Commit 2773fefb authored by Tomi Valkeinen's avatar Tomi Valkeinen
Browse files

OMAPDSS: Add new TFP410 Encoder driver 



Add TFP410 DPI-to-DVI Encoder driver which uses the new DSS device
model and DSS ops.

Signed-off-by: default avatarTomi Valkeinen <tomi.valkeinen@ti.com>
parent deb16df8

drivers/video/omap2/Kconfig

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@@ -6,5 +6,6 @@ if ARCH_OMAP2PLUS 
source "drivers/video/omap2/dss/Kconfig"

source "drivers/video/omap2/omapfb/Kconfig"

source "drivers/video/omap2/displays/Kconfig"

source "drivers/video/omap2/displays-new/Kconfig"



endif

drivers/video/omap2/Makefile

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@@ -2,4 +2,5 @@ obj-$(CONFIG_OMAP2_VRFB) += vrfb.o 


obj-$(CONFIG_OMAP2_DSS) += dss/

obj-y += displays/

obj-y += displays-new/

obj-$(CONFIG_FB_OMAP2) += omapfb/

drivers/video/omap2/displays-new/Kconfig

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menu "OMAP Display Device Drivers"

        depends on OMAP2_DSS



config DISPLAY_ENCODER_TFP410

        tristate "TFP410 DPI to DVI Encoder"

	help

	  Driver for TFP410 DPI to DVI encoder.



endmenu

drivers/video/omap2/displays-new/Makefile

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obj-$(CONFIG_DISPLAY_ENCODER_TFP410) += encoder-tfp410.o

drivers/video/omap2/displays-new/encoder-tfp410.c

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/*

 * TFP410 DPI-to-DVI encoder driver

 *

 * Copyright (C) 2013 Texas Instruments

 * 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.h>

#include <linux/module.h>

#include <linux/platform_device.h>

#include <linux/slab.h>



#include <video/omapdss.h>

#include <video/omap-panel-data.h>



struct panel_drv_data {

	struct omap_dss_device dssdev;

	struct omap_dss_device *in;



	int pd_gpio;

	int data_lines;



	struct omap_video_timings timings;

};



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



static int tfp410_connect(struct omap_dss_device *dssdev,

		struct omap_dss_device *dst)

{

	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 -EBUSY;



	r = in->ops.dpi->connect(in, dssdev);

	if (r)

		return r;



	dst->output = dssdev;

	dssdev->device = dst;



	return 0;

}



static void tfp410_disconnect(struct omap_dss_device *dssdev,

		struct omap_dss_device *dst)

{

	struct panel_drv_data *ddata = to_panel_data(dssdev);

	struct omap_dss_device *in = ddata->in;



	WARN_ON(!omapdss_device_is_connected(dssdev));

	if (!omapdss_device_is_connected(dssdev))

		return;



	WARN_ON(dst != dssdev->device);

	if (dst != dssdev->device)

		return;



	dst->output = NULL;

	dssdev->device = NULL;



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

}



static int tfp410_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->timings);

	in->ops.dpi->set_data_lines(in, ddata->data_lines);



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

	if (r)

		return r;



	if (gpio_is_valid(ddata->pd_gpio))

		gpio_set_value_cansleep(ddata->pd_gpio, 1);



	dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;



	return 0;

}



static void tfp410_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;



	if (gpio_is_valid(ddata->pd_gpio))

		gpio_set_value_cansleep(ddata->pd_gpio, 0);



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



	dssdev->state = OMAP_DSS_DISPLAY_DISABLED;

}



static void tfp410_set_timings(struct omap_dss_device *dssdev,

		struct omap_video_timings *timings)

{

	struct panel_drv_data *ddata = to_panel_data(dssdev);

	struct omap_dss_device *in = ddata->in;



	ddata->timings = *timings;

	dssdev->panel.timings = *timings;



	in->ops.dpi->set_timings(in, timings);

}



static void tfp410_get_timings(struct omap_dss_device *dssdev,

		struct omap_video_timings *timings)

{

	struct panel_drv_data *ddata = to_panel_data(dssdev);



	*timings = ddata->timings;

}



static int tfp410_check_timings(struct omap_dss_device *dssdev,

		struct omap_video_timings *timings)

{

	struct panel_drv_data *ddata = to_panel_data(dssdev);

	struct omap_dss_device *in = ddata->in;



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

}



static const struct omapdss_dvi_ops tfp410_dvi_ops = {

	.connect	= tfp410_connect,

	.disconnect	= tfp410_disconnect,



	.enable		= tfp410_enable,

	.disable	= tfp410_disable,



	.check_timings	= tfp410_check_timings,

	.set_timings	= tfp410_set_timings,

	.get_timings	= tfp410_get_timings,

};



static int tfp410_probe_pdata(struct platform_device *pdev)

{

	struct panel_drv_data *ddata = platform_get_drvdata(pdev);

	struct encoder_tfp410_platform_data *pdata;

	struct omap_dss_device *dssdev, *in;



	pdata = dev_get_platdata(&pdev->dev);



	ddata->pd_gpio = pdata->power_down_gpio;



	ddata->data_lines = pdata->data_lines;



	in = omap_dss_find_output(pdata->source);

	if (in == NULL) {

		dev_err(&pdev->dev, "Failed to find video source\n");

		return -ENODEV;

	}



	ddata->in = in;



	dssdev = &ddata->dssdev;

	dssdev->name = pdata->name;



	return 0;

}



static int tfp410_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)

		return -ENOMEM;



	platform_set_drvdata(pdev, ddata);



	if (dev_get_platdata(&pdev->dev)) {

		r = tfp410_probe_pdata(pdev);

		if (r)

			return r;

	} else {

		return -ENODEV;

	}



	if (gpio_is_valid(ddata->pd_gpio)) {

		r = devm_gpio_request_one(&pdev->dev, ddata->pd_gpio,

				GPIOF_OUT_INIT_LOW, "tfp410 PD");

		if (r) {

			dev_err(&pdev->dev, "Failed to request PD GPIO %d\n",

					ddata->pd_gpio);

			goto err_gpio;

		}

	}



	dssdev = &ddata->dssdev;

	dssdev->ops.dvi = &tfp410_dvi_ops;

	dssdev->dev = &pdev->dev;

	dssdev->type = OMAP_DISPLAY_TYPE_DPI;

	dssdev->output_type = OMAP_DISPLAY_TYPE_DVI;

	dssdev->owner = THIS_MODULE;

	dssdev->phy.dpi.data_lines = ddata->data_lines;



	r = omapdss_register_output(dssdev);

	if (r) {

		dev_err(&pdev->dev, "Failed to register output\n");

		goto err_reg;

	}



	return 0;

err_reg:

err_gpio:

	omap_dss_put_device(ddata->in);

	return r;

}



static int __exit tfp410_remove(struct platform_device *pdev)

{

	struct panel_drv_data *ddata = platform_get_drvdata(pdev);

	struct omap_dss_device *dssdev = &ddata->dssdev;

	struct omap_dss_device *in = ddata->in;



	omapdss_unregister_output(&ddata->dssdev);



	WARN_ON(omapdss_device_is_enabled(dssdev));

	if (omapdss_device_is_enabled(dssdev))

		tfp410_disable(dssdev);



	WARN_ON(omapdss_device_is_connected(dssdev));

	if (omapdss_device_is_connected(dssdev))

		tfp410_disconnect(dssdev, dssdev->device);



	omap_dss_put_device(in);



	return 0;

}



static struct platform_driver tfp410_driver = {

	.probe	= tfp410_probe,

	.remove	= __exit_p(tfp410_remove),

	.driver	= {

		.name	= "tfp410",

		.owner	= THIS_MODULE,

	},

};



module_platform_driver(tfp410_driver);



MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@ti.com>");

MODULE_DESCRIPTION("TFP410 DPI to DVI encoder driver");

MODULE_LICENSE("GPL");