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
tidss_runtime_get(struct tidss_device * tidss)29 int 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
tidss_runtime_put(struct tidss_device * tidss)40 void 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
tidss_pm_runtime_suspend(struct device * dev)52 static 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
tidss_pm_runtime_resume(struct device * dev)61 static 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
tidss_suspend(struct device * dev)75 static 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
tidss_resume(struct device * dev)84 static 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
93 static __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
tidss_release(struct drm_device * ddev)100 static void tidss_release(struct drm_device *ddev)
101 {
102 drm_kms_helper_poll_fini(ddev);
103 }
104
105 DEFINE_DRM_GEM_DMA_FOPS(tidss_fops);
106
107 static 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
tidss_probe(struct platform_device * pdev)119 static 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
195 err_irq_uninstall:
196 tidss_irq_uninstall(ddev);
197
198 err_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
tidss_remove(struct platform_device * pdev)208 static 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
tidss_shutdown(struct platform_device * pdev)235 static void tidss_shutdown(struct platform_device *pdev)
236 {
237 drm_atomic_helper_shutdown(platform_get_drvdata(pdev));
238 }
239
240 static 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
249 MODULE_DEVICE_TABLE(of, tidss_of_table);
250
251 static 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
263 drm_module_platform_driver(tidss_platform_driver);
264
265 MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@ti.com>");
266 MODULE_DESCRIPTION("TI Keystone DSS Driver");
267 MODULE_LICENSE("GPL v2");
268