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/*
* Copyright (C) 2012 Texas Instruments Ltd
* Author: Archit Taneja <archit@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/module.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <video/omapdss.h>
#include "dss.h"
static LIST_HEAD(output_list);
static DEFINE_MUTEX(output_lock);
int omapdss_output_set_device(struct omap_dss_output *out,
struct omap_dss_device *dssdev)
{
int r;
mutex_lock(&output_lock);
if (out->device) {
DSSERR("output already has device %s connected to it\n",
out->device->name);
r = -EINVAL;
goto err;
}
if (out->type != dssdev->type) {
DSSERR("output type and display type don't match\n");
r = -EINVAL;
goto err;
}
out->device = dssdev;
dssdev->output = out;
mutex_unlock(&output_lock);
return 0;
err:
mutex_unlock(&output_lock);
return r;
}
EXPORT_SYMBOL(omapdss_output_set_device);
int omapdss_output_unset_device(struct omap_dss_output *out)
{
int r;
mutex_lock(&output_lock);
if (!out->device) {
DSSERR("output doesn't have a device connected to it\n");
r = -EINVAL;
goto err;
}
if (out->device->state != OMAP_DSS_DISPLAY_DISABLED) {
DSSERR("device %s is not disabled, cannot unset device\n",
out->device->name);
r = -EINVAL;
goto err;
}
out->device->output = NULL;
out->device = NULL;
mutex_unlock(&output_lock);
return 0;
err:
mutex_unlock(&output_lock);
return r;
}
EXPORT_SYMBOL(omapdss_output_unset_device);
void dss_register_output(struct omap_dss_output *out)
{
list_add_tail(&out->list, &output_list);
}
void dss_unregister_output(struct omap_dss_output *out)
{
list_del(&out->list);
}
struct omap_dss_output *omap_dss_get_output(enum omap_dss_output_id id)
{
struct omap_dss_output *out;
list_for_each_entry(out, &output_list, list) {
if (out->id == id)
return out;
}
return NULL;
}
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