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1 : : /*
2 : : * Copyright (C) 2009 Francisco Jerez.
3 : : * All Rights Reserved.
4 : : *
5 : : * Permission is hereby granted, free of charge, to any person obtaining
6 : : * a copy of this software and associated documentation files (the
7 : : * "Software"), to deal in the Software without restriction, including
8 : : * without limitation the rights to use, copy, modify, merge, publish,
9 : : * distribute, sublicense, and/or sell copies of the Software, and to
10 : : * permit persons to whom the Software is furnished to do so, subject to
11 : : * the following conditions:
12 : : *
13 : : * The above copyright notice and this permission notice (including the
14 : : * next paragraph) shall be included in all copies or substantial
15 : : * portions of the Software.
16 : : *
17 : : * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
18 : : * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
19 : : * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
20 : : * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
21 : : * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
22 : : * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
23 : : * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
24 : : *
25 : : */
26 : :
27 : : #ifndef __DRM_ENCODER_SLAVE_H__
28 : : #define __DRM_ENCODER_SLAVE_H__
29 : :
30 : : #include <drm/drm_crtc.h>
31 : : #include <drm/drm_encoder.h>
32 : :
33 : : /**
34 : : * struct drm_encoder_slave_funcs - Entry points exposed by a slave encoder driver
35 : : * @set_config: Initialize any encoder-specific modesetting parameters.
36 : : * The meaning of the @params parameter is implementation
37 : : * dependent. It will usually be a structure with DVO port
38 : : * data format settings or timings. It's not required for
39 : : * the new parameters to take effect until the next mode
40 : : * is set.
41 : : *
42 : : * Most of its members are analogous to the function pointers in
43 : : * &drm_encoder_helper_funcs and they can optionally be used to
44 : : * initialize the latter. Connector-like methods (e.g. @get_modes and
45 : : * @set_property) will typically be wrapped around and only be called
46 : : * if the encoder is the currently selected one for the connector.
47 : : */
48 : : struct drm_encoder_slave_funcs {
49 : : void (*set_config)(struct drm_encoder *encoder,
50 : : void *params);
51 : :
52 : : void (*destroy)(struct drm_encoder *encoder);
53 : : void (*dpms)(struct drm_encoder *encoder, int mode);
54 : : void (*save)(struct drm_encoder *encoder);
55 : : void (*restore)(struct drm_encoder *encoder);
56 : : bool (*mode_fixup)(struct drm_encoder *encoder,
57 : : const struct drm_display_mode *mode,
58 : : struct drm_display_mode *adjusted_mode);
59 : : int (*mode_valid)(struct drm_encoder *encoder,
60 : : struct drm_display_mode *mode);
61 : : void (*mode_set)(struct drm_encoder *encoder,
62 : : struct drm_display_mode *mode,
63 : : struct drm_display_mode *adjusted_mode);
64 : :
65 : : enum drm_connector_status (*detect)(struct drm_encoder *encoder,
66 : : struct drm_connector *connector);
67 : : int (*get_modes)(struct drm_encoder *encoder,
68 : : struct drm_connector *connector);
69 : : int (*create_resources)(struct drm_encoder *encoder,
70 : : struct drm_connector *connector);
71 : : int (*set_property)(struct drm_encoder *encoder,
72 : : struct drm_connector *connector,
73 : : struct drm_property *property,
74 : : uint64_t val);
75 : :
76 : : };
77 : :
78 : : /**
79 : : * struct drm_encoder_slave - Slave encoder struct
80 : : * @base: DRM encoder object.
81 : : * @slave_funcs: Slave encoder callbacks.
82 : : * @slave_priv: Slave encoder private data.
83 : : * @bus_priv: Bus specific data.
84 : : *
85 : : * A &drm_encoder_slave has two sets of callbacks, @slave_funcs and the
86 : : * ones in @base. The former are never actually called by the common
87 : : * CRTC code, it's just a convenience for splitting the encoder
88 : : * functions in an upper, GPU-specific layer and a (hopefully)
89 : : * GPU-agnostic lower layer: It's the GPU driver responsibility to
90 : : * call the slave methods when appropriate.
91 : : *
92 : : * drm_i2c_encoder_init() provides a way to get an implementation of
93 : : * this.
94 : : */
95 : : struct drm_encoder_slave {
96 : : struct drm_encoder base;
97 : :
98 : : const struct drm_encoder_slave_funcs *slave_funcs;
99 : : void *slave_priv;
100 : : void *bus_priv;
101 : : };
102 : : #define to_encoder_slave(x) container_of((x), struct drm_encoder_slave, base)
103 : :
104 : : int drm_i2c_encoder_init(struct drm_device *dev,
105 : : struct drm_encoder_slave *encoder,
106 : : struct i2c_adapter *adap,
107 : : const struct i2c_board_info *info);
108 : :
109 : :
110 : : /**
111 : : * struct drm_i2c_encoder_driver
112 : : *
113 : : * Describes a device driver for an encoder connected to the GPU
114 : : * through an I2C bus. In addition to the entry points in @i2c_driver
115 : : * an @encoder_init function should be provided. It will be called to
116 : : * give the driver an opportunity to allocate any per-encoder data
117 : : * structures and to initialize the @slave_funcs and (optionally)
118 : : * @slave_priv members of @encoder.
119 : : */
120 : : struct drm_i2c_encoder_driver {
121 : : struct i2c_driver i2c_driver;
122 : :
123 : : int (*encoder_init)(struct i2c_client *client,
124 : : struct drm_device *dev,
125 : : struct drm_encoder_slave *encoder);
126 : :
127 : : };
128 : : #define to_drm_i2c_encoder_driver(x) container_of((x), \
129 : : struct drm_i2c_encoder_driver, \
130 : : i2c_driver)
131 : :
132 : : /**
133 : : * drm_i2c_encoder_get_client - Get the I2C client corresponding to an encoder
134 : : */
135 : 0 : static inline struct i2c_client *drm_i2c_encoder_get_client(struct drm_encoder *encoder)
136 : : {
137 : 0 : return (struct i2c_client *)to_encoder_slave(encoder)->bus_priv;
138 : : }
139 : :
140 : : /**
141 : : * drm_i2c_encoder_register - Register an I2C encoder driver
142 : : * @owner: Module containing the driver.
143 : : * @driver: Driver to be registered.
144 : : */
145 : : static inline int drm_i2c_encoder_register(struct module *owner,
146 : : struct drm_i2c_encoder_driver *driver)
147 : : {
148 : : return i2c_register_driver(owner, &driver->i2c_driver);
149 : : }
150 : :
151 : : /**
152 : : * drm_i2c_encoder_unregister - Unregister an I2C encoder driver
153 : : * @driver: Driver to be unregistered.
154 : : */
155 : : static inline void drm_i2c_encoder_unregister(struct drm_i2c_encoder_driver *driver)
156 : : {
157 : : i2c_del_driver(&driver->i2c_driver);
158 : : }
159 : :
160 : : void drm_i2c_encoder_destroy(struct drm_encoder *encoder);
161 : :
162 : :
163 : : /*
164 : : * Wrapper fxns which can be plugged in to drm_encoder_helper_funcs:
165 : : */
166 : :
167 : : void drm_i2c_encoder_dpms(struct drm_encoder *encoder, int mode);
168 : : bool drm_i2c_encoder_mode_fixup(struct drm_encoder *encoder,
169 : : const struct drm_display_mode *mode,
170 : : struct drm_display_mode *adjusted_mode);
171 : : void drm_i2c_encoder_prepare(struct drm_encoder *encoder);
172 : : void drm_i2c_encoder_commit(struct drm_encoder *encoder);
173 : : void drm_i2c_encoder_mode_set(struct drm_encoder *encoder,
174 : : struct drm_display_mode *mode,
175 : : struct drm_display_mode *adjusted_mode);
176 : : enum drm_connector_status drm_i2c_encoder_detect(struct drm_encoder *encoder,
177 : : struct drm_connector *connector);
178 : : void drm_i2c_encoder_save(struct drm_encoder *encoder);
179 : : void drm_i2c_encoder_restore(struct drm_encoder *encoder);
180 : :
181 : :
182 : : #endif
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