mac80211: rt2x00: reduce tx power to nominal level on RT6352
authorDaniel Golle <daniel@makrotopia.org>
Thu, 7 Feb 2019 23:03:40 +0000 (00:03 +0100)
committerDaniel Golle <daniel@makrotopia.org>
Thu, 7 Feb 2019 23:08:58 +0000 (00:08 +0100)
Current implementation of RT6352 support provides too high tx power
at least on iPA/eLNA devices. Reduce amplification of variable gain
amplifier by 6dB to match board target power of 17dBm.
Transmited signal strength with this patch is similar to that of
stock firmware or pandorabox firmware. Throughput measured with iperf
improves. Device tested: Xiaomi Miwifi Mini.

Signed-off-by: Tomislav Požega <pozega.tomislav@gmail.com>
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
package/kernel/mac80211/patches/rt2x00/987-rt2x00-reduce-tx-power-to-nominal-level-on-RT6352.patch [new file with mode: 0644]

diff --git a/package/kernel/mac80211/patches/rt2x00/987-rt2x00-reduce-tx-power-to-nominal-level-on-RT6352.patch b/package/kernel/mac80211/patches/rt2x00/987-rt2x00-reduce-tx-power-to-nominal-level-on-RT6352.patch
new file mode 100644 (file)
index 0000000..f15fe7d
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+From: =?utf-8?q?Tomislav_Po=C5=BEega?= <pozega.tomislav@gmail.com>
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+Subject: [PATCH 1/2] rt2x00: reduce tx power to nominal level on RT6352
+Date: Thu, 27 Dec 2018 15:05:25 +0100
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+
+Current implementation of RT6352 support provides too high tx power
+at least on iPA/eLNA devices. Reduce amplification of variable gain
+amplifier by 6dB to match board target power of 17dBm.
+Transmited signal strength with this patch is similar to that of
+stock firmware or pandorabox firmware. Throughput measured with iperf
+improves. Device tested: Xiaomi Miwifi Mini.
+
+Signed-off-by: Tomislav Požega <pozega.tomislav@gmail.com>
+---
+ drivers/net/wireless/ralink/rt2x00/rt2800lib.c |    2 +-
+ 1 files changed, 1 insertions(+), 1 deletions(-)
+
+--- a/drivers/net/wireless/ralink/rt2x00/rt2800lib.c
++++ b/drivers/net/wireless/ralink/rt2x00/rt2800lib.c
+@@ -5814,7 +5814,7 @@ static int rt2800_init_registers(struct
+               rt2800_register_write(rt2x00dev, TX_SW_CFG2, 0x00000000);
+               rt2800_register_write(rt2x00dev, MIMO_PS_CFG, 0x00000002);
+               rt2800_register_write(rt2x00dev, TX_PIN_CFG, 0x00150F0F);
+-              rt2800_register_write(rt2x00dev, TX_ALC_VGA3, 0x06060606);
++              rt2800_register_write(rt2x00dev, TX_ALC_VGA3, 0x00000000);
+               rt2800_register_write(rt2x00dev, TX0_BB_GAIN_ATTEN, 0x0);
+               rt2800_register_write(rt2x00dev, TX1_BB_GAIN_ATTEN, 0x0);
+               rt2800_register_write(rt2x00dev, TX0_RF_GAIN_ATTEN, 0x6C6C666C);