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wifi: rtl8xxxu: Fix HT40 channel config for RTL8192CU, RTL8723AU

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Flip the response rate subchannel. It was backwards, causing low
speeds when using 40 MHz channel width. "iw dev ... station dump"
showed a low RX rate, 11M or less.

Also fix the channel width field of RF6052_REG_MODE_AG.

Tested only with RTL8192CU, but these settings are identical for
RTL8723AU.

Signed-off-by: Bitterblue Smith <rtl8821cerfe2@gmail.com>
Reviewed-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Link: https://patch.msgid.link/1f46571d-855b-43e1-8bfc-abacceb96043@gmail.com
This commit is contained in:
Bitterblue Smith 2025-11-20 16:10:01 +02:00 committed by Ping-Ke Shih
parent 2a2aae3655
commit 5511ba3de4
1 changed files with 3 additions and 4 deletions
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7
drivers/net/wireless/realtek/rtl8xxxu/core.c
View File

@ -1252,7 +1252,7 @@ void rtl8xxxu_gen1_config_channel(struct ieee80211_hw *hw)
opmode &= ~BW_OPMODE_20MHZ;
rtl8xxxu_write8(priv, REG_BW_OPMODE, opmode);
rsr &= ~RSR_RSC_BANDWIDTH_40M;
if (sec_ch_above)
if (!sec_ch_above)
rsr |= RSR_RSC_UPPER_SUB_CHANNEL;
else
rsr |= RSR_RSC_LOWER_SUB_CHANNEL;
@ -1321,9 +1321,8 @@ void rtl8xxxu_gen1_config_channel(struct ieee80211_hw *hw)
for (i = RF_A; i < priv->rf_paths; i++) {
val32 = rtl8xxxu_read_rfreg(priv, i, RF6052_REG_MODE_AG);
if (hw->conf.chandef.width == NL80211_CHAN_WIDTH_40)
val32 &= ~MODE_AG_CHANNEL_20MHZ;
else
val32 &= ~MODE_AG_BW_MASK;
if (hw->conf.chandef.width != NL80211_CHAN_WIDTH_40)
val32 |= MODE_AG_CHANNEL_20MHZ;
rtl8xxxu_write_rfreg(priv, i, RF6052_REG_MODE_AG, val32);
}