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 "drmP.h"
31 #include "drm_crtc.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 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 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 */
drm_i2c_encoder_get_client(struct drm_encoder * encoder)135 static inline struct i2c_client *drm_i2c_encoder_get_client(struct drm_encoder *encoder)
136 {
137 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 */
drm_i2c_encoder_register(struct module * owner,struct drm_i2c_encoder_driver * driver)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 */
drm_i2c_encoder_unregister(struct drm_i2c_encoder_driver * driver)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 #endif
163