1
2
3
4
5
6
7
8
9
10
11
12#include <linux/gpio.h>
13#include <linux/module.h>
14#include <linux/platform_device.h>
15#include <linux/slab.h>
16#include <linux/of_gpio.h>
17
18#include <video/omapdss.h>
19#include <video/omap-panel-data.h>
20
21struct panel_drv_data {
22 struct omap_dss_device dssdev;
23 struct omap_dss_device *in;
24
25 int pd_gpio;
26 int data_lines;
27
28 struct omap_video_timings timings;
29};
30
31#define to_panel_data(x) container_of(x, struct panel_drv_data, dssdev)
32
33static int tfp410_connect(struct omap_dss_device *dssdev,
34 struct omap_dss_device *dst)
35{
36 struct panel_drv_data *ddata = to_panel_data(dssdev);
37 struct omap_dss_device *in = ddata->in;
38 int r;
39
40 if (omapdss_device_is_connected(dssdev))
41 return -EBUSY;
42
43 r = in->ops.dpi->connect(in, dssdev);
44 if (r)
45 return r;
46
47 dst->src = dssdev;
48 dssdev->dst = dst;
49
50 return 0;
51}
52
53static void tfp410_disconnect(struct omap_dss_device *dssdev,
54 struct omap_dss_device *dst)
55{
56 struct panel_drv_data *ddata = to_panel_data(dssdev);
57 struct omap_dss_device *in = ddata->in;
58
59 WARN_ON(!omapdss_device_is_connected(dssdev));
60 if (!omapdss_device_is_connected(dssdev))
61 return;
62
63 WARN_ON(dst != dssdev->dst);
64 if (dst != dssdev->dst)
65 return;
66
67 dst->src = NULL;
68 dssdev->dst = NULL;
69
70 in->ops.dpi->disconnect(in, &ddata->dssdev);
71}
72
73static int tfp410_enable(struct omap_dss_device *dssdev)
74{
75 struct panel_drv_data *ddata = to_panel_data(dssdev);
76 struct omap_dss_device *in = ddata->in;
77 int r;
78
79 if (!omapdss_device_is_connected(dssdev))
80 return -ENODEV;
81
82 if (omapdss_device_is_enabled(dssdev))
83 return 0;
84
85 in->ops.dpi->set_timings(in, &ddata->timings);
86 if (ddata->data_lines)
87 in->ops.dpi->set_data_lines(in, ddata->data_lines);
88
89 r = in->ops.dpi->enable(in);
90 if (r)
91 return r;
92
93 if (gpio_is_valid(ddata->pd_gpio))
94 gpio_set_value_cansleep(ddata->pd_gpio, 1);
95
96 dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
97
98 return 0;
99}
100
101static void tfp410_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 if (!omapdss_device_is_enabled(dssdev))
107 return;
108
109 if (gpio_is_valid(ddata->pd_gpio))
110 gpio_set_value_cansleep(ddata->pd_gpio, 0);
111
112 in->ops.dpi->disable(in);
113
114 dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
115}
116
117static void tfp410_fix_timings(struct omap_video_timings *timings)
118{
119 timings->data_pclk_edge = OMAPDSS_DRIVE_SIG_RISING_EDGE;
120 timings->sync_pclk_edge = OMAPDSS_DRIVE_SIG_RISING_EDGE;
121 timings->de_level = OMAPDSS_SIG_ACTIVE_HIGH;
122}
123
124static void tfp410_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 tfp410_fix_timings(timings);
131
132 ddata->timings = *timings;
133 dssdev->panel.timings = *timings;
134
135 in->ops.dpi->set_timings(in, timings);
136}
137
138static void tfp410_get_timings(struct omap_dss_device *dssdev,
139 struct omap_video_timings *timings)
140{
141 struct panel_drv_data *ddata = to_panel_data(dssdev);
142
143 *timings = ddata->timings;
144}
145
146static int tfp410_check_timings(struct omap_dss_device *dssdev,
147 struct omap_video_timings *timings)
148{
149 struct panel_drv_data *ddata = to_panel_data(dssdev);
150 struct omap_dss_device *in = ddata->in;
151
152 tfp410_fix_timings(timings);
153
154 return in->ops.dpi->check_timings(in, timings);
155}
156
157static const struct omapdss_dvi_ops tfp410_dvi_ops = {
158 .connect = tfp410_connect,
159 .disconnect = tfp410_disconnect,
160
161 .enable = tfp410_enable,
162 .disable = tfp410_disable,
163
164 .check_timings = tfp410_check_timings,
165 .set_timings = tfp410_set_timings,
166 .get_timings = tfp410_get_timings,
167};
168
169static int tfp410_probe_of(struct platform_device *pdev)
170{
171 struct panel_drv_data *ddata = platform_get_drvdata(pdev);
172 struct device_node *node = pdev->dev.of_node;
173 struct omap_dss_device *in;
174 int gpio;
175
176 gpio = of_get_named_gpio(node, "powerdown-gpios", 0);
177
178 if (gpio_is_valid(gpio) || gpio == -ENOENT) {
179 ddata->pd_gpio = gpio;
180 } else {
181 dev_err(&pdev->dev, "failed to parse PD gpio\n");
182 return gpio;
183 }
184
185 in = omapdss_of_find_source_for_first_ep(node);
186 if (IS_ERR(in)) {
187 dev_err(&pdev->dev, "failed to find video source\n");
188 return PTR_ERR(in);
189 }
190
191 ddata->in = in;
192
193 return 0;
194}
195
196static int tfp410_probe(struct platform_device *pdev)
197{
198 struct panel_drv_data *ddata;
199 struct omap_dss_device *dssdev;
200 int r;
201
202 ddata = devm_kzalloc(&pdev->dev, sizeof(*ddata), GFP_KERNEL);
203 if (!ddata)
204 return -ENOMEM;
205
206 platform_set_drvdata(pdev, ddata);
207
208 if (!pdev->dev.of_node)
209 return -ENODEV;
210
211 r = tfp410_probe_of(pdev);
212 if (r)
213 return r;
214
215 if (gpio_is_valid(ddata->pd_gpio)) {
216 r = devm_gpio_request_one(&pdev->dev, ddata->pd_gpio,
217 GPIOF_OUT_INIT_LOW, "tfp410 PD");
218 if (r) {
219 dev_err(&pdev->dev, "Failed to request PD GPIO %d\n",
220 ddata->pd_gpio);
221 goto err_gpio;
222 }
223 }
224
225 dssdev = &ddata->dssdev;
226 dssdev->ops.dvi = &tfp410_dvi_ops;
227 dssdev->dev = &pdev->dev;
228 dssdev->type = OMAP_DISPLAY_TYPE_DPI;
229 dssdev->output_type = OMAP_DISPLAY_TYPE_DVI;
230 dssdev->owner = THIS_MODULE;
231 dssdev->phy.dpi.data_lines = ddata->data_lines;
232 dssdev->port_num = 1;
233
234 r = omapdss_register_output(dssdev);
235 if (r) {
236 dev_err(&pdev->dev, "Failed to register output\n");
237 goto err_reg;
238 }
239
240 return 0;
241err_reg:
242err_gpio:
243 omap_dss_put_device(ddata->in);
244 return r;
245}
246
247static int __exit tfp410_remove(struct platform_device *pdev)
248{
249 struct panel_drv_data *ddata = platform_get_drvdata(pdev);
250 struct omap_dss_device *dssdev = &ddata->dssdev;
251 struct omap_dss_device *in = ddata->in;
252
253 omapdss_unregister_output(&ddata->dssdev);
254
255 WARN_ON(omapdss_device_is_enabled(dssdev));
256 if (omapdss_device_is_enabled(dssdev))
257 tfp410_disable(dssdev);
258
259 WARN_ON(omapdss_device_is_connected(dssdev));
260 if (omapdss_device_is_connected(dssdev))
261 tfp410_disconnect(dssdev, dssdev->dst);
262
263 omap_dss_put_device(in);
264
265 return 0;
266}
267
268static const struct of_device_id tfp410_of_match[] = {
269 { .compatible = "omapdss,ti,tfp410", },
270 {},
271};
272
273MODULE_DEVICE_TABLE(of, tfp410_of_match);
274
275static struct platform_driver tfp410_driver = {
276 .probe = tfp410_probe,
277 .remove = __exit_p(tfp410_remove),
278 .driver = {
279 .name = "tfp410",
280 .of_match_table = tfp410_of_match,
281 .suppress_bind_attrs = true,
282 },
283};
284
285module_platform_driver(tfp410_driver);
286
287MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@ti.com>");
288MODULE_DESCRIPTION("TFP410 DPI to DVI encoder driver");
289MODULE_LICENSE("GPL");
290
