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Marek Belisko0e878732014-12-03 22:33:20 +01001/*
2 * OPA362 analog video amplifier with output/power control
3 *
4 * Copyright (C) 2014 Golden Delicious Computers
5 * Author: H. Nikolaus Schaller <hns@goldelico.com>
6 *
7 * based on encoder-tfp410
8 *
Andrew F. Davisbb5cdf82017-12-05 14:29:31 -06009 * Copyright (C) 2013 Texas Instruments Incorporated - http://www.ti.com/
Marek Belisko0e878732014-12-03 22:33:20 +010010 * Author: Tomi Valkeinen <tomi.valkeinen@ti.com>
11 *
12 * This program is free software; you can redistribute it and/or modify it
13 * under the terms of the GNU General Public License version 2 as published by
14 * the Free Software Foundation.
15 */
16
Tomi Valkeinend9e32ec2016-03-18 09:02:18 +020017#include <linux/gpio/consumer.h>
Marek Belisko0e878732014-12-03 22:33:20 +010018#include <linux/module.h>
19#include <linux/platform_device.h>
20#include <linux/slab.h>
Marek Belisko0e878732014-12-03 22:33:20 +010021
Peter Ujfalusi32043da2016-05-27 14:40:49 +030022#include "../dss/omapdss.h"
Marek Belisko0e878732014-12-03 22:33:20 +010023
24struct panel_drv_data {
25 struct omap_dss_device dssdev;
Marek Belisko0e878732014-12-03 22:33:20 +010026
27 struct gpio_desc *enable_gpio;
28
Peter Ujfalusida11bbbb2016-09-22 14:07:04 +030029 struct videomode vm;
Marek Belisko0e878732014-12-03 22:33:20 +010030};
31
32#define to_panel_data(x) container_of(x, struct panel_drv_data, dssdev)
33
34static int opa362_connect(struct omap_dss_device *dssdev,
35 struct omap_dss_device *dst)
36{
Laurent Pinchart7269fde2018-02-28 17:30:30 +020037 struct omap_dss_device *src;
Marek Belisko0e878732014-12-03 22:33:20 +010038 int r;
39
Laurent Pincharteaaedaf2018-03-02 21:11:06 +020040 src = omapdss_of_find_connected_device(dssdev->dev->of_node, 0);
Laurent Pinchart7269fde2018-02-28 17:30:30 +020041 if (IS_ERR(src)) {
Laurent Pincharte28cea02018-02-11 15:07:41 +020042 dev_err(dssdev->dev, "failed to find video source\n");
Laurent Pinchart7269fde2018-02-28 17:30:30 +020043 return PTR_ERR(src);
Laurent Pincharte28cea02018-02-11 15:07:41 +020044 }
45
Laurent Pinchartf324b272018-03-02 02:54:16 +020046 r = omapdss_device_connect(dssdev->dss, src, dssdev);
Laurent Pincharte28cea02018-02-11 15:07:41 +020047 if (r) {
Laurent Pinchartc1dfe722018-03-02 02:43:45 +020048 omapdss_device_put(src);
Marek Belisko0e878732014-12-03 22:33:20 +010049 return r;
Laurent Pincharte28cea02018-02-11 15:07:41 +020050 }
Marek Belisko0e878732014-12-03 22:33:20 +010051
Marek Belisko0e878732014-12-03 22:33:20 +010052 return 0;
53}
54
55static void opa362_disconnect(struct omap_dss_device *dssdev,
56 struct omap_dss_device *dst)
57{
58 struct panel_drv_data *ddata = to_panel_data(dssdev);
Laurent Pinchart7269fde2018-02-28 17:30:30 +020059 struct omap_dss_device *src = dssdev->src;
Marek Belisko0e878732014-12-03 22:33:20 +010060
Laurent Pinchart7269fde2018-02-28 17:30:30 +020061 omapdss_device_disconnect(src, &ddata->dssdev);
Laurent Pincharte28cea02018-02-11 15:07:41 +020062
Laurent Pinchartc1dfe722018-03-02 02:43:45 +020063 omapdss_device_put(src);
Marek Belisko0e878732014-12-03 22:33:20 +010064}
65
66static int opa362_enable(struct omap_dss_device *dssdev)
67{
68 struct panel_drv_data *ddata = to_panel_data(dssdev);
Laurent Pinchart7269fde2018-02-28 17:30:30 +020069 struct omap_dss_device *src = dssdev->src;
Marek Belisko0e878732014-12-03 22:33:20 +010070 int r;
71
72 dev_dbg(dssdev->dev, "enable\n");
73
74 if (!omapdss_device_is_connected(dssdev))
75 return -ENODEV;
76
77 if (omapdss_device_is_enabled(dssdev))
78 return 0;
79
Laurent Pinchart7269fde2018-02-28 17:30:30 +020080 src->ops->set_timings(src, &ddata->vm);
Marek Belisko0e878732014-12-03 22:33:20 +010081
Laurent Pinchart7269fde2018-02-28 17:30:30 +020082 r = src->ops->enable(src);
Marek Belisko0e878732014-12-03 22:33:20 +010083 if (r)
84 return r;
85
86 if (ddata->enable_gpio)
87 gpiod_set_value_cansleep(ddata->enable_gpio, 1);
88
89 dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
90
91 return 0;
92}
93
94static void opa362_disable(struct omap_dss_device *dssdev)
95{
96 struct panel_drv_data *ddata = to_panel_data(dssdev);
Laurent Pinchart7269fde2018-02-28 17:30:30 +020097 struct omap_dss_device *src = dssdev->src;
Marek Belisko0e878732014-12-03 22:33:20 +010098
99 dev_dbg(dssdev->dev, "disable\n");
100
101 if (!omapdss_device_is_enabled(dssdev))
102 return;
103
104 if (ddata->enable_gpio)
105 gpiod_set_value_cansleep(ddata->enable_gpio, 0);
106
Laurent Pinchart7269fde2018-02-28 17:30:30 +0200107 src->ops->disable(src);
Marek Belisko0e878732014-12-03 22:33:20 +0100108
109 dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
110}
111
112static void opa362_set_timings(struct omap_dss_device *dssdev,
Peter Ujfalusida11bbbb2016-09-22 14:07:04 +0300113 struct videomode *vm)
Marek Belisko0e878732014-12-03 22:33:20 +0100114{
115 struct panel_drv_data *ddata = to_panel_data(dssdev);
Laurent Pinchart7269fde2018-02-28 17:30:30 +0200116 struct omap_dss_device *src = dssdev->src;
Marek Belisko0e878732014-12-03 22:33:20 +0100117
118 dev_dbg(dssdev->dev, "set_timings\n");
119
Peter Ujfalusida11bbbb2016-09-22 14:07:04 +0300120 ddata->vm = *vm;
Marek Belisko0e878732014-12-03 22:33:20 +0100121
Laurent Pinchart7269fde2018-02-28 17:30:30 +0200122 src->ops->set_timings(src, vm);
Marek Belisko0e878732014-12-03 22:33:20 +0100123}
124
Marek Belisko0e878732014-12-03 22:33:20 +0100125static int opa362_check_timings(struct omap_dss_device *dssdev,
Peter Ujfalusida11bbbb2016-09-22 14:07:04 +0300126 struct videomode *vm)
Marek Belisko0e878732014-12-03 22:33:20 +0100127{
Laurent Pinchart7269fde2018-02-28 17:30:30 +0200128 struct omap_dss_device *src = dssdev->src;
Marek Belisko0e878732014-12-03 22:33:20 +0100129
130 dev_dbg(dssdev->dev, "check_timings\n");
131
Laurent Pinchart7269fde2018-02-28 17:30:30 +0200132 return src->ops->check_timings(src, vm);
Marek Belisko0e878732014-12-03 22:33:20 +0100133}
134
Laurent Pinchartb93109d2018-02-28 15:58:13 +0200135static const struct omap_dss_device_ops opa362_ops = {
Marek Belisko0e878732014-12-03 22:33:20 +0100136 .connect = opa362_connect,
137 .disconnect = opa362_disconnect,
Marek Belisko0e878732014-12-03 22:33:20 +0100138 .enable = opa362_enable,
139 .disable = opa362_disable,
Marek Belisko0e878732014-12-03 22:33:20 +0100140 .check_timings = opa362_check_timings,
141 .set_timings = opa362_set_timings,
Marek Belisko0e878732014-12-03 22:33:20 +0100142};
143
144static int opa362_probe(struct platform_device *pdev)
145{
Marek Belisko0e878732014-12-03 22:33:20 +0100146 struct panel_drv_data *ddata;
Laurent Pincharte28cea02018-02-11 15:07:41 +0200147 struct omap_dss_device *dssdev;
Marek Belisko0e878732014-12-03 22:33:20 +0100148 struct gpio_desc *gpio;
Marek Belisko0e878732014-12-03 22:33:20 +0100149
150 dev_dbg(&pdev->dev, "probe\n");
151
Marek Belisko0e878732014-12-03 22:33:20 +0100152 ddata = devm_kzalloc(&pdev->dev, sizeof(*ddata), GFP_KERNEL);
153 if (!ddata)
154 return -ENOMEM;
155
156 platform_set_drvdata(pdev, ddata);
157
Uwe Kleine-Königca8c67d2015-05-28 10:05:15 +0200158 gpio = devm_gpiod_get_optional(&pdev->dev, "enable", GPIOD_OUT_LOW);
159 if (IS_ERR(gpio))
160 return PTR_ERR(gpio);
Marek Belisko0e878732014-12-03 22:33:20 +0100161
162 ddata->enable_gpio = gpio;
163
Marek Belisko0e878732014-12-03 22:33:20 +0100164 dssdev = &ddata->dssdev;
Laurent Pinchartb93109d2018-02-28 15:58:13 +0200165 dssdev->ops = &opa362_ops;
Marek Belisko0e878732014-12-03 22:33:20 +0100166 dssdev->dev = &pdev->dev;
167 dssdev->type = OMAP_DISPLAY_TYPE_VENC;
168 dssdev->output_type = OMAP_DISPLAY_TYPE_VENC;
169 dssdev->owner = THIS_MODULE;
Laurent Pinchart4e20bda2018-03-04 21:49:28 +0200170 dssdev->of_ports = BIT(1) | BIT(0);
Marek Belisko0e878732014-12-03 22:33:20 +0100171
Laurent Pinchart27d62452018-03-02 22:13:06 +0200172 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
Laurent Pinchartde57e9d2018-03-02 01:25:32 +0200179 omapdss_device_register(dssdev);
Marek Belisko0e878732014-12-03 22:33:20 +0100180
181 return 0;
Marek Belisko0e878732014-12-03 22:33:20 +0100182}
183
184static int __exit opa362_remove(struct platform_device *pdev)
185{
186 struct panel_drv_data *ddata = platform_get_drvdata(pdev);
187 struct omap_dss_device *dssdev = &ddata->dssdev;
Marek Belisko0e878732014-12-03 22:33:20 +0100188
Laurent Pinchart27d62452018-03-02 22:13:06 +0200189 if (dssdev->next)
190 omapdss_device_put(dssdev->next);
Laurent Pinchartde57e9d2018-03-02 01:25:32 +0200191 omapdss_device_unregister(&ddata->dssdev);
Marek Belisko0e878732014-12-03 22:33:20 +0100192
193 WARN_ON(omapdss_device_is_enabled(dssdev));
194 if (omapdss_device_is_enabled(dssdev))
195 opa362_disable(dssdev);
196
197 WARN_ON(omapdss_device_is_connected(dssdev));
198 if (omapdss_device_is_connected(dssdev))
Laurent Pinchart73fc0ac2018-08-04 22:10:44 +0300199 omapdss_device_disconnect(dssdev, dssdev->dst);
Marek Belisko0e878732014-12-03 22:33:20 +0100200
Marek Belisko0e878732014-12-03 22:33:20 +0100201 return 0;
202}
203
204static const struct of_device_id opa362_of_match[] = {
205 { .compatible = "omapdss,ti,opa362", },
206 {},
207};
208MODULE_DEVICE_TABLE(of, opa362_of_match);
209
210static struct platform_driver opa362_driver = {
211 .probe = opa362_probe,
212 .remove = __exit_p(opa362_remove),
213 .driver = {
214 .name = "amplifier-opa362",
Marek Belisko0e878732014-12-03 22:33:20 +0100215 .of_match_table = opa362_of_match,
216 .suppress_bind_attrs = true,
217 },
218};
219
220module_platform_driver(opa362_driver);
221
222MODULE_AUTHOR("H. Nikolaus Schaller <hns@goldelico.com>");
223MODULE_DESCRIPTION("OPA362 analog video amplifier with output/power control");
224MODULE_LICENSE("GPL v2");