221 lines
6.8 KiB
C
221 lines
6.8 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 __NOUVEAU_ENCODER_I2C_H__
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#define __NOUVEAU_ENCODER_I2C_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 nouveau_i2c_encoder_funcs - Entry points exposed by a I2C encoder driver
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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 nouveau_i2c_encoder_funcs {
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/**
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* @set_config: Initialize any encoder-specific modesetting parameters.
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* The meaning of the @params parameter is implementation dependent. It
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* will usually be a structure with DVO port data format settings or
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* timings. It's not required for the new parameters to take effect
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* until the next mode is set.
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*/
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void (*set_config)(struct drm_encoder *encoder,
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void *params);
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/**
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* @destroy: Analogous to &drm_encoder_funcs @destroy callback.
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*/
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void (*destroy)(struct drm_encoder *encoder);
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/**
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* @dpms: Analogous to &drm_encoder_helper_funcs @dpms callback.
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*/
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void (*dpms)(struct drm_encoder *encoder, int mode);
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/**
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* @save: Save state. Wrapped by nouveau_i2c_encoder_save().
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*/
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void (*save)(struct drm_encoder *encoder);
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/**
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* @restore: Restore state. Wrapped by nouveau_i2c_encoder_restore().
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*/
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void (*restore)(struct drm_encoder *encoder);
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/**
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* @mode_fixup: Analogous to &drm_encoder_helper_funcs @mode_fixup
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* callback. Wrapped by nouveau_i2c_encoder_mode_fixup().
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*/
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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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/**
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* @mode_valid: Analogous to &drm_encoder_helper_funcs @mode_valid.
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*/
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int (*mode_valid)(struct drm_encoder *encoder,
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const struct drm_display_mode *mode);
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/**
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* @mode_set: Analogous to &drm_encoder_helper_funcs @mode_set
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* callback.
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*/
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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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/**
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* @detect: Analogous to &drm_encoder_helper_funcs @detect
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* callback. Wrapped by nouveau_i2c_encoder_detect().
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*/
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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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/**
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* @get_modes: Get modes.
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*/
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int (*get_modes)(struct drm_encoder *encoder,
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struct drm_connector *connector);
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/**
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* @create_resources: Create resources.
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*/
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int (*create_resources)(struct drm_encoder *encoder,
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struct drm_connector *connector);
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/**
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* @set_property: Set property.
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*/
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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 nouveau_i2c_encoder - I2C encoder struct
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*
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* A &nouveau_i2c_encoder has two sets of callbacks, @encoder_i2c_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 nouveau_i2c_encoder methods when appropriate.
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*
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* nouveau_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 nouveau_i2c_encoder {
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/**
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* @base: DRM encoder object.
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*/
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struct drm_encoder base;
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/**
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* @encoder_i2c_funcs: I2C encoder callbacks.
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*/
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const struct nouveau_i2c_encoder_funcs *encoder_i2c_funcs;
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/**
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* @encoder_i2c_priv: I2C encoder private data.
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*/
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void *encoder_i2c_priv;
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/**
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* @i2c_client: corresponding I2C client structure
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*/
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struct i2c_client *i2c_client;
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};
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#define to_encoder_i2c(x) container_of((x), struct nouveau_i2c_encoder, base)
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int nouveau_i2c_encoder_init(struct drm_device *dev,
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struct nouveau_i2c_encoder *encoder,
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struct i2c_adapter *adap,
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const struct i2c_board_info *info);
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static inline const struct nouveau_i2c_encoder_funcs *
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get_encoder_i2c_funcs(struct drm_encoder *enc)
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{
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return to_encoder_i2c(enc)->encoder_i2c_funcs;
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}
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/**
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* struct nouveau_i2c_encoder_driver
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*
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* Describes a device driver for an encoder connected to the GPU through an I2C
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* bus.
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*/
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struct nouveau_i2c_encoder_driver {
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/**
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* @i2c_driver: I2C device driver description.
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*/
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struct i2c_driver i2c_driver;
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/**
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* @encoder_init: Callback to allocate any per-encoder data structures
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* and to initialize the @encoder_i2c_funcs and (optionally) @encoder_i2c_priv
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* members of @encoder.
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*/
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int (*encoder_init)(struct i2c_client *client,
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struct drm_device *dev,
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struct nouveau_i2c_encoder *encoder);
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};
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#define to_nouveau_i2c_encoder_driver(x) container_of((x), \
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struct nouveau_i2c_encoder_driver, \
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i2c_driver)
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/**
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* nouveau_i2c_encoder_get_client - Get the I2C client corresponding to an encoder
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* @encoder: The encoder
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*/
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static inline struct i2c_client *nouveau_i2c_encoder_get_client(struct drm_encoder *encoder)
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{
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return to_encoder_i2c(encoder)->i2c_client;
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}
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void nouveau_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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bool nouveau_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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enum drm_connector_status nouveau_i2c_encoder_detect(struct drm_encoder *encoder,
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struct drm_connector *connector);
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void nouveau_i2c_encoder_save(struct drm_encoder *encoder);
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void nouveau_i2c_encoder_restore(struct drm_encoder *encoder);
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#endif
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