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/*
* Copyright (C) 2009 Francisco Jerez.
* All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial
* portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
*/
#ifndef __DRM_ENCODER_SLAVE_H__
#define __DRM_ENCODER_SLAVE_H__
#include <linux/i2c.h>
#include <drm/drm_crtc.h>
#include <drm/drm_encoder.h>
/**
* struct drm_encoder_slave_funcs - Entry points exposed by a slave encoder driver
* @set_config: Initialize any encoder-specific modesetting parameters.
* The meaning of the @params parameter is implementation
* dependent. It will usually be a structure with DVO port
* data format settings or timings. It's not required for
* the new parameters to take effect until the next mode
* is set.
*
* Most of its members are analogous to the function pointers in
* &drm_encoder_helper_funcs and they can optionally be used to
* initialize the latter. Connector-like methods (e.g. @get_modes and
* @set_property) will typically be wrapped around and only be called
* if the encoder is the currently selected one for the connector.
*/
struct drm_encoder_slave_funcs {
void (*set_config)(struct drm_encoder *encoder,
void *params);
void (*destroy)(struct drm_encoder *encoder);
void (*dpms)(struct drm_encoder *encoder, int mode);
void (*save)(struct drm_encoder *encoder);
void (*restore)(struct drm_encoder *encoder);
bool (*mode_fixup)(struct drm_encoder *encoder,
const struct drm_display_mode *mode,
struct drm_display_mode *adjusted_mode);
int (*mode_valid)(struct drm_encoder *encoder,
struct drm_display_mode *mode);
void (*mode_set)(struct drm_encoder *encoder,
struct drm_display_mode *mode,
struct drm_display_mode *adjusted_mode);
enum drm_connector_status (*detect)(struct drm_encoder *encoder,
struct drm_connector *connector);
int (*get_modes)(struct drm_encoder *encoder,
struct drm_connector *connector);
int (*create_resources)(struct drm_encoder *encoder,
struct drm_connector *connector);
int (*set_property)(struct drm_encoder *encoder,
struct drm_connector *connector,
struct drm_property *property,
uint64_t val);
};
/**
* struct drm_encoder_slave - Slave encoder struct
* @base: DRM encoder object.
* @slave_funcs: Slave encoder callbacks.
* @slave_priv: Slave encoder private data.
* @bus_priv: Bus specific data.
*
* A &drm_encoder_slave has two sets of callbacks, @slave_funcs and the
* ones in @base. The former are never actually called by the common
* CRTC code, it's just a convenience for splitting the encoder
* functions in an upper, GPU-specific layer and a (hopefully)
* GPU-agnostic lower layer: It's the GPU driver responsibility to
* call the slave methods when appropriate.
*
* drm_i2c_encoder_init() provides a way to get an implementation of
* this.
*/
struct drm_encoder_slave {
struct drm_encoder base;
const struct drm_encoder_slave_funcs *slave_funcs;
void *slave_priv;
void *bus_priv;
};
#define to_encoder_slave(x) container_of((x), struct drm_encoder_slave, base)
int drm_i2c_encoder_init(struct drm_device *dev,
struct drm_encoder_slave *encoder,
struct i2c_adapter *adap,
const struct i2c_board_info *info);
/**
* struct drm_i2c_encoder_driver
*
* Describes a device driver for an encoder connected to the GPU
* through an I2C bus. In addition to the entry points in @i2c_driver
* an @encoder_init function should be provided. It will be called to
* give the driver an opportunity to allocate any per-encoder data
* structures and to initialize the @slave_funcs and (optionally)
* @slave_priv members of @encoder.
*/
struct drm_i2c_encoder_driver {
struct i2c_driver i2c_driver;
int (*encoder_init)(struct i2c_client *client,
struct drm_device *dev,
struct drm_encoder_slave *encoder);
};
#define to_drm_i2c_encoder_driver(x) container_of((x), \
struct drm_i2c_encoder_driver, \
i2c_driver)
/**
* drm_i2c_encoder_get_client - Get the I2C client corresponding to an encoder
*/
static inline struct i2c_client *drm_i2c_encoder_get_client(struct drm_encoder *encoder)
{
return (struct i2c_client *)to_encoder_slave(encoder)->bus_priv;
}
/**
* drm_i2c_encoder_register - Register an I2C encoder driver
* @owner: Module containing the driver.
* @driver: Driver to be registered.
*/
static inline int drm_i2c_encoder_register(struct module *owner,
struct drm_i2c_encoder_driver *driver)
{
return i2c_register_driver(owner, &driver->i2c_driver);
}
/**
* drm_i2c_encoder_unregister - Unregister an I2C encoder driver
* @driver: Driver to be unregistered.
*/
static inline void drm_i2c_encoder_unregister(struct drm_i2c_encoder_driver *driver)
{
i2c_del_driver(&driver->i2c_driver);
}
void drm_i2c_encoder_destroy(struct drm_encoder *encoder);
/*
* Wrapper fxns which can be plugged in to drm_encoder_helper_funcs:
*/
void drm_i2c_encoder_dpms(struct drm_encoder *encoder, int mode);
bool drm_i2c_encoder_mode_fixup(struct drm_encoder *encoder,
const struct drm_display_mode *mode,
struct drm_display_mode *adjusted_mode);
void drm_i2c_encoder_prepare(struct drm_encoder *encoder);
void drm_i2c_encoder_commit(struct drm_encoder *encoder);
void drm_i2c_encoder_mode_set(struct drm_encoder *encoder,
struct drm_display_mode *mode,
struct drm_display_mode *adjusted_mode);
enum drm_connector_status drm_i2c_encoder_detect(struct drm_encoder *encoder,
struct drm_connector *connector);
void drm_i2c_encoder_save(struct drm_encoder *encoder);
void drm_i2c_encoder_restore(struct drm_encoder *encoder);
#endif
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