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Felix Fietkau
0b09c6cbf9
Single-adie mt7986 binds its only phy to band 1. The eeprom parse
stores that phy's chainmask unshifted (chainshift is still 0 at that
point) but then sets chainshift to the mask width, so every consumer
that shifts by band_idx * chainshift disagrees with the storage:
mt7915_mcu_set_chan_info() sends rx_path 0 to the firmware with the
default mask, and mt7915_set_antenna() stores a band-shifted mask
inconsistent with the parse-time default.
Derive chainshift only from a band-0 main phy. In the single-phy
band-1 configuration the chains are numbered from 0 like a band-0 phy,
so with chainshift kept at 0 the stored mask, the set_antenna path, the
channel switch command and the RX chain report all agree on unshifted
masks. Drop the now-redundant empty-mask fallback in the RX path.
Dual-phy DBDC configurations parse the band-0 phy first and are
unaffected.
Fixes: 006b9d4ad5bf ("mt76: mt7915: introduce band_idx in mt7915_phy")
Signed-off-by: Felix Fietkau <[email protected]>