include/drm/drm_encoder_slave.h

   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/drmP.h>
  31 #include <drm/drm_crtc.h>
  32 #include <drm/drm_encoder.h>
  33
  34 /**
  35  * struct drm_encoder_slave_funcs - Entry points exposed by a slave encoder driver
  36  * @set_config: Initialize any encoder-specific modesetting parameters.
  37  *              The meaning of the @params parameter is implementation
  38  *              dependent. It will usually be a structure with DVO port
  39  *              data format settings or timings. It's not required for
  40  *              the new parameters to take effect until the next mode
  41  *              is set.
  42  *
  43  * Most of its members are analogous to the function pointers in
  44  * &drm_encoder_helper_funcs and they can optionally be used to
  45  * initialize the latter. Connector-like methods (e.g. @get_modes and
  46  * @set_property) will typically be wrapped around and only be called
  47  * if the encoder is the currently selected one for the connector.
  48  */
  49 struct drm_encoder_slave_funcs {
  50         void (*set_config)(struct drm_encoder *encoder,
  51                            void *params);
  52
  53         void (*destroy)(struct drm_encoder *encoder);
  54         void (*dpms)(struct drm_encoder *encoder, int mode);
  55         void (*save)(struct drm_encoder *encoder);
  56         void (*restore)(struct drm_encoder *encoder);
  57         bool (*mode_fixup)(struct drm_encoder *encoder,
  58                            const struct drm_display_mode *mode,
  59                            struct drm_display_mode *adjusted_mode);
  60         int (*mode_valid)(struct drm_encoder *encoder,
  61                           struct drm_display_mode *mode);
  62         void (*mode_set)(struct drm_encoder *encoder,
  63                          struct drm_display_mode *mode,
  64                          struct drm_display_mode *adjusted_mode);
  65
  66         enum drm_connector_status (*detect)(struct drm_encoder *encoder,
  67                                             struct drm_connector *connector);
  68         int (*get_modes)(struct drm_encoder *encoder,
  69                          struct drm_connector *connector);
  70         int (*create_resources)(struct drm_encoder *encoder,
  71                                  struct drm_connector *connector);
  72         int (*set_property)(struct drm_encoder *encoder,
  73                             struct drm_connector *connector,
  74                             struct drm_property *property,
  75                             uint64_t val);
  76
  77 };
  78
  79 /**
  80  * struct drm_encoder_slave - Slave encoder struct
  81  * @base: DRM encoder object.
  82  * @slave_funcs: Slave encoder callbacks.
  83  * @slave_priv: Slave encoder private data.
  84  * @bus_priv: Bus specific data.
  85  *
  86  * A &drm_encoder_slave has two sets of callbacks, @slave_funcs and the
  87  * ones in @base. The former are never actually called by the common
  88  * CRTC code, it's just a convenience for splitting the encoder
  89  * functions in an upper, GPU-specific layer and a (hopefully)
  90  * GPU-agnostic lower layer: It's the GPU driver responsibility to
  91  * call the slave methods when appropriate.
  92  *
  93  * drm_i2c_encoder_init() provides a way to get an implementation of
  94  * this.
  95  */
  96 struct drm_encoder_slave {
  97         struct drm_encoder base;
  98
  99         const struct drm_encoder_slave_funcs *slave_funcs;
 100         void *slave_priv;
 101         void *bus_priv;
 102 };
 103 #define to_encoder_slave(x) container_of((x), struct drm_encoder_slave, base)
 104
 105 int drm_i2c_encoder_init(struct drm_device *dev,
 106                          struct drm_encoder_slave *encoder,
 107                          struct i2c_adapter *adap,
 108                          const struct i2c_board_info *info);
 109
 110
 111 /**
 112  * struct drm_i2c_encoder_driver
 113  *
 114  * Describes a device driver for an encoder connected to the GPU
 115  * through an I2C bus. In addition to the entry points in @i2c_driver
 116  * an @encoder_init function should be provided. It will be called to
 117  * give the driver an opportunity to allocate any per-encoder data
 118  * structures and to initialize the @slave_funcs and (optionally)
 119  * @slave_priv members of @encoder.
 120  */
 121 struct drm_i2c_encoder_driver {
 122         struct i2c_driver i2c_driver;
 123
 124         int (*encoder_init)(struct i2c_client *client,
 125                             struct drm_device *dev,
 126                             struct drm_encoder_slave *encoder);
 127
 128 };
 129 #define to_drm_i2c_encoder_driver(x) container_of((x),                  \
 130                                                   struct drm_i2c_encoder_driver, \
 131                                                   i2c_driver)
 132
 133 /**
 134  * drm_i2c_encoder_get_client - Get the I2C client corresponding to an encoder
 135  */
 136 static inline struct i2c_client *drm_i2c_encoder_get_client(struct drm_encoder *encoder)
 137 {
 138         return (struct i2c_client *)to_encoder_slave(encoder)->bus_priv;
 139 }
 140
 141 /**
 142  * drm_i2c_encoder_register - Register an I2C encoder driver
 143  * @owner:      Module containing the driver.
 144  * @driver:     Driver to be registered.
 145  */
 146 static inline int drm_i2c_encoder_register(struct module *owner,
 147                                            struct drm_i2c_encoder_driver *driver)
 148 {
 149         return i2c_register_driver(owner, &driver->i2c_driver);
 150 }
 151
 152 /**
 153  * drm_i2c_encoder_unregister - Unregister an I2C encoder driver
 154  * @driver:     Driver to be unregistered.
 155  */
 156 static inline void drm_i2c_encoder_unregister(struct drm_i2c_encoder_driver *driver)
 157 {
 158         i2c_del_driver(&driver->i2c_driver);
 159 }
 160
 161 void drm_i2c_encoder_destroy(struct drm_encoder *encoder);
 162
 163
 164 /*
 165  * Wrapper fxns which can be plugged in to drm_encoder_helper_funcs:
 166  */
 167
 168 void drm_i2c_encoder_dpms(struct drm_encoder *encoder, int mode);
 169 bool drm_i2c_encoder_mode_fixup(struct drm_encoder *encoder,
 170                 const struct drm_display_mode *mode,
 171                 struct drm_display_mode *adjusted_mode);
 172 void drm_i2c_encoder_prepare(struct drm_encoder *encoder);
 173 void drm_i2c_encoder_commit(struct drm_encoder *encoder);
 174 void drm_i2c_encoder_mode_set(struct drm_encoder *encoder,
 175                 struct drm_display_mode *mode,
 176                 struct drm_display_mode *adjusted_mode);
 177 enum drm_connector_status drm_i2c_encoder_detect(struct drm_encoder *encoder,
 178             struct drm_connector *connector);
 179 void drm_i2c_encoder_save(struct drm_encoder *encoder);
 180 void drm_i2c_encoder_restore(struct drm_encoder *encoder);
 181
 182
 183 #endif