Am 23.02.23 um 19:26 schrieb 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...
Imho, since the proper fix lies within the Intel driver the quirk should also
lie within the Intel driver, because even if the panel has the same problem
combined with an AMD or NVIDIA card the proper fix for them will most likely be
land in the same kernel version. So there could be a period where you no longer
want the quirk for devices combining the panel with an Intel gpu but still with
an AMD GPU or vice versa.
Signed-off-by: Werner Sembach <wse@xxxxxxxxxxxxxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx>
