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484dc404 AT |
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> | |
6d71b923 | 19 | #include <linux/module.h> |
484dc404 AT |
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); | |
6d71b923 AT |
28 | static DEFINE_MUTEX(output_lock); |
29 | ||
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 | ||
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); | |
484dc404 AT |
94 | |
95 | void dss_register_output(struct omap_dss_output *out) | |
96 | { | |
97 | list_add_tail(&out->list, &output_list); | |
98 | } | |
99 | ||
100 | void dss_unregister_output(struct omap_dss_output *out) | |
101 | { | |
102 | list_del(&out->list); | |
103 | } | |
104 | ||
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 | } | |
32248276 AT |
116 | |
117 | struct omap_dss_output *omapdss_get_output_from_dssdev(struct omap_dss_device *dssdev) | |
118 | { | |
119 | struct omap_dss_output *out = NULL; | |
120 | enum omap_dss_output_id id; | |
121 | ||
122 | switch (dssdev->type) { | |
123 | case OMAP_DISPLAY_TYPE_DPI: | |
124 | out = omap_dss_get_output(OMAP_DSS_OUTPUT_DPI); | |
125 | break; | |
126 | case OMAP_DISPLAY_TYPE_DBI: | |
127 | out = omap_dss_get_output(OMAP_DSS_OUTPUT_DBI); | |
128 | break; | |
129 | case OMAP_DISPLAY_TYPE_SDI: | |
130 | out = omap_dss_get_output(OMAP_DSS_OUTPUT_SDI); | |
131 | break; | |
132 | case OMAP_DISPLAY_TYPE_VENC: | |
133 | out = omap_dss_get_output(OMAP_DSS_OUTPUT_VENC); | |
134 | break; | |
135 | case OMAP_DISPLAY_TYPE_HDMI: | |
136 | out = omap_dss_get_output(OMAP_DSS_OUTPUT_HDMI); | |
137 | break; | |
138 | case OMAP_DISPLAY_TYPE_DSI: | |
139 | id = dssdev->phy.dsi.module == 0 ? OMAP_DSS_OUTPUT_DSI1 : | |
140 | OMAP_DSS_OUTPUT_DSI2; | |
141 | out = omap_dss_get_output(id); | |
142 | break; | |
143 | default: | |
144 | break; | |
145 | } | |
146 | ||
147 | return out; | |
148 | } |