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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// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * HDMI Connector driver
4 *
5 * Copyright (C) 2013 Texas Instruments Incorporated - http://www.ti.com/
6 * Author: Tomi Valkeinen <tomi.valkeinen@ti.com>
7 */
8
9#include <linux/gpio/consumer.h>
10#include <linux/module.h>
11#include <linux/mutex.h>
12#include <linux/platform_device.h>
13#include <linux/slab.h>
14
15#include "../dss/omapdss.h"
16
17struct panel_drv_data {
18 struct omap_dss_device dssdev;
19 void (*hpd_cb)(void *cb_data, enum drm_connector_status status);
20 void *hpd_cb_data;
21 struct mutex hpd_lock;
22
23 struct device *dev;
24
25 struct gpio_desc *hpd_gpio;
26};
27
28#define to_panel_data(x) container_of(x, struct panel_drv_data, dssdev)
29
30static int hdmic_connect(struct omap_dss_device *src,
31 struct omap_dss_device *dst)
32{
33 return 0;
34}
35
36static void hdmic_disconnect(struct omap_dss_device *src,
37 struct omap_dss_device *dst)
38{
39}
40
41static bool hdmic_detect(struct omap_dss_device *dssdev)
42{
43 struct panel_drv_data *ddata = to_panel_data(dssdev);
44
45 return gpiod_get_value_cansleep(ddata->hpd_gpio);
46}
47
48static void hdmic_register_hpd_cb(struct omap_dss_device *dssdev,
49 void (*cb)(void *cb_data,
50 enum drm_connector_status status),
51 void *cb_data)
52{
53 struct panel_drv_data *ddata = to_panel_data(dssdev);
54
55 mutex_lock(&ddata->hpd_lock);
56 ddata->hpd_cb = cb;
57 ddata->hpd_cb_data = cb_data;
58 mutex_unlock(&ddata->hpd_lock);
59}
60
61static void hdmic_unregister_hpd_cb(struct omap_dss_device *dssdev)
62{
63 struct panel_drv_data *ddata = to_panel_data(dssdev);
64
65 mutex_lock(&ddata->hpd_lock);
66 ddata->hpd_cb = NULL;
67 ddata->hpd_cb_data = NULL;
68 mutex_unlock(&ddata->hpd_lock);
69}
70
71static const struct omap_dss_device_ops hdmic_ops = {
72 .connect = hdmic_connect,
73 .disconnect = hdmic_disconnect,
74
75 .detect = hdmic_detect,
76 .register_hpd_cb = hdmic_register_hpd_cb,
77 .unregister_hpd_cb = hdmic_unregister_hpd_cb,
78};
79
80static irqreturn_t hdmic_hpd_isr(int irq, void *data)
81{
82 struct panel_drv_data *ddata = data;
83
84 mutex_lock(&ddata->hpd_lock);
85 if (ddata->hpd_cb) {
86 enum drm_connector_status status;
87
88 if (hdmic_detect(&ddata->dssdev))
89 status = connector_status_connected;
90 else
91 status = connector_status_disconnected;
92
93 ddata->hpd_cb(ddata->hpd_cb_data, status);
94 }
95 mutex_unlock(&ddata->hpd_lock);
96
97 return IRQ_HANDLED;
98}
99
100static int hdmic_probe(struct platform_device *pdev)
101{
102 struct panel_drv_data *ddata;
103 struct omap_dss_device *dssdev;
104 struct gpio_desc *gpio;
105 int r;
106
107 ddata = devm_kzalloc(&pdev->dev, sizeof(*ddata), GFP_KERNEL);
108 if (!ddata)
109 return -ENOMEM;
110
111 platform_set_drvdata(pdev, ddata);
112 ddata->dev = &pdev->dev;
113
114 mutex_init(&ddata->hpd_lock);
115
116 /* HPD GPIO */
117 gpio = devm_gpiod_get_optional(&pdev->dev, "hpd", GPIOD_IN);
118 if (IS_ERR(gpio)) {
119 dev_err(&pdev->dev, "failed to parse HPD gpio\n");
120 return PTR_ERR(gpio);
121 }
122
123 ddata->hpd_gpio = gpio;
124
125 if (ddata->hpd_gpio) {
126 r = devm_request_threaded_irq(&pdev->dev,
127 gpiod_to_irq(ddata->hpd_gpio),
128 NULL, hdmic_hpd_isr,
129 IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING |
130 IRQF_ONESHOT,
131 "hdmic hpd", ddata);
132 if (r)
133 return r;
134 }
135
136 dssdev = &ddata->dssdev;
137 dssdev->ops = &hdmic_ops;
138 dssdev->dev = &pdev->dev;
139 dssdev->type = OMAP_DISPLAY_TYPE_HDMI;
140 dssdev->display = true;
141 dssdev->owner = THIS_MODULE;
142 dssdev->of_ports = BIT(0);
143 dssdev->ops_flags = ddata->hpd_gpio
144 ? OMAP_DSS_DEVICE_OP_DETECT | OMAP_DSS_DEVICE_OP_HPD
145 : 0;
146
147 omapdss_display_init(dssdev);
148 omapdss_device_register(dssdev);
149
150 return 0;
151}
152
153static int __exit hdmic_remove(struct platform_device *pdev)
154{
155 struct panel_drv_data *ddata = platform_get_drvdata(pdev);
156
157 omapdss_device_unregister(&ddata->dssdev);
158
159 return 0;
160}
161
162static const struct of_device_id hdmic_of_match[] = {
163 { .compatible = "omapdss,hdmi-connector", },
164 {},
165};
166
167MODULE_DEVICE_TABLE(of, hdmic_of_match);
168
169static struct platform_driver hdmi_connector_driver = {
170 .probe = hdmic_probe,
171 .remove = __exit_p(hdmic_remove),
172 .driver = {
173 .name = "connector-hdmi",
174 .of_match_table = hdmic_of_match,
175 .suppress_bind_attrs = true,
176 },
177};
178
179module_platform_driver(hdmi_connector_driver);
180
181MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@ti.com>");
182MODULE_DESCRIPTION("HDMI Connector driver");
183MODULE_LICENSE("GPL");