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/platform_device.h>
10 #include <linux/component.h>
11 #include <linux/pm_runtime.h>
12 #include <drm/drm_fb_helper.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_unbind(struct device * dev)30 static void komeda_unbind(struct device *dev)
31 {
32 struct komeda_drv *mdrv = dev_get_drvdata(dev);
33
34 if (!mdrv)
35 return;
36
37 komeda_kms_detach(mdrv->kms);
38
39 if (pm_runtime_enabled(dev))
40 pm_runtime_disable(dev);
41 else
42 komeda_dev_suspend(mdrv->mdev);
43
44 komeda_dev_destroy(mdrv->mdev);
45
46 dev_set_drvdata(dev, NULL);
47 devm_kfree(dev, mdrv);
48 }
49
komeda_bind(struct device * dev)50 static int komeda_bind(struct device *dev)
51 {
52 struct komeda_drv *mdrv;
53 int err;
54
55 mdrv = devm_kzalloc(dev, sizeof(*mdrv), GFP_KERNEL);
56 if (!mdrv)
57 return -ENOMEM;
58
59 mdrv->mdev = komeda_dev_create(dev);
60 if (IS_ERR(mdrv->mdev)) {
61 err = PTR_ERR(mdrv->mdev);
62 goto free_mdrv;
63 }
64
65 pm_runtime_enable(dev);
66 if (!pm_runtime_enabled(dev))
67 komeda_dev_resume(mdrv->mdev);
68
69 mdrv->kms = komeda_kms_attach(mdrv->mdev);
70 if (IS_ERR(mdrv->kms)) {
71 err = PTR_ERR(mdrv->kms);
72 goto destroy_mdev;
73 }
74
75 dev_set_drvdata(dev, mdrv);
76 drm_fbdev_generic_setup(&mdrv->kms->base, 32);
77
78 return 0;
79
80 destroy_mdev:
81 if (pm_runtime_enabled(dev))
82 pm_runtime_disable(dev);
83 else
84 komeda_dev_suspend(mdrv->mdev);
85
86 komeda_dev_destroy(mdrv->mdev);
87
88 free_mdrv:
89 devm_kfree(dev, mdrv);
90 return err;
91 }
92
93 static const struct component_master_ops komeda_master_ops = {
94 .bind = komeda_bind,
95 .unbind = komeda_unbind,
96 };
97
komeda_add_slave(struct device * master,struct component_match ** match,struct device_node * np,u32 port,u32 endpoint)98 static void komeda_add_slave(struct device *master,
99 struct component_match **match,
100 struct device_node *np,
101 u32 port, u32 endpoint)
102 {
103 struct device_node *remote;
104
105 remote = of_graph_get_remote_node(np, port, endpoint);
106 if (remote) {
107 drm_of_component_match_add(master, match, component_compare_of, remote);
108 of_node_put(remote);
109 }
110 }
111
komeda_platform_probe(struct platform_device * pdev)112 static int komeda_platform_probe(struct platform_device *pdev)
113 {
114 struct device *dev = &pdev->dev;
115 struct component_match *match = NULL;
116 struct device_node *child;
117
118 if (!dev->of_node)
119 return -ENODEV;
120
121 for_each_available_child_of_node(dev->of_node, child) {
122 if (of_node_cmp(child->name, "pipeline") != 0)
123 continue;
124
125 /* add connector */
126 komeda_add_slave(dev, &match, child, KOMEDA_OF_PORT_OUTPUT, 0);
127 komeda_add_slave(dev, &match, child, KOMEDA_OF_PORT_OUTPUT, 1);
128 }
129
130 return component_master_add_with_match(dev, &komeda_master_ops, match);
131 }
132
komeda_platform_remove(struct platform_device * pdev)133 static int komeda_platform_remove(struct platform_device *pdev)
134 {
135 component_master_del(&pdev->dev, &komeda_master_ops);
136 return 0;
137 }
138
139 static const struct of_device_id komeda_of_match[] = {
140 { .compatible = "arm,mali-d71", .data = d71_identify, },
141 { .compatible = "arm,mali-d32", .data = d71_identify, },
142 {},
143 };
144
145 MODULE_DEVICE_TABLE(of, komeda_of_match);
146
komeda_rt_pm_suspend(struct device * dev)147 static int __maybe_unused komeda_rt_pm_suspend(struct device *dev)
148 {
149 struct komeda_drv *mdrv = dev_get_drvdata(dev);
150
151 return komeda_dev_suspend(mdrv->mdev);
152 }
153
komeda_rt_pm_resume(struct device * dev)154 static int __maybe_unused komeda_rt_pm_resume(struct device *dev)
155 {
156 struct komeda_drv *mdrv = dev_get_drvdata(dev);
157
158 return komeda_dev_resume(mdrv->mdev);
159 }
160
komeda_pm_suspend(struct device * dev)161 static int __maybe_unused komeda_pm_suspend(struct device *dev)
162 {
163 struct komeda_drv *mdrv = dev_get_drvdata(dev);
164 int res;
165
166 res = drm_mode_config_helper_suspend(&mdrv->kms->base);
167
168 if (!pm_runtime_status_suspended(dev))
169 komeda_dev_suspend(mdrv->mdev);
170
171 return res;
172 }
173
komeda_pm_resume(struct device * dev)174 static int __maybe_unused komeda_pm_resume(struct device *dev)
175 {
176 struct komeda_drv *mdrv = dev_get_drvdata(dev);
177
178 if (!pm_runtime_status_suspended(dev))
179 komeda_dev_resume(mdrv->mdev);
180
181 return drm_mode_config_helper_resume(&mdrv->kms->base);
182 }
183
184 static const struct dev_pm_ops komeda_pm_ops = {
185 SET_SYSTEM_SLEEP_PM_OPS(komeda_pm_suspend, komeda_pm_resume)
186 SET_RUNTIME_PM_OPS(komeda_rt_pm_suspend, komeda_rt_pm_resume, NULL)
187 };
188
189 static struct platform_driver komeda_platform_driver = {
190 .probe = komeda_platform_probe,
191 .remove = komeda_platform_remove,
192 .driver = {
193 .name = "komeda",
194 .of_match_table = komeda_of_match,
195 .pm = &komeda_pm_ops,
196 },
197 };
198
199 drm_module_platform_driver(komeda_platform_driver);
200
201 MODULE_AUTHOR("James.Qian.Wang <james.qian.wang@arm.com>");
202 MODULE_DESCRIPTION("Komeda KMS driver");
203 MODULE_LICENSE("GPL v2");
204
