1aee94f86SFrançois Tigeot /*
2aee94f86SFrançois Tigeot * Copyright (C) 2009 Francisco Jerez.
3aee94f86SFrançois Tigeot * All Rights Reserved.
4aee94f86SFrançois Tigeot *
5aee94f86SFrançois Tigeot * Permission is hereby granted, free of charge, to any person obtaining
6aee94f86SFrançois Tigeot * a copy of this software and associated documentation files (the
7aee94f86SFrançois Tigeot * "Software"), to deal in the Software without restriction, including
8aee94f86SFrançois Tigeot * without limitation the rights to use, copy, modify, merge, publish,
9aee94f86SFrançois Tigeot * distribute, sublicense, and/or sell copies of the Software, and to
10aee94f86SFrançois Tigeot * permit persons to whom the Software is furnished to do so, subject to
11aee94f86SFrançois Tigeot * the following conditions:
12aee94f86SFrançois Tigeot *
13aee94f86SFrançois Tigeot * The above copyright notice and this permission notice (including the
14aee94f86SFrançois Tigeot * next paragraph) shall be included in all copies or substantial
15aee94f86SFrançois Tigeot * portions of the Software.
16aee94f86SFrançois Tigeot *
17aee94f86SFrançois Tigeot * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
18aee94f86SFrançois Tigeot * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
19aee94f86SFrançois Tigeot * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
20aee94f86SFrançois Tigeot * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
21aee94f86SFrançois Tigeot * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
22aee94f86SFrançois Tigeot * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
23aee94f86SFrançois Tigeot * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
24aee94f86SFrançois Tigeot *
25aee94f86SFrançois Tigeot */
26aee94f86SFrançois Tigeot
27aee94f86SFrançois Tigeot #include <linux/module.h>
28aee94f86SFrançois Tigeot
29aee94f86SFrançois Tigeot #include <drm/drm_encoder_slave.h>
30aee94f86SFrançois Tigeot
31aee94f86SFrançois Tigeot #if 0
32aee94f86SFrançois Tigeot /**
33aee94f86SFrançois Tigeot * drm_i2c_encoder_init - Initialize an I2C slave encoder
34aee94f86SFrançois Tigeot * @dev: DRM device.
35aee94f86SFrançois Tigeot * @encoder: Encoder to be attached to the I2C device. You aren't
36aee94f86SFrançois Tigeot * required to have called drm_encoder_init() before.
37aee94f86SFrançois Tigeot * @adap: I2C adapter that will be used to communicate with
38aee94f86SFrançois Tigeot * the device.
39aee94f86SFrançois Tigeot * @info: Information that will be used to create the I2C device.
40aee94f86SFrançois Tigeot * Required fields are @addr and @type.
41aee94f86SFrançois Tigeot *
42aee94f86SFrançois Tigeot * Create an I2C device on the specified bus (the module containing its
43aee94f86SFrançois Tigeot * driver is transparently loaded) and attach it to the specified
44aee94f86SFrançois Tigeot * &drm_encoder_slave. The @slave_funcs field will be initialized with
45aee94f86SFrançois Tigeot * the hooks provided by the slave driver.
46aee94f86SFrançois Tigeot *
47*a85cb24fSFrançois Tigeot * If @info.platform_data is non-NULL it will be used as the initial
48aee94f86SFrançois Tigeot * slave config.
49aee94f86SFrançois Tigeot *
50aee94f86SFrançois Tigeot * Returns 0 on success or a negative errno on failure, in particular,
51aee94f86SFrançois Tigeot * -ENODEV is returned when no matching driver is found.
52aee94f86SFrançois Tigeot */
53aee94f86SFrançois Tigeot int drm_i2c_encoder_init(struct drm_device *dev,
54aee94f86SFrançois Tigeot struct drm_encoder_slave *encoder,
55aee94f86SFrançois Tigeot struct i2c_adapter *adap,
56aee94f86SFrançois Tigeot const struct i2c_board_info *info)
57aee94f86SFrançois Tigeot {
58aee94f86SFrançois Tigeot struct module *module = NULL;
59aee94f86SFrançois Tigeot struct i2c_client *client;
60aee94f86SFrançois Tigeot struct drm_i2c_encoder_driver *encoder_drv;
61aee94f86SFrançois Tigeot int err = 0;
62aee94f86SFrançois Tigeot
63aee94f86SFrançois Tigeot request_module("%s%s", I2C_MODULE_PREFIX, info->type);
64aee94f86SFrançois Tigeot
65aee94f86SFrançois Tigeot client = i2c_new_device(adap, info);
66aee94f86SFrançois Tigeot if (!client) {
67aee94f86SFrançois Tigeot err = -ENOMEM;
68aee94f86SFrançois Tigeot goto fail;
69aee94f86SFrançois Tigeot }
70aee94f86SFrançois Tigeot
71aee94f86SFrançois Tigeot if (!client->dev.driver) {
72aee94f86SFrançois Tigeot err = -ENODEV;
73aee94f86SFrançois Tigeot goto fail_unregister;
74aee94f86SFrançois Tigeot }
75aee94f86SFrançois Tigeot
76aee94f86SFrançois Tigeot module = client->dev.driver->owner;
77aee94f86SFrançois Tigeot if (!try_module_get(module)) {
78aee94f86SFrançois Tigeot err = -ENODEV;
79aee94f86SFrançois Tigeot goto fail_unregister;
80aee94f86SFrançois Tigeot }
81aee94f86SFrançois Tigeot
82aee94f86SFrançois Tigeot encoder->bus_priv = client;
83aee94f86SFrançois Tigeot
84aee94f86SFrançois Tigeot encoder_drv = to_drm_i2c_encoder_driver(to_i2c_driver(client->dev.driver));
85aee94f86SFrançois Tigeot
86aee94f86SFrançois Tigeot err = encoder_drv->encoder_init(client, dev, encoder);
87aee94f86SFrançois Tigeot if (err)
88aee94f86SFrançois Tigeot goto fail_unregister;
89aee94f86SFrançois Tigeot
90aee94f86SFrançois Tigeot if (info->platform_data)
91aee94f86SFrançois Tigeot encoder->slave_funcs->set_config(&encoder->base,
92aee94f86SFrançois Tigeot info->platform_data);
93aee94f86SFrançois Tigeot
94aee94f86SFrançois Tigeot return 0;
95aee94f86SFrançois Tigeot
96aee94f86SFrançois Tigeot fail_unregister:
97aee94f86SFrançois Tigeot i2c_unregister_device(client);
98aee94f86SFrançois Tigeot module_put(module);
99aee94f86SFrançois Tigeot fail:
100aee94f86SFrançois Tigeot return err;
101aee94f86SFrançois Tigeot }
102aee94f86SFrançois Tigeot EXPORT_SYMBOL(drm_i2c_encoder_init);
103aee94f86SFrançois Tigeot
104aee94f86SFrançois Tigeot /**
105aee94f86SFrançois Tigeot * drm_i2c_encoder_destroy - Unregister the I2C device backing an encoder
106aee94f86SFrançois Tigeot * @drm_encoder: Encoder to be unregistered.
107aee94f86SFrançois Tigeot *
108aee94f86SFrançois Tigeot * This should be called from the @destroy method of an I2C slave
109aee94f86SFrançois Tigeot * encoder driver once I2C access is no longer needed.
110aee94f86SFrançois Tigeot */
111aee94f86SFrançois Tigeot void drm_i2c_encoder_destroy(struct drm_encoder *drm_encoder)
112aee94f86SFrançois Tigeot {
113aee94f86SFrançois Tigeot struct drm_encoder_slave *encoder = to_encoder_slave(drm_encoder);
114aee94f86SFrançois Tigeot struct i2c_client *client = drm_i2c_encoder_get_client(drm_encoder);
115aee94f86SFrançois Tigeot struct module *module = client->dev.driver->owner;
116aee94f86SFrançois Tigeot
117aee94f86SFrançois Tigeot i2c_unregister_device(client);
118aee94f86SFrançois Tigeot encoder->bus_priv = NULL;
119aee94f86SFrançois Tigeot
120aee94f86SFrançois Tigeot module_put(module);
121aee94f86SFrançois Tigeot }
122aee94f86SFrançois Tigeot EXPORT_SYMBOL(drm_i2c_encoder_destroy);
123aee94f86SFrançois Tigeot #endif
124aee94f86SFrançois Tigeot
125aee94f86SFrançois Tigeot /*
126aee94f86SFrançois Tigeot * Wrapper fxns which can be plugged in to drm_encoder_helper_funcs:
127aee94f86SFrançois Tigeot */
128aee94f86SFrançois Tigeot
129aee94f86SFrançois Tigeot static inline const struct drm_encoder_slave_funcs *
get_slave_funcs(struct drm_encoder * enc)130aee94f86SFrançois Tigeot get_slave_funcs(struct drm_encoder *enc)
131aee94f86SFrançois Tigeot {
132aee94f86SFrançois Tigeot return to_encoder_slave(enc)->slave_funcs;
133aee94f86SFrançois Tigeot }
134aee94f86SFrançois Tigeot
drm_i2c_encoder_dpms(struct drm_encoder * encoder,int mode)135aee94f86SFrançois Tigeot void drm_i2c_encoder_dpms(struct drm_encoder *encoder, int mode)
136aee94f86SFrançois Tigeot {
137aee94f86SFrançois Tigeot get_slave_funcs(encoder)->dpms(encoder, mode);
138aee94f86SFrançois Tigeot }
139aee94f86SFrançois Tigeot EXPORT_SYMBOL(drm_i2c_encoder_dpms);
140aee94f86SFrançois Tigeot
drm_i2c_encoder_mode_fixup(struct drm_encoder * encoder,const struct drm_display_mode * mode,struct drm_display_mode * adjusted_mode)141aee94f86SFrançois Tigeot bool drm_i2c_encoder_mode_fixup(struct drm_encoder *encoder,
142aee94f86SFrançois Tigeot const struct drm_display_mode *mode,
143aee94f86SFrançois Tigeot struct drm_display_mode *adjusted_mode)
144aee94f86SFrançois Tigeot {
145c0e85e96SFrançois Tigeot if (!get_slave_funcs(encoder)->mode_fixup)
146c0e85e96SFrançois Tigeot return true;
147c0e85e96SFrançois Tigeot
148aee94f86SFrançois Tigeot return get_slave_funcs(encoder)->mode_fixup(encoder, mode, adjusted_mode);
149aee94f86SFrançois Tigeot }
150aee94f86SFrançois Tigeot EXPORT_SYMBOL(drm_i2c_encoder_mode_fixup);
151aee94f86SFrançois Tigeot
drm_i2c_encoder_prepare(struct drm_encoder * encoder)152aee94f86SFrançois Tigeot void drm_i2c_encoder_prepare(struct drm_encoder *encoder)
153aee94f86SFrançois Tigeot {
154aee94f86SFrançois Tigeot drm_i2c_encoder_dpms(encoder, DRM_MODE_DPMS_OFF);
155aee94f86SFrançois Tigeot }
156aee94f86SFrançois Tigeot EXPORT_SYMBOL(drm_i2c_encoder_prepare);
157aee94f86SFrançois Tigeot
drm_i2c_encoder_commit(struct drm_encoder * encoder)158aee94f86SFrançois Tigeot void drm_i2c_encoder_commit(struct drm_encoder *encoder)
159aee94f86SFrançois Tigeot {
160aee94f86SFrançois Tigeot drm_i2c_encoder_dpms(encoder, DRM_MODE_DPMS_ON);
161aee94f86SFrançois Tigeot }
162aee94f86SFrançois Tigeot EXPORT_SYMBOL(drm_i2c_encoder_commit);
163aee94f86SFrançois Tigeot
drm_i2c_encoder_mode_set(struct drm_encoder * encoder,struct drm_display_mode * mode,struct drm_display_mode * adjusted_mode)164aee94f86SFrançois Tigeot void drm_i2c_encoder_mode_set(struct drm_encoder *encoder,
165aee94f86SFrançois Tigeot struct drm_display_mode *mode,
166aee94f86SFrançois Tigeot struct drm_display_mode *adjusted_mode)
167aee94f86SFrançois Tigeot {
168aee94f86SFrançois Tigeot get_slave_funcs(encoder)->mode_set(encoder, mode, adjusted_mode);
169aee94f86SFrançois Tigeot }
170aee94f86SFrançois Tigeot EXPORT_SYMBOL(drm_i2c_encoder_mode_set);
171aee94f86SFrançois Tigeot
drm_i2c_encoder_detect(struct drm_encoder * encoder,struct drm_connector * connector)172aee94f86SFrançois Tigeot enum drm_connector_status drm_i2c_encoder_detect(struct drm_encoder *encoder,
173aee94f86SFrançois Tigeot struct drm_connector *connector)
174aee94f86SFrançois Tigeot {
175aee94f86SFrançois Tigeot return get_slave_funcs(encoder)->detect(encoder, connector);
176aee94f86SFrançois Tigeot }
177aee94f86SFrançois Tigeot EXPORT_SYMBOL(drm_i2c_encoder_detect);
178aee94f86SFrançois Tigeot
drm_i2c_encoder_save(struct drm_encoder * encoder)179aee94f86SFrançois Tigeot void drm_i2c_encoder_save(struct drm_encoder *encoder)
180aee94f86SFrançois Tigeot {
181aee94f86SFrançois Tigeot get_slave_funcs(encoder)->save(encoder);
182aee94f86SFrançois Tigeot }
183aee94f86SFrançois Tigeot EXPORT_SYMBOL(drm_i2c_encoder_save);
184aee94f86SFrançois Tigeot
drm_i2c_encoder_restore(struct drm_encoder * encoder)185aee94f86SFrançois Tigeot void drm_i2c_encoder_restore(struct drm_encoder *encoder)
186aee94f86SFrançois Tigeot {
187aee94f86SFrançois Tigeot get_slave_funcs(encoder)->restore(encoder);
188aee94f86SFrançois Tigeot }
189aee94f86SFrançois Tigeot EXPORT_SYMBOL(drm_i2c_encoder_restore);
190