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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_pdata(struct platform_device *pdev)
170{
171 struct panel_drv_data *ddata = platform_get_drvdata(pdev);
172 struct encoder_tfp410_platform_data *pdata;
173 struct omap_dss_device *dssdev, *in;
174
175 pdata = dev_get_platdata(&pdev->dev);
176
177 ddata->pd_gpio = pdata->power_down_gpio;
178
179 ddata->data_lines = pdata->data_lines;
180
181 in = omap_dss_find_output(pdata->source);
182 if (in == NULL) {
183 dev_err(&pdev->dev, "Failed to find video source\n");
184 return -ENODEV;
185 }
186
187 ddata->in = in;
188
189 dssdev = &ddata->dssdev;
190 dssdev->name = pdata->name;
191
192 return 0;
193}
194
195static int tfp410_probe_of(struct platform_device *pdev)
196{
197 struct panel_drv_data *ddata = platform_get_drvdata(pdev);
198 struct device_node *node = pdev->dev.of_node;
199 struct omap_dss_device *in;
200 int gpio;
201
202 gpio = of_get_named_gpio(node, "powerdown-gpios", 0);
203
204 if (gpio_is_valid(gpio) || gpio == -ENOENT) {
205 ddata->pd_gpio = gpio;
206 } else {
207 dev_err(&pdev->dev, "failed to parse PD gpio\n");
208 return gpio;
209 }
210
211 in = omapdss_of_find_source_for_first_ep(node);
212 if (IS_ERR(in)) {
213 dev_err(&pdev->dev, "failed to find video source\n");
214 return PTR_ERR(in);
215 }
216
217 ddata->in = in;
218
219 return 0;
220}
221
222static int tfp410_probe(struct platform_device *pdev)
223{
224 struct panel_drv_data *ddata;
225 struct omap_dss_device *dssdev;
226 int r;
227
228 ddata = devm_kzalloc(&pdev->dev, sizeof(*ddata), GFP_KERNEL);
229 if (!ddata)
230 return -ENOMEM;
231
232 platform_set_drvdata(pdev, ddata);
233
234 if (dev_get_platdata(&pdev->dev)) {
235 r = tfp410_probe_pdata(pdev);
236 if (r)
237 return r;
238 } else if (pdev->dev.of_node) {
239 r = tfp410_probe_of(pdev);
240 if (r)
241 return r;
242 } else {
243 return -ENODEV;
244 }
245
246 if (gpio_is_valid(ddata->pd_gpio)) {
247 r = devm_gpio_request_one(&pdev->dev, ddata->pd_gpio,
248 GPIOF_OUT_INIT_LOW, "tfp410 PD");
249 if (r) {
250 dev_err(&pdev->dev, "Failed to request PD GPIO %d\n",
251 ddata->pd_gpio);
252 goto err_gpio;
253 }
254 }
255
256 dssdev = &ddata->dssdev;
257 dssdev->ops.dvi = &tfp410_dvi_ops;
258 dssdev->dev = &pdev->dev;
259 dssdev->type = OMAP_DISPLAY_TYPE_DPI;
260 dssdev->output_type = OMAP_DISPLAY_TYPE_DVI;
261 dssdev->owner = THIS_MODULE;
262 dssdev->phy.dpi.data_lines = ddata->data_lines;
263 dssdev->port_num = 1;
264
265 r = omapdss_register_output(dssdev);
266 if (r) {
267 dev_err(&pdev->dev, "Failed to register output\n");
268 goto err_reg;
269 }
270
271 return 0;
272err_reg:
273err_gpio:
274 omap_dss_put_device(ddata->in);
275 return r;
276}
277
278static int __exit tfp410_remove(struct platform_device *pdev)
279{
280 struct panel_drv_data *ddata = platform_get_drvdata(pdev);
281 struct omap_dss_device *dssdev = &ddata->dssdev;
282 struct omap_dss_device *in = ddata->in;
283
284 omapdss_unregister_output(&ddata->dssdev);
285
286 WARN_ON(omapdss_device_is_enabled(dssdev));
287 if (omapdss_device_is_enabled(dssdev))
288 tfp410_disable(dssdev);
289
290 WARN_ON(omapdss_device_is_connected(dssdev));
291 if (omapdss_device_is_connected(dssdev))
292 tfp410_disconnect(dssdev, dssdev->dst);
293
294 omap_dss_put_device(in);
295
296 return 0;
297}
298
299static const struct of_device_id tfp410_of_match[] = {
300 { .compatible = "omapdss,ti,tfp410", },
301 {},
302};
303
304MODULE_DEVICE_TABLE(of, tfp410_of_match);
305
306static struct platform_driver tfp410_driver = {
307 .probe = tfp410_probe,
308 .remove = __exit_p(tfp410_remove),
309 .driver = {
310 .name = "tfp410",
311 .of_match_table = tfp410_of_match,
312 .suppress_bind_attrs = true,
313 },
314};
315
316module_platform_driver(tfp410_driver);
317
318MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@ti.com>");
319MODULE_DESCRIPTION("TFP410 DPI to DVI encoder driver");
320MODULE_LICENSE("GPL");
321
