ACK: [PATCH 0/4][SRU][Jammy] Screen sometimes can't update on Intel Alder Lake GPUs

[Tim Gardner]

Acked-by: Tim Gardner <tim.gardner at canonical.com>

On 4/21/22 00:15, AceLan Kao wrote:
> From: "Chia-Lin Kao (AceLan)" <acelan.kao at canonical.com>
> 
> BugLink: https://bugs.launchpad.net/bugs/1967274
> 
> [Impact]
> The backlight power won't come back after the meta + l to turn off the
> display on ADL machines.
> 
> [Fix]
> Below series of commits from v5.17 fix this issue
> 1c7ab5affa5e drm/i915/xelpd: Add Pipe Color Lut caps to platform config
> 17815f624a90 drm/i915/xelpd: Enable Pipe Degamma
> e83c18cffaed drm/i915/xelpd: Enable Pipe color support for D13 platform
> 
> [Test]
> Verified on at least 2 different machines, the backlight is on after the
> screen dimmed with touchpad movement or key stroke.
> 
> [Where problems could occcur]
> The patches only affect ADL-P and up.
> 
> Uma Shankar (3):
>    drm/i915/xelpd: Enable Pipe color support for D13 platform
>    drm/i915/xelpd: Enable Pipe Degamma
>    drm/i915/xelpd: Add Pipe Color Lut caps to platform config
> 
> Ville Syrjälä (1):
>    drm/i915: Use unlocked register accesses for LUT loads
> 
>   drivers/gpu/drm/i915/display/intel_color.c | 151 ++++++++++++---------
>   drivers/gpu/drm/i915/display/intel_dsb.c   |   4 +-
>   drivers/gpu/drm/i915/i915_pci.c            |   5 +-
>   3 files changed, 90 insertions(+), 70 deletions(-)
> 

-- 
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Tim Gardner
Canonical, Inc