[PATCH 0/1][SRU][Bionic] Enable BIOS workaround for Nvidia HDMI audio

[Alex Hung]

BugLink: https://bugs.launchpad.net/bugs/1787058

[Impact]

  Some ThinkPad systems have a power-saving feature that turns off HDMI audio
  device in Windows, but NVidia Linux driver does not support this feature.
  As a result, HDMI audio will not work on Linux.

[Fix]

  BIOS added solutions with _OSI string "Linux-Lenovo-NV-HDMI-Audio" to
  workaround, and a patch to report _OSI("Linux-Lenovo-NV-HDMI-Audio")
  is required in Linux kernel.

  The patche is included in upstream and is cherry-picked from Linus's repo.

[Regression potential]

  No regression as all but targeted firmware will not use this _OSI string

Alex Hung (1):
  ACPI / OSI: Add OEM _OSI string to enable NVidia HDMI audio

 drivers/acpi/osi.c | 8 ++++++++
 1 file changed, 8 insertions(+)

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2.17.1