drivers/gpu/drm/amd/display/dc/dce/dce_i2c_sw.h

   1 /*
   2  * Copyright 2018 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 __DCE_I2C_SW_H__
  27 #define __DCE_I2C_SW_H__
  28
  29 enum {
  30         DCE_I2C_DEFAULT_I2C_SW_SPEED = 50,
  31         I2C_SW_RETRIES = 10,
  32         I2C_SW_TIMEOUT_DELAY = 3000,
  33 };
  34
  35 struct dce_i2c_sw {
  36         struct ddc *ddc;
  37         struct dc_context *ctx;
  38         uint32_t clock_delay;
  39         uint32_t speed;
  40 };
  41
  42 void dce_i2c_sw_construct(
  43         struct dce_i2c_sw *dce_i2c_sw,
  44         struct dc_context *ctx);
  45
  46 bool dce_i2c_submit_command_sw(
  47         struct resource_pool *pool,
  48         struct ddc *ddc,
  49         struct i2c_command *cmd,
  50         struct dce_i2c_sw *dce_i2c_sw);
  51
  52 bool dce_i2c_engine_acquire_sw(
  53         struct dce_i2c_sw *dce_i2c_sw,
  54         struct ddc *ddc_handle);
  55
  56 #endif
  57