[SRU][OEM-OSP1-B][PATCH 0/1] ICL hdmi audio doesn't work stable

Hui Wang hui.wang at canonical.com
Fri Jul 19 06:59:05 UTC 2019

BugLink: https://bugs.launchpad.net/bugs/1836916

This patch is needed to be merged to oem-osp1-b kernel ASAP, since
our oem project is waiting for this patch.

After we get the real fix, I will revert this patch.

On a Dell icelake platform, the hdmi audio doesn't work well, it has a
failure rate that the hdmi audio doesn't work.

set disable_power_well=0 for icl graphic card

[Test Case]
after applying the patchset, we plug hdmi cable and the hdmi audio shows up
in the sound-setting and works well, after unplugging the cable, the hdmi
audio disappears as expected. and repeat 20 times,  the hdmi audio always
work well

[Regression Risk]
Low. this patchset is specific to icl graphic card

Hui Wang (1):
  UBUNTU: SAUCE: i915: set disable_power_well=0 for icl temporarily

 drivers/gpu/drm/i915/intel_runtime_pm.c | 5 +++++
 1 file changed, 5 insertions(+)


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