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