1/*
  2 * Copyright © 2016 Intel Corporation
  3 *
  4 * Permission is hereby granted, free of charge, to any person obtaining a
  5 * copy of this software and associated documentation files (the "Software"),
  6 * to deal in the Software without restriction, including without limitation
  7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  8 * and/or sell copies of the Software, and to permit persons to whom the
  9 * Software is furnished to do so, subject to the following conditions:
 10 *
 11 * The above copyright notice and this permission notice shall be included in
 12 * all copies or substantial portions of the Software.
 13 *
 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
 18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 20 * OTHER DEALINGS IN THE SOFTWARE.
 21 */
 22
 23#ifndef DRM_DP_DUAL_MODE_HELPER_H
 24#define DRM_DP_DUAL_MODE_HELPER_H
 25
 26#include <linux/types.h>
 27
 28/*
 29 * Optional for type 1 DVI adaptors
 30 * Mandatory for type 1 HDMI and type 2 adaptors
 31 */
 32#define DP_DUAL_MODE_HDMI_ID 0x00 /* 00-0f */
 33#define  DP_DUAL_MODE_HDMI_ID_LEN 16
 34/*
 35 * Optional for type 1 adaptors
 36 * Mandatory for type 2 adaptors
 37 */
 38#define DP_DUAL_MODE_ADAPTOR_ID 0x10
 39#define  DP_DUAL_MODE_REV_MASK 0x07
 40#define  DP_DUAL_MODE_REV_TYPE2 0x00
 41#define  DP_DUAL_MODE_TYPE_MASK 0xf0
 42#define  DP_DUAL_MODE_TYPE_TYPE2 0xa0
 43/* This field is marked reserved in dual mode spec, used in LSPCON */
 44#define  DP_DUAL_MODE_TYPE_HAS_DPCD 0x08
 45#define DP_DUAL_MODE_IEEE_OUI 0x11 /* 11-13*/
 46#define  DP_DUAL_IEEE_OUI_LEN 3
 47#define DP_DUAL_DEVICE_ID 0x14 /* 14-19 */
 48#define  DP_DUAL_DEVICE_ID_LEN 6
 49#define DP_DUAL_MODE_HARDWARE_REV 0x1a
 50#define DP_DUAL_MODE_FIRMWARE_MAJOR_REV 0x1b
 51#define DP_DUAL_MODE_FIRMWARE_MINOR_REV 0x1c
 52#define DP_DUAL_MODE_MAX_TMDS_CLOCK 0x1d
 53#define DP_DUAL_MODE_I2C_SPEED_CAP 0x1e
 54#define DP_DUAL_MODE_TMDS_OEN 0x20
 55#define  DP_DUAL_MODE_TMDS_DISABLE 0x01
 56#define DP_DUAL_MODE_HDMI_PIN_CTRL 0x21
 57#define  DP_DUAL_MODE_CEC_ENABLE 0x01
 58#define DP_DUAL_MODE_I2C_SPEED_CTRL 0x22
 59
 60/* LSPCON specific registers, defined by MCA */
 61#define DP_DUAL_MODE_LSPCON_MODE_CHANGE		0x40
 62#define DP_DUAL_MODE_LSPCON_CURRENT_MODE		0x41
 63#define  DP_DUAL_MODE_LSPCON_MODE_PCON			0x1
 64
 65struct drm_device;
 66struct i2c_adapter;
 67
 68ssize_t drm_dp_dual_mode_read(struct i2c_adapter *adapter,
 69			      u8 offset, void *buffer, size_t size);
 70ssize_t drm_dp_dual_mode_write(struct i2c_adapter *adapter,
 71			       u8 offset, const void *buffer, size_t size);
 72
 73/**
 74 * enum drm_lspcon_mode
 75 * @DRM_LSPCON_MODE_INVALID: No LSPCON.
 76 * @DRM_LSPCON_MODE_LS: Level shifter mode of LSPCON
 77 *	which drives DP++ to HDMI 1.4 conversion.
 78 * @DRM_LSPCON_MODE_PCON: Protocol converter mode of LSPCON
 79 *	which drives DP++ to HDMI 2.0 active conversion.
 80 */
 81enum drm_lspcon_mode {
 82	DRM_LSPCON_MODE_INVALID,
 83	DRM_LSPCON_MODE_LS,
 84	DRM_LSPCON_MODE_PCON,
 85};
 86
 87/**
 88 * enum drm_dp_dual_mode_type - Type of the DP dual mode adaptor
 89 * @DRM_DP_DUAL_MODE_NONE: No DP dual mode adaptor
 90 * @DRM_DP_DUAL_MODE_UNKNOWN: Could be either none or type 1 DVI adaptor
 91 * @DRM_DP_DUAL_MODE_TYPE1_DVI: Type 1 DVI adaptor
 92 * @DRM_DP_DUAL_MODE_TYPE1_HDMI: Type 1 HDMI adaptor
 93 * @DRM_DP_DUAL_MODE_TYPE2_DVI: Type 2 DVI adaptor
 94 * @DRM_DP_DUAL_MODE_TYPE2_HDMI: Type 2 HDMI adaptor
 95 * @DRM_DP_DUAL_MODE_LSPCON: Level shifter / protocol converter
 96 */
 97enum drm_dp_dual_mode_type {
 98	DRM_DP_DUAL_MODE_NONE,
 99	DRM_DP_DUAL_MODE_UNKNOWN,
100	DRM_DP_DUAL_MODE_TYPE1_DVI,
101	DRM_DP_DUAL_MODE_TYPE1_HDMI,
102	DRM_DP_DUAL_MODE_TYPE2_DVI,
103	DRM_DP_DUAL_MODE_TYPE2_HDMI,
104	DRM_DP_DUAL_MODE_LSPCON,
105};
106
107enum drm_dp_dual_mode_type
108drm_dp_dual_mode_detect(const struct drm_device *dev, struct i2c_adapter *adapter);
109int drm_dp_dual_mode_max_tmds_clock(const struct drm_device *dev, enum drm_dp_dual_mode_type type,
110				    struct i2c_adapter *adapter);
111int drm_dp_dual_mode_get_tmds_output(const struct drm_device *dev, enum drm_dp_dual_mode_type type,
112				     struct i2c_adapter *adapter, bool *enabled);
113int drm_dp_dual_mode_set_tmds_output(const struct drm_device *dev, enum drm_dp_dual_mode_type type,
114				     struct i2c_adapter *adapter, bool enable);
115const char *drm_dp_get_dual_mode_type_name(enum drm_dp_dual_mode_type type);
116
117int drm_lspcon_get_mode(const struct drm_device *dev, struct i2c_adapter *adapter,
118			enum drm_lspcon_mode *current_mode);
119int drm_lspcon_set_mode(const struct drm_device *dev, struct i2c_adapter *adapter,
120			enum drm_lspcon_mode reqd_mode);
121#endif