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