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_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		/* add connector */
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");