UPSTREAM: drm/i915/dp_mst: Enable HBLANK expansion quirk for UHBR rates

Enabling the 5k@60Hz uncompressed mode on the MediaTek/Dell U3224KBA
monitor results in a blank screen, at least on MTL platforms on UHBR
link rates with some (<30) uncompressed bpp values. Enabling compression
fixes the problem, so do that for now. Windows enables DSC always if the
sink supports it and forcing it to enable the mode without compression
leads to the same problem above (which suggests a panel issue with
uncompressed mode).

The same 5k mode on non-UHBR link rates is not affected and lower
resolution modes are not affected either. The problem is similar to the
one fixed by the HBLANK expansion quirk on Synaptics hubs, with the
difference that the problematic mode has a longer HBLANK duration. Also
the monitor doesn't report supporting HBLANK expansion; either its
internal MST hub does the expansion internally - similarly to the
Synaptics hub - or the issue has another root cause, but still related
to the mode's short HBLANK duration. Enable the quirk for the monitor
adjusting the detection for the above differences.

v2: Rebase on drm_dp_128132b_supported() change.

Cc: dri-devel@lists.freedesktop.org
Reviewed-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
Tested-by: Khaled Almahallawy <khaled.almahallawy@intel.com>
Acked-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240417142217.457902-1-imre.deak@intel.com


(cherry picked from commit e78b8e8f)

BUG=b:332903004, b:322223603
TEST=Verify Dell U3224KB 6k mode on Rex using UHBR, MST encoder, Big
     Joiner, and DSC

Change-Id: Id3c9fb0295442a76a95603bec6ca7b44fe8c2387
Signed-off-by: Rakshith M O <rakshith.m.o@intel.com>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/kernel/+/5802892


Reviewed-by: Manasi Navare <navaremanasi@chromium.org>
Reviewed-by: Sean Paul <sean@poorly.run>
Signed-off-by: Hubert Mazur <hmazur@google.com>