✓ CI.checkpatch: success for drm/i915: Fix DP MST DB message timeouts due to PPS delays

[Patchwork]

== Series Details ==

Series: drm/i915: Fix DP MST DB message timeouts due to PPS delays
URL   : https://patchwork.freedesktop.org/series/146681/
State : success

== Summary ==

+ KERNEL=/kernel
+ git clone https://gitlab.freedesktop.org/drm/maintainer-tools mt
Cloning into 'mt'...
warning: redirecting to https://gitlab.freedesktop.org/drm/maintainer-tools.git/
+ git -C mt rev-list -n1 origin/master
cbb4e4a079d89106c2736adc3c7de6f9dc56da07
+ cd /kernel
+ git config --global --add safe.directory /kernel
+ git log -n1
commit c7e0c3ba1883c4bb7fbb40cf1b461ef4b761daf8
Author: Imre Deak <imre.deak at intel.com>
Date:   Mon Mar 24 20:01:45 2025 +0200

    drm/i915/dp_mst: Fix side-band message timeouts due to long PPS delays
    
    The Panel Power Sequencer lock held on an eDP port (a) blocks a DP AUX
    transfer on another port (b), since the PPS lock is device global, thus
    shared by all ports. The PPS lock can be held on port (a) for a longer
    period due to the various PPS delays (panel/backlight on/off,
    power-cycle delays). This in turn can cause an MST down-message request
    on port (b) time out, if the above PPS delay defers the handling of the
    reply to the request by more than 100ms: the MST branch device sending
    the reply (signaling this via the DP_DOWN_REP_MSG_RDY flag in the
    DP_DEVICE_SERVICE_IRQ_VECTOR DPCD register) may cancel the reply
    (clearing DP_DOWN_REP_MSG_RDY and the reply message buffer) after 110
    ms, if the reply is not processed by that time.
    
    Avoid MST down-message timeouts described above, by locking the PPS
    state for AUX transfers only if this is actually required: on eDP ports,
    where the VDD power depends on the PPS state and on all DP and eDP ports
    on VLV/CHV, where the PPS is a pipe instance and hence a modeset on any
    port possibly affecting the PPS state.
    
    v2: Don't move PPS locking/VDD enabling to a separate function. (Jani)
    
    Cc: Jani Nikula <jani.nikula at intel.com>
    Signed-off-by: Imre Deak <imre.deak at intel.com>
+ /mt/dim checkpatch 9be2a7099019ef52d17cbc2b3e6ba15cd638ec2c drm-intel
0bdf935915dd drm/i915/pps: Let calling intel_pps_vdd_{on, off}_unlocked() w/o PPS lock held
c7e0c3ba1883 drm/i915/dp_mst: Fix side-band message timeouts due to long PPS delays