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9#include <linux/gpio.h>
10#include <linux/module.h>
11#include <linux/platform_device.h>
12#include <linux/slab.h>
13#include <linux/of_gpio.h>
14
15#include <video/omapfb_dss.h>
16
17struct panel_drv_data {
18 struct omap_dss_device dssdev;
19 struct omap_dss_device *in;
20
21 int pd_gpio;
22 int data_lines;
23
24 struct omap_video_timings timings;
25};
26
27#define to_panel_data(x) container_of(x, struct panel_drv_data, dssdev)
28
29static int tfp410_connect(struct omap_dss_device *dssdev,
30 struct omap_dss_device *dst)
31{
32 struct panel_drv_data *ddata = to_panel_data(dssdev);
33 struct omap_dss_device *in = ddata->in;
34 int r;
35
36 if (omapdss_device_is_connected(dssdev))
37 return -EBUSY;
38
39 r = in->ops.dpi->connect(in, dssdev);
40 if (r)
41 return r;
42
43 dst->src = dssdev;
44 dssdev->dst = dst;
45
46 return 0;
47}
48
49static void tfp410_disconnect(struct omap_dss_device *dssdev,
50 struct omap_dss_device *dst)
51{
52 struct panel_drv_data *ddata = to_panel_data(dssdev);
53 struct omap_dss_device *in = ddata->in;
54
55 WARN_ON(!omapdss_device_is_connected(dssdev));
56 if (!omapdss_device_is_connected(dssdev))
57 return;
58
59 WARN_ON(dst != dssdev->dst);
60 if (dst != dssdev->dst)
61 return;
62
63 dst->src = NULL;
64 dssdev->dst = NULL;
65
66 in->ops.dpi->disconnect(in, &ddata->dssdev);
67}
68
69static int tfp410_enable(struct omap_dss_device *dssdev)
70{
71 struct panel_drv_data *ddata = to_panel_data(dssdev);
72 struct omap_dss_device *in = ddata->in;
73 int r;
74
75 if (!omapdss_device_is_connected(dssdev))
76 return -ENODEV;
77
78 if (omapdss_device_is_enabled(dssdev))
79 return 0;
80
81 in->ops.dpi->set_timings(in, &ddata->timings);
82 if (ddata->data_lines)
83 in->ops.dpi->set_data_lines(in, ddata->data_lines);
84
85 r = in->ops.dpi->enable(in);
86 if (r)
87 return r;
88
89 if (gpio_is_valid(ddata->pd_gpio))
90 gpio_set_value_cansleep(ddata->pd_gpio, 1);
91
92 dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
93
94 return 0;
95}
96
97static void tfp410_disable(struct omap_dss_device *dssdev)
98{
99 struct panel_drv_data *ddata = to_panel_data(dssdev);
100 struct omap_dss_device *in = ddata->in;
101
102 if (!omapdss_device_is_enabled(dssdev))
103 return;
104
105 if (gpio_is_valid(ddata->pd_gpio))
106 gpio_set_value_cansleep(ddata->pd_gpio, 0);
107
108 in->ops.dpi->disable(in);
109
110 dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
111}
112
113static void tfp410_fix_timings(struct omap_video_timings *timings)
114{
115 timings->data_pclk_edge = OMAPDSS_DRIVE_SIG_RISING_EDGE;
116 timings->sync_pclk_edge = OMAPDSS_DRIVE_SIG_RISING_EDGE;
117 timings->de_level = OMAPDSS_SIG_ACTIVE_HIGH;
118}
119
120static void tfp410_set_timings(struct omap_dss_device *dssdev,
121 struct omap_video_timings *timings)
122{
123 struct panel_drv_data *ddata = to_panel_data(dssdev);
124 struct omap_dss_device *in = ddata->in;
125
126 tfp410_fix_timings(timings);
127
128 ddata->timings = *timings;
129 dssdev->panel.timings = *timings;
130
131 in->ops.dpi->set_timings(in, timings);
132}
133
134static void tfp410_get_timings(struct omap_dss_device *dssdev,
135 struct omap_video_timings *timings)
136{
137 struct panel_drv_data *ddata = to_panel_data(dssdev);
138
139 *timings = ddata->timings;
140}
141
142static int tfp410_check_timings(struct omap_dss_device *dssdev,
143 struct omap_video_timings *timings)
144{
145 struct panel_drv_data *ddata = to_panel_data(dssdev);
146 struct omap_dss_device *in = ddata->in;
147
148 tfp410_fix_timings(timings);
149
150 return in->ops.dpi->check_timings(in, timings);
151}
152
153static const struct omapdss_dvi_ops tfp410_dvi_ops = {
154 .connect = tfp410_connect,
155 .disconnect = tfp410_disconnect,
156
157 .enable = tfp410_enable,
158 .disable = tfp410_disable,
159
160 .check_timings = tfp410_check_timings,
161 .set_timings = tfp410_set_timings,
162 .get_timings = tfp410_get_timings,
163};
164
165static int tfp410_probe_of(struct platform_device *pdev)
166{
167 struct panel_drv_data *ddata = platform_get_drvdata(pdev);
168 struct device_node *node = pdev->dev.of_node;
169 struct omap_dss_device *in;
170 int gpio;
171
172 gpio = of_get_named_gpio(node, "powerdown-gpios", 0);
173
174 if (gpio_is_valid(gpio) || gpio == -ENOENT) {
175 ddata->pd_gpio = gpio;
176 } else {
177 dev_err(&pdev->dev, "failed to parse PD gpio\n");
178 return gpio;
179 }
180
181 in = omapdss_of_find_source_for_first_ep(node);
182 if (IS_ERR(in)) {
183 dev_err(&pdev->dev, "failed to find video source\n");
184 return PTR_ERR(in);
185 }
186
187 ddata->in = in;
188
189 return 0;
190}
191
192static int tfp410_probe(struct platform_device *pdev)
193{
194 struct panel_drv_data *ddata;
195 struct omap_dss_device *dssdev;
196 int r;
197
198 if (!pdev->dev.of_node)
199 return -ENODEV;
200
201 ddata = devm_kzalloc(&pdev->dev, sizeof(*ddata), GFP_KERNEL);
202 if (!ddata)
203 return -ENOMEM;
204
205 platform_set_drvdata(pdev, ddata);
206
207 r = tfp410_probe_of(pdev);
208 if (r)
209 return r;
210
211 if (gpio_is_valid(ddata->pd_gpio)) {
212 r = devm_gpio_request_one(&pdev->dev, ddata->pd_gpio,
213 GPIOF_OUT_INIT_LOW, "tfp410 PD");
214 if (r) {
215 dev_err(&pdev->dev, "Failed to request PD GPIO %d\n",
216 ddata->pd_gpio);
217 goto err_gpio;
218 }
219 }
220
221 dssdev = &ddata->dssdev;
222 dssdev->ops.dvi = &tfp410_dvi_ops;
223 dssdev->dev = &pdev->dev;
224 dssdev->type = OMAP_DISPLAY_TYPE_DPI;
225 dssdev->output_type = OMAP_DISPLAY_TYPE_DVI;
226 dssdev->owner = THIS_MODULE;
227 dssdev->phy.dpi.data_lines = ddata->data_lines;
228 dssdev->port_num = 1;
229
230 r = omapdss_register_output(dssdev);
231 if (r) {
232 dev_err(&pdev->dev, "Failed to register output\n");
233 goto err_reg;
234 }
235
236 return 0;
237err_reg:
238err_gpio:
239 omap_dss_put_device(ddata->in);
240 return r;
241}
242
243static int __exit tfp410_remove(struct platform_device *pdev)
244{
245 struct panel_drv_data *ddata = platform_get_drvdata(pdev);
246 struct omap_dss_device *dssdev = &ddata->dssdev;
247 struct omap_dss_device *in = ddata->in;
248
249 omapdss_unregister_output(&ddata->dssdev);
250
251 WARN_ON(omapdss_device_is_enabled(dssdev));
252 if (omapdss_device_is_enabled(dssdev))
253 tfp410_disable(dssdev);
254
255 WARN_ON(omapdss_device_is_connected(dssdev));
256 if (omapdss_device_is_connected(dssdev))
257 tfp410_disconnect(dssdev, dssdev->dst);
258
259 omap_dss_put_device(in);
260
261 return 0;
262}
263
264static const struct of_device_id tfp410_of_match[] = {
265 { .compatible = "omapdss,ti,tfp410", },
266 {},
267};
268
269MODULE_DEVICE_TABLE(of, tfp410_of_match);
270
271static struct platform_driver tfp410_driver = {
272 .probe = tfp410_probe,
273 .remove = __exit_p(tfp410_remove),
274 .driver = {
275 .name = "tfp410",
276 .of_match_table = tfp410_of_match,
277 .suppress_bind_attrs = true,
278 },
279};
280
281module_platform_driver(tfp410_driver);
282
283MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@ti.com>");
284MODULE_DESCRIPTION("TFP410 DPI to DVI encoder driver");
285MODULE_LICENSE("GPL");
286
