This source file includes following definitions.
- tpd_connect
- tpd_disconnect
- tpd_detect
- tpd_register_hpd_cb
- tpd_unregister_hpd_cb
- tpd_hpd_isr
- tpd_probe
- tpd_remove
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8
9 #include <linux/completion.h>
10 #include <linux/delay.h>
11 #include <linux/module.h>
12 #include <linux/slab.h>
13 #include <linux/platform_device.h>
14 #include <linux/gpio/consumer.h>
15 #include <linux/mutex.h>
16
17 #include "../dss/omapdss.h"
18
19 struct panel_drv_data {
20 struct omap_dss_device dssdev;
21 void (*hpd_cb)(void *cb_data, enum drm_connector_status status);
22 void *hpd_cb_data;
23 struct mutex hpd_lock;
24
25 struct gpio_desc *ct_cp_hpd_gpio;
26 struct gpio_desc *ls_oe_gpio;
27 struct gpio_desc *hpd_gpio;
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 *src,
33 struct omap_dss_device *dst)
34 {
35 struct panel_drv_data *ddata = to_panel_data(dst);
36 int r;
37
38 r = omapdss_device_connect(dst->dss, dst, dst->next);
39 if (r)
40 return r;
41
42 gpiod_set_value_cansleep(ddata->ct_cp_hpd_gpio, 1);
43 gpiod_set_value_cansleep(ddata->ls_oe_gpio, 1);
44
45
46 udelay(300);
47
48 return 0;
49 }
50
51 static void tpd_disconnect(struct omap_dss_device *src,
52 struct omap_dss_device *dst)
53 {
54 struct panel_drv_data *ddata = to_panel_data(dst);
55
56 gpiod_set_value_cansleep(ddata->ct_cp_hpd_gpio, 0);
57 gpiod_set_value_cansleep(ddata->ls_oe_gpio, 0);
58
59 omapdss_device_disconnect(dst, dst->next);
60 }
61
62 static bool tpd_detect(struct omap_dss_device *dssdev)
63 {
64 struct panel_drv_data *ddata = to_panel_data(dssdev);
65
66 return gpiod_get_value_cansleep(ddata->hpd_gpio);
67 }
68
69 static void tpd_register_hpd_cb(struct omap_dss_device *dssdev,
70 void (*cb)(void *cb_data,
71 enum drm_connector_status status),
72 void *cb_data)
73 {
74 struct panel_drv_data *ddata = to_panel_data(dssdev);
75
76 mutex_lock(&ddata->hpd_lock);
77 ddata->hpd_cb = cb;
78 ddata->hpd_cb_data = cb_data;
79 mutex_unlock(&ddata->hpd_lock);
80 }
81
82 static void tpd_unregister_hpd_cb(struct omap_dss_device *dssdev)
83 {
84 struct panel_drv_data *ddata = to_panel_data(dssdev);
85
86 mutex_lock(&ddata->hpd_lock);
87 ddata->hpd_cb = NULL;
88 ddata->hpd_cb_data = NULL;
89 mutex_unlock(&ddata->hpd_lock);
90 }
91
92 static const struct omap_dss_device_ops tpd_ops = {
93 .connect = tpd_connect,
94 .disconnect = tpd_disconnect,
95 .detect = tpd_detect,
96 .register_hpd_cb = tpd_register_hpd_cb,
97 .unregister_hpd_cb = tpd_unregister_hpd_cb,
98 };
99
100 static irqreturn_t tpd_hpd_isr(int irq, void *data)
101 {
102 struct panel_drv_data *ddata = data;
103
104 mutex_lock(&ddata->hpd_lock);
105 if (ddata->hpd_cb) {
106 enum drm_connector_status status;
107
108 if (tpd_detect(&ddata->dssdev))
109 status = connector_status_connected;
110 else
111 status = connector_status_disconnected;
112
113 ddata->hpd_cb(ddata->hpd_cb_data, status);
114 }
115 mutex_unlock(&ddata->hpd_lock);
116
117 return IRQ_HANDLED;
118 }
119
120 static int tpd_probe(struct platform_device *pdev)
121 {
122 struct omap_dss_device *dssdev;
123 struct panel_drv_data *ddata;
124 int r;
125 struct gpio_desc *gpio;
126
127 ddata = devm_kzalloc(&pdev->dev, sizeof(*ddata), GFP_KERNEL);
128 if (!ddata)
129 return -ENOMEM;
130
131 platform_set_drvdata(pdev, ddata);
132
133 gpio = devm_gpiod_get_index_optional(&pdev->dev, NULL, 0,
134 GPIOD_OUT_LOW);
135 if (IS_ERR(gpio))
136 return PTR_ERR(gpio);
137
138 ddata->ct_cp_hpd_gpio = gpio;
139
140 gpio = devm_gpiod_get_index_optional(&pdev->dev, NULL, 1,
141 GPIOD_OUT_LOW);
142 if (IS_ERR(gpio))
143 return PTR_ERR(gpio);
144
145 ddata->ls_oe_gpio = gpio;
146
147 gpio = devm_gpiod_get_index(&pdev->dev, NULL, 2,
148 GPIOD_IN);
149 if (IS_ERR(gpio))
150 return PTR_ERR(gpio);
151
152 ddata->hpd_gpio = gpio;
153
154 mutex_init(&ddata->hpd_lock);
155
156 r = devm_request_threaded_irq(&pdev->dev, gpiod_to_irq(ddata->hpd_gpio),
157 NULL, tpd_hpd_isr,
158 IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
159 "tpd12s015 hpd", ddata);
160 if (r)
161 return r;
162
163 dssdev = &ddata->dssdev;
164 dssdev->ops = &tpd_ops;
165 dssdev->dev = &pdev->dev;
166 dssdev->type = OMAP_DISPLAY_TYPE_HDMI;
167 dssdev->owner = THIS_MODULE;
168 dssdev->of_ports = BIT(1) | BIT(0);
169 dssdev->ops_flags = OMAP_DSS_DEVICE_OP_DETECT
170 | OMAP_DSS_DEVICE_OP_HPD;
171
172 dssdev->next = omapdss_of_find_connected_device(pdev->dev.of_node, 1);
173 if (IS_ERR(dssdev->next)) {
174 if (PTR_ERR(dssdev->next) != -EPROBE_DEFER)
175 dev_err(&pdev->dev, "failed to find video sink\n");
176 return PTR_ERR(dssdev->next);
177 }
178
179 omapdss_device_register(dssdev);
180
181 return 0;
182 }
183
184 static int __exit tpd_remove(struct platform_device *pdev)
185 {
186 struct panel_drv_data *ddata = platform_get_drvdata(pdev);
187 struct omap_dss_device *dssdev = &ddata->dssdev;
188
189 if (dssdev->next)
190 omapdss_device_put(dssdev->next);
191 omapdss_device_unregister(&ddata->dssdev);
192
193 return 0;
194 }
195
196 static const struct of_device_id tpd_of_match[] = {
197 { .compatible = "omapdss,ti,tpd12s015", },
198 {},
199 };
200
201 MODULE_DEVICE_TABLE(of, tpd_of_match);
202
203 static struct platform_driver tpd_driver = {
204 .probe = tpd_probe,
205 .remove = __exit_p(tpd_remove),
206 .driver = {
207 .name = "tpd12s015",
208 .of_match_table = tpd_of_match,
209 .suppress_bind_attrs = true,
210 },
211 };
212
213 module_platform_driver(tpd_driver);
214
215 MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@ti.com>");
216 MODULE_DESCRIPTION("TPD12S015 driver");
217 MODULE_LICENSE("GPL");