[ Dropping large CC list ] On 20/12/2018 15:43, Marc Gonzalez wrote: > I think I've checked every low-level thingamajig: > clocks, regulators, power domains, gdsc, voltage spec I found something else, by comparing the writes to the PHY and HC, downstream vs upstream: ufs_qcom_link_startup_post_change() calls ufs_qcom_phy_ctrl_rx_linecfg(phy, false); on my 8098 board (downstream, but not upstream) (Maybe this write is not required on sdm845...) Will test next week. Crossing my fingers that I've found the needle in the proverbial haystack :-) The comment is very promising: /* * Some UFS devices send incorrect LineCfg data as part of power mode * change sequence which may cause host PHY to go into bad state. * Disabling Rx LineCfg of host PHY should help avoid this. */ https://source.codeaurora.org/quic/la/kernel/msm-4.4/tree/drivers/scsi/ufs/ufs-qcom.c?h=LE.UM.1.3.r3.25#n658 Regards.
