scsi: ufs: mediatek: Implement get_hba_nortt callback for RTT capability

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Implement the get_hba_nortt callback to handle platform-specific RTT
capability differences:

 - For legacy platforms and IP versions before MT6995 B0, the RTT
   capability from host controller register is problematic, so limit it to
   2 (MTK_MAX_NUM_RTT_LEGACY).

 - For MT6995 B0 and later platforms, the issue is fixed and the value from
   host controller capability register can be used directly.

This replaces the previous max_num_rtt field in ufs_hba_variant_ops with
dynamic platform-specific logic.

Signed-off-by: Ed Tsai <ed.tsai@mediatek.com>
Reviewed-by: Peter Wang <peter.wang@mediatek.com>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Link: https://patch.msgid.link/20260615055802.105479-3-ed.tsai@mediatek.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

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Ed Tsai 2026-06-15 13:57:16 +08:00 • committed by Martin K. Petersen

parent e7896d02cb

commit 75f529a7bc

2 changed files with 13 additions and 3 deletions

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12

drivers/ufs/host/ufs-mediatek.c

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4

drivers/ufs/host/ufs-mediatek.h

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