Commit 70be8323 authored by Mythri P K's avatar Mythri P K Committed by Tomi Valkeinen
Browse files

OMAP4: DSS2: HDMI: HDMI panel driver addition in the DSS 



The panel driver(hdmi_omap4_panel.c) in omap2/dss acts as a controller
to manage the enable and disable requests and synchronize audio and video.

Signed-off-by: default avatarMythri P K <mythripk@ti.com>
Signed-off-by: default avatarTomi Valkeinen <tomi.valkeinen@ti.com>
parent c3198a5e

drivers/video/omap2/dss/dss.h

+2 −0
Original line number Diff line number Diff line
@@ -477,6 +477,8 @@ void omapdss_hdmi_display_disable(struct omap_dss_device *dssdev); 
void omapdss_hdmi_display_set_timing(struct omap_dss_device *dssdev);

int omapdss_hdmi_display_check_timing(struct omap_dss_device *dssdev,

					struct omap_video_timings *timings);

int hdmi_panel_init(void);

void hdmi_panel_exit(void);



/* RFBI */

#ifdef CONFIG_OMAP2_DSS_RFBI

drivers/video/omap2/dss/hdmi_omap4_panel.c

0 → 100644
+222 −0
Original line number Diff line number Diff line 
/*

 * hdmi_omap4_panel.c

 *

 * HDMI library support functions for TI OMAP4 processors.

 *

 * Copyright (C) 2010-2011 Texas Instruments Incorporated - http://www.ti.com/

 * Authors:	Mythri P k <mythripk@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.

 *

 * This program is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for

 * more details.

 *

 * You should have received a copy of the GNU General Public License along with

 * this program.  If not, see <http://www.gnu.org/licenses/>.

 */



#include <linux/kernel.h>

#include <linux/err.h>

#include <linux/io.h>

#include <linux/mutex.h>

#include <linux/module.h>

#include <plat/display.h>



#include "dss.h"



static struct {

	struct mutex hdmi_lock;

} hdmi;





static int hdmi_panel_probe(struct omap_dss_device *dssdev)

{

	DSSDBG("ENTER hdmi_panel_probe\n");



	dssdev->panel.config = OMAP_DSS_LCD_TFT |

			OMAP_DSS_LCD_IVS | OMAP_DSS_LCD_IHS;



	/*

	 * Initialize the timings to 640 * 480

	 * This is only for framebuffer update not for TV timing setting

	 * Setting TV timing will be done only on enable

	 */

	dssdev->panel.timings.x_res = 640;

	dssdev->panel.timings.y_res = 480;



	DSSDBG("hdmi_panel_probe x_res= %d y_res = %d\n",

		dssdev->panel.timings.x_res,

		dssdev->panel.timings.y_res);

	return 0;

}



static void hdmi_panel_remove(struct omap_dss_device *dssdev)

{



}



static int hdmi_panel_enable(struct omap_dss_device *dssdev)

{

	int r = 0;

	DSSDBG("ENTER hdmi_panel_enable\n");



	mutex_lock(&hdmi.hdmi_lock);



	if (dssdev->state != OMAP_DSS_DISPLAY_DISABLED) {

		r = -EINVAL;

		goto err;

	}



	r = omapdss_hdmi_display_enable(dssdev);

	if (r) {

		DSSERR("failed to power on\n");

		goto err;

	}



	dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;



err:

	mutex_unlock(&hdmi.hdmi_lock);



	return r;

}



static void hdmi_panel_disable(struct omap_dss_device *dssdev)

{

	mutex_lock(&hdmi.hdmi_lock);



	if (dssdev->state == OMAP_DSS_DISPLAY_ACTIVE)

		omapdss_hdmi_display_disable(dssdev);



	dssdev->state = OMAP_DSS_DISPLAY_DISABLED;



	mutex_unlock(&hdmi.hdmi_lock);

}



static int hdmi_panel_suspend(struct omap_dss_device *dssdev)

{

	int r = 0;



	mutex_lock(&hdmi.hdmi_lock);



	if (dssdev->state != OMAP_DSS_DISPLAY_ACTIVE) {

		r = -EINVAL;

		goto err;

	}



	dssdev->state = OMAP_DSS_DISPLAY_SUSPENDED;



	omapdss_hdmi_display_disable(dssdev);



err:

	mutex_unlock(&hdmi.hdmi_lock);



	return r;

}



static int hdmi_panel_resume(struct omap_dss_device *dssdev)

{

	int r = 0;



	mutex_lock(&hdmi.hdmi_lock);



	if (dssdev->state != OMAP_DSS_DISPLAY_SUSPENDED) {

		r = -EINVAL;

		goto err;

	}



	r = omapdss_hdmi_display_enable(dssdev);

	if (r) {

		DSSERR("failed to power on\n");

		goto err;

	}



	dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;



err:

	mutex_unlock(&hdmi.hdmi_lock);



	return r;

}



static void hdmi_get_timings(struct omap_dss_device *dssdev,

			struct omap_video_timings *timings)

{

	mutex_lock(&hdmi.hdmi_lock);



	*timings = dssdev->panel.timings;



	mutex_unlock(&hdmi.hdmi_lock);

}



static void hdmi_set_timings(struct omap_dss_device *dssdev,

			struct omap_video_timings *timings)

{

	DSSDBG("hdmi_set_timings\n");



	mutex_lock(&hdmi.hdmi_lock);



	dssdev->panel.timings = *timings;



	if (dssdev->state == OMAP_DSS_DISPLAY_ACTIVE) {

		/* turn the hdmi off and on to get new timings to use */

		omapdss_hdmi_display_disable(dssdev);

		omapdss_hdmi_display_set_timing(dssdev);

	}



	mutex_unlock(&hdmi.hdmi_lock);

}



static int hdmi_check_timings(struct omap_dss_device *dssdev,

			struct omap_video_timings *timings)

{

	int r = 0;



	DSSDBG("hdmi_check_timings\n");



	mutex_lock(&hdmi.hdmi_lock);



	r = omapdss_hdmi_display_check_timing(dssdev, timings);

	if (r) {

		DSSERR("Timing cannot be applied\n");

		goto err;

	}

err:

	mutex_unlock(&hdmi.hdmi_lock);

	return r;

}



static struct omap_dss_driver hdmi_driver = {

	.probe		= hdmi_panel_probe,

	.remove		= hdmi_panel_remove,

	.enable		= hdmi_panel_enable,

	.disable	= hdmi_panel_disable,

	.suspend	= hdmi_panel_suspend,

	.resume		= hdmi_panel_resume,

	.get_timings	= hdmi_get_timings,

	.set_timings	= hdmi_set_timings,

	.check_timings	= hdmi_check_timings,

	.driver			= {

		.name   = "hdmi_panel",

		.owner  = THIS_MODULE,

	},

};



int hdmi_panel_init(void)

{

	mutex_init(&hdmi.hdmi_lock);



	omap_dss_register_driver(&hdmi_driver);



	return 0;

}



void hdmi_panel_exit(void)

{

	omap_dss_unregister_driver(&hdmi_driver);



}