xref: /linux/drivers/video/fbdev/omap2/omapfb/displays/connector-hdmi.c (revision 9066258d0a533530c2508f784e85c53b44f5d9e4)
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * HDMI Connector driver
4  *
5  * Copyright (C) 2013 Texas Instruments
6  * Author: Tomi Valkeinen <tomi.valkeinen@ti.com>
7  */
8 
9 #include <linux/err.h>
10 #include <linux/gpio/consumer.h>
11 #include <linux/slab.h>
12 #include <linux/module.h>
13 #include <linux/platform_device.h>
14 #include <linux/of.h>
15 
16 #include <drm/drm_edid.h>
17 
18 #include <video/omapfb_dss.h>
19 
20 static const struct omap_video_timings hdmic_default_timings = {
21 	.x_res		= 640,
22 	.y_res		= 480,
23 	.pixelclock	= 25175000,
24 	.hsw		= 96,
25 	.hfp		= 16,
26 	.hbp		= 48,
27 	.vsw		= 2,
28 	.vfp		= 11,
29 	.vbp		= 31,
30 
31 	.vsync_level	= OMAPDSS_SIG_ACTIVE_LOW,
32 	.hsync_level	= OMAPDSS_SIG_ACTIVE_LOW,
33 
34 	.interlace	= false,
35 };
36 
37 struct panel_drv_data {
38 	struct omap_dss_device dssdev;
39 	struct omap_dss_device *in;
40 
41 	struct device *dev;
42 
43 	struct omap_video_timings timings;
44 
45 	struct gpio_desc *hpd_gpio;
46 };
47 
48 #define to_panel_data(x) container_of(x, struct panel_drv_data, dssdev)
49 
hdmic_connect(struct omap_dss_device * dssdev)50 static int hdmic_connect(struct omap_dss_device *dssdev)
51 {
52 	struct panel_drv_data *ddata = to_panel_data(dssdev);
53 	struct omap_dss_device *in = ddata->in;
54 
55 	dev_dbg(ddata->dev, "connect\n");
56 
57 	if (omapdss_device_is_connected(dssdev))
58 		return 0;
59 
60 	return in->ops.hdmi->connect(in, dssdev);
61 }
62 
hdmic_disconnect(struct omap_dss_device * dssdev)63 static void hdmic_disconnect(struct omap_dss_device *dssdev)
64 {
65 	struct panel_drv_data *ddata = to_panel_data(dssdev);
66 	struct omap_dss_device *in = ddata->in;
67 
68 	dev_dbg(ddata->dev, "disconnect\n");
69 
70 	if (!omapdss_device_is_connected(dssdev))
71 		return;
72 
73 	in->ops.hdmi->disconnect(in, dssdev);
74 }
75 
hdmic_enable(struct omap_dss_device * dssdev)76 static int hdmic_enable(struct omap_dss_device *dssdev)
77 {
78 	struct panel_drv_data *ddata = to_panel_data(dssdev);
79 	struct omap_dss_device *in = ddata->in;
80 	int r;
81 
82 	dev_dbg(ddata->dev, "enable\n");
83 
84 	if (!omapdss_device_is_connected(dssdev))
85 		return -ENODEV;
86 
87 	if (omapdss_device_is_enabled(dssdev))
88 		return 0;
89 
90 	in->ops.hdmi->set_timings(in, &ddata->timings);
91 
92 	r = in->ops.hdmi->enable(in);
93 	if (r)
94 		return r;
95 
96 	dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
97 
98 	return r;
99 }
100 
hdmic_disable(struct omap_dss_device * dssdev)101 static void hdmic_disable(struct omap_dss_device *dssdev)
102 {
103 	struct panel_drv_data *ddata = to_panel_data(dssdev);
104 	struct omap_dss_device *in = ddata->in;
105 
106 	dev_dbg(ddata->dev, "disable\n");
107 
108 	if (!omapdss_device_is_enabled(dssdev))
109 		return;
110 
111 	in->ops.hdmi->disable(in);
112 
113 	dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
114 }
115 
hdmic_set_timings(struct omap_dss_device * dssdev,struct omap_video_timings * timings)116 static void hdmic_set_timings(struct omap_dss_device *dssdev,
117 		struct omap_video_timings *timings)
118 {
119 	struct panel_drv_data *ddata = to_panel_data(dssdev);
120 	struct omap_dss_device *in = ddata->in;
121 
122 	ddata->timings = *timings;
123 	dssdev->panel.timings = *timings;
124 
125 	in->ops.hdmi->set_timings(in, timings);
126 }
127 
hdmic_get_timings(struct omap_dss_device * dssdev,struct omap_video_timings * timings)128 static void hdmic_get_timings(struct omap_dss_device *dssdev,
129 		struct omap_video_timings *timings)
130 {
131 	struct panel_drv_data *ddata = to_panel_data(dssdev);
132 
133 	*timings = ddata->timings;
134 }
135 
hdmic_check_timings(struct omap_dss_device * dssdev,struct omap_video_timings * timings)136 static int hdmic_check_timings(struct omap_dss_device *dssdev,
137 		struct omap_video_timings *timings)
138 {
139 	struct panel_drv_data *ddata = to_panel_data(dssdev);
140 	struct omap_dss_device *in = ddata->in;
141 
142 	return in->ops.hdmi->check_timings(in, timings);
143 }
144 
hdmic_read_edid(struct omap_dss_device * dssdev,u8 * edid,int len)145 static int hdmic_read_edid(struct omap_dss_device *dssdev,
146 		u8 *edid, int len)
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->read_edid(in, edid, len);
152 }
153 
hdmic_detect(struct omap_dss_device * dssdev)154 static bool hdmic_detect(struct omap_dss_device *dssdev)
155 {
156 	struct panel_drv_data *ddata = to_panel_data(dssdev);
157 	struct omap_dss_device *in = ddata->in;
158 
159 	if (ddata->hpd_gpio)
160 		return gpiod_get_value_cansleep(ddata->hpd_gpio);
161 	else
162 		return in->ops.hdmi->detect(in);
163 }
164 
hdmic_set_hdmi_mode(struct omap_dss_device * dssdev,bool hdmi_mode)165 static int hdmic_set_hdmi_mode(struct omap_dss_device *dssdev, bool hdmi_mode)
166 {
167 	struct panel_drv_data *ddata = to_panel_data(dssdev);
168 	struct omap_dss_device *in = ddata->in;
169 
170 	return in->ops.hdmi->set_hdmi_mode(in, hdmi_mode);
171 }
172 
hdmic_set_infoframe(struct omap_dss_device * dssdev,const struct hdmi_avi_infoframe * avi)173 static int hdmic_set_infoframe(struct omap_dss_device *dssdev,
174 		const struct hdmi_avi_infoframe *avi)
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_infoframe(in, avi);
180 }
181 
182 static struct omap_dss_driver hdmic_driver = {
183 	.connect		= hdmic_connect,
184 	.disconnect		= hdmic_disconnect,
185 
186 	.enable			= hdmic_enable,
187 	.disable		= hdmic_disable,
188 
189 	.set_timings		= hdmic_set_timings,
190 	.get_timings		= hdmic_get_timings,
191 	.check_timings		= hdmic_check_timings,
192 
193 	.get_resolution		= omapdss_default_get_resolution,
194 
195 	.read_edid		= hdmic_read_edid,
196 	.detect			= hdmic_detect,
197 	.set_hdmi_mode		= hdmic_set_hdmi_mode,
198 	.set_hdmi_infoframe	= hdmic_set_infoframe,
199 };
200 
hdmic_probe(struct platform_device * pdev)201 static int hdmic_probe(struct platform_device *pdev)
202 {
203 	struct panel_drv_data *ddata;
204 	struct omap_dss_device *dssdev;
205 	int r;
206 
207 	if (!pdev->dev.of_node)
208 		return -ENODEV;
209 
210 	ddata = devm_kzalloc(&pdev->dev, sizeof(*ddata), GFP_KERNEL);
211 	if (!ddata)
212 		return -ENOMEM;
213 
214 	platform_set_drvdata(pdev, ddata);
215 	ddata->dev = &pdev->dev;
216 
217 	ddata->hpd_gpio = devm_gpiod_get_optional(&pdev->dev, "hpd", GPIOD_IN);
218 	r = PTR_ERR_OR_ZERO(ddata->hpd_gpio);
219 	if (r)
220 		return r;
221 
222 	gpiod_set_consumer_name(ddata->hpd_gpio, "hdmi_hpd");
223 
224 	ddata->in = omapdss_of_find_source_for_first_ep(pdev->dev.of_node);
225 	r = PTR_ERR_OR_ZERO(ddata->in);
226 	if (r) {
227 		dev_err(&pdev->dev, "failed to find video source\n");
228 		return r;
229 	}
230 
231 	ddata->timings = hdmic_default_timings;
232 
233 	dssdev = &ddata->dssdev;
234 	dssdev->driver = &hdmic_driver;
235 	dssdev->dev = &pdev->dev;
236 	dssdev->type = OMAP_DISPLAY_TYPE_HDMI;
237 	dssdev->owner = THIS_MODULE;
238 	dssdev->panel.timings = hdmic_default_timings;
239 
240 	r = omapdss_register_display(dssdev);
241 	if (r) {
242 		dev_err(&pdev->dev, "Failed to register panel\n");
243 		goto err_reg;
244 	}
245 
246 	return 0;
247 err_reg:
248 	omap_dss_put_device(ddata->in);
249 	return r;
250 }
251 
hdmic_remove(struct platform_device * pdev)252 static void hdmic_remove(struct platform_device *pdev)
253 {
254 	struct panel_drv_data *ddata = platform_get_drvdata(pdev);
255 	struct omap_dss_device *dssdev = &ddata->dssdev;
256 	struct omap_dss_device *in = ddata->in;
257 
258 	omapdss_unregister_display(&ddata->dssdev);
259 
260 	hdmic_disable(dssdev);
261 	hdmic_disconnect(dssdev);
262 
263 	omap_dss_put_device(in);
264 }
265 
266 static const struct of_device_id hdmic_of_match[] = {
267 	{ .compatible = "omapdss,hdmi-connector", },
268 	{},
269 };
270 
271 MODULE_DEVICE_TABLE(of, hdmic_of_match);
272 
273 static struct platform_driver hdmi_connector_driver = {
274 	.probe	= hdmic_probe,
275 	.remove	= hdmic_remove,
276 	.driver	= {
277 		.name	= "connector-hdmi",
278 		.of_match_table = hdmic_of_match,
279 	},
280 };
281 
282 module_platform_driver(hdmi_connector_driver);
283 
284 MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@ti.com>");
285 MODULE_DESCRIPTION("HDMI Connector driver");
286 MODULE_LICENSE("GPL");
287