LXR linux/drivers/gpu/drm/amd/display/dc/dce/dce

   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#include "dce_i2c.h"
  26#include "reg_helper.h"
  27
  28bool dce_i2c_submit_command(
  29        struct resource_pool *pool,
  30        struct ddc *ddc,
  31        struct i2c_command *cmd)
  32{
  33        struct dce_i2c_hw *dce_i2c_hw;
  34        struct dce_i2c_sw *dce_i2c_sw;
  35
  36        if (!ddc) {
  37                BREAK_TO_DEBUGGER();
  38                return false;
  39        }
  40
  41        if (!cmd) {
  42                BREAK_TO_DEBUGGER();
  43                return false;
  44        }
  45
  46        /* The software engine is only available on dce8 */
  47        dce_i2c_sw = dce_i2c_acquire_i2c_sw_engine(pool, ddc);
  48
  49        if (!dce_i2c_sw) {
  50                dce_i2c_hw = acquire_i2c_hw_engine(pool, ddc);
  51
  52                if (!dce_i2c_hw)
  53                        return false;
  54
  55                return dce_i2c_submit_command_hw(pool, ddc, cmd, dce_i2c_hw);
  56        }
  57
  58        return dce_i2c_submit_command_sw(pool, ddc, cmd, dce_i2c_sw);
  59
  60}
  61