[PATCH 0/2] wifi: mt76: fix per-band LEDs under single-wiphy MLO

[Petr Wozniak <petr.wozniak@gmail.com>]

On MT7996 (and other single-wiphy MLO mt76 devices) only the 2.4 GHz LED
was ever usable: the 5/6 GHz band LEDs stayed dark and a WARN_ON() was hit
during probe.

Two issues are involved:

1. mt76_led_init() calls ieee80211_create_tpt_led_trigger() for every band,
   but that helper supports only one trigger per ieee80211_hw and
   WARN_ON()s + returns NULL on the second call, so the secondary bands got
   a NULL default trigger.

2. mt7996 assigned the LED brightness_set/blink_set callbacks only to the
   primary PHY, so mt76_led_init() bailed out early for the 5/6 GHz bands
   and never registered their LED classdevs.

Patch 1 shares the throughput trigger across all bands; patch 2 registers a
LED classdev for every band. With both applied, all three band LEDs
(mt76-phy0/1/2) come up and blink on their band's traffic.

Tested on a BPI-R4 (MT7996/BE14): all three per-band LEDs register at boot
with no WARN_ON(), and each blinks on its own band's activity (verified
with single-band and MLO clients).

Petr Wozniak (2):
  wifi: mt76: share the throughput LED trigger across bands
  wifi: mt76: mt7996: register a LED classdev for every band

 drivers/net/wireless/mediatek/mt76/mac80211.c  | 18 +++++++++++++-----
 .../net/wireless/mediatek/mt76/mt7996/init.c   | 18 ++++++++++++------
 2 files changed, 25 insertions(+), 11 deletions(-)

-- 
2.51.0