cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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drm_encoder_slave.h (6590B)

      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/drm_crtc.h>
     31#include <drm/drm_encoder.h>
     32
     33/**
     34 * struct drm_encoder_slave_funcs - Entry points exposed by a slave encoder driver
     35 * @set_config:	Initialize any encoder-specific modesetting parameters.
     36 *		The meaning of the @params parameter is implementation
     37 *		dependent. It will usually be a structure with DVO port
     38 *		data format settings or timings. It's not required for
     39 *		the new parameters to take effect until the next mode
     40 *		is set.
     41 *
     42 * Most of its members are analogous to the function pointers in
     43 * &drm_encoder_helper_funcs and they can optionally be used to
     44 * initialize the latter. Connector-like methods (e.g. @get_modes and
     45 * @set_property) will typically be wrapped around and only be called
     46 * if the encoder is the currently selected one for the connector.
     47 */
     48struct drm_encoder_slave_funcs {
     49	void (*set_config)(struct drm_encoder *encoder,
     50			   void *params);
     51
     52	void (*destroy)(struct drm_encoder *encoder);
     53	void (*dpms)(struct drm_encoder *encoder, int mode);
     54	void (*save)(struct drm_encoder *encoder);
     55	void (*restore)(struct drm_encoder *encoder);
     56	bool (*mode_fixup)(struct drm_encoder *encoder,
     57			   const struct drm_display_mode *mode,
     58			   struct drm_display_mode *adjusted_mode);
     59	int (*mode_valid)(struct drm_encoder *encoder,
     60			  struct drm_display_mode *mode);
     61	void (*mode_set)(struct drm_encoder *encoder,
     62			 struct drm_display_mode *mode,
     63			 struct drm_display_mode *adjusted_mode);
     64
     65	enum drm_connector_status (*detect)(struct drm_encoder *encoder,
     66					    struct drm_connector *connector);
     67	int (*get_modes)(struct drm_encoder *encoder,
     68			 struct drm_connector *connector);
     69	int (*create_resources)(struct drm_encoder *encoder,
     70				 struct drm_connector *connector);
     71	int (*set_property)(struct drm_encoder *encoder,
     72			    struct drm_connector *connector,
     73			    struct drm_property *property,
     74			    uint64_t val);
     75
     76};
     77
     78/**
     79 * struct drm_encoder_slave - Slave encoder struct
     80 * @base: DRM encoder object.
     81 * @slave_funcs: Slave encoder callbacks.
     82 * @slave_priv: Slave encoder private data.
     83 * @bus_priv: Bus specific data.
     84 *
     85 * A &drm_encoder_slave has two sets of callbacks, @slave_funcs and the
     86 * ones in @base. The former are never actually called by the common
     87 * CRTC code, it's just a convenience for splitting the encoder
     88 * functions in an upper, GPU-specific layer and a (hopefully)
     89 * GPU-agnostic lower layer: It's the GPU driver responsibility to
     90 * call the slave methods when appropriate.
     91 *
     92 * drm_i2c_encoder_init() provides a way to get an implementation of
     93 * this.
     94 */
     95struct drm_encoder_slave {
     96	struct drm_encoder base;
     97
     98	const struct drm_encoder_slave_funcs *slave_funcs;
     99	void *slave_priv;
    100	void *bus_priv;
    101};
    102#define to_encoder_slave(x) container_of((x), struct drm_encoder_slave, base)
    103
    104int drm_i2c_encoder_init(struct drm_device *dev,
    105			 struct drm_encoder_slave *encoder,
    106			 struct i2c_adapter *adap,
    107			 const struct i2c_board_info *info);
    108
    109
    110/**
    111 * struct drm_i2c_encoder_driver
    112 *
    113 * Describes a device driver for an encoder connected to the GPU
    114 * through an I2C bus. In addition to the entry points in @i2c_driver
    115 * an @encoder_init function should be provided. It will be called to
    116 * give the driver an opportunity to allocate any per-encoder data
    117 * structures and to initialize the @slave_funcs and (optionally)
    118 * @slave_priv members of @encoder.
    119 */
    120struct drm_i2c_encoder_driver {
    121	struct i2c_driver i2c_driver;
    122
    123	int (*encoder_init)(struct i2c_client *client,
    124			    struct drm_device *dev,
    125			    struct drm_encoder_slave *encoder);
    126
    127};
    128#define to_drm_i2c_encoder_driver(x) container_of((x),			\
    129						  struct drm_i2c_encoder_driver, \
    130						  i2c_driver)
    131
    132/**
    133 * drm_i2c_encoder_get_client - Get the I2C client corresponding to an encoder
    134 */
    135static inline struct i2c_client *drm_i2c_encoder_get_client(struct drm_encoder *encoder)
    136{
    137	return (struct i2c_client *)to_encoder_slave(encoder)->bus_priv;
    138}
    139
    140/**
    141 * drm_i2c_encoder_register - Register an I2C encoder driver
    142 * @owner:	Module containing the driver.
    143 * @driver:	Driver to be registered.
    144 */
    145static inline int drm_i2c_encoder_register(struct module *owner,
    146					   struct drm_i2c_encoder_driver *driver)
    147{
    148	return i2c_register_driver(owner, &driver->i2c_driver);
    149}
    150
    151/**
    152 * drm_i2c_encoder_unregister - Unregister an I2C encoder driver
    153 * @driver:	Driver to be unregistered.
    154 */
    155static inline void drm_i2c_encoder_unregister(struct drm_i2c_encoder_driver *driver)
    156{
    157	i2c_del_driver(&driver->i2c_driver);
    158}
    159
    160void drm_i2c_encoder_destroy(struct drm_encoder *encoder);
    161
    162
    163/*
    164 * Wrapper fxns which can be plugged in to drm_encoder_helper_funcs:
    165 */
    166
    167void drm_i2c_encoder_dpms(struct drm_encoder *encoder, int mode);
    168bool drm_i2c_encoder_mode_fixup(struct drm_encoder *encoder,
    169		const struct drm_display_mode *mode,
    170		struct drm_display_mode *adjusted_mode);
    171void drm_i2c_encoder_prepare(struct drm_encoder *encoder);
    172void drm_i2c_encoder_commit(struct drm_encoder *encoder);
    173void drm_i2c_encoder_mode_set(struct drm_encoder *encoder,
    174		struct drm_display_mode *mode,
    175		struct drm_display_mode *adjusted_mode);
    176enum drm_connector_status drm_i2c_encoder_detect(struct drm_encoder *encoder,
    177	    struct drm_connector *connector);
    178void drm_i2c_encoder_save(struct drm_encoder *encoder);
    179void drm_i2c_encoder_restore(struct drm_encoder *encoder);
    180
    181
    182#endif