root/drivers/gpu/drm/amd/display/dc/dc_ddc_types.h

INCLUDED FROM

   1 /*
   2  * Copyright 2012-15 Advanced Micro Devices, Inc.
   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  * Authors: AMD
  23  *
  24  */
  25 #ifndef DC_DDC_TYPES_H_
  26 #define DC_DDC_TYPES_H_
  27 
  28 enum aux_transaction_type {
  29         AUX_TRANSACTION_TYPE_DP,
  30         AUX_TRANSACTION_TYPE_I2C
  31 };
  32 
  33 
  34 enum i2caux_transaction_action {
  35         I2CAUX_TRANSACTION_ACTION_I2C_WRITE = 0x00,
  36         I2CAUX_TRANSACTION_ACTION_I2C_READ = 0x10,
  37         I2CAUX_TRANSACTION_ACTION_I2C_STATUS_REQUEST = 0x20,
  38 
  39         I2CAUX_TRANSACTION_ACTION_I2C_WRITE_MOT = 0x40,
  40         I2CAUX_TRANSACTION_ACTION_I2C_READ_MOT = 0x50,
  41         I2CAUX_TRANSACTION_ACTION_I2C_STATUS_REQUEST_MOT = 0x60,
  42 
  43         I2CAUX_TRANSACTION_ACTION_DP_WRITE = 0x80,
  44         I2CAUX_TRANSACTION_ACTION_DP_READ = 0x90
  45 };
  46 
  47 enum aux_channel_operation_result {
  48         AUX_CHANNEL_OPERATION_SUCCEEDED,
  49         AUX_CHANNEL_OPERATION_FAILED_REASON_UNKNOWN,
  50         AUX_CHANNEL_OPERATION_FAILED_INVALID_REPLY,
  51         AUX_CHANNEL_OPERATION_FAILED_TIMEOUT,
  52         AUX_CHANNEL_OPERATION_FAILED_HPD_DISCON
  53 };
  54 
  55 
  56 struct aux_request_transaction_data {
  57         enum aux_transaction_type type;
  58         enum i2caux_transaction_action action;
  59         /* 20-bit AUX channel transaction address */
  60         uint32_t address;
  61         /* delay, in 100-microsecond units */
  62         uint8_t delay;
  63         uint32_t length;
  64         uint8_t *data;
  65 };
  66 
  67 enum aux_transaction_reply {
  68         AUX_TRANSACTION_REPLY_AUX_ACK = 0x00,
  69         AUX_TRANSACTION_REPLY_AUX_NACK = 0x01,
  70         AUX_TRANSACTION_REPLY_AUX_DEFER = 0x02,
  71         AUX_TRANSACTION_REPLY_I2C_OVER_AUX_NACK = 0x04,
  72         AUX_TRANSACTION_REPLY_I2C_OVER_AUX_DEFER = 0x08,
  73 
  74         AUX_TRANSACTION_REPLY_I2C_ACK = 0x00,
  75         AUX_TRANSACTION_REPLY_I2C_NACK = 0x10,
  76         AUX_TRANSACTION_REPLY_I2C_DEFER = 0x20,
  77 
  78         AUX_TRANSACTION_REPLY_HPD_DISCON = 0x40,
  79 
  80         AUX_TRANSACTION_REPLY_INVALID = 0xFF
  81 };
  82 
  83 struct aux_reply_transaction_data {
  84         enum aux_transaction_reply status;
  85         uint32_t length;
  86         uint8_t *data;
  87 };
  88 
  89 struct i2c_payload {
  90         bool write;
  91         uint8_t address;
  92         uint32_t length;
  93         uint8_t *data;
  94 };
  95 
  96 enum i2c_command_engine {
  97         I2C_COMMAND_ENGINE_DEFAULT,
  98         I2C_COMMAND_ENGINE_SW,
  99         I2C_COMMAND_ENGINE_HW
 100 };
 101 
 102 struct i2c_command {
 103         struct i2c_payload *payloads;
 104         uint8_t number_of_payloads;
 105 
 106         enum i2c_command_engine engine;
 107 
 108         /* expressed in KHz
 109          * zero means "use default value" */
 110         uint32_t speed;
 111 };
 112 
 113 struct gpio_ddc_hw_info {
 114         bool hw_supported;
 115         uint32_t ddc_channel;
 116 };
 117 
 118 struct ddc {
 119         struct gpio *pin_data;
 120         struct gpio *pin_clock;
 121         struct gpio_ddc_hw_info hw_info;
 122         struct dc_context *ctx;
 123 };
 124 
 125 union ddc_wa {
 126         struct {
 127                 uint32_t DP_SKIP_POWER_OFF:1;
 128                 uint32_t DP_AUX_POWER_UP_WA_DELAY:1;
 129         } bits;
 130         uint32_t raw;
 131 };
 132 
 133 struct ddc_flags {
 134         uint8_t EDID_QUERY_DONE_ONCE:1;
 135         uint8_t IS_INTERNAL_DISPLAY:1;
 136         uint8_t FORCE_READ_REPEATED_START:1;
 137         uint8_t EDID_STRESS_READ:1;
 138 
 139 };
 140 
 141 enum ddc_transaction_type {
 142         DDC_TRANSACTION_TYPE_NONE = 0,
 143         DDC_TRANSACTION_TYPE_I2C,
 144         DDC_TRANSACTION_TYPE_I2C_OVER_AUX,
 145         DDC_TRANSACTION_TYPE_I2C_OVER_AUX_WITH_DEFER,
 146         DDC_TRANSACTION_TYPE_I2C_OVER_AUX_RETRY_DEFER
 147 };
 148 
 149 enum display_dongle_type {
 150         DISPLAY_DONGLE_NONE = 0,
 151         /* Active converter types*/
 152         DISPLAY_DONGLE_DP_VGA_CONVERTER,
 153         DISPLAY_DONGLE_DP_DVI_CONVERTER,
 154         DISPLAY_DONGLE_DP_HDMI_CONVERTER,
 155         /* DP-HDMI/DVI passive dongles (Type 1 and Type 2)*/
 156         DISPLAY_DONGLE_DP_DVI_DONGLE,
 157         DISPLAY_DONGLE_DP_HDMI_DONGLE,
 158         /* Other types of dongle*/
 159         DISPLAY_DONGLE_DP_HDMI_MISMATCHED_DONGLE,
 160 };
 161 
 162 struct ddc_service {
 163         struct ddc *ddc_pin;
 164         struct ddc_flags flags;
 165         union ddc_wa wa;
 166         enum ddc_transaction_type transaction_type;
 167         enum display_dongle_type dongle_type;
 168         struct dc_context *ctx;
 169         struct dc_link *link;
 170 
 171         uint32_t address;
 172         uint32_t edid_buf_len;
 173         uint8_t edid_buf[DC_MAX_EDID_BUFFER_SIZE];
 174 };
 175 
 176 #endif /* DC_DDC_TYPES_H_ */