If I didn't get my good/bad confused on the reverse bisection, this appears to be the commit that fixes it:
5ac860cc52540df8bca27e0bb25b6744df67e8f0 is the first bad commit commit 5ac860cc52540df8bca27e0bb25b6744df67e8f0 Author: Ville Syrjälä <[email protected]> Date: Thu Mar 3 21:12:06 2022 +0200 drm/i915: Fix DBUF bandwidth vs. cdclk handling Make the dbuf bandwidth min cdclk calculations match the spec more closely. Supposedly the arbiter can only guarantee an equal share of the total bandwidth of the slice to each active plane on that slice. So we take the max bandwidth of any of the planes on each slice and multiply that by the number of active planes on the slice to get a worst case estimate on how much bandwidth we require. Signed-off-by: Ville Syrjälä <[email protected]> Link: https://patchwork.freedesktop.org/patch/msgid/[email protected] Reviewed-by: Stanislav Lisovskiy <[email protected]> drivers/gpu/drm/i915/display/intel_bw.c | 157 ++++++++++++++++++++--------- drivers/gpu/drm/i915/display/intel_bw.h | 10 +- drivers/gpu/drm/i915/display/intel_cdclk.c | 67 +++++------- drivers/gpu/drm/i915/display/intel_cdclk.h | 2 + 4 files changed, 147 insertions(+), 89 deletions(-) ** Attachment added: "bisect log 2" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1958620/+attachment/5574955/+files/bisect -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1958620 Title: [Dell XPS 15 9575] Flickering white/black screen once KMS comes up To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1958620/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
