CoCalc -- drm_dp_dual_mode

GitHub Repository: torvalds/linux
Path: blob/master/include/drm/display/drm_dp_dual_mode_helper.h
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/*
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 * Copyright © 2016 Intel Corporation
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 *
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 * Permission is hereby granted, free of charge, to any person obtaining a
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 * copy of this software and associated documentation files (the "Software"),
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 * to deal in the Software without restriction, including without limitation
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 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
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 * and/or sell copies of the Software, and to permit persons to whom the
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 * Software is furnished to do so, subject to the following conditions:
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 *
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 * The above copyright notice and this permission notice shall be included in
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 * all copies or substantial portions of the Software.
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 *
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 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
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 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
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 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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 * OTHER DEALINGS IN THE SOFTWARE.
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 */
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#ifndef DRM_DP_DUAL_MODE_HELPER_H
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#define DRM_DP_DUAL_MODE_HELPER_H
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#include <linux/types.h>
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/*
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 * Optional for type 1 DVI adaptors
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 * Mandatory for type 1 HDMI and type 2 adaptors
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 */
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#define DP_DUAL_MODE_HDMI_ID 0x00 /* 00-0f */
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#define  DP_DUAL_MODE_HDMI_ID_LEN 16
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/*
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 * Optional for type 1 adaptors
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 * Mandatory for type 2 adaptors
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 */
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#define DP_DUAL_MODE_ADAPTOR_ID 0x10
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#define  DP_DUAL_MODE_REV_MASK 0x07
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#define  DP_DUAL_MODE_REV_TYPE2 0x00
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#define  DP_DUAL_MODE_TYPE_MASK 0xf0
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#define  DP_DUAL_MODE_TYPE_TYPE2 0xa0
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/* This field is marked reserved in dual mode spec, used in LSPCON */
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#define  DP_DUAL_MODE_TYPE_HAS_DPCD 0x08
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#define DP_DUAL_MODE_IEEE_OUI 0x11 /* 11-13*/
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#define  DP_DUAL_IEEE_OUI_LEN 3
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#define DP_DUAL_DEVICE_ID 0x14 /* 14-19 */
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#define  DP_DUAL_DEVICE_ID_LEN 6
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#define DP_DUAL_MODE_HARDWARE_REV 0x1a
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#define DP_DUAL_MODE_FIRMWARE_MAJOR_REV 0x1b
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#define DP_DUAL_MODE_FIRMWARE_MINOR_REV 0x1c
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#define DP_DUAL_MODE_MAX_TMDS_CLOCK 0x1d
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#define DP_DUAL_MODE_I2C_SPEED_CAP 0x1e
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#define DP_DUAL_MODE_TMDS_OEN 0x20
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#define  DP_DUAL_MODE_TMDS_DISABLE 0x01
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#define DP_DUAL_MODE_HDMI_PIN_CTRL 0x21
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#define  DP_DUAL_MODE_CEC_ENABLE 0x01
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#define DP_DUAL_MODE_I2C_SPEED_CTRL 0x22
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/* LSPCON specific registers, defined by MCA */
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#define DP_DUAL_MODE_LSPCON_MODE_CHANGE		0x40
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#define DP_DUAL_MODE_LSPCON_CURRENT_MODE		0x41
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#define  DP_DUAL_MODE_LSPCON_MODE_PCON			0x1
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struct drm_device;
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struct i2c_adapter;
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ssize_t drm_dp_dual_mode_read(struct i2c_adapter *adapter,
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			      u8 offset, void *buffer, size_t size);
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ssize_t drm_dp_dual_mode_write(struct i2c_adapter *adapter,
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			       u8 offset, const void *buffer, size_t size);
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/**
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 * enum drm_lspcon_mode
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 * @DRM_LSPCON_MODE_INVALID: No LSPCON.
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 * @DRM_LSPCON_MODE_LS: Level shifter mode of LSPCON
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 *	which drives DP++ to HDMI 1.4 conversion.
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 * @DRM_LSPCON_MODE_PCON: Protocol converter mode of LSPCON
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 *	which drives DP++ to HDMI 2.0 active conversion.
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 */
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enum drm_lspcon_mode {
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	DRM_LSPCON_MODE_INVALID,
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	DRM_LSPCON_MODE_LS,
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	DRM_LSPCON_MODE_PCON,
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};
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/**
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 * enum drm_dp_dual_mode_type - Type of the DP dual mode adaptor
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 * @DRM_DP_DUAL_MODE_NONE: No DP dual mode adaptor
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 * @DRM_DP_DUAL_MODE_UNKNOWN: Could be either none or type 1 DVI adaptor
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 * @DRM_DP_DUAL_MODE_TYPE1_DVI: Type 1 DVI adaptor
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 * @DRM_DP_DUAL_MODE_TYPE1_HDMI: Type 1 HDMI adaptor
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 * @DRM_DP_DUAL_MODE_TYPE2_DVI: Type 2 DVI adaptor
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 * @DRM_DP_DUAL_MODE_TYPE2_HDMI: Type 2 HDMI adaptor
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 * @DRM_DP_DUAL_MODE_LSPCON: Level shifter / protocol converter
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 */
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enum drm_dp_dual_mode_type {
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	DRM_DP_DUAL_MODE_NONE,
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	DRM_DP_DUAL_MODE_UNKNOWN,
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	DRM_DP_DUAL_MODE_TYPE1_DVI,
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	DRM_DP_DUAL_MODE_TYPE1_HDMI,
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	DRM_DP_DUAL_MODE_TYPE2_DVI,
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	DRM_DP_DUAL_MODE_TYPE2_HDMI,
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	DRM_DP_DUAL_MODE_LSPCON,
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};
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enum drm_dp_dual_mode_type
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drm_dp_dual_mode_detect(const struct drm_device *dev, struct i2c_adapter *adapter);
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int drm_dp_dual_mode_max_tmds_clock(const struct drm_device *dev, enum drm_dp_dual_mode_type type,
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				    struct i2c_adapter *adapter);
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int drm_dp_dual_mode_get_tmds_output(const struct drm_device *dev, enum drm_dp_dual_mode_type type,
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				     struct i2c_adapter *adapter, bool *enabled);
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int drm_dp_dual_mode_set_tmds_output(const struct drm_device *dev, enum drm_dp_dual_mode_type type,
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				     struct i2c_adapter *adapter, bool enable);
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const char *drm_dp_get_dual_mode_type_name(enum drm_dp_dual_mode_type type);
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int drm_lspcon_get_mode(const struct drm_device *dev, struct i2c_adapter *adapter,
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			enum drm_lspcon_mode *current_mode);
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int drm_lspcon_set_mode(const struct drm_device *dev, struct i2c_adapter *adapter,
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			enum drm_lspcon_mode reqd_mode, int time_out);
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#endif
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