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/clients/drm_client_setup.h>
13 #include <drm/drm_atomic.h>
14 #include <drm/drm_atomic_helper.h>
15 #include <drm/drm_crtc.h>
16 #include <drm/drm_drv.h>
17 #include <drm/drm_fbdev_dma.h>
18 #include <drm/drm_gem_dma_helper.h>
19 #include <drm/drm_managed.h>
20 #include <drm/drm_module.h>
21 #include <drm/drm_probe_helper.h>
22
23 #include "tidss_dispc.h"
24 #include "tidss_drv.h"
25 #include "tidss_kms.h"
26 #include "tidss_irq.h"
27 #include "tidss_oldi.h"
28
29 /* Power management */
30
tidss_runtime_get(struct tidss_device * tidss)31 int tidss_runtime_get(struct tidss_device *tidss)
32 {
33 int r;
34
35 dev_dbg(tidss->dev, "%s\n", __func__);
36
37 r = pm_runtime_resume_and_get(tidss->dev);
38 WARN_ON(r < 0);
39 return r;
40 }
41
tidss_runtime_put(struct tidss_device * tidss)42 void tidss_runtime_put(struct tidss_device *tidss)
43 {
44 int r;
45
46 dev_dbg(tidss->dev, "%s\n", __func__);
47
48 pm_runtime_mark_last_busy(tidss->dev);
49
50 r = pm_runtime_put_autosuspend(tidss->dev);
51 WARN_ON(r < 0);
52 }
53
tidss_pm_runtime_suspend(struct device * dev)54 static int __maybe_unused tidss_pm_runtime_suspend(struct device *dev)
55 {
56 struct tidss_device *tidss = dev_get_drvdata(dev);
57
58 dev_dbg(dev, "%s\n", __func__);
59
60 return dispc_runtime_suspend(tidss->dispc);
61 }
62
tidss_pm_runtime_resume(struct device * dev)63 static int __maybe_unused tidss_pm_runtime_resume(struct device *dev)
64 {
65 struct tidss_device *tidss = dev_get_drvdata(dev);
66 int r;
67
68 dev_dbg(dev, "%s\n", __func__);
69
70 r = dispc_runtime_resume(tidss->dispc);
71 if (r)
72 return r;
73
74 return 0;
75 }
76
tidss_suspend(struct device * dev)77 static int __maybe_unused tidss_suspend(struct device *dev)
78 {
79 struct tidss_device *tidss = dev_get_drvdata(dev);
80
81 dev_dbg(dev, "%s\n", __func__);
82
83 return drm_mode_config_helper_suspend(&tidss->ddev);
84 }
85
tidss_resume(struct device * dev)86 static int __maybe_unused tidss_resume(struct device *dev)
87 {
88 struct tidss_device *tidss = dev_get_drvdata(dev);
89
90 dev_dbg(dev, "%s\n", __func__);
91
92 return drm_mode_config_helper_resume(&tidss->ddev);
93 }
94
95 static __maybe_unused const struct dev_pm_ops tidss_pm_ops = {
96 SET_SYSTEM_SLEEP_PM_OPS(tidss_suspend, tidss_resume)
97 SET_RUNTIME_PM_OPS(tidss_pm_runtime_suspend, tidss_pm_runtime_resume, NULL)
98 };
99
100 /* DRM device Information */
101
tidss_release(struct drm_device * ddev)102 static void tidss_release(struct drm_device *ddev)
103 {
104 drm_kms_helper_poll_fini(ddev);
105 }
106
107 DEFINE_DRM_GEM_DMA_FOPS(tidss_fops);
108
109 static const struct drm_driver tidss_driver = {
110 .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
111 .fops = &tidss_fops,
112 .release = tidss_release,
113 DRM_GEM_DMA_DRIVER_OPS_VMAP,
114 DRM_FBDEV_DMA_DRIVER_OPS,
115 .name = "tidss",
116 .desc = "TI Keystone DSS",
117 .major = 1,
118 .minor = 0,
119 };
120
tidss_probe(struct platform_device * pdev)121 static int tidss_probe(struct platform_device *pdev)
122 {
123 struct device *dev = &pdev->dev;
124 struct tidss_device *tidss;
125 struct drm_device *ddev;
126 int ret;
127 int irq;
128
129 dev_dbg(dev, "%s\n", __func__);
130
131 tidss = devm_drm_dev_alloc(&pdev->dev, &tidss_driver,
132 struct tidss_device, ddev);
133 if (IS_ERR(tidss))
134 return PTR_ERR(tidss);
135
136 ddev = &tidss->ddev;
137
138 tidss->dev = dev;
139 tidss->feat = of_device_get_match_data(dev);
140
141 platform_set_drvdata(pdev, tidss);
142
143 spin_lock_init(&tidss->irq_lock);
144
145 ret = dispc_init(tidss);
146 if (ret) {
147 dev_err(dev, "failed to initialize dispc: %d\n", ret);
148 return ret;
149 }
150
151 ret = tidss_oldi_init(tidss);
152 if (ret)
153 return dev_err_probe(dev, ret, "failed to init OLDI\n");
154
155 pm_runtime_enable(dev);
156
157 pm_runtime_set_autosuspend_delay(dev, 1000);
158 pm_runtime_use_autosuspend(dev);
159
160 #ifndef CONFIG_PM
161 /* If we don't have PM, we need to call resume manually */
162 dispc_runtime_resume(tidss->dispc);
163 #endif
164
165 ret = tidss_modeset_init(tidss);
166 if (ret < 0) {
167 if (ret != -EPROBE_DEFER)
168 dev_err(dev, "failed to init DRM/KMS (%d)\n", ret);
169 goto err_runtime_suspend;
170 }
171
172 irq = platform_get_irq(pdev, 0);
173 if (irq < 0) {
174 ret = irq;
175 goto err_runtime_suspend;
176 }
177 tidss->irq = irq;
178
179 ret = tidss_irq_install(ddev, irq);
180 if (ret) {
181 dev_err(dev, "tidss_irq_install failed: %d\n", ret);
182 goto err_runtime_suspend;
183 }
184
185 drm_kms_helper_poll_init(ddev);
186
187 drm_mode_config_reset(ddev);
188
189 ret = drm_dev_register(ddev, 0);
190 if (ret) {
191 dev_err(dev, "failed to register DRM device\n");
192 goto err_irq_uninstall;
193 }
194
195 drm_client_setup(ddev, NULL);
196
197 dev_dbg(dev, "%s done\n", __func__);
198
199 return 0;
200
201 err_irq_uninstall:
202 tidss_irq_uninstall(ddev);
203
204 err_runtime_suspend:
205 #ifndef CONFIG_PM
206 dispc_runtime_suspend(tidss->dispc);
207 #endif
208 pm_runtime_dont_use_autosuspend(dev);
209 pm_runtime_disable(dev);
210
211 tidss_oldi_deinit(tidss);
212
213 return ret;
214 }
215
tidss_remove(struct platform_device * pdev)216 static void tidss_remove(struct platform_device *pdev)
217 {
218 struct device *dev = &pdev->dev;
219 struct tidss_device *tidss = platform_get_drvdata(pdev);
220 struct drm_device *ddev = &tidss->ddev;
221
222 dev_dbg(dev, "%s\n", __func__);
223
224 drm_dev_unregister(ddev);
225
226 drm_atomic_helper_shutdown(ddev);
227
228 tidss_irq_uninstall(ddev);
229
230 #ifndef CONFIG_PM
231 /* If we don't have PM, we need to call suspend manually */
232 dispc_runtime_suspend(tidss->dispc);
233 #endif
234 pm_runtime_dont_use_autosuspend(dev);
235 pm_runtime_disable(dev);
236
237 tidss_oldi_deinit(tidss);
238
239 /* devm allocated dispc goes away with the dev so mark it NULL */
240 dispc_remove(tidss);
241
242 dev_dbg(dev, "%s done\n", __func__);
243 }
244
tidss_shutdown(struct platform_device * pdev)245 static void tidss_shutdown(struct platform_device *pdev)
246 {
247 drm_atomic_helper_shutdown(platform_get_drvdata(pdev));
248 }
249
250 static const struct of_device_id tidss_of_table[] = {
251 { .compatible = "ti,k2g-dss", .data = &dispc_k2g_feats, },
252 { .compatible = "ti,am625-dss", .data = &dispc_am625_feats, },
253 { .compatible = "ti,am62a7-dss", .data = &dispc_am62a7_feats, },
254 { .compatible = "ti,am62l-dss", .data = &dispc_am62l_feats, },
255 { .compatible = "ti,am65x-dss", .data = &dispc_am65x_feats, },
256 { .compatible = "ti,j721e-dss", .data = &dispc_j721e_feats, },
257 { }
258 };
259
260 MODULE_DEVICE_TABLE(of, tidss_of_table);
261
262 static struct platform_driver tidss_platform_driver = {
263 .probe = tidss_probe,
264 .remove = tidss_remove,
265 .shutdown = tidss_shutdown,
266 .driver = {
267 .name = "tidss",
268 .pm = pm_ptr(&tidss_pm_ops),
269 .of_match_table = tidss_of_table,
270 .suppress_bind_attrs = true,
271 },
272 };
273
274 drm_module_platform_driver(tidss_platform_driver);
275
276 MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@ti.com>");
277 MODULE_DESCRIPTION("TI Keystone DSS Driver");
278 MODULE_LICENSE("GPL v2");
279