NACK: [PATCH 0/8][SRU][H] Fix garbage display when scrolling on TGL platforms

[Tim Gardner]

These are all from linux-next and should be noted in the '(backported 
from...)" line. Also, please describe what changes were required for the 
backport.

rtg

On 7/19/21 11:29 AM, chris.chiu at canonical.com wrote:
> From: Chris Chiu <chris.chiu at canonical.com>
> 
> BugLink: https://bugs.launchpad.net/bugs/1926579
> 
> [Impact]
> On Dell TGL platforms screen shows garbage when browsing website by scrolling mouse
> 
> [Fix]
> This patch fixes the issue
> https://patchwork.freedesktop.org/patch/430153/?series=89348&rev=1
> It needs dependant commits to be backported on top of Hirsute base. They define the stepping info and functions to access the stepping info so that the fix can specifically disable PSR2 when stepping is B1 from A0.
> 
> [Test]
> Verified on Dell TGL-H platforms.
> 
> [Where problems could occur]
> It disable PSR2 on A0 and B0 TGL-H platforms, should introduce no regression.
> 
> Aditya Swarup (1):
>    drm/i915/tgl: Use TGL stepping info for applying WAs
> 
> Caz Yokoyama (1):
>    drm/i915/adl_s: Add ADL-S platform info and PCI ids
> 
> Gwan-gyeong Mun (1):
>    drm/i915/display: Disable PSR2 if TGL Display stepping is B1 from A0
> 
> Jani Nikula (5):
>    drm/i915: split out stepping info to a new file
>    drm/i915: add new helpers for accessing stepping info
>    drm/i915: switch KBL to the new stepping scheme
>    drm/i915: switch TGL and ADL to the new stepping scheme
>    drm/i915: rename DISP_STEPPING->DISPLAY_STEP and GT_STEPPING->GT_STEP
> 
>   drivers/gpu/drm/i915/Makefile                 |   1 +
>   .../drm/i915/display/intel_display_power.c    |   7 +-
>   drivers/gpu/drm/i915/display/intel_psr.c      |  14 ++-
>   drivers/gpu/drm/i915/display/intel_sprite.c   |   2 +-
>   drivers/gpu/drm/i915/gt/intel_lrc.c           |   2 +-
>   drivers/gpu/drm/i915/gt/intel_workarounds.c   |  54 +++------
>   drivers/gpu/drm/i915/i915_drv.c               |   3 +-
>   drivers/gpu/drm/i915/i915_drv.h               |  97 ++++++----------
>   drivers/gpu/drm/i915/i915_pci.c               |  13 +++
>   drivers/gpu/drm/i915/intel_device_info.c      |   7 +-
>   drivers/gpu/drm/i915/intel_device_info.h      |   5 +
>   drivers/gpu/drm/i915/intel_pm.c               |  12 +-
>   drivers/gpu/drm/i915/intel_step.c             | 106 ++++++++++++++++++
>   drivers/gpu/drm/i915/intel_step.h             |  40 +++++++
>   include/drm/i915_pciids.h                     |  11 ++
>   15 files changed, 255 insertions(+), 119 deletions(-)
>   create mode 100644 drivers/gpu/drm/i915/intel_step.c
>   create mode 100644 drivers/gpu/drm/i915/intel_step.h
> 

-- 
-----------
Tim Gardner
Canonical, Inc