cvs commit: src/sys/dev/acpica acpi_ec.c

[Nate Lawson]

njl         2007-02-27 00:14:20 UTC

  FreeBSD src repository

  Modified files:
    sys/dev/acpica       acpi_ec.c 
  Log:
  Rework EC I/O approach.  Implement burst mode, including proper handling of
  case where it asynchronously exits burst mode on its own.  Handle different
  values of hz in sleep loop.  Provide more debugging options to tune EC
  behavior.  These tunables/sysctls may be temporary and are not for user
  access if the EC is working properly.  Burst mode is now on by default for
  testing and the poll interval has been increased from 100 to 500 us and
  total timeout from 100 to 500 ms.
  
  Hopefully this should be the first step of addressing reports of timeout
  errors during battery or thermal access, especially on HP/Compaq laptops.
  It is reasonably stable and should not cause a loss of functionality or
  performance on systems that were previously working.  Testing shows an
  increase of responsiveness by ~75% on one system.
  
  PR:             kern/98171
  
  Revision  Changes    Path
  1.69      +206 -109  src/sys/dev/acpica/acpi_ec.c