src/lib/dp_aux.c

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 #include <dp_aux.h>
   4
   5 bool dp_aux_request_is_write(enum aux_request request)
   6 {
   7         switch (request) {
   8         case I2C_RAW_WRITE_AND_STOP:
   9         case I2C_RAW_WRITE:
  10         case DPCD_WRITE:
  11                 return true;
  12         default:
  13                 return false;
  14         }
  15 }
  16
  17 enum i2c_over_aux dp_get_aux_cmd(enum aux_request request, uint32_t remaining_after_this)
  18 {
  19         switch (request) {
  20         case I2C_RAW_WRITE_AND_STOP:
  21                 if (!remaining_after_this)
  22                         return I2C_OVER_AUX_WRITE_MOT_0;
  23                 __fallthrough;
  24         case I2C_RAW_WRITE:
  25                 return I2C_OVER_AUX_WRITE_MOT_1;
  26         case I2C_RAW_READ_AND_STOP:
  27                 if (!remaining_after_this)
  28                         return I2C_OVER_AUX_READ_MOT_0;
  29                 __fallthrough;
  30         case I2C_RAW_READ:
  31                 return I2C_OVER_AUX_READ_MOT_1;
  32         case DPCD_WRITE:
  33                 return NATIVE_AUX_WRITE;
  34         case DPCD_READ:
  35         default:
  36                 return NATIVE_AUX_READ;
  37         }
  38 }