scsi: ufs: ufs-pci: Add support for Intel UFS 4.0 HS-Gear5

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Reliable HS-Gear5 operation on Intel UFS 4.0 controllers requires
configuring PA_INITIAL_ADAPT before changing the power mode. Without
this setting, the link fails to train reliably at Gear5.

Add a pwr_change_notify() hook to configure the adaptation mode before
the power mode transition. Enable this only for UFS 4.0 and later
controllers by checking hba->ufs_version.

Wire the hook into the existing Meteor Lake family variant operations
table (ufs_intel_mtl_hba_vops) instead of introducing a separate table,
since the Intel UFS 4.0 PCI variant (PCI ID 8086:D335) already uses this
vops table and the hook is internally gated on UFS version >= 4.0.

Use PA_INITIAL_ADAPT when the negotiated TX power mode is FAST_MODE or
FASTAUTO_MODE. Otherwise, reset the adaptation mode to PA_NO_ADAPT,
which is the default setting.

Fixes: 096cd6b7ad ("scsi: ufs: ufs-pci: Add support for Intel Nova Lake")
Signed-off-by: sangram kumar yerra <sangram.k.y@intel.com>
Reviewed-by: Adrian Hunter <adrian.hunter@intel.com>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Link: https://patch.msgid.link/20260818112830.453402-2-sangram.k.y@intel.com
Signed-off-by: Martin K. Petersen (Oracle) <mkp@kernel.org>

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sangram kumar yerra 2026-08-18 16:58:29 +05:30 • committed by Martin K. Petersen (Oracle)

parent 11300f8dde

commit ef675ea168

1 changed files with 20 additions and 0 deletions

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drivers/ufs/host/ufshcd-pci.c

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