1 /*
2 * Copyright (C) 2012 Texas Instruments Ltd
3 * Author: Archit Taneja <archit@ti.com>
4 *
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.
8 *
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
12 * more details.
13 *
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/>.
16 */
17
18 #include <linux/kernel.h>
19 #include <linux/module.h>
20 #include <linux/platform_device.h>
21 #include <linux/slab.h>
22
23 #include <video/omapdss.h>
24
25 #include "dss.h"
26
27 static LIST_HEAD(output_list);
28 static DEFINE_MUTEX(output_lock);
29
omapdss_output_set_device(struct omap_dss_output * out,struct omap_dss_device * dssdev)30 int omapdss_output_set_device(struct omap_dss_output *out,
31 struct omap_dss_device *dssdev)
32 {
33 int r;
34
35 mutex_lock(&output_lock);
36
37 if (out->device) {
38 DSSERR("output already has device %s connected to it\n",
39 out->device->name);
40 r = -EINVAL;
41 goto err;
42 }
43
44 if (out->type != dssdev->type) {
45 DSSERR("output type and display type don't match\n");
46 r = -EINVAL;
47 goto err;
48 }
49
50 out->device = dssdev;
51 dssdev->output = out;
52
53 mutex_unlock(&output_lock);
54
55 return 0;
56 err:
57 mutex_unlock(&output_lock);
58
59 return r;
60 }
61 EXPORT_SYMBOL(omapdss_output_set_device);
62
omapdss_output_unset_device(struct omap_dss_output * out)63 int omapdss_output_unset_device(struct omap_dss_output *out)
64 {
65 int r;
66
67 mutex_lock(&output_lock);
68
69 if (!out->device) {
70 DSSERR("output doesn't have a device connected to it\n");
71 r = -EINVAL;
72 goto err;
73 }
74
75 if (out->device->state != OMAP_DSS_DISPLAY_DISABLED) {
76 DSSERR("device %s is not disabled, cannot unset device\n",
77 out->device->name);
78 r = -EINVAL;
79 goto err;
80 }
81
82 out->device->output = NULL;
83 out->device = NULL;
84
85 mutex_unlock(&output_lock);
86
87 return 0;
88 err:
89 mutex_unlock(&output_lock);
90
91 return r;
92 }
93 EXPORT_SYMBOL(omapdss_output_unset_device);
94
dss_register_output(struct omap_dss_output * out)95 void dss_register_output(struct omap_dss_output *out)
96 {
97 list_add_tail(&out->list, &output_list);
98 }
99
dss_unregister_output(struct omap_dss_output * out)100 void dss_unregister_output(struct omap_dss_output *out)
101 {
102 list_del(&out->list);
103 }
104
omap_dss_get_output(enum omap_dss_output_id id)105 struct omap_dss_output *omap_dss_get_output(enum omap_dss_output_id id)
106 {
107 struct omap_dss_output *out;
108
109 list_for_each_entry(out, &output_list, list) {
110 if (out->id == id)
111 return out;
112 }
113
114 return NULL;
115 }
116 EXPORT_SYMBOL(omap_dss_get_output);
117
118 static const struct dss_mgr_ops *dss_mgr_ops;
119
dss_install_mgr_ops(const struct dss_mgr_ops * mgr_ops)120 int dss_install_mgr_ops(const struct dss_mgr_ops *mgr_ops)
121 {
122 if (dss_mgr_ops)
123 return -EBUSY;
124
125 dss_mgr_ops = mgr_ops;
126
127 return 0;
128 }
129 EXPORT_SYMBOL(dss_install_mgr_ops);
130
dss_uninstall_mgr_ops(void)131 void dss_uninstall_mgr_ops(void)
132 {
133 dss_mgr_ops = NULL;
134 }
135 EXPORT_SYMBOL(dss_uninstall_mgr_ops);
136
dss_mgr_set_timings(struct omap_overlay_manager * mgr,const struct omap_video_timings * timings)137 void dss_mgr_set_timings(struct omap_overlay_manager *mgr,
138 const struct omap_video_timings *timings)
139 {
140 dss_mgr_ops->set_timings(mgr, timings);
141 }
142 EXPORT_SYMBOL(dss_mgr_set_timings);
143
dss_mgr_set_lcd_config(struct omap_overlay_manager * mgr,const struct dss_lcd_mgr_config * config)144 void dss_mgr_set_lcd_config(struct omap_overlay_manager *mgr,
145 const struct dss_lcd_mgr_config *config)
146 {
147 dss_mgr_ops->set_lcd_config(mgr, config);
148 }
149 EXPORT_SYMBOL(dss_mgr_set_lcd_config);
150
dss_mgr_enable(struct omap_overlay_manager * mgr)151 int dss_mgr_enable(struct omap_overlay_manager *mgr)
152 {
153 return dss_mgr_ops->enable(mgr);
154 }
155 EXPORT_SYMBOL(dss_mgr_enable);
156
dss_mgr_disable(struct omap_overlay_manager * mgr)157 void dss_mgr_disable(struct omap_overlay_manager *mgr)
158 {
159 dss_mgr_ops->disable(mgr);
160 }
161 EXPORT_SYMBOL(dss_mgr_disable);
162
dss_mgr_start_update(struct omap_overlay_manager * mgr)163 void dss_mgr_start_update(struct omap_overlay_manager *mgr)
164 {
165 dss_mgr_ops->start_update(mgr);
166 }
167 EXPORT_SYMBOL(dss_mgr_start_update);
168
dss_mgr_register_framedone_handler(struct omap_overlay_manager * mgr,void (* handler)(void *),void * data)169 int dss_mgr_register_framedone_handler(struct omap_overlay_manager *mgr,
170 void (*handler)(void *), void *data)
171 {
172 return dss_mgr_ops->register_framedone_handler(mgr, handler, data);
173 }
174 EXPORT_SYMBOL(dss_mgr_register_framedone_handler);
175
dss_mgr_unregister_framedone_handler(struct omap_overlay_manager * mgr,void (* handler)(void *),void * data)176 void dss_mgr_unregister_framedone_handler(struct omap_overlay_manager *mgr,
177 void (*handler)(void *), void *data)
178 {
179 dss_mgr_ops->unregister_framedone_handler(mgr, handler, data);
180 }
181 EXPORT_SYMBOL(dss_mgr_unregister_framedone_handler);
182