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 
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 
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 
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 
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 
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 
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 
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 
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 
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 
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