mt7921 / mt7921e can't change tx power and channel

[doublep21]

i can't change tx power and it's pretty useless that way , the signal drop too fast . The channel is broken too on mt7921 . Please help me.

[Easton97-Jens]

Hi everyone,

I’m currently using OpenWrt 24.10-rc2 with a MediaTek MT7922 and the latest mt76 driver. I’ve encountered an issue with the TX power being limited to 3 dBm. This issue occurs with both the MediaTek MT7921e and the MT7922.

This problem has persisted since version 23.05, and I haven’t been able to find a solution so far. Additionally, I’ve downloaded the latest firmware directly from the repository:
https://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git/tree/mediatek?id=862cd7427f8899104c224084d07416cddff1ea1f

Here are the details of my setup:

System: x64 platform

Wi-Fi Chip: MediaTek MT7922

Driver: Latest version of mt76

Firmware: Latest version from the repository linked above

Country Code: correctly set

Despite this configuration, the TX power remains limited to 3 dBm, leading to very poor range and performance. I’ve tried several adjustments, but so far, there’s been no improvement.

Are there any known solutions or workarounds for this issue? I’m happy to assist with further testing and provide debug logs if needed.

Thank you for your support!

[romanovj]

maybe this greearb/linux-ct-6.13@8e84f02

--- a/drivers/net/wireless/mediatek/mt76/mt7921/init.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7921/init.c
@@ -74,6 +74,9 @@ mt7921_regd_channel_update(struct wiphy *wiphy, struct mt792x_dev *dev)
 	struct ieee80211_channel *ch;
 	int i, cfreq;
 
+	if (!(dev->phy.chip_cap & MT792x_CHIP_CAP_CLC_EVT_EN))
+		dev->phy.clc_chan_conf = 0xff;
+
 	np = mt76_find_power_limits_node(mdev);
 
 	sband = wiphy->bands[NL80211_BAND_5GHZ];

[doublep21]

maybe this greearb/linux-ct-6.13@8e84f02

--- a/drivers/net/wireless/mediatek/mt76/mt7921/init.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7921/init.c
@@ -74,6 +74,9 @@ mt7921_regd_channel_update(struct wiphy *wiphy, struct mt792x_dev *dev)
 	struct ieee80211_channel *ch;
 	int i, cfreq;
 
+	if (!(dev->phy.chip_cap & MT792x_CHIP_CAP_CLC_EVT_EN))
+		dev->phy.clc_chan_conf = 0xff;
+
 	np = mt76_find_power_limits_node(mdev);
 
 	sband = wiphy->bands[NL80211_BAND_5GHZ];

only for the channel or even for the tx power?