Release 4.17 drivers/gpu/drm/omapdrm/displays/panel-dpi.c

/*
 * Generic MIPI DPI Panel Driver
 *
 * Copyright (C) 2013 Texas Instruments Incorporated - http://www.ti.com/
 * Author: 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/gpio/consumer.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/of.h>
#include <linux/regulator/consumer.h>
#include <linux/backlight.h>

#include <video/of_display_timing.h>

#include "../dss/omapdss.h"


struct panel_drv_data {
	
struct omap_dss_device dssdev;
	
struct omap_dss_device *in;

	
struct videomode vm;

	
struct backlight_device *backlight;

	
struct gpio_desc *enable_gpio;
	
struct regulator *vcc_supply;
};


#define to_panel_data(p) container_of(p, struct panel_drv_data, dssdev)



static int panel_dpi_connect(struct omap_dss_device *dssdev)
{
	struct panel_drv_data *ddata = to_panel_data(dssdev);
	struct omap_dss_device *in;
	int r;

	if (omapdss_device_is_connected(dssdev))
		return 0;

	in = omapdss_of_find_source_for_first_ep(dssdev->dev->of_node);
	if (IS_ERR(in)) {
		dev_err(dssdev->dev, "failed to find video source\n");
		return PTR_ERR(in);
	}

	r = in->ops.dpi->connect(in, dssdev);
	if (r) {
		omap_dss_put_device(in);
		return r;
	}

	ddata->in = in;
	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Tomi Valkeinen
64
57.14%
1
50.00%
Laurent Pinchart
48
42.86%
1
50.00%
Total
112
100.00%
2
100.00%



static void panel_dpi_disconnect(struct omap_dss_device *dssdev)
{
	struct panel_drv_data *ddata = to_panel_data(dssdev);
	struct omap_dss_device *in = ddata->in;

	if (!omapdss_device_is_connected(dssdev))
		return;

	in->ops.dpi->disconnect(in, dssdev);

	omap_dss_put_device(in);
	ddata->in = NULL;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Tomi Valkeinen
52
82.54%
1
50.00%
Laurent Pinchart
11
17.46%
1
50.00%
Total
63
100.00%
2
100.00%



static int panel_dpi_enable(struct omap_dss_device *dssdev)
{
	struct panel_drv_data *ddata = to_panel_data(dssdev);
	struct omap_dss_device *in = ddata->in;
	int r;

	if (!omapdss_device_is_connected(dssdev))
		return -ENODEV;

	if (omapdss_device_is_enabled(dssdev))
		return 0;

	in->ops.dpi->set_timings(in, &ddata->vm);

	r = in->ops.dpi->enable(in);
	if (r)
		return r;

	r = regulator_enable(ddata->vcc_supply);
	if (r) {
		in->ops.dpi->disable(in);
		return r;
	}

	gpiod_set_value_cansleep(ddata->enable_gpio, 1);
	backlight_enable(ddata->backlight);

	dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;

	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Tomi Valkeinen
108
74.48%
2
33.33%
Uwe Kleine-König
29
20.00%
1
16.67%
Peter Ujfalusi
7
4.83%
2
33.33%
Meghana Madhyastha
1
0.69%
1
16.67%
Total
145
100.00%
6
100.00%



static void panel_dpi_disable(struct omap_dss_device *dssdev)
{
	struct panel_drv_data *ddata = to_panel_data(dssdev);
	struct omap_dss_device *in = ddata->in;

	if (!omapdss_device_is_enabled(dssdev))
		return;

	backlight_disable(ddata->backlight);

	gpiod_set_value_cansleep(ddata->enable_gpio, 0);
	regulator_disable(ddata->vcc_supply);

	in->ops.dpi->disable(in);

	dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Tomi Valkeinen
63
79.75%
1
20.00%
Uwe Kleine-König
9
11.39%
2
40.00%
Peter Ujfalusi
6
7.59%
1
20.00%
Meghana Madhyastha
1
1.27%
1
20.00%
Total
79
100.00%
5
100.00%



static void panel_dpi_set_timings(struct omap_dss_device *dssdev,
				  struct videomode *vm)
{
	struct panel_drv_data *ddata = to_panel_data(dssdev);
	struct omap_dss_device *in = ddata->in;

	ddata->vm = *vm;
	dssdev->panel.vm = *vm;

	in->ops.dpi->set_timings(in, vm);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Tomi Valkeinen
57
89.06%
1
33.33%
Peter Ujfalusi
7
10.94%
2
66.67%
Total
64
100.00%
3
100.00%



static void panel_dpi_get_timings(struct omap_dss_device *dssdev,
				  struct videomode *vm)
{
	struct panel_drv_data *ddata = to_panel_data(dssdev);

	*vm = ddata->vm;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Tomi Valkeinen
29
87.88%
1
33.33%
Peter Ujfalusi
4
12.12%
2
66.67%
Total
33
100.00%
3
100.00%



static int panel_dpi_check_timings(struct omap_dss_device *dssdev,
				   struct videomode *vm)
{
	struct panel_drv_data *ddata = to_panel_data(dssdev);
	struct omap_dss_device *in = ddata->in;

	return in->ops.dpi->check_timings(in, vm);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Tomi Valkeinen
46
93.88%
1
33.33%
Peter Ujfalusi
3
6.12%
2
66.67%
Total
49
100.00%
3
100.00%


static struct omap_dss_driver panel_dpi_ops = {
	.connect	= panel_dpi_connect,
	.disconnect	= panel_dpi_disconnect,

	.enable		= panel_dpi_enable,
	.disable	= panel_dpi_disable,

	.set_timings	= panel_dpi_set_timings,
	.get_timings	= panel_dpi_get_timings,
	.check_timings	= panel_dpi_check_timings,
};



static int panel_dpi_probe_of(struct platform_device *pdev)
{
	struct panel_drv_data *ddata = platform_get_drvdata(pdev);
	struct device_node *node = pdev->dev.of_node;
	int r;
	struct display_timing timing;
	struct gpio_desc *gpio;

	gpio = devm_gpiod_get_optional(&pdev->dev, "enable", GPIOD_OUT_LOW);
	if (IS_ERR(gpio))
		return PTR_ERR(gpio);

	ddata->enable_gpio = gpio;

	/*
         * Many different panels are supported by this driver and there are
         * probably very different needs for their reset pins in regards to
         * timing and order relative to the enable gpio. So for now it's just
         * ensured that the reset line isn't active.
         */
	gpio = devm_gpiod_get_optional(&pdev->dev, "reset", GPIOD_OUT_LOW);
	if (IS_ERR(gpio))
		return PTR_ERR(gpio);

	ddata->vcc_supply = devm_regulator_get(&pdev->dev, "vcc");
	if (IS_ERR(ddata->vcc_supply))
		return PTR_ERR(ddata->vcc_supply);

	ddata->backlight = devm_of_find_backlight(&pdev->dev);

	if (IS_ERR(ddata->backlight))
		return PTR_ERR(ddata->backlight);

	r = of_get_display_timing(node, "panel-timing", &timing);
	if (r) {
		dev_err(&pdev->dev, "failed to get video timing\n");
		return r;
	}

	videomode_from_timing(&timing, &ddata->vm);

	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Tomi Valkeinen
117
55.71%
1
14.29%
Uwe Kleine-König
60
28.57%
3
42.86%
Meghana Madhyastha
17
8.10%
1
14.29%
Peter Ujfalusi
16
7.62%
2
28.57%
Total
210
100.00%
7
100.00%



static int panel_dpi_probe(struct platform_device *pdev)
{
	struct panel_drv_data *ddata;
	struct omap_dss_device *dssdev;
	int r;

	ddata = devm_kzalloc(&pdev->dev, sizeof(*ddata), GFP_KERNEL);
	if (ddata == NULL)
		return -ENOMEM;

	platform_set_drvdata(pdev, ddata);

	r = panel_dpi_probe_of(pdev);
	if (r)
		return r;

	dssdev = &ddata->dssdev;
	dssdev->dev = &pdev->dev;
	dssdev->driver = &panel_dpi_ops;
	dssdev->type = OMAP_DISPLAY_TYPE_DPI;
	dssdev->owner = THIS_MODULE;
	dssdev->panel.vm = ddata->vm;

	r = omapdss_register_display(dssdev);
	if (r) {
		dev_err(&pdev->dev, "Failed to register panel\n");
		return r;
	}

	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Tomi Valkeinen
142
96.60%
2
50.00%
Laurent Pinchart
3
2.04%
1
25.00%
Peter Ujfalusi
2
1.36%
1
25.00%
Total
147
100.00%
4
100.00%



static int __exit panel_dpi_remove(struct platform_device *pdev)
{
	struct panel_drv_data *ddata = platform_get_drvdata(pdev);
	struct omap_dss_device *dssdev = &ddata->dssdev;

	omapdss_unregister_display(dssdev);

	panel_dpi_disable(dssdev);
	panel_dpi_disconnect(dssdev);

	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Tomi Valkeinen
50
100.00%
1
100.00%
Total
50
100.00%
1
100.00%


static const struct of_device_id panel_dpi_of_match[] = {
	{ .compatible = "omapdss,panel-dpi", },
	{},
};

MODULE_DEVICE_TABLE(of, panel_dpi_of_match);


static struct platform_driver panel_dpi_driver = {
	.probe = panel_dpi_probe,
	.remove = __exit_p(panel_dpi_remove),
	.driver = {
		.name = "panel-dpi",
		.of_match_table = panel_dpi_of_match,
		.suppress_bind_attrs = true,
        },
};

module_platform_driver(panel_dpi_driver);

MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@ti.com>");
MODULE_DESCRIPTION("Generic MIPI DPI Panel Driver");
MODULE_LICENSE("GPL");
Overall Contributors
Person
Tokens
Prop
Commits
CommitProp
Tomi Valkeinen
902
78.64%
5
29.41%
Uwe Kleine-König
106
9.24%
4
23.53%
Laurent Pinchart
62
5.41%
1
5.88%
Peter Ujfalusi
57
4.97%
4
23.53%
Meghana Madhyastha
19
1.66%
2
11.76%
Andrew F. Davis
1
0.09%
1
5.88%
Total
1147
100.00%
17
100.00%
Directory: drivers/gpu/drm/omapdrm/displays

Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.