how can you have verified this for oem-5.17, as it hasn't been uploaded
yet? :)

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https://bugs.launchpad.net/bugs/1978986

Title:
  [SRU][J/OEM-5.17][PATCH 0/1] Fix oled brightness set above frame-
  average luminance

Status in HWE Next:
  Fix Released
Status in linux package in Ubuntu:
  In Progress
Status in linux-oem-5.14 package in Ubuntu:
  Invalid
Status in linux-oem-5.17 package in Ubuntu:
  Invalid
Status in linux-oem-6.0 package in Ubuntu:
  Invalid
Status in linux-oem-5.14 source package in Focal:
  Fix Released
Status in linux source package in Jammy:
  Fix Released
Status in linux-oem-5.14 source package in Jammy:
  Invalid
Status in linux-oem-5.17 source package in Jammy:
  Fix Committed
Status in linux-oem-6.0 source package in Jammy:
  Fix Released
Status in linux source package in Kinetic:
  Fix Committed
Status in linux-oem-5.14 source package in Kinetic:
  Invalid
Status in linux-oem-5.17 source package in Kinetic:
  Invalid
Status in linux-oem-6.0 source package in Kinetic:
  Invalid

Bug description:
  [Impact]
  The brightness is not changed obviously during 200 to 255 on AMD
  or 400 to 512 on Intel..

  [Fix]
  Read HDR meta to detect the max and min luminance.
  max_cll defines the content light luminance for individual pixel.
  max_fall defines frame-average level luminance.
  Use max_fall value instead of max_cll as a limit for brightness control.

  [Test]
  Verified on AMD Cezanne, Barcelo, Rembrandt and Intel ADL, also on LCD panel 
and OLED panel. The brightness is changed more obivously on OLED panel, and
  no affect on LCD panel.

  [Where problems could occur]
  Low risk, It may cause the max brightness can't be set.

  All 3 patches are in drm-misc tree.

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