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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 __NOUVEAU_ENCODER_I2C_H__
#define __NOUVEAU_ENCODER_I2C_H__
#include <linux/i2c.h>
#include <drm/drm_crtc.h>
#include <drm/drm_encoder.h>
/**
* struct nouveau_i2c_encoder_funcs - Entry points exposed by a I2C encoder driver
*
* 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 nouveau_i2c_encoder_funcs {
/**
* @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.
*/
void (*set_config)(struct drm_encoder *encoder,
void *params);
/**
* @destroy: Analogous to &drm_encoder_funcs @destroy callback.
*/
void (*destroy)(struct drm_encoder *encoder);
/**
* @dpms: Analogous to &drm_encoder_helper_funcs @dpms callback.
*/
void (*dpms)(struct drm_encoder *encoder, int mode);
/**
* @save: Save state. Wrapped by nouveau_i2c_encoder_save().
*/
void (*save)(struct drm_encoder *encoder);
/**
* @restore: Restore state. Wrapped by nouveau_i2c_encoder_restore().
*/
void (*restore)(struct drm_encoder *encoder);
/**
* @mode_fixup: Analogous to &drm_encoder_helper_funcs @mode_fixup
* callback. Wrapped by nouveau_i2c_encoder_mode_fixup().
*/
bool (*mode_fixup)(struct drm_encoder *encoder,
const struct drm_display_mode *mode,
struct drm_display_mode *adjusted_mode);
/**
* @mode_valid: Analogous to &drm_encoder_helper_funcs @mode_valid.
*/
int (*mode_valid)(struct drm_encoder *encoder,
const struct drm_display_mode *mode);
/**
* @mode_set: Analogous to &drm_encoder_helper_funcs @mode_set
* callback.
*/
void (*mode_set)(struct drm_encoder *encoder,
struct drm_display_mode *mode,
struct drm_display_mode *adjusted_mode);
/**
* @detect: Analogous to &drm_encoder_helper_funcs @detect
* callback. Wrapped by nouveau_i2c_encoder_detect().
*/
enum drm_connector_status (*detect)(struct drm_encoder *encoder,
struct drm_connector *connector);
/**
* @get_modes: Get modes.
*/
int (*get_modes)(struct drm_encoder *encoder,
struct drm_connector *connector);
/**
* @create_resources: Create resources.
*/
int (*create_resources)(struct drm_encoder *encoder,
struct drm_connector *connector);
/**
* @set_property: Set property.
*/
int (*set_property)(struct drm_encoder *encoder,
struct drm_connector *connector,
struct drm_property *property,
uint64_t val);
};
/**
* struct nouveau_i2c_encoder - I2C encoder struct
*
* A &nouveau_i2c_encoder has two sets of callbacks, @encoder_i2c_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 nouveau_i2c_encoder methods when appropriate.
*
* nouveau_i2c_encoder_init() provides a way to get an implementation of
* this.
*/
struct nouveau_i2c_encoder {
/**
* @base: DRM encoder object.
*/
struct drm_encoder base;
/**
* @encoder_i2c_funcs: I2C encoder callbacks.
*/
const struct nouveau_i2c_encoder_funcs *encoder_i2c_funcs;
/**
* @encoder_i2c_priv: I2C encoder private data.
*/
void *encoder_i2c_priv;
/**
* @i2c_client: corresponding I2C client structure
*/
struct i2c_client *i2c_client;
};
#define to_encoder_i2c(x) container_of((x), struct nouveau_i2c_encoder, base)
int nouveau_i2c_encoder_init(struct drm_device *dev,
struct nouveau_i2c_encoder *encoder,
struct i2c_adapter *adap,
const struct i2c_board_info *info);
static inline const struct nouveau_i2c_encoder_funcs *
get_encoder_i2c_funcs(struct drm_encoder *enc)
{
return to_encoder_i2c(enc)->encoder_i2c_funcs;
}
/**
* struct nouveau_i2c_encoder_driver
*
* Describes a device driver for an encoder connected to the GPU through an I2C
* bus.
*/
struct nouveau_i2c_encoder_driver {
/**
* @i2c_driver: I2C device driver description.
*/
struct i2c_driver i2c_driver;
/**
* @encoder_init: Callback to allocate any per-encoder data structures
* and to initialize the @encoder_i2c_funcs and (optionally) @encoder_i2c_priv
* members of @encoder.
*/
int (*encoder_init)(struct i2c_client *client,
struct drm_device *dev,
struct nouveau_i2c_encoder *encoder);
};
#define to_nouveau_i2c_encoder_driver(x) container_of((x), \
struct nouveau_i2c_encoder_driver, \
i2c_driver)
/**
* nouveau_i2c_encoder_get_client - Get the I2C client corresponding to an encoder
* @encoder: The encoder
*/
static inline struct i2c_client *nouveau_i2c_encoder_get_client(struct drm_encoder *encoder)
{
return to_encoder_i2c(encoder)->i2c_client;
}
void nouveau_i2c_encoder_destroy(struct drm_encoder *encoder);
/*
* Wrapper fxns which can be plugged in to drm_encoder_helper_funcs:
*/
bool nouveau_i2c_encoder_mode_fixup(struct drm_encoder *encoder,
const struct drm_display_mode *mode,
struct drm_display_mode *adjusted_mode);
enum drm_connector_status nouveau_i2c_encoder_detect(struct drm_encoder *encoder,
struct drm_connector *connector);
void nouveau_i2c_encoder_save(struct drm_encoder *encoder);
void nouveau_i2c_encoder_restore(struct drm_encoder *encoder);
#endif
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