This source file includes following definitions.
- tpd_connect
- tpd_disconnect
- tpd_enable
- tpd_disable
- tpd_set_timings
- tpd_get_timings
- tpd_check_timings
- tpd_read_edid
- tpd_detect
- tpd_set_infoframe
- tpd_set_hdmi_mode
- tpd_probe_of
- tpd_probe
- tpd_remove
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9 #include <linux/completion.h>
10 #include <linux/delay.h>
11 #include <linux/module.h>
12 #include <linux/mod_devicetable.h>
13 #include <linux/slab.h>
14 #include <linux/platform_device.h>
15 #include <linux/gpio/consumer.h>
16
17 #include <video/omapfb_dss.h>
18
19 struct panel_drv_data {
20 struct omap_dss_device dssdev;
21 struct omap_dss_device *in;
22
23 struct gpio_desc *ct_cp_hpd_gpio;
24 struct gpio_desc *ls_oe_gpio;
25 struct gpio_desc *hpd_gpio;
26
27 struct omap_video_timings timings;
28 };
29
30 #define to_panel_data(x) container_of(x, struct panel_drv_data, dssdev)
31
32 static int tpd_connect(struct omap_dss_device *dssdev,
33 struct omap_dss_device *dst)
34 {
35 struct panel_drv_data *ddata = to_panel_data(dssdev);
36 struct omap_dss_device *in = ddata->in;
37 int r;
38
39 r = in->ops.hdmi->connect(in, dssdev);
40 if (r)
41 return r;
42
43 dst->src = dssdev;
44 dssdev->dst = dst;
45
46 if (ddata->ct_cp_hpd_gpio) {
47 gpiod_set_value_cansleep(ddata->ct_cp_hpd_gpio, 1);
48
49 udelay(300);
50 }
51
52 return 0;
53 }
54
55 static void tpd_disconnect(struct omap_dss_device *dssdev,
56 struct omap_dss_device *dst)
57 {
58 struct panel_drv_data *ddata = to_panel_data(dssdev);
59 struct omap_dss_device *in = ddata->in;
60
61 WARN_ON(dst != dssdev->dst);
62
63 if (dst != dssdev->dst)
64 return;
65
66 gpiod_set_value_cansleep(ddata->ct_cp_hpd_gpio, 0);
67
68 dst->src = NULL;
69 dssdev->dst = NULL;
70
71 in->ops.hdmi->disconnect(in, &ddata->dssdev);
72 }
73
74 static int tpd_enable(struct omap_dss_device *dssdev)
75 {
76 struct panel_drv_data *ddata = to_panel_data(dssdev);
77 struct omap_dss_device *in = ddata->in;
78 int r;
79
80 if (dssdev->state == OMAP_DSS_DISPLAY_ACTIVE)
81 return 0;
82
83 in->ops.hdmi->set_timings(in, &ddata->timings);
84
85 r = in->ops.hdmi->enable(in);
86 if (r)
87 return r;
88
89 dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
90
91 return r;
92 }
93
94 static void tpd_disable(struct omap_dss_device *dssdev)
95 {
96 struct panel_drv_data *ddata = to_panel_data(dssdev);
97 struct omap_dss_device *in = ddata->in;
98
99 if (dssdev->state != OMAP_DSS_DISPLAY_ACTIVE)
100 return;
101
102 in->ops.hdmi->disable(in);
103
104 dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
105 }
106
107 static void tpd_set_timings(struct omap_dss_device *dssdev,
108 struct omap_video_timings *timings)
109 {
110 struct panel_drv_data *ddata = to_panel_data(dssdev);
111 struct omap_dss_device *in = ddata->in;
112
113 ddata->timings = *timings;
114 dssdev->panel.timings = *timings;
115
116 in->ops.hdmi->set_timings(in, timings);
117 }
118
119 static void tpd_get_timings(struct omap_dss_device *dssdev,
120 struct omap_video_timings *timings)
121 {
122 struct panel_drv_data *ddata = to_panel_data(dssdev);
123
124 *timings = ddata->timings;
125 }
126
127 static int tpd_check_timings(struct omap_dss_device *dssdev,
128 struct omap_video_timings *timings)
129 {
130 struct panel_drv_data *ddata = to_panel_data(dssdev);
131 struct omap_dss_device *in = ddata->in;
132 int r;
133
134 r = in->ops.hdmi->check_timings(in, timings);
135
136 return r;
137 }
138
139 static int tpd_read_edid(struct omap_dss_device *dssdev,
140 u8 *edid, int len)
141 {
142 struct panel_drv_data *ddata = to_panel_data(dssdev);
143 struct omap_dss_device *in = ddata->in;
144 int r;
145
146 if (!gpiod_get_value_cansleep(ddata->hpd_gpio))
147 return -ENODEV;
148
149 gpiod_set_value_cansleep(ddata->ls_oe_gpio, 1);
150
151 r = in->ops.hdmi->read_edid(in, edid, len);
152
153 gpiod_set_value_cansleep(ddata->ls_oe_gpio, 0);
154
155 return r;
156 }
157
158 static bool tpd_detect(struct omap_dss_device *dssdev)
159 {
160 struct panel_drv_data *ddata = to_panel_data(dssdev);
161
162 return gpiod_get_value_cansleep(ddata->hpd_gpio);
163 }
164
165 static int tpd_set_infoframe(struct omap_dss_device *dssdev,
166 const struct hdmi_avi_infoframe *avi)
167 {
168 struct panel_drv_data *ddata = to_panel_data(dssdev);
169 struct omap_dss_device *in = ddata->in;
170
171 return in->ops.hdmi->set_infoframe(in, avi);
172 }
173
174 static int tpd_set_hdmi_mode(struct omap_dss_device *dssdev,
175 bool hdmi_mode)
176 {
177 struct panel_drv_data *ddata = to_panel_data(dssdev);
178 struct omap_dss_device *in = ddata->in;
179
180 return in->ops.hdmi->set_hdmi_mode(in, hdmi_mode);
181 }
182
183 static const struct omapdss_hdmi_ops tpd_hdmi_ops = {
184 .connect = tpd_connect,
185 .disconnect = tpd_disconnect,
186
187 .enable = tpd_enable,
188 .disable = tpd_disable,
189
190 .check_timings = tpd_check_timings,
191 .set_timings = tpd_set_timings,
192 .get_timings = tpd_get_timings,
193
194 .read_edid = tpd_read_edid,
195 .detect = tpd_detect,
196 .set_infoframe = tpd_set_infoframe,
197 .set_hdmi_mode = tpd_set_hdmi_mode,
198 };
199
200 static int tpd_probe_of(struct platform_device *pdev)
201 {
202 struct panel_drv_data *ddata = platform_get_drvdata(pdev);
203 struct device_node *node = pdev->dev.of_node;
204 struct omap_dss_device *in;
205
206 in = omapdss_of_find_source_for_first_ep(node);
207 if (IS_ERR(in)) {
208 dev_err(&pdev->dev, "failed to find video source\n");
209 return PTR_ERR(in);
210 }
211
212 ddata->in = in;
213
214 return 0;
215 }
216
217 static int tpd_probe(struct platform_device *pdev)
218 {
219 struct omap_dss_device *dssdev;
220 struct panel_drv_data *ddata;
221 int r;
222 struct gpio_desc *gpio;
223
224 ddata = devm_kzalloc(&pdev->dev, sizeof(*ddata), GFP_KERNEL);
225 if (!ddata)
226 return -ENOMEM;
227
228 platform_set_drvdata(pdev, ddata);
229
230 if (pdev->dev.of_node) {
231 r = tpd_probe_of(pdev);
232 if (r)
233 return r;
234 } else {
235 return -ENODEV;
236 }
237
238 gpio = devm_gpiod_get_index_optional(&pdev->dev, NULL, 0,
239 GPIOD_OUT_LOW);
240 if (IS_ERR(gpio)) {
241 r = PTR_ERR(gpio);
242 goto err_gpio;
243 }
244
245 ddata->ct_cp_hpd_gpio = gpio;
246
247 gpio = devm_gpiod_get_index_optional(&pdev->dev, NULL, 1,
248 GPIOD_OUT_LOW);
249 if (IS_ERR(gpio)) {
250 r = PTR_ERR(gpio);
251 goto err_gpio;
252 }
253
254 ddata->ls_oe_gpio = gpio;
255
256 gpio = devm_gpiod_get_index(&pdev->dev, NULL, 2,
257 GPIOD_IN);
258 if (IS_ERR(gpio)) {
259 r = PTR_ERR(gpio);
260 goto err_gpio;
261 }
262
263 ddata->hpd_gpio = gpio;
264
265 dssdev = &ddata->dssdev;
266 dssdev->ops.hdmi = &tpd_hdmi_ops;
267 dssdev->dev = &pdev->dev;
268 dssdev->type = OMAP_DISPLAY_TYPE_HDMI;
269 dssdev->output_type = OMAP_DISPLAY_TYPE_HDMI;
270 dssdev->owner = THIS_MODULE;
271 dssdev->port_num = 1;
272
273 r = omapdss_register_output(dssdev);
274 if (r) {
275 dev_err(&pdev->dev, "Failed to register output\n");
276 goto err_reg;
277 }
278
279 return 0;
280 err_reg:
281 err_gpio:
282 omap_dss_put_device(ddata->in);
283 return r;
284 }
285
286 static int __exit tpd_remove(struct platform_device *pdev)
287 {
288 struct panel_drv_data *ddata = platform_get_drvdata(pdev);
289 struct omap_dss_device *dssdev = &ddata->dssdev;
290 struct omap_dss_device *in = ddata->in;
291
292 omapdss_unregister_output(&ddata->dssdev);
293
294 WARN_ON(omapdss_device_is_enabled(dssdev));
295 if (omapdss_device_is_enabled(dssdev))
296 tpd_disable(dssdev);
297
298 WARN_ON(omapdss_device_is_connected(dssdev));
299 if (omapdss_device_is_connected(dssdev))
300 tpd_disconnect(dssdev, dssdev->dst);
301
302 omap_dss_put_device(in);
303
304 return 0;
305 }
306
307 static const struct of_device_id tpd_of_match[] = {
308 { .compatible = "omapdss,ti,tpd12s015", },
309 {},
310 };
311
312 MODULE_DEVICE_TABLE(of, tpd_of_match);
313
314 static struct platform_driver tpd_driver = {
315 .probe = tpd_probe,
316 .remove = __exit_p(tpd_remove),
317 .driver = {
318 .name = "tpd12s015",
319 .of_match_table = tpd_of_match,
320 .suppress_bind_attrs = true,
321 },
322 };
323
324 module_platform_driver(tpd_driver);
325
326 MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@ti.com>");
327 MODULE_DESCRIPTION("TPD12S015 driver");
328 MODULE_LICENSE("GPL");