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_client_setup.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
28 /* Power management */
29
tidss_runtime_get(struct tidss_device * tidss)30 int tidss_runtime_get(struct tidss_device *tidss)
31 {
32 int r;
33
34 dev_dbg(tidss->dev, "%s\n", __func__);
35
36 r = pm_runtime_resume_and_get(tidss->dev);
37 WARN_ON(r < 0);
38 return r;
39 }
40
tidss_runtime_put(struct tidss_device * tidss)41 void tidss_runtime_put(struct tidss_device *tidss)
42 {
43 int r;
44
45 dev_dbg(tidss->dev, "%s\n", __func__);
46
47 pm_runtime_mark_last_busy(tidss->dev);
48
49 r = pm_runtime_put_autosuspend(tidss->dev);
50 WARN_ON(r < 0);
51 }
52
tidss_pm_runtime_suspend(struct device * dev)53 static int __maybe_unused tidss_pm_runtime_suspend(struct device *dev)
54 {
55 struct tidss_device *tidss = dev_get_drvdata(dev);
56
57 dev_dbg(dev, "%s\n", __func__);
58
59 return dispc_runtime_suspend(tidss->dispc);
60 }
61
tidss_pm_runtime_resume(struct device * dev)62 static int __maybe_unused tidss_pm_runtime_resume(struct device *dev)
63 {
64 struct tidss_device *tidss = dev_get_drvdata(dev);
65 int r;
66
67 dev_dbg(dev, "%s\n", __func__);
68
69 r = dispc_runtime_resume(tidss->dispc);
70 if (r)
71 return r;
72
73 return 0;
74 }
75
tidss_suspend(struct device * dev)76 static int __maybe_unused tidss_suspend(struct device *dev)
77 {
78 struct tidss_device *tidss = dev_get_drvdata(dev);
79
80 dev_dbg(dev, "%s\n", __func__);
81
82 return drm_mode_config_helper_suspend(&tidss->ddev);
83 }
84
tidss_resume(struct device * dev)85 static int __maybe_unused tidss_resume(struct device *dev)
86 {
87 struct tidss_device *tidss = dev_get_drvdata(dev);
88
89 dev_dbg(dev, "%s\n", __func__);
90
91 return drm_mode_config_helper_resume(&tidss->ddev);
92 }
93
94 static __maybe_unused const struct dev_pm_ops tidss_pm_ops = {
95 SET_SYSTEM_SLEEP_PM_OPS(tidss_suspend, tidss_resume)
96 SET_RUNTIME_PM_OPS(tidss_pm_runtime_suspend, tidss_pm_runtime_resume, NULL)
97 };
98
99 /* DRM device Information */
100
tidss_release(struct drm_device * ddev)101 static void tidss_release(struct drm_device *ddev)
102 {
103 drm_kms_helper_poll_fini(ddev);
104 }
105
106 DEFINE_DRM_GEM_DMA_FOPS(tidss_fops);
107
108 static const struct drm_driver tidss_driver = {
109 .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
110 .fops = &tidss_fops,
111 .release = tidss_release,
112 DRM_GEM_DMA_DRIVER_OPS_VMAP,
113 DRM_FBDEV_DMA_DRIVER_OPS,
114 .name = "tidss",
115 .desc = "TI Keystone DSS",
116 .date = "20180215",
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->wait_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 pm_runtime_enable(dev);
152
153 pm_runtime_set_autosuspend_delay(dev, 1000);
154 pm_runtime_use_autosuspend(dev);
155
156 #ifndef CONFIG_PM
157 /* If we don't have PM, we need to call resume manually */
158 dispc_runtime_resume(tidss->dispc);
159 #endif
160
161 ret = tidss_modeset_init(tidss);
162 if (ret < 0) {
163 if (ret != -EPROBE_DEFER)
164 dev_err(dev, "failed to init DRM/KMS (%d)\n", ret);
165 goto err_runtime_suspend;
166 }
167
168 irq = platform_get_irq(pdev, 0);
169 if (irq < 0) {
170 ret = irq;
171 goto err_runtime_suspend;
172 }
173 tidss->irq = irq;
174
175 ret = tidss_irq_install(ddev, irq);
176 if (ret) {
177 dev_err(dev, "tidss_irq_install failed: %d\n", ret);
178 goto err_runtime_suspend;
179 }
180
181 drm_kms_helper_poll_init(ddev);
182
183 drm_mode_config_reset(ddev);
184
185 ret = drm_dev_register(ddev, 0);
186 if (ret) {
187 dev_err(dev, "failed to register DRM device\n");
188 goto err_irq_uninstall;
189 }
190
191 drm_client_setup(ddev, NULL);
192
193 dev_dbg(dev, "%s done\n", __func__);
194
195 return 0;
196
197 err_irq_uninstall:
198 tidss_irq_uninstall(ddev);
199
200 err_runtime_suspend:
201 #ifndef CONFIG_PM
202 dispc_runtime_suspend(tidss->dispc);
203 #endif
204 pm_runtime_dont_use_autosuspend(dev);
205 pm_runtime_disable(dev);
206
207 return ret;
208 }
209
tidss_remove(struct platform_device * pdev)210 static void tidss_remove(struct platform_device *pdev)
211 {
212 struct device *dev = &pdev->dev;
213 struct tidss_device *tidss = platform_get_drvdata(pdev);
214 struct drm_device *ddev = &tidss->ddev;
215
216 dev_dbg(dev, "%s\n", __func__);
217
218 drm_dev_unregister(ddev);
219
220 drm_atomic_helper_shutdown(ddev);
221
222 tidss_irq_uninstall(ddev);
223
224 #ifndef CONFIG_PM
225 /* If we don't have PM, we need to call suspend manually */
226 dispc_runtime_suspend(tidss->dispc);
227 #endif
228 pm_runtime_dont_use_autosuspend(dev);
229 pm_runtime_disable(dev);
230
231 /* devm allocated dispc goes away with the dev so mark it NULL */
232 dispc_remove(tidss);
233
234 dev_dbg(dev, "%s done\n", __func__);
235 }
236
tidss_shutdown(struct platform_device * pdev)237 static void tidss_shutdown(struct platform_device *pdev)
238 {
239 drm_atomic_helper_shutdown(platform_get_drvdata(pdev));
240 }
241
242 static const struct of_device_id tidss_of_table[] = {
243 { .compatible = "ti,k2g-dss", .data = &dispc_k2g_feats, },
244 { .compatible = "ti,am625-dss", .data = &dispc_am625_feats, },
245 { .compatible = "ti,am62a7-dss", .data = &dispc_am62a7_feats, },
246 { .compatible = "ti,am65x-dss", .data = &dispc_am65x_feats, },
247 { .compatible = "ti,j721e-dss", .data = &dispc_j721e_feats, },
248 { }
249 };
250
251 MODULE_DEVICE_TABLE(of, tidss_of_table);
252
253 static struct platform_driver tidss_platform_driver = {
254 .probe = tidss_probe,
255 .remove = tidss_remove,
256 .shutdown = tidss_shutdown,
257 .driver = {
258 .name = "tidss",
259 .pm = pm_ptr(&tidss_pm_ops),
260 .of_match_table = tidss_of_table,
261 .suppress_bind_attrs = true,
262 },
263 };
264
265 drm_module_platform_driver(tidss_platform_driver);
266
267 MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@ti.com>");
268 MODULE_DESCRIPTION("TI Keystone DSS Driver");
269 MODULE_LICENSE("GPL v2");
270