MODULE_DESCRIPTION("Komeda KMS driver");
205MODULE_LICENSE("GPL v2");
206
