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1/*
2 * TFP410 DPI-to-DVI encoder driver
3 *
4 * Copyright (C) 2013 Texas Instruments
5 * Author: Tomi Valkeinen <tomi.valkeinen@ti.com>
6 *
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License version 2 as published by
9 * the Free Software Foundation.
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");
1/*
2 * TFP410 DPI-to-DVI encoder driver
3 *
4 * Copyright (C) 2013 Texas Instruments
5 * Author: Tomi Valkeinen <tomi.valkeinen@ti.com>
6 *
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License version 2 as published by
9 * the Free Software Foundation.
10 */
11
12#include <linux/gpio/consumer.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 "../dss/omapdss.h"
19
20struct panel_drv_data {
21 struct omap_dss_device dssdev;
22 struct omap_dss_device *in;
23
24 int pd_gpio;
25 int data_lines;
26
27 struct videomode vm;
28};
29
30#define to_panel_data(x) container_of(x, struct panel_drv_data, dssdev)
31
32static int tfp410_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 if (omapdss_device_is_connected(dssdev))
40 return -EBUSY;
41
42 r = in->ops.dpi->connect(in, dssdev);
43 if (r)
44 return r;
45
46 dst->src = dssdev;
47 dssdev->dst = dst;
48
49 return 0;
50}
51
52static void tfp410_disconnect(struct omap_dss_device *dssdev,
53 struct omap_dss_device *dst)
54{
55 struct panel_drv_data *ddata = to_panel_data(dssdev);
56 struct omap_dss_device *in = ddata->in;
57
58 WARN_ON(!omapdss_device_is_connected(dssdev));
59 if (!omapdss_device_is_connected(dssdev))
60 return;
61
62 WARN_ON(dst != dssdev->dst);
63 if (dst != dssdev->dst)
64 return;
65
66 dst->src = NULL;
67 dssdev->dst = NULL;
68
69 in->ops.dpi->disconnect(in, &ddata->dssdev);
70}
71
72static int tfp410_enable(struct omap_dss_device *dssdev)
73{
74 struct panel_drv_data *ddata = to_panel_data(dssdev);
75 struct omap_dss_device *in = ddata->in;
76 int r;
77
78 if (!omapdss_device_is_connected(dssdev))
79 return -ENODEV;
80
81 if (omapdss_device_is_enabled(dssdev))
82 return 0;
83
84 in->ops.dpi->set_timings(in, &ddata->vm);
85 if (ddata->data_lines)
86 in->ops.dpi->set_data_lines(in, ddata->data_lines);
87
88 r = in->ops.dpi->enable(in);
89 if (r)
90 return r;
91
92 if (gpio_is_valid(ddata->pd_gpio))
93 gpio_set_value_cansleep(ddata->pd_gpio, 1);
94
95 dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
96
97 return 0;
98}
99
100static void tfp410_disable(struct omap_dss_device *dssdev)
101{
102 struct panel_drv_data *ddata = to_panel_data(dssdev);
103 struct omap_dss_device *in = ddata->in;
104
105 if (!omapdss_device_is_enabled(dssdev))
106 return;
107
108 if (gpio_is_valid(ddata->pd_gpio))
109 gpio_set_value_cansleep(ddata->pd_gpio, 0);
110
111 in->ops.dpi->disable(in);
112
113 dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
114}
115
116static void tfp410_fix_timings(struct videomode *vm)
117{
118 vm->flags |= DISPLAY_FLAGS_DE_HIGH | DISPLAY_FLAGS_PIXDATA_POSEDGE |
119 DISPLAY_FLAGS_SYNC_POSEDGE;
120}
121
122static void tfp410_set_timings(struct omap_dss_device *dssdev,
123 struct videomode *vm)
124{
125 struct panel_drv_data *ddata = to_panel_data(dssdev);
126 struct omap_dss_device *in = ddata->in;
127
128 tfp410_fix_timings(vm);
129
130 ddata->vm = *vm;
131 dssdev->panel.vm = *vm;
132
133 in->ops.dpi->set_timings(in, vm);
134}
135
136static void tfp410_get_timings(struct omap_dss_device *dssdev,
137 struct videomode *vm)
138{
139 struct panel_drv_data *ddata = to_panel_data(dssdev);
140
141 *vm = ddata->vm;
142}
143
144static int tfp410_check_timings(struct omap_dss_device *dssdev,
145 struct videomode *vm)
146{
147 struct panel_drv_data *ddata = to_panel_data(dssdev);
148 struct omap_dss_device *in = ddata->in;
149
150 tfp410_fix_timings(vm);
151
152 return in->ops.dpi->check_timings(in, vm);
153}
154
155static const struct omapdss_dvi_ops tfp410_dvi_ops = {
156 .connect = tfp410_connect,
157 .disconnect = tfp410_disconnect,
158
159 .enable = tfp410_enable,
160 .disable = tfp410_disable,
161
162 .check_timings = tfp410_check_timings,
163 .set_timings = tfp410_set_timings,
164 .get_timings = tfp410_get_timings,
165};
166
167static int tfp410_probe_of(struct platform_device *pdev)
168{
169 struct panel_drv_data *ddata = platform_get_drvdata(pdev);
170 struct device_node *node = pdev->dev.of_node;
171 struct omap_dss_device *in;
172 int gpio;
173
174 gpio = of_get_named_gpio(node, "powerdown-gpios", 0);
175
176 if (gpio_is_valid(gpio) || gpio == -ENOENT) {
177 ddata->pd_gpio = gpio;
178 } else {
179 dev_err(&pdev->dev, "failed to parse PD gpio\n");
180 return gpio;
181 }
182
183 in = omapdss_of_find_source_for_first_ep(node);
184 if (IS_ERR(in)) {
185 dev_err(&pdev->dev, "failed to find video source\n");
186 return PTR_ERR(in);
187 }
188
189 ddata->in = in;
190
191 return 0;
192}
193
194static int tfp410_probe(struct platform_device *pdev)
195{
196 struct panel_drv_data *ddata;
197 struct omap_dss_device *dssdev;
198 int r;
199
200 ddata = devm_kzalloc(&pdev->dev, sizeof(*ddata), GFP_KERNEL);
201 if (!ddata)
202 return -ENOMEM;
203
204 platform_set_drvdata(pdev, ddata);
205
206 if (!pdev->dev.of_node)
207 return -ENODEV;
208
209 r = tfp410_probe_of(pdev);
210 if (r)
211 return r;
212
213 if (gpio_is_valid(ddata->pd_gpio)) {
214 r = devm_gpio_request_one(&pdev->dev, ddata->pd_gpio,
215 GPIOF_OUT_INIT_LOW, "tfp410 PD");
216 if (r) {
217 dev_err(&pdev->dev, "Failed to request PD GPIO %d\n",
218 ddata->pd_gpio);
219 goto err_gpio;
220 }
221 }
222
223 dssdev = &ddata->dssdev;
224 dssdev->ops.dvi = &tfp410_dvi_ops;
225 dssdev->dev = &pdev->dev;
226 dssdev->type = OMAP_DISPLAY_TYPE_DPI;
227 dssdev->output_type = OMAP_DISPLAY_TYPE_DVI;
228 dssdev->owner = THIS_MODULE;
229 dssdev->phy.dpi.data_lines = ddata->data_lines;
230 dssdev->port_num = 1;
231
232 r = omapdss_register_output(dssdev);
233 if (r) {
234 dev_err(&pdev->dev, "Failed to register output\n");
235 goto err_reg;
236 }
237
238 return 0;
239err_reg:
240err_gpio:
241 omap_dss_put_device(ddata->in);
242 return r;
243}
244
245static int __exit tfp410_remove(struct platform_device *pdev)
246{
247 struct panel_drv_data *ddata = platform_get_drvdata(pdev);
248 struct omap_dss_device *dssdev = &ddata->dssdev;
249 struct omap_dss_device *in = ddata->in;
250
251 omapdss_unregister_output(&ddata->dssdev);
252
253 WARN_ON(omapdss_device_is_enabled(dssdev));
254 if (omapdss_device_is_enabled(dssdev))
255 tfp410_disable(dssdev);
256
257 WARN_ON(omapdss_device_is_connected(dssdev));
258 if (omapdss_device_is_connected(dssdev))
259 tfp410_disconnect(dssdev, dssdev->dst);
260
261 omap_dss_put_device(in);
262
263 return 0;
264}
265
266static const struct of_device_id tfp410_of_match[] = {
267 { .compatible = "omapdss,ti,tfp410", },
268 {},
269};
270
271MODULE_DEVICE_TABLE(of, tfp410_of_match);
272
273static struct platform_driver tfp410_driver = {
274 .probe = tfp410_probe,
275 .remove = __exit_p(tfp410_remove),
276 .driver = {
277 .name = "tfp410",
278 .of_match_table = tfp410_of_match,
279 .suppress_bind_attrs = true,
280 },
281};
282
283module_platform_driver(tfp410_driver);
284
285MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@ti.com>");
286MODULE_DESCRIPTION("TFP410 DPI to DVI encoder driver");
287MODULE_LICENSE("GPL");