tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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#include <linux/aperture.h>
12
13#include <drm/clients/drm_client_setup.h>
14#include <drm/drm_atomic.h>
15#include <drm/drm_atomic_helper.h>
16#include <drm/drm_crtc.h>
17#include <drm/drm_drv.h>
18#include <drm/drm_fbdev_dma.h>
19#include <drm/drm_gem_dma_helper.h>
20#include <drm/drm_managed.h>
21#include <drm/drm_module.h>
22#include <drm/drm_probe_helper.h>
23
24#include "tidss_dispc.h"
25#include "tidss_drv.h"
26#include "tidss_kms.h"
27#include "tidss_irq.h"
28#include "tidss_oldi.h"
29
30/* Power management */
31
32int tidss_runtime_get(struct tidss_device *tidss)
33{
34 int r;
35
36 r = pm_runtime_resume_and_get(tidss->dev);
37 WARN_ON(r < 0);
38 return r;
39}
40
41void tidss_runtime_put(struct tidss_device *tidss)
42{
43 int r;
44
45 pm_runtime_mark_last_busy(tidss->dev);
46
47 r = pm_runtime_put_autosuspend(tidss->dev);
48 WARN_ON(r < 0);
49}
50
51static int __maybe_unused tidss_pm_runtime_suspend(struct device *dev)
52{
53 struct tidss_device *tidss = dev_get_drvdata(dev);
54
55 return dispc_runtime_suspend(tidss->dispc);
56}
57
58static int __maybe_unused tidss_pm_runtime_resume(struct device *dev)
59{
60 struct tidss_device *tidss = dev_get_drvdata(dev);
61 int r;
62
63 r = dispc_runtime_resume(tidss->dispc);
64 if (r)
65 return r;
66
67 return 0;
68}
69
70static int __maybe_unused tidss_suspend(struct device *dev)
71{
72 struct tidss_device *tidss = dev_get_drvdata(dev);
73
74 return drm_mode_config_helper_suspend(&tidss->ddev);
75}
76
77static int __maybe_unused tidss_resume(struct device *dev)
78{
79 struct tidss_device *tidss = dev_get_drvdata(dev);
80
81 return drm_mode_config_helper_resume(&tidss->ddev);
82}
83
84static __maybe_unused const struct dev_pm_ops tidss_pm_ops = {
85 SET_SYSTEM_SLEEP_PM_OPS(tidss_suspend, tidss_resume)
86 SET_RUNTIME_PM_OPS(tidss_pm_runtime_suspend, tidss_pm_runtime_resume, NULL)
87};
88
89/* DRM device Information */
90
91static void tidss_release(struct drm_device *ddev)
92{
93 drm_kms_helper_poll_fini(ddev);
94}
95
96DEFINE_DRM_GEM_DMA_FOPS(tidss_fops);
97
98static const struct drm_driver tidss_driver = {
99 .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
100 .fops = &tidss_fops,
101 .release = tidss_release,
102 DRM_GEM_DMA_DRIVER_OPS_VMAP,
103 DRM_FBDEV_DMA_DRIVER_OPS,
104 .name = "tidss",
105 .desc = "TI Keystone DSS",
106 .major = 1,
107 .minor = 0,
108};
109
110static int tidss_probe(struct platform_device *pdev)
111{
112 struct device *dev = &pdev->dev;
113 struct tidss_device *tidss;
114 struct drm_device *ddev;
115 int ret;
116 int irq;
117
118 tidss = devm_drm_dev_alloc(&pdev->dev, &tidss_driver,
119 struct tidss_device, ddev);
120 if (IS_ERR(tidss))
121 return PTR_ERR(tidss);
122
123 ddev = &tidss->ddev;
124
125 tidss->dev = dev;
126 tidss->feat = of_device_get_match_data(dev);
127
128 platform_set_drvdata(pdev, tidss);
129
130 spin_lock_init(&tidss->irq_lock);
131
132 ret = dispc_init(tidss);
133 if (ret) {
134 dev_err(dev, "failed to initialize dispc: %d\n", ret);
135 return ret;
136 }
137
138 ret = tidss_oldi_init(tidss);
139 if (ret)
140 return dev_err_probe(dev, ret, "failed to init OLDI\n");
141
142 pm_runtime_enable(dev);
143
144 pm_runtime_set_autosuspend_delay(dev, 1000);
145 pm_runtime_use_autosuspend(dev);
146
147#ifndef CONFIG_PM
148 /* If we don't have PM, we need to call resume manually */
149 dispc_runtime_resume(tidss->dispc);
150#endif
151
152 ret = tidss_modeset_init(tidss);
153 if (ret < 0) {
154 if (ret != -EPROBE_DEFER)
155 dev_err(dev, "failed to init DRM/KMS (%d)\n", ret);
156 goto err_runtime_suspend;
157 }
158
159 irq = platform_get_irq(pdev, 0);
160 if (irq < 0) {
161 ret = irq;
162 goto err_runtime_suspend;
163 }
164 tidss->irq = irq;
165
166 ret = tidss_irq_install(ddev, irq);
167 if (ret) {
168 dev_err(dev, "tidss_irq_install failed: %d\n", ret);
169 goto err_runtime_suspend;
170 }
171
172 drm_kms_helper_poll_init(ddev);
173
174 drm_mode_config_reset(ddev);
175
176 ret = drm_dev_register(ddev, 0);
177 if (ret) {
178 dev_err(dev, "failed to register DRM device\n");
179 goto err_irq_uninstall;
180 }
181
182 /* Remove possible early fb before setting up the fbdev */
183 ret = aperture_remove_all_conflicting_devices(tidss_driver.name);
184 if (ret)
185 goto err_drm_dev_unreg;
186
187 drm_client_setup(ddev, NULL);
188
189 dev_dbg(dev, "%s done\n", __func__);
190
191 return 0;
192
193err_drm_dev_unreg:
194 drm_dev_unregister(ddev);
195
196err_irq_uninstall:
197 tidss_irq_uninstall(ddev);
198
199err_runtime_suspend:
200#ifndef CONFIG_PM
201 dispc_runtime_suspend(tidss->dispc);
202#endif
203 pm_runtime_dont_use_autosuspend(dev);
204 pm_runtime_disable(dev);
205
206 tidss_oldi_deinit(tidss);
207
208 return ret;
209}
210
211static void tidss_remove(struct platform_device *pdev)
212{
213 struct device *dev = &pdev->dev;
214 struct tidss_device *tidss = platform_get_drvdata(pdev);
215 struct drm_device *ddev = &tidss->ddev;
216
217 drm_dev_unregister(ddev);
218
219 drm_atomic_helper_shutdown(ddev);
220
221 tidss_irq_uninstall(ddev);
222
223#ifndef CONFIG_PM
224 /* If we don't have PM, we need to call suspend manually */
225 dispc_runtime_suspend(tidss->dispc);
226#endif
227 pm_runtime_dont_use_autosuspend(dev);
228 pm_runtime_disable(dev);
229
230 tidss_oldi_deinit(tidss);
231
232 /* devm allocated dispc goes away with the dev so mark it NULL */
233 dispc_remove(tidss);
234
235 dev_dbg(dev, "%s done\n", __func__);
236}
237
238static void tidss_shutdown(struct platform_device *pdev)
239{
240 drm_atomic_helper_shutdown(platform_get_drvdata(pdev));
241}
242
243static const struct of_device_id tidss_of_table[] = {
244 { .compatible = "ti,k2g-dss", .data = &dispc_k2g_feats, },
245 { .compatible = "ti,am625-dss", .data = &dispc_am625_feats, },
246 { .compatible = "ti,am62a7-dss", .data = &dispc_am62a7_feats, },
247 { .compatible = "ti,am62l-dss", .data = &dispc_am62l_feats, },
248 { .compatible = "ti,am65x-dss", .data = &dispc_am65x_feats, },
249 { .compatible = "ti,j721e-dss", .data = &dispc_j721e_feats, },
250 { }
251};
252
253MODULE_DEVICE_TABLE(of, tidss_of_table);
254
255static struct platform_driver tidss_platform_driver = {
256 .probe = tidss_probe,
257 .remove = tidss_remove,
258 .shutdown = tidss_shutdown,
259 .driver = {
260 .name = "tidss",
261 .pm = pm_ptr(&tidss_pm_ops),
262 .of_match_table = tidss_of_table,
263 .suppress_bind_attrs = true,
264 },
265};
266
267drm_module_platform_driver(tidss_platform_driver);
268
269MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@ti.com>");
270MODULE_DESCRIPTION("TI Keystone DSS Driver");
271MODULE_LICENSE("GPL v2");