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27#include <linux/module.h>
28
29#include <drm/drm_encoder_slave.h>
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52int drm_i2c_encoder_init(struct drm_device *dev,
53 struct drm_encoder_slave *encoder,
54 struct i2c_adapter *adap,
55 const struct i2c_board_info *info)
56{
57 struct module *module = NULL;
58 struct i2c_client *client;
59 struct drm_i2c_encoder_driver *encoder_drv;
60 int err = 0;
61
62 request_module("%s%s", I2C_MODULE_PREFIX, info->type);
63
64 client = i2c_new_client_device(adap, info);
65 if (!i2c_client_has_driver(client)) {
66 err = -ENODEV;
67 goto fail_unregister;
68 }
69
70 module = client->dev.driver->owner;
71 if (!try_module_get(module)) {
72 err = -ENODEV;
73 goto fail_unregister;
74 }
75
76 encoder->bus_priv = client;
77
78 encoder_drv = to_drm_i2c_encoder_driver(to_i2c_driver(client->dev.driver));
79
80 err = encoder_drv->encoder_init(client, dev, encoder);
81 if (err)
82 goto fail_module_put;
83
84 if (info->platform_data)
85 encoder->slave_funcs->set_config(&encoder->base,
86 info->platform_data);
87
88 return 0;
89
90fail_module_put:
91 module_put(module);
92fail_unregister:
93 i2c_unregister_device(client);
94 return err;
95}
96EXPORT_SYMBOL(drm_i2c_encoder_init);
97
98
99
100
101
102
103
104
105void drm_i2c_encoder_destroy(struct drm_encoder *drm_encoder)
106{
107 struct drm_encoder_slave *encoder = to_encoder_slave(drm_encoder);
108 struct i2c_client *client = drm_i2c_encoder_get_client(drm_encoder);
109 struct module *module = client->dev.driver->owner;
110
111 i2c_unregister_device(client);
112 encoder->bus_priv = NULL;
113
114 module_put(module);
115}
116EXPORT_SYMBOL(drm_i2c_encoder_destroy);
117
118
119
120
121
122static inline const struct drm_encoder_slave_funcs *
123get_slave_funcs(struct drm_encoder *enc)
124{
125 return to_encoder_slave(enc)->slave_funcs;
126}
127
128void drm_i2c_encoder_dpms(struct drm_encoder *encoder, int mode)
129{
130 get_slave_funcs(encoder)->dpms(encoder, mode);
131}
132EXPORT_SYMBOL(drm_i2c_encoder_dpms);
133
134bool drm_i2c_encoder_mode_fixup(struct drm_encoder *encoder,
135 const struct drm_display_mode *mode,
136 struct drm_display_mode *adjusted_mode)
137{
138 if (!get_slave_funcs(encoder)->mode_fixup)
139 return true;
140
141 return get_slave_funcs(encoder)->mode_fixup(encoder, mode, adjusted_mode);
142}
143EXPORT_SYMBOL(drm_i2c_encoder_mode_fixup);
144
145void drm_i2c_encoder_prepare(struct drm_encoder *encoder)
146{
147 drm_i2c_encoder_dpms(encoder, DRM_MODE_DPMS_OFF);
148}
149EXPORT_SYMBOL(drm_i2c_encoder_prepare);
150
151void drm_i2c_encoder_commit(struct drm_encoder *encoder)
152{
153 drm_i2c_encoder_dpms(encoder, DRM_MODE_DPMS_ON);
154}
155EXPORT_SYMBOL(drm_i2c_encoder_commit);
156
157void drm_i2c_encoder_mode_set(struct drm_encoder *encoder,
158 struct drm_display_mode *mode,
159 struct drm_display_mode *adjusted_mode)
160{
161 get_slave_funcs(encoder)->mode_set(encoder, mode, adjusted_mode);
162}
163EXPORT_SYMBOL(drm_i2c_encoder_mode_set);
164
165enum drm_connector_status drm_i2c_encoder_detect(struct drm_encoder *encoder,
166 struct drm_connector *connector)
167{
168 return get_slave_funcs(encoder)->detect(encoder, connector);
169}
170EXPORT_SYMBOL(drm_i2c_encoder_detect);
171
172void drm_i2c_encoder_save(struct drm_encoder *encoder)
173{
174 get_slave_funcs(encoder)->save(encoder);
175}
176EXPORT_SYMBOL(drm_i2c_encoder_save);
177
178void drm_i2c_encoder_restore(struct drm_encoder *encoder)
179{
180 get_slave_funcs(encoder)->restore(encoder);
181}
182EXPORT_SYMBOL(drm_i2c_encoder_restore);
183