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23#define DSS_SUBSYS_NAME "DISPLAY"
24
25#include <linux/kernel.h>
26#include <linux/module.h>
27#include <linux/jiffies.h>
28#include <linux/platform_device.h>
29#include <linux/of.h>
30
31#include "omapdss.h"
32
33void omapdss_default_get_timings(struct omap_dss_device *dssdev,
34 struct videomode *vm)
35{
36 *vm = dssdev->panel.vm;
37}
38EXPORT_SYMBOL(omapdss_default_get_timings);
39
40static LIST_HEAD(panel_list);
41static DEFINE_MUTEX(panel_list_mutex);
42static int disp_num_counter;
43
44int omapdss_register_display(struct omap_dss_device *dssdev)
45{
46 struct omap_dss_driver *drv = dssdev->driver;
47 struct list_head *cur;
48 int id;
49
50
51
52
53
54 id = of_alias_get_id(dssdev->dev->of_node, "display");
55 if (id < 0)
56 id = disp_num_counter++;
57
58 snprintf(dssdev->alias, sizeof(dssdev->alias), "display%d", id);
59
60
61 of_property_read_string(dssdev->dev->of_node, "label", &dssdev->name);
62
63 if (dssdev->name == NULL)
64 dssdev->name = dssdev->alias;
65
66 if (drv && drv->get_timings == NULL)
67 drv->get_timings = omapdss_default_get_timings;
68
69 mutex_lock(&panel_list_mutex);
70 list_for_each(cur, &panel_list) {
71 struct omap_dss_device *ldev = list_entry(cur,
72 struct omap_dss_device,
73 panel_list);
74 if (strcmp(ldev->alias, dssdev->alias) > 0)
75 break;
76 }
77 list_add_tail(&dssdev->panel_list, cur);
78 mutex_unlock(&panel_list_mutex);
79 return 0;
80}
81EXPORT_SYMBOL(omapdss_register_display);
82
83void omapdss_unregister_display(struct omap_dss_device *dssdev)
84{
85 mutex_lock(&panel_list_mutex);
86 list_del(&dssdev->panel_list);
87 mutex_unlock(&panel_list_mutex);
88}
89EXPORT_SYMBOL(omapdss_unregister_display);
90
91bool omapdss_component_is_display(struct device_node *node)
92{
93 struct omap_dss_device *dssdev;
94 bool found = false;
95
96 mutex_lock(&panel_list_mutex);
97 list_for_each_entry(dssdev, &panel_list, panel_list) {
98 if (dssdev->dev->of_node == node) {
99 found = true;
100 goto out;
101 }
102 }
103out:
104 mutex_unlock(&panel_list_mutex);
105 return found;
106}
107EXPORT_SYMBOL(omapdss_component_is_display);
108
109struct omap_dss_device *omap_dss_get_device(struct omap_dss_device *dssdev)
110{
111 if (!try_module_get(dssdev->owner))
112 return NULL;
113
114 if (get_device(dssdev->dev) == NULL) {
115 module_put(dssdev->owner);
116 return NULL;
117 }
118
119 return dssdev;
120}
121EXPORT_SYMBOL(omap_dss_get_device);
122
123void omap_dss_put_device(struct omap_dss_device *dssdev)
124{
125 put_device(dssdev->dev);
126 module_put(dssdev->owner);
127}
128EXPORT_SYMBOL(omap_dss_put_device);
129
130
131
132
133
134struct omap_dss_device *omap_dss_get_next_device(struct omap_dss_device *from)
135{
136 struct list_head *l;
137 struct omap_dss_device *dssdev;
138
139 mutex_lock(&panel_list_mutex);
140
141 if (list_empty(&panel_list)) {
142 dssdev = NULL;
143 goto out;
144 }
145
146 if (from == NULL) {
147 dssdev = list_first_entry(&panel_list, struct omap_dss_device,
148 panel_list);
149 omap_dss_get_device(dssdev);
150 goto out;
151 }
152
153 omap_dss_put_device(from);
154
155 list_for_each(l, &panel_list) {
156 dssdev = list_entry(l, struct omap_dss_device, panel_list);
157 if (dssdev == from) {
158 if (list_is_last(l, &panel_list)) {
159 dssdev = NULL;
160 goto out;
161 }
162
163 dssdev = list_entry(l->next, struct omap_dss_device,
164 panel_list);
165 omap_dss_get_device(dssdev);
166 goto out;
167 }
168 }
169
170 WARN(1, "'from' dssdev not found\n");
171
172 dssdev = NULL;
173out:
174 mutex_unlock(&panel_list_mutex);
175 return dssdev;
176}
177EXPORT_SYMBOL(omap_dss_get_next_device);
178
179struct omap_dss_device *omap_dss_find_device(void *data,
180 int (*match)(struct omap_dss_device *dssdev, void *data))
181{
182 struct omap_dss_device *dssdev = NULL;
183
184 while ((dssdev = omap_dss_get_next_device(dssdev)) != NULL) {
185 if (match(dssdev, data))
186 return dssdev;
187 }
188
189 return NULL;
190}
191EXPORT_SYMBOL(omap_dss_find_device);
192
