wifi: mt76: mt7925: disable ASPM and runtime PM for MT7927

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Disable PCIe ASPM unconditionally for MT7927. The CONNINFRA power
domain and WFDMA register access are unreliable with PCIe L1 active,
causing throughput to drop from 1+ Gbps to ~200 Mbps.

Disable runtime PM and deep sleep for MT7927. The combo chip shares
a CONNINFRA power domain between WiFi (PCIe) and BT (USB).
SET_OWN/CLR_OWN transitions on the LPCTL register crash the BT
firmware, requiring a full power cycle to recover. PM enablement will
be addressed in a follow-up once safe power state transitions are
determined.

Reviewed-by: Sean Wang <sean.wang@mediatek.com>
Signed-off-by: Javier Tia <floss@jetm.me>
Link: https://patch.msgid.link/20260425195011.790265-10-sean.wang@kernel.org
Signed-off-by: Felix Fietkau <nbd@nbd.name>

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Javier Tia 2026-04-25 14:49:59 -05:00 • committed by Felix Fietkau

parent 4a91a8c30b

commit b0dddf55af

2 changed files with 6 additions and 3 deletions

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3

drivers/net/wireless/mediatek/mt76/mt7925/init.c

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6

drivers/net/wireless/mediatek/mt76/mt7925/pci.c

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