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 | |
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(dev: tidss->dev); |
36 | WARN_ON(r < 0); |
37 | return r; |
38 | } |
39 | |
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(dev: tidss->dev); |
47 | |
48 | r = pm_runtime_put_autosuspend(dev: tidss->dev); |
49 | WARN_ON(r < 0); |
50 | } |
51 | |
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(dispc: tidss->dispc); |
59 | } |
60 | |
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(dispc: tidss->dispc); |
69 | if (r) |
70 | return r; |
71 | |
72 | return 0; |
73 | } |
74 | |
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(dev: &tidss->ddev); |
82 | } |
83 | |
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(dev: &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 | |
100 | static void tidss_release(struct drm_device *ddev) |
101 | { |
102 | drm_kms_helper_poll_fini(dev: 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 | |
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(ptr: tidss)) |
132 | return PTR_ERR(ptr: 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, data: 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, delay: 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(dev: ddev); |
180 | |
181 | drm_mode_config_reset(dev: ddev); |
182 | |
183 | ret = drm_dev_register(dev: ddev, flags: 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(dev: ddev, preferred_bpp: 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 | |
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(dev: ddev); |
217 | |
218 | drm_atomic_helper_shutdown(dev: 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 | |
235 | static void tidss_shutdown(struct platform_device *pdev) |
236 | { |
237 | drm_atomic_helper_shutdown(dev: 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 | |