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f76ee892 TV |
1 | /* |
2 | * HDMI Connector driver | |
3 | * | |
4 | * Copyright (C) 2013 Texas Instruments | |
5 | * Author: Tomi Valkeinen <tomi.valkeinen@ti.com> | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify it | |
8 | * under the terms of the GNU General Public License version 2 as published by | |
9 | * the Free Software Foundation. | |
10 | */ | |
11 | ||
12 | #include <linux/slab.h> | |
13 | #include <linux/module.h> | |
14 | #include <linux/platform_device.h> | |
15 | #include <linux/of.h> | |
16 | #include <linux/of_gpio.h> | |
17 | ||
18 | #include <drm/drm_edid.h> | |
19 | ||
62d9e44e | 20 | #include <video/omapfb_dss.h> |
f76ee892 TV |
21 | |
22 | static const struct omap_video_timings hdmic_default_timings = { | |
23 | .x_res = 640, | |
24 | .y_res = 480, | |
25 | .pixelclock = 25175000, | |
26 | .hsw = 96, | |
27 | .hfp = 16, | |
28 | .hbp = 48, | |
29 | .vsw = 2, | |
30 | .vfp = 11, | |
31 | .vbp = 31, | |
32 | ||
33 | .vsync_level = OMAPDSS_SIG_ACTIVE_LOW, | |
34 | .hsync_level = OMAPDSS_SIG_ACTIVE_LOW, | |
35 | ||
36 | .interlace = false, | |
37 | }; | |
38 | ||
39 | struct panel_drv_data { | |
40 | struct omap_dss_device dssdev; | |
41 | struct omap_dss_device *in; | |
42 | ||
43 | struct device *dev; | |
44 | ||
45 | struct omap_video_timings timings; | |
46 | ||
47 | int hpd_gpio; | |
48 | }; | |
49 | ||
50 | #define to_panel_data(x) container_of(x, struct panel_drv_data, dssdev) | |
51 | ||
52 | static int hdmic_connect(struct omap_dss_device *dssdev) | |
53 | { | |
54 | struct panel_drv_data *ddata = to_panel_data(dssdev); | |
55 | struct omap_dss_device *in = ddata->in; | |
56 | int r; | |
57 | ||
58 | dev_dbg(ddata->dev, "connect\n"); | |
59 | ||
60 | if (omapdss_device_is_connected(dssdev)) | |
61 | return 0; | |
62 | ||
63 | r = in->ops.hdmi->connect(in, dssdev); | |
64 | if (r) | |
65 | return r; | |
66 | ||
67 | return 0; | |
68 | } | |
69 | ||
70 | static void hdmic_disconnect(struct omap_dss_device *dssdev) | |
71 | { | |
72 | struct panel_drv_data *ddata = to_panel_data(dssdev); | |
73 | struct omap_dss_device *in = ddata->in; | |
74 | ||
75 | dev_dbg(ddata->dev, "disconnect\n"); | |
76 | ||
77 | if (!omapdss_device_is_connected(dssdev)) | |
78 | return; | |
79 | ||
80 | in->ops.hdmi->disconnect(in, dssdev); | |
81 | } | |
82 | ||
83 | static int hdmic_enable(struct omap_dss_device *dssdev) | |
84 | { | |
85 | struct panel_drv_data *ddata = to_panel_data(dssdev); | |
86 | struct omap_dss_device *in = ddata->in; | |
87 | int r; | |
88 | ||
89 | dev_dbg(ddata->dev, "enable\n"); | |
90 | ||
91 | if (!omapdss_device_is_connected(dssdev)) | |
92 | return -ENODEV; | |
93 | ||
94 | if (omapdss_device_is_enabled(dssdev)) | |
95 | return 0; | |
96 | ||
97 | in->ops.hdmi->set_timings(in, &ddata->timings); | |
98 | ||
99 | r = in->ops.hdmi->enable(in); | |
100 | if (r) | |
101 | return r; | |
102 | ||
103 | dssdev->state = OMAP_DSS_DISPLAY_ACTIVE; | |
104 | ||
105 | return r; | |
106 | } | |
107 | ||
108 | static void hdmic_disable(struct omap_dss_device *dssdev) | |
109 | { | |
110 | struct panel_drv_data *ddata = to_panel_data(dssdev); | |
111 | struct omap_dss_device *in = ddata->in; | |
112 | ||
113 | dev_dbg(ddata->dev, "disable\n"); | |
114 | ||
115 | if (!omapdss_device_is_enabled(dssdev)) | |
116 | return; | |
117 | ||
118 | in->ops.hdmi->disable(in); | |
119 | ||
120 | dssdev->state = OMAP_DSS_DISPLAY_DISABLED; | |
121 | } | |
122 | ||
123 | static void hdmic_set_timings(struct omap_dss_device *dssdev, | |
124 | struct omap_video_timings *timings) | |
125 | { | |
126 | struct panel_drv_data *ddata = to_panel_data(dssdev); | |
127 | struct omap_dss_device *in = ddata->in; | |
128 | ||
129 | ddata->timings = *timings; | |
130 | dssdev->panel.timings = *timings; | |
131 | ||
132 | in->ops.hdmi->set_timings(in, timings); | |
133 | } | |
134 | ||
135 | static void hdmic_get_timings(struct omap_dss_device *dssdev, | |
136 | struct omap_video_timings *timings) | |
137 | { | |
138 | struct panel_drv_data *ddata = to_panel_data(dssdev); | |
139 | ||
140 | *timings = ddata->timings; | |
141 | } | |
142 | ||
143 | static int hdmic_check_timings(struct omap_dss_device *dssdev, | |
144 | struct omap_video_timings *timings) | |
145 | { | |
146 | struct panel_drv_data *ddata = to_panel_data(dssdev); | |
147 | struct omap_dss_device *in = ddata->in; | |
148 | ||
149 | return in->ops.hdmi->check_timings(in, timings); | |
150 | } | |
151 | ||
152 | static int hdmic_read_edid(struct omap_dss_device *dssdev, | |
153 | u8 *edid, int len) | |
154 | { | |
155 | struct panel_drv_data *ddata = to_panel_data(dssdev); | |
156 | struct omap_dss_device *in = ddata->in; | |
157 | ||
158 | return in->ops.hdmi->read_edid(in, edid, len); | |
159 | } | |
160 | ||
161 | static bool hdmic_detect(struct omap_dss_device *dssdev) | |
162 | { | |
163 | struct panel_drv_data *ddata = to_panel_data(dssdev); | |
164 | struct omap_dss_device *in = ddata->in; | |
165 | ||
166 | if (gpio_is_valid(ddata->hpd_gpio)) | |
167 | return gpio_get_value_cansleep(ddata->hpd_gpio); | |
168 | else | |
169 | return in->ops.hdmi->detect(in); | |
170 | } | |
171 | ||
172 | static int hdmic_set_hdmi_mode(struct omap_dss_device *dssdev, bool hdmi_mode) | |
173 | { | |
174 | struct panel_drv_data *ddata = to_panel_data(dssdev); | |
175 | struct omap_dss_device *in = ddata->in; | |
176 | ||
177 | return in->ops.hdmi->set_hdmi_mode(in, hdmi_mode); | |
178 | } | |
179 | ||
180 | static int hdmic_set_infoframe(struct omap_dss_device *dssdev, | |
181 | const struct hdmi_avi_infoframe *avi) | |
182 | { | |
183 | struct panel_drv_data *ddata = to_panel_data(dssdev); | |
184 | struct omap_dss_device *in = ddata->in; | |
185 | ||
186 | return in->ops.hdmi->set_infoframe(in, avi); | |
187 | } | |
188 | ||
189 | static struct omap_dss_driver hdmic_driver = { | |
190 | .connect = hdmic_connect, | |
191 | .disconnect = hdmic_disconnect, | |
192 | ||
193 | .enable = hdmic_enable, | |
194 | .disable = hdmic_disable, | |
195 | ||
196 | .set_timings = hdmic_set_timings, | |
197 | .get_timings = hdmic_get_timings, | |
198 | .check_timings = hdmic_check_timings, | |
199 | ||
200 | .get_resolution = omapdss_default_get_resolution, | |
201 | ||
202 | .read_edid = hdmic_read_edid, | |
203 | .detect = hdmic_detect, | |
204 | .set_hdmi_mode = hdmic_set_hdmi_mode, | |
205 | .set_hdmi_infoframe = hdmic_set_infoframe, | |
206 | }; | |
207 | ||
f76ee892 TV |
208 | static int hdmic_probe_of(struct platform_device *pdev) |
209 | { | |
210 | struct panel_drv_data *ddata = platform_get_drvdata(pdev); | |
211 | struct device_node *node = pdev->dev.of_node; | |
212 | struct omap_dss_device *in; | |
213 | int gpio; | |
214 | ||
215 | /* HPD GPIO */ | |
216 | gpio = of_get_named_gpio(node, "hpd-gpios", 0); | |
217 | if (gpio_is_valid(gpio)) | |
218 | ddata->hpd_gpio = gpio; | |
219 | else | |
220 | ddata->hpd_gpio = -ENODEV; | |
221 | ||
222 | in = omapdss_of_find_source_for_first_ep(node); | |
223 | if (IS_ERR(in)) { | |
224 | dev_err(&pdev->dev, "failed to find video source\n"); | |
225 | return PTR_ERR(in); | |
226 | } | |
227 | ||
228 | ddata->in = in; | |
229 | ||
230 | return 0; | |
231 | } | |
232 | ||
233 | static int hdmic_probe(struct platform_device *pdev) | |
234 | { | |
235 | struct panel_drv_data *ddata; | |
236 | struct omap_dss_device *dssdev; | |
237 | int r; | |
238 | ||
b0417013 PU |
239 | if (!pdev->dev.of_node) |
240 | return -ENODEV; | |
241 | ||
f76ee892 TV |
242 | ddata = devm_kzalloc(&pdev->dev, sizeof(*ddata), GFP_KERNEL); |
243 | if (!ddata) | |
244 | return -ENOMEM; | |
245 | ||
246 | platform_set_drvdata(pdev, ddata); | |
247 | ddata->dev = &pdev->dev; | |
248 | ||
b0417013 PU |
249 | r = hdmic_probe_of(pdev); |
250 | if (r) | |
251 | return r; | |
f76ee892 TV |
252 | |
253 | if (gpio_is_valid(ddata->hpd_gpio)) { | |
254 | r = devm_gpio_request_one(&pdev->dev, ddata->hpd_gpio, | |
255 | GPIOF_DIR_IN, "hdmi_hpd"); | |
256 | if (r) | |
257 | goto err_reg; | |
258 | } | |
259 | ||
260 | ddata->timings = hdmic_default_timings; | |
261 | ||
262 | dssdev = &ddata->dssdev; | |
263 | dssdev->driver = &hdmic_driver; | |
264 | dssdev->dev = &pdev->dev; | |
265 | dssdev->type = OMAP_DISPLAY_TYPE_HDMI; | |
266 | dssdev->owner = THIS_MODULE; | |
267 | dssdev->panel.timings = hdmic_default_timings; | |
268 | ||
269 | r = omapdss_register_display(dssdev); | |
270 | if (r) { | |
271 | dev_err(&pdev->dev, "Failed to register panel\n"); | |
272 | goto err_reg; | |
273 | } | |
274 | ||
275 | return 0; | |
276 | err_reg: | |
277 | omap_dss_put_device(ddata->in); | |
278 | return r; | |
279 | } | |
280 | ||
281 | static int __exit hdmic_remove(struct platform_device *pdev) | |
282 | { | |
283 | struct panel_drv_data *ddata = platform_get_drvdata(pdev); | |
284 | struct omap_dss_device *dssdev = &ddata->dssdev; | |
285 | struct omap_dss_device *in = ddata->in; | |
286 | ||
287 | omapdss_unregister_display(&ddata->dssdev); | |
288 | ||
289 | hdmic_disable(dssdev); | |
290 | hdmic_disconnect(dssdev); | |
291 | ||
292 | omap_dss_put_device(in); | |
293 | ||
294 | return 0; | |
295 | } | |
296 | ||
297 | static const struct of_device_id hdmic_of_match[] = { | |
298 | { .compatible = "omapdss,hdmi-connector", }, | |
299 | {}, | |
300 | }; | |
301 | ||
302 | MODULE_DEVICE_TABLE(of, hdmic_of_match); | |
303 | ||
304 | static struct platform_driver hdmi_connector_driver = { | |
305 | .probe = hdmic_probe, | |
306 | .remove = __exit_p(hdmic_remove), | |
307 | .driver = { | |
308 | .name = "connector-hdmi", | |
309 | .of_match_table = hdmic_of_match, | |
310 | .suppress_bind_attrs = true, | |
311 | }, | |
312 | }; | |
313 | ||
314 | module_platform_driver(hdmi_connector_driver); | |
315 | ||
316 | MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@ti.com>"); | |
317 | MODULE_DESCRIPTION("HDMI Connector driver"); | |
318 | MODULE_LICENSE("GPL"); |