LXR linux/include/drm/drm_encoder

   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 */
  49struct 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 */
  96struct 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
 105int 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 */
 121struct 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 */
 136static 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 */
 146static 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 */
 156static inline void drm_i2c_encoder_unregister(struct drm_i2c_encoder_driver *driver)
 157{
 158        i2c_del_driver(&driver->i2c_driver);
 159}
 160
 161void 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
 168void drm_i2c_encoder_dpms(struct drm_encoder *encoder, int mode);
 169bool drm_i2c_encoder_mode_fixup(struct drm_encoder *encoder,
 170                const struct drm_display_mode *mode,
 171                struct drm_display_mode *adjusted_mode);
 172void drm_i2c_encoder_prepare(struct drm_encoder *encoder);
 173void drm_i2c_encoder_commit(struct drm_encoder *encoder);
 174void drm_i2c_encoder_mode_set(struct drm_encoder *encoder,
 175                struct drm_display_mode *mode,
 176                struct drm_display_mode *adjusted_mode);
 177enum drm_connector_status drm_i2c_encoder_detect(struct drm_encoder *encoder,
 178            struct drm_connector *connector);
 179void drm_i2c_encoder_save(struct drm_encoder *encoder);
 180void drm_i2c_encoder_restore(struct drm_encoder *encoder);
 181
 182
 183#endif
 184