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/*
* Generic DVI monitor
*
* Copyright (C) 2012 Texas Instruments
*
* Contacts: Tomi Valkeinen <tomi.valkeinen@ti.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <video/display.h>
#include <video/panel-dvi.h>
struct panel_data {
struct display_entity entity;
struct video_source *in;
};
#define to_panel(p) container_of(p, struct panel_data, entity)
static int panel_dvi_set_state(struct display_entity *entity,
enum display_entity_state state)
{
struct panel_data *data = to_panel(entity);
struct video_source *in = data->in;
switch (state) {
case DISPLAY_ENTITY_STATE_OFF:
case DISPLAY_ENTITY_STATE_STANDBY:
in->common_ops->set_stream(in, DISPLAY_ENTITY_STREAM_STOPPED);
break;
case DISPLAY_ENTITY_STATE_ON:
in->common_ops->set_stream(in, DISPLAY_ENTITY_STREAM_CONTINUOUS);
break;
}
return 0;
}
static const struct videomode vga_mode = {
.pixelclock = 23500,
.hactive = 640,
.hfront_porch = 48,
.hback_porch = 80,
.hsync_len = 32,
.vactive = 480,
.vfront_porch = 3,
.vback_porch = 7,
.vsync_len = 4,
.hah = true,
.vah = true,
.de = true,
};
static int panel_dvi_get_modes(struct display_entity *entity,
const struct videomode **modes)
{
//struct panel_data *data = to_panel(entity);
*modes = &vga_mode;
return 1;
}
static int panel_dvi_get_size(struct display_entity *entity,
unsigned int *width, unsigned int *height)
{
//struct panel_data *data = to_panel(entity);
*width = 10;
*height = 10;
return 0;
}
static const struct display_entity_control_ops panel_dvi_control_ops = {
.set_state = panel_dvi_set_state,
.get_modes = panel_dvi_get_modes,
.get_size = panel_dvi_get_size,
};
static void panel_dvi_release(struct display_entity *entity)
{
printk("panel dvi release\n");
}
static int __devinit panel_dvi_probe(struct platform_device *pdev)
{
const struct panel_dvi_platform_data *pdata = pdev->dev.platform_data;
struct panel_data *data;
int ret;
if (pdata == NULL)
return -ENODEV;
data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
if (data == NULL)
return -ENOMEM;
/* setup input */
data->in = video_source_find(pdata->video_source);
if (data->in == NULL) {
printk("failed to get video source\n");
return -EINVAL;
}
/* setup default mode */
data->in->ops.dvi->set_videomode(data->in, &vga_mode);
/* setup panel entity */
data->entity.dev = &pdev->dev;
data->entity.release = panel_dvi_release;
data->entity.ops = &panel_dvi_control_ops;
ret = display_entity_register(&data->entity);
if (ret < 0) {
video_source_put(data->in);
return ret;
}
platform_set_drvdata(pdev, data);
return 0;
}
static int panel_dvi_remove(struct platform_device *pdev)
{
struct panel_data *data = platform_get_drvdata(pdev);
display_entity_unregister(&data->entity);
video_source_put(data->in);
return 0;
}
static const struct dev_pm_ops panel_dvi_dev_pm_ops = {
};
static struct platform_driver panel_dvi_driver = {
.probe = panel_dvi_probe,
.remove = panel_dvi_remove,
.driver = {
.name = "panel_dvi",
.owner = THIS_MODULE,
.pm = &panel_dvi_dev_pm_ops,
},
};
module_platform_driver(panel_dvi_driver);
MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@ti.com>");
MODULE_DESCRIPTION("DVI Monitor");
MODULE_LICENSE("GPL");
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