1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (C) 2018 Texas Instruments Incorporated - https://www.ti.com/
4 * Author: Tomi Valkeinen <tomi.valkeinen@ti.com>
5 */
6
7#include <linux/console.h>
8#include <linux/of.h>
9#include <linux/module.h>
10#include <linux/pm_runtime.h>
11
12#include <drm/drm_atomic.h>
13#include <drm/drm_atomic_helper.h>
14#include <drm/drm_crtc.h>
15#include <drm/drm_drv.h>
16#include <drm/drm_fbdev_dma.h>
17#include <drm/drm_gem_dma_helper.h>
18#include <drm/drm_managed.h>
19#include <drm/drm_module.h>
20#include <drm/drm_probe_helper.h>
21
22#include "tidss_dispc.h"
23#include "tidss_drv.h"
24#include "tidss_kms.h"
25#include "tidss_irq.h"
26
27/* Power management */
28
29int tidss_runtime_get(struct tidss_device *tidss)
30{
31	int r;
32
33	dev_dbg(tidss->dev, "%s\n", __func__);
34
35	r = pm_runtime_resume_and_get(tidss->dev);
36	WARN_ON(r < 0);
37	return r;
38}
39
40void tidss_runtime_put(struct tidss_device *tidss)
41{
42	int r;
43
44	dev_dbg(tidss->dev, "%s\n", __func__);
45
46	pm_runtime_mark_last_busy(tidss->dev);
47
48	r = pm_runtime_put_autosuspend(tidss->dev);
49	WARN_ON(r < 0);
50}
51
52static int __maybe_unused tidss_pm_runtime_suspend(struct device *dev)
53{
54	struct tidss_device *tidss = dev_get_drvdata(dev);
55
56	dev_dbg(dev, "%s\n", __func__);
57
58	return dispc_runtime_suspend(tidss->dispc);
59}
60
61static int __maybe_unused tidss_pm_runtime_resume(struct device *dev)
62{
63	struct tidss_device *tidss = dev_get_drvdata(dev);
64	int r;
65
66	dev_dbg(dev, "%s\n", __func__);
67
68	r = dispc_runtime_resume(tidss->dispc);
69	if (r)
70		return r;
71
72	return 0;
73}
74
75static int __maybe_unused tidss_suspend(struct device *dev)
76{
77	struct tidss_device *tidss = dev_get_drvdata(dev);
78
79	dev_dbg(dev, "%s\n", __func__);
80
81	return drm_mode_config_helper_suspend(&tidss->ddev);
82}
83
84static int __maybe_unused tidss_resume(struct device *dev)
85{
86	struct tidss_device *tidss = dev_get_drvdata(dev);
87
88	dev_dbg(dev, "%s\n", __func__);
89
90	return drm_mode_config_helper_resume(&tidss->ddev);
91}
92
93static __maybe_unused const struct dev_pm_ops tidss_pm_ops = {
94	SET_SYSTEM_SLEEP_PM_OPS(tidss_suspend, tidss_resume)
95	SET_RUNTIME_PM_OPS(tidss_pm_runtime_suspend, tidss_pm_runtime_resume, NULL)
96};
97
98/* DRM device Information */
99
100static void tidss_release(struct drm_device *ddev)
101{
102	drm_kms_helper_poll_fini(ddev);
103}
104
105DEFINE_DRM_GEM_DMA_FOPS(tidss_fops);
106
107static const struct drm_driver tidss_driver = {
108	.driver_features	= DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
109	.fops			= &tidss_fops,
110	.release		= tidss_release,
111	DRM_GEM_DMA_DRIVER_OPS_VMAP,
112	.name			= "tidss",
113	.desc			= "TI Keystone DSS",
114	.date			= "20180215",
115	.major			= 1,
116	.minor			= 0,
117};
118
119static int tidss_probe(struct platform_device *pdev)
120{
121	struct device *dev = &pdev->dev;
122	struct tidss_device *tidss;
123	struct drm_device *ddev;
124	int ret;
125	int irq;
126
127	dev_dbg(dev, "%s\n", __func__);
128
129	tidss = devm_drm_dev_alloc(&pdev->dev, &tidss_driver,
130				   struct tidss_device, ddev);
131	if (IS_ERR(tidss))
132		return PTR_ERR(tidss);
133
134	ddev = &tidss->ddev;
135
136	tidss->dev = dev;
137	tidss->feat = of_device_get_match_data(dev);
138
139	platform_set_drvdata(pdev, tidss);
140
141	spin_lock_init(&tidss->wait_lock);
142
143	ret = dispc_init(tidss);
144	if (ret) {
145		dev_err(dev, "failed to initialize dispc: %d\n", ret);
146		return ret;
147	}
148
149	pm_runtime_enable(dev);
150
151	pm_runtime_set_autosuspend_delay(dev, 1000);
152	pm_runtime_use_autosuspend(dev);
153
154#ifndef CONFIG_PM
155	/* If we don't have PM, we need to call resume manually */
156	dispc_runtime_resume(tidss->dispc);
157#endif
158
159	ret = tidss_modeset_init(tidss);
160	if (ret < 0) {
161		if (ret != -EPROBE_DEFER)
162			dev_err(dev, "failed to init DRM/KMS (%d)\n", ret);
163		goto err_runtime_suspend;
164	}
165
166	irq = platform_get_irq(pdev, 0);
167	if (irq < 0) {
168		ret = irq;
169		goto err_runtime_suspend;
170	}
171	tidss->irq = irq;
172
173	ret = tidss_irq_install(ddev, irq);
174	if (ret) {
175		dev_err(dev, "tidss_irq_install failed: %d\n", ret);
176		goto err_runtime_suspend;
177	}
178
179	drm_kms_helper_poll_init(ddev);
180
181	drm_mode_config_reset(ddev);
182
183	ret = drm_dev_register(ddev, 0);
184	if (ret) {
185		dev_err(dev, "failed to register DRM device\n");
186		goto err_irq_uninstall;
187	}
188
189	drm_fbdev_dma_setup(ddev, 32);
190
191	dev_dbg(dev, "%s done\n", __func__);
192
193	return 0;
194
195err_irq_uninstall:
196	tidss_irq_uninstall(ddev);
197
198err_runtime_suspend:
199#ifndef CONFIG_PM
200	dispc_runtime_suspend(tidss->dispc);
201#endif
202	pm_runtime_dont_use_autosuspend(dev);
203	pm_runtime_disable(dev);
204
205	return ret;
206}
207
208static void tidss_remove(struct platform_device *pdev)
209{
210	struct device *dev = &pdev->dev;
211	struct tidss_device *tidss = platform_get_drvdata(pdev);
212	struct drm_device *ddev = &tidss->ddev;
213
214	dev_dbg(dev, "%s\n", __func__);
215
216	drm_dev_unregister(ddev);
217
218	drm_atomic_helper_shutdown(ddev);
219
220	tidss_irq_uninstall(ddev);
221
222#ifndef CONFIG_PM
223	/* If we don't have PM, we need to call suspend manually */
224	dispc_runtime_suspend(tidss->dispc);
225#endif
226	pm_runtime_dont_use_autosuspend(dev);
227	pm_runtime_disable(dev);
228
229	/* devm allocated dispc goes away with the dev so mark it NULL */
230	dispc_remove(tidss);
231
232	dev_dbg(dev, "%s done\n", __func__);
233}
234
235static void tidss_shutdown(struct platform_device *pdev)
236{
237	drm_atomic_helper_shutdown(platform_get_drvdata(pdev));
238}
239
240static const struct of_device_id tidss_of_table[] = {
241	{ .compatible = "ti,k2g-dss", .data = &dispc_k2g_feats, },
242	{ .compatible = "ti,am625-dss", .data = &dispc_am625_feats, },
243	{ .compatible = "ti,am62a7-dss", .data = &dispc_am62a7_feats, },
244	{ .compatible = "ti,am65x-dss", .data = &dispc_am65x_feats, },
245	{ .compatible = "ti,j721e-dss", .data = &dispc_j721e_feats, },
246	{ }
247};
248
249MODULE_DEVICE_TABLE(of, tidss_of_table);
250
251static struct platform_driver tidss_platform_driver = {
252	.probe		= tidss_probe,
253	.remove_new	= tidss_remove,
254	.shutdown	= tidss_shutdown,
255	.driver		= {
256		.name	= "tidss",
257		.pm	= pm_ptr(&tidss_pm_ops),
258		.of_match_table = tidss_of_table,
259		.suppress_bind_attrs = true,
260	},
261};
262
263drm_module_platform_driver(tidss_platform_driver);
264
265MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@ti.com>");
266MODULE_DESCRIPTION("TI Keystone DSS Driver");
267MODULE_LICENSE("GPL v2");
268