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3cb07ee6 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 | ||
d0196c8d | 12 | #include <linux/gpio/consumer.h> |
3cb07ee6 TV |
13 | #include <linux/slab.h> |
14 | #include <linux/module.h> | |
15 | #include <linux/platform_device.h> | |
0b8879f4 | 16 | #include <linux/of.h> |
2c75e3cb | 17 | #include <linux/of_gpio.h> |
3cb07ee6 TV |
18 | |
19 | #include <drm/drm_edid.h> | |
20 | ||
21 | #include <video/omapdss.h> | |
22 | #include <video/omap-panel-data.h> | |
23 | ||
24 | static const struct omap_video_timings hdmic_default_timings = { | |
25 | .x_res = 640, | |
26 | .y_res = 480, | |
d8d78941 | 27 | .pixelclock = 25175000, |
3cb07ee6 TV |
28 | .hsw = 96, |
29 | .hfp = 16, | |
30 | .hbp = 48, | |
31 | .vsw = 2, | |
32 | .vfp = 11, | |
33 | .vbp = 31, | |
34 | ||
35 | .vsync_level = OMAPDSS_SIG_ACTIVE_LOW, | |
36 | .hsync_level = OMAPDSS_SIG_ACTIVE_LOW, | |
37 | ||
38 | .interlace = false, | |
39 | }; | |
40 | ||
41 | struct panel_drv_data { | |
42 | struct omap_dss_device dssdev; | |
43 | struct omap_dss_device *in; | |
44 | ||
45 | struct device *dev; | |
46 | ||
47 | struct omap_video_timings timings; | |
2c75e3cb TV |
48 | |
49 | int hpd_gpio; | |
3cb07ee6 TV |
50 | }; |
51 | ||
52 | #define to_panel_data(x) container_of(x, struct panel_drv_data, dssdev) | |
53 | ||
54 | static int hdmic_connect(struct omap_dss_device *dssdev) | |
55 | { | |
56 | struct panel_drv_data *ddata = to_panel_data(dssdev); | |
57 | struct omap_dss_device *in = ddata->in; | |
58 | int r; | |
59 | ||
60 | dev_dbg(ddata->dev, "connect\n"); | |
61 | ||
62 | if (omapdss_device_is_connected(dssdev)) | |
63 | return 0; | |
64 | ||
65 | r = in->ops.hdmi->connect(in, dssdev); | |
66 | if (r) | |
67 | return r; | |
68 | ||
69 | return 0; | |
70 | } | |
71 | ||
72 | static void hdmic_disconnect(struct omap_dss_device *dssdev) | |
73 | { | |
74 | struct panel_drv_data *ddata = to_panel_data(dssdev); | |
75 | struct omap_dss_device *in = ddata->in; | |
76 | ||
77 | dev_dbg(ddata->dev, "disconnect\n"); | |
78 | ||
79 | if (!omapdss_device_is_connected(dssdev)) | |
80 | return; | |
81 | ||
82 | in->ops.hdmi->disconnect(in, dssdev); | |
83 | } | |
84 | ||
85 | static int hdmic_enable(struct omap_dss_device *dssdev) | |
86 | { | |
87 | struct panel_drv_data *ddata = to_panel_data(dssdev); | |
88 | struct omap_dss_device *in = ddata->in; | |
89 | int r; | |
90 | ||
91 | dev_dbg(ddata->dev, "enable\n"); | |
92 | ||
93 | if (!omapdss_device_is_connected(dssdev)) | |
94 | return -ENODEV; | |
95 | ||
96 | if (omapdss_device_is_enabled(dssdev)) | |
97 | return 0; | |
98 | ||
99 | in->ops.hdmi->set_timings(in, &ddata->timings); | |
100 | ||
101 | r = in->ops.hdmi->enable(in); | |
102 | if (r) | |
103 | return r; | |
104 | ||
105 | dssdev->state = OMAP_DSS_DISPLAY_ACTIVE; | |
106 | ||
107 | return r; | |
108 | } | |
109 | ||
110 | static void hdmic_disable(struct omap_dss_device *dssdev) | |
111 | { | |
112 | struct panel_drv_data *ddata = to_panel_data(dssdev); | |
113 | struct omap_dss_device *in = ddata->in; | |
114 | ||
115 | dev_dbg(ddata->dev, "disable\n"); | |
116 | ||
117 | if (!omapdss_device_is_enabled(dssdev)) | |
118 | return; | |
119 | ||
120 | in->ops.hdmi->disable(in); | |
121 | ||
122 | dssdev->state = OMAP_DSS_DISPLAY_DISABLED; | |
123 | } | |
124 | ||
125 | static void hdmic_set_timings(struct omap_dss_device *dssdev, | |
126 | struct omap_video_timings *timings) | |
127 | { | |
128 | struct panel_drv_data *ddata = to_panel_data(dssdev); | |
129 | struct omap_dss_device *in = ddata->in; | |
130 | ||
131 | ddata->timings = *timings; | |
132 | dssdev->panel.timings = *timings; | |
133 | ||
134 | in->ops.hdmi->set_timings(in, timings); | |
135 | } | |
136 | ||
137 | static void hdmic_get_timings(struct omap_dss_device *dssdev, | |
138 | struct omap_video_timings *timings) | |
139 | { | |
140 | struct panel_drv_data *ddata = to_panel_data(dssdev); | |
141 | ||
142 | *timings = ddata->timings; | |
143 | } | |
144 | ||
145 | static int hdmic_check_timings(struct omap_dss_device *dssdev, | |
146 | struct omap_video_timings *timings) | |
147 | { | |
148 | struct panel_drv_data *ddata = to_panel_data(dssdev); | |
149 | struct omap_dss_device *in = ddata->in; | |
150 | ||
151 | return in->ops.hdmi->check_timings(in, timings); | |
152 | } | |
153 | ||
154 | static int hdmic_read_edid(struct omap_dss_device *dssdev, | |
155 | u8 *edid, int len) | |
156 | { | |
157 | struct panel_drv_data *ddata = to_panel_data(dssdev); | |
158 | struct omap_dss_device *in = ddata->in; | |
159 | ||
160 | return in->ops.hdmi->read_edid(in, edid, len); | |
161 | } | |
162 | ||
163 | static bool hdmic_detect(struct omap_dss_device *dssdev) | |
164 | { | |
165 | struct panel_drv_data *ddata = to_panel_data(dssdev); | |
166 | struct omap_dss_device *in = ddata->in; | |
167 | ||
2c75e3cb TV |
168 | if (gpio_is_valid(ddata->hpd_gpio)) |
169 | return gpio_get_value_cansleep(ddata->hpd_gpio); | |
170 | else | |
171 | return in->ops.hdmi->detect(in); | |
3cb07ee6 TV |
172 | } |
173 | ||
9fb1737d TV |
174 | static int hdmic_set_hdmi_mode(struct omap_dss_device *dssdev, bool hdmi_mode) |
175 | { | |
176 | struct panel_drv_data *ddata = to_panel_data(dssdev); | |
177 | struct omap_dss_device *in = ddata->in; | |
178 | ||
179 | return in->ops.hdmi->set_hdmi_mode(in, hdmi_mode); | |
180 | } | |
181 | ||
182 | static int hdmic_set_infoframe(struct omap_dss_device *dssdev, | |
183 | const struct hdmi_avi_infoframe *avi) | |
184 | { | |
185 | struct panel_drv_data *ddata = to_panel_data(dssdev); | |
186 | struct omap_dss_device *in = ddata->in; | |
187 | ||
188 | return in->ops.hdmi->set_infoframe(in, avi); | |
189 | } | |
190 | ||
3cb07ee6 TV |
191 | static struct omap_dss_driver hdmic_driver = { |
192 | .connect = hdmic_connect, | |
193 | .disconnect = hdmic_disconnect, | |
194 | ||
195 | .enable = hdmic_enable, | |
196 | .disable = hdmic_disable, | |
197 | ||
198 | .set_timings = hdmic_set_timings, | |
199 | .get_timings = hdmic_get_timings, | |
200 | .check_timings = hdmic_check_timings, | |
201 | ||
202 | .get_resolution = omapdss_default_get_resolution, | |
203 | ||
204 | .read_edid = hdmic_read_edid, | |
205 | .detect = hdmic_detect, | |
9fb1737d TV |
206 | .set_hdmi_mode = hdmic_set_hdmi_mode, |
207 | .set_hdmi_infoframe = hdmic_set_infoframe, | |
3cb07ee6 TV |
208 | }; |
209 | ||
0b8879f4 TV |
210 | static int hdmic_probe_of(struct platform_device *pdev) |
211 | { | |
212 | struct panel_drv_data *ddata = platform_get_drvdata(pdev); | |
213 | struct device_node *node = pdev->dev.of_node; | |
214 | struct omap_dss_device *in; | |
2c75e3cb TV |
215 | int gpio; |
216 | ||
217 | /* HPD GPIO */ | |
218 | gpio = of_get_named_gpio(node, "hpd-gpios", 0); | |
219 | if (gpio_is_valid(gpio)) | |
220 | ddata->hpd_gpio = gpio; | |
221 | else | |
222 | ddata->hpd_gpio = -ENODEV; | |
0b8879f4 TV |
223 | |
224 | in = omapdss_of_find_source_for_first_ep(node); | |
225 | if (IS_ERR(in)) { | |
226 | dev_err(&pdev->dev, "failed to find video source\n"); | |
227 | return PTR_ERR(in); | |
228 | } | |
229 | ||
230 | ddata->in = in; | |
231 | ||
232 | return 0; | |
233 | } | |
234 | ||
3cb07ee6 TV |
235 | static int hdmic_probe(struct platform_device *pdev) |
236 | { | |
237 | struct panel_drv_data *ddata; | |
238 | struct omap_dss_device *dssdev; | |
239 | int r; | |
240 | ||
241 | ddata = devm_kzalloc(&pdev->dev, sizeof(*ddata), GFP_KERNEL); | |
242 | if (!ddata) | |
243 | return -ENOMEM; | |
244 | ||
245 | platform_set_drvdata(pdev, ddata); | |
246 | ddata->dev = &pdev->dev; | |
247 | ||
7f7642b5 | 248 | if (!pdev->dev.of_node) |
3cb07ee6 | 249 | return -ENODEV; |
7f7642b5 TV |
250 | |
251 | r = hdmic_probe_of(pdev); | |
252 | if (r) | |
253 | return r; | |
3cb07ee6 | 254 | |
2c75e3cb TV |
255 | if (gpio_is_valid(ddata->hpd_gpio)) { |
256 | r = devm_gpio_request_one(&pdev->dev, ddata->hpd_gpio, | |
257 | GPIOF_DIR_IN, "hdmi_hpd"); | |
258 | if (r) | |
259 | goto err_reg; | |
260 | } | |
261 | ||
3cb07ee6 TV |
262 | ddata->timings = hdmic_default_timings; |
263 | ||
264 | dssdev = &ddata->dssdev; | |
265 | dssdev->driver = &hdmic_driver; | |
266 | dssdev->dev = &pdev->dev; | |
267 | dssdev->type = OMAP_DISPLAY_TYPE_HDMI; | |
268 | dssdev->owner = THIS_MODULE; | |
269 | dssdev->panel.timings = hdmic_default_timings; | |
270 | ||
271 | r = omapdss_register_display(dssdev); | |
272 | if (r) { | |
273 | dev_err(&pdev->dev, "Failed to register panel\n"); | |
274 | goto err_reg; | |
275 | } | |
276 | ||
277 | return 0; | |
278 | err_reg: | |
279 | omap_dss_put_device(ddata->in); | |
280 | return r; | |
281 | } | |
282 | ||
283 | static int __exit hdmic_remove(struct platform_device *pdev) | |
284 | { | |
285 | struct panel_drv_data *ddata = platform_get_drvdata(pdev); | |
286 | struct omap_dss_device *dssdev = &ddata->dssdev; | |
287 | struct omap_dss_device *in = ddata->in; | |
288 | ||
289 | omapdss_unregister_display(&ddata->dssdev); | |
290 | ||
291 | hdmic_disable(dssdev); | |
292 | hdmic_disconnect(dssdev); | |
293 | ||
294 | omap_dss_put_device(in); | |
295 | ||
296 | return 0; | |
297 | } | |
298 | ||
0b8879f4 TV |
299 | static const struct of_device_id hdmic_of_match[] = { |
300 | { .compatible = "omapdss,hdmi-connector", }, | |
301 | {}, | |
302 | }; | |
303 | ||
304 | MODULE_DEVICE_TABLE(of, hdmic_of_match); | |
305 | ||
3cb07ee6 TV |
306 | static struct platform_driver hdmi_connector_driver = { |
307 | .probe = hdmic_probe, | |
308 | .remove = __exit_p(hdmic_remove), | |
309 | .driver = { | |
310 | .name = "connector-hdmi", | |
0b8879f4 | 311 | .of_match_table = hdmic_of_match, |
422ccbd5 | 312 | .suppress_bind_attrs = true, |
3cb07ee6 TV |
313 | }, |
314 | }; | |
315 | ||
316 | module_platform_driver(hdmi_connector_driver); | |
317 | ||
318 | MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@ti.com>"); | |
319 | MODULE_DESCRIPTION("HDMI Connector driver"); | |
320 | MODULE_LICENSE("GPL"); |