[PATCH 0/2] Add quirk to disable PSR 2 on Tongfang PHxTxX1 and PHxTQx1

[Hogander, Jouni]

On Wed, 2023-02-22 at 15:17 +0100, Werner Sembach wrote:
> On these Barebones PSR 2 is recognized as supported but is very
> buggy:
> - Upper third of screen does sometimes not updated, resulting in
> disappearing cursors or ghosts of already closed Windows saying
> behind.
> - Approximately 40 px from the bottom edge a 3 pixel wide strip of
> randomly
> colored pixels is flickering.
> 
> PSR 1 is working fine however.
> 
> This patchset introduces a new quirk to disable PSR 2 specifically on
> known
> buggy devices and applies it to the Tongfang PHxTxX1 and PHxTQx1
> barebones.

I've been thinking something similar as there is still at least one
issue which seems to be like panel side issue:

https://gitlab.freedesktop.org/drm/intel/-/issues/7836

Did you considered dpcd_quirk_list in drivers/gpu/drm/drm_dp_helper.c?

I'm not sure which one is more correct though...

> 
> Signed-off-by: Werner Sembach <wse at tuxedocomputers.com>
> Cc: <stable at vger.kernel.org>
> 
>