after bisection:
6d7a793aabf31d7ba2b16fc13a94ccf0b90e4be0 is the first bad commit
commit 6d7a793aabf31d7ba2b16fc13a94ccf0b90e4be0
Author: José Roberto de Souza <[email protected]>
Date: Fri May 14 16:22:45 2021 -0700
drm/i915/display: Allow fastsets when DP_SDP_VSC infoframe do not match
with PSR enabled
When PSR is enabled it handles DP_SDP_VSC, changing revision and all
the other fields as necessary.
It can also enabled and disable this SDP as needed without a full
modeset.
So here masking DP_SDP_VSC bit when previous and future state PSR
enabled, it will still be checked when comparing the asked state
to what was programmed to hardware.
Cc: Gwan-gyeong Mun <[email protected]>
Cc: Radhakrishna Sripada <[email protected]>
Reported-by: Ville Syrjälä <[email protected]>
Fixes: 78b772e1a01f ("drm/i915/display: Fill PSR state during hardware
configuration read out")
Signed-off-by: José Roberto de Souza <[email protected]>
Reviewed-by: Gwan-gyeong Mun <[email protected]>
Link:
https://patchwork.freedesktop.org/patch/msgid/[email protected]
drivers/gpu/drm/i915/display/intel_display.c | 17 ++++++++++++++++-
1 file changed, 16 insertions(+), 1 deletion(-)
** Attachment added: "bisect log"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1958620/+attachment/5573585/+files/bisect
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https://bugs.launchpad.net/bugs/1958620
Title:
[Dell XPS 15 9575] Flickering white/black screen once KMS comes up
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