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wifi: mt76: mt792x: pick the SAR table layout from the table itself

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The SAR power tables are parsed with a version byte from a different
ACPI table, never their own.

Some firmware declares version 1 and ships version 2 tables. The
entries then start a byte early, and the 6 GHz limits the table
carries are dropped, because the older layout has no room for them.

  ASUS GA503RM, MTCL declares v1:
  MTGS  28 bytes   v1: (28-6) % 5 = 2, no fit   v2: 3 tables
  MTDS  19 bytes   v1: (19-6) % 6 = 1, no fit   v2: 1 table

The layouts accept disjoint lengths, so take whichever one fits and
keep it per table.

Reported-by: Sagun Kayastha <sgn.kayastha@gmail.com>
Closes: https://github.com/morrownr/mt76/issues/62
Fixes: f965333e49 ("mt76: mt7921: introduce ACPI SAR support")
Signed-off-by: Devin Wittmayer <lucid_duck@justthetip.ca>
Link: https://patch.msgid.link/20260905013551.24635-1-lucid_duck@justthetip.ca
Signed-off-by: Felix Fietkau <nbd@nbd.name>
This commit is contained in:
Devin Wittmayer 2026-09-04 18:35:51 -07:00 • committed by Felix Fietkau
commit af97bf5a7e
2 changed files with 73 additions and 39 deletions
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