On Wed, Aug 02, 2023 at 06:11:49AM -0500, Sanjay R Mehta wrote: > Previously, on unplug events, the TMU mode was disabled first > followed by the Time Synchronization Handshake, irrespective of > whether the tb_switch_tmu_rate_write() API was successful or not. > > However, this caused a problem with Thunderbolt 3 (TBT3) > devices, as the TSPacketInterval bits were always enabled by default, > leading the host router to assume that the device router's TMU was > already enabled and preventing it from initiating the Time > Synchronization Handshake. As a result, TBT3 monitors experienced > display flickering from the second hot plug onwards. > > To address this issue, we have modified the code to only disable the > Time Synchronization Handshake during TMU disable if the > tb_switch_tmu_rate_write() function is successful. This ensures that > the TBT3 devices function correctly and eliminates the display > flickering issue. > > Co-developed-by: Sanath S <Sanath.S@xxxxxxx> > Signed-off-by: Sanath S <Sanath.S@xxxxxxx> > Signed-off-by: Sanjay R Mehta <sanju.mehta@xxxxxxx> Marked for stable and applied to thunderbolt.git/fixes, thanks!
