drivers/gpu/drm/amd/display/dc/i2caux/dce80/i2c_hw_engine_dce80.h

   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
  26 #ifndef __DAL_I2C_HW_ENGINE_DCE80_H__
  27 #define __DAL_I2C_HW_ENGINE_DCE80_H__
  28
  29 struct i2c_hw_engine_dce80 {
  30         struct i2c_hw_engine base;
  31         struct {
  32                 uint32_t DC_I2C_DDCX_SETUP;
  33                 uint32_t DC_I2C_DDCX_SPEED;
  34         } addr;
  35         uint32_t engine_id;
  36         /* expressed in kilohertz */
  37         uint32_t reference_frequency;
  38         /* number of bytes currently used in HW buffer */
  39         uint32_t buffer_used_bytes;
  40         /* number of pending transactions (before GO) */
  41         uint32_t transaction_count;
  42         uint32_t engine_keep_power_up_count;
  43 };
  44
  45 struct i2c_hw_engine_dce80_create_arg {
  46         uint32_t engine_id;
  47         uint32_t reference_frequency;
  48         uint32_t default_speed;
  49         struct dc_context *ctx;
  50 };
  51
  52 struct i2c_engine *dal_i2c_hw_engine_dce80_create(
  53         const struct i2c_hw_engine_dce80_create_arg *arg);
  54 #endif