2 * Copyright (C) 2012 Texas Instruments Ltd
3 * Author: Archit Taneja <archit@ti.com>
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 as published by
7 * the Free Software Foundation.
9 * This program is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
14 * You should have received a copy of the GNU General Public License along with
15 * this program. If not, see <http://www.gnu.org/licenses/>.
18 #include <linux/kernel.h>
19 #include <linux/module.h>
20 #include <linux/platform_device.h>
21 #include <linux/slab.h>
23 #include <video/omapdss.h>
27 static LIST_HEAD(output_list);
28 static DEFINE_MUTEX(output_lock);
30 int omapdss_output_set_device(struct omap_dss_output *out,
31 struct omap_dss_device *dssdev)
35 mutex_lock(&output_lock);
38 DSSERR("output already has device %s connected to it\n",
44 if (out->type != dssdev->type) {
45 DSSERR("output type and display type don't match\n");
53 mutex_unlock(&output_lock);
57 mutex_unlock(&output_lock);
61 EXPORT_SYMBOL(omapdss_output_set_device);
63 int omapdss_output_unset_device(struct omap_dss_output *out)
67 mutex_lock(&output_lock);
70 DSSERR("output doesn't have a device connected to it\n");
75 if (out->device->state != OMAP_DSS_DISPLAY_DISABLED) {
76 DSSERR("device %s is not disabled, cannot unset device\n",
82 out->device->output = NULL;
85 mutex_unlock(&output_lock);
89 mutex_unlock(&output_lock);
93 EXPORT_SYMBOL(omapdss_output_unset_device);
95 void dss_register_output(struct omap_dss_output *out)
97 list_add_tail(&out->list, &output_list);
100 void dss_unregister_output(struct omap_dss_output *out)
102 list_del(&out->list);
105 struct omap_dss_output *omap_dss_get_output(enum omap_dss_output_id id)
107 struct omap_dss_output *out;
109 list_for_each_entry(out, &output_list, list) {