diff options
| author | Imre Deak <[email protected]> | 2024-07-08 22:00:25 +0300 |
|---|---|---|
| committer | Imre Deak <[email protected]> | 2024-07-11 21:11:59 +0300 |
| commit | 211ad49cf8ccfdc798a719b4d1e000d0a8a9e588 (patch) | |
| tree | 12173f9bffc17ebb301de2de4b12e68ea55c76a7 /tools/perf/scripts/python/arm-cs-trace-disasm.py | |
| parent | a4d5ce61765c08ab364aa4b327f6739b646e6cfa (diff) | |
drm/i915/dp: Don't switch the LTTPR mode on an active link
Switching to transparent mode leads to a loss of link synchronization,
so prevent doing this on an active link. This happened at least on an
Intel N100 system / DELL UD22 dock, the LTTPR residing either on the
host or the dock. To fix the issue, keep the current mode on an active
link, adjusting the LTTPR count accordingly (resetting it to 0 in
transparent mode).
v2: Adjust code comment during link training about reiniting the LTTPRs.
(Ville)
Fixes: 7b2a4ab8b0ef ("drm/i915: Switch to LTTPR transparent mode link training")
Reported-and-tested-by: Gareth Yu <[email protected]>
Closes: https://gitlab.freedesktop.org/drm/i915/kernel/-/issues/10902
Cc: <[email protected]> # v5.15+
Cc: Ville Syrjälä <[email protected]>
Reviewed-by: Ville Syrjälä <[email protected]>
Reviewed-by: Ankit Nautiyal <[email protected]>
Signed-off-by: Imre Deak <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
Diffstat (limited to 'tools/perf/scripts/python/arm-cs-trace-disasm.py')
0 files changed, 0 insertions, 0 deletions