[PATCH][SRU][OEM-5.14] Fix s0i3 entry errors for AMD platforms

Alex Hung alex.hung at canonical.com
Fri Sep 24 01:00:16 UTC 2021


  BugLink: https://bugs.launchpad.net/bugs/1943633

[Impact]

  amd-pmc times out communicating with the SMU over stress testing cycles like:
   > amd_pmc AMDI0005:00: SMU response timed out
   > amd_pmc AMDI0005:00: failed to talk to SMU
   > amd_pmc AMDI0005:00: suspend failed
   > PM: dpm_run_callback(): acpi_subsys_suspend_noirq+0x0/0x50 returns -110

[Fix]

  Increase the timeout to 2000ms that matches to GPU driver.

[Test]

  This is requested by AMD.

[Where problems could occur]

  Low risk. This only affects small number of AMD systems that would excess the
  original timeout with low fail rate 0.9%-1.7%. In worst case scenario it would
  only takes time up to 2 seconds.

Mario Limonciello (1):
  platform/x86: amd-pmc: Increase the response register timeout

 drivers/platform/x86/amd-pmc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

-- 
2.7.4




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