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| author | Thibaut VARÈNE <hacks@slashdirt.org> | 2022-04-17 17:03:52 +0200 |
|---|---|---|
| committer | Petr Štetiar <ynezz@true.cz> | 2022-04-18 06:43:06 +0200 |
| commit | b78db9daa4ad6ac58aa488b9e9f047e94632289a (patch) | |
| tree | be88c103a3567ca4d352b90d8238f72f2c08874d | |
| parent | a2c0de3b9581cda618dcca99d3c2fc2d2dc88210 (diff) | |
| download | upstream-b78db9daa4ad6ac58aa488b9e9f047e94632289a.tar.gz upstream-b78db9daa4ad6ac58aa488b9e9f047e94632289a.tar.bz2 upstream-b78db9daa4ad6ac58aa488b9e9f047e94632289a.zip | |
mac80211: fix QCA9561 PA bias
This patch fixes an invalid TX PA DC bias level on QCA9561, which
results in a very low output power and very low throughput as devices
are further away from the AP (compared to other 2.4GHz APs),
following a suggestion from nbd[1].
This patch has been submitted upstream[2].
[1] https://lore.kernel.org/all/91c58969-c60e-2f41-00ac-737786d435ae@nbd.name
[2] https://lore.kernel.org/linux-wireless/20220417145145.1847-1-hacks+kernel@slashdirt.org/
Signed-off-by: Thibaut VARÈNE <hacks@slashdirt.org>
(cherry picked from commit 7dc52a78ae2c2f748a0c0c4adcb13979260b3498)
| -rw-r--r-- | package/kernel/mac80211/patches/ath9k/580-ath9k_ar9561_fix_bias_level.patch | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/package/kernel/mac80211/patches/ath9k/580-ath9k_ar9561_fix_bias_level.patch b/package/kernel/mac80211/patches/ath9k/580-ath9k_ar9561_fix_bias_level.patch new file mode 100644 index 0000000000..e4c2e1cd02 --- /dev/null +++ b/package/kernel/mac80211/patches/ath9k/580-ath9k_ar9561_fix_bias_level.patch @@ -0,0 +1,47 @@ +From 4509e523dba46f789377cfec6f20579adf743416 Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Thibaut=20VAR=C3=88NE?= <hacks+kernel@slashdirt.org> +Date: Sun, 17 Apr 2022 11:31:35 +0200 +Subject: [PATCH v2] ath9k: fix QCA9561 PA bias level +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +This patch fixes an invalid TX PA DC bias level on QCA9561, which +results in a very low output power and very low throughput as devices +are further away from the AP (compared to other 2.4GHz APs). + +This patch was suggested by Felix Fietkau, who noted[1]: +"The value written to that register is wrong, because while the mask +definition AR_CH0_TOP2_XPABIASLVL uses a different value for 9561, the +shift definition AR_CH0_TOP2_XPABIASLVL_S is hardcoded to 12, which is +wrong for 9561." + +In real life testing, without this patch the 2.4GHz throughput on +Yuncore XD3200 is around 10Mbps sitting next to the AP, and closer to +practical maximum with the patch applied. + +[1] https://lore.kernel.org/all/91c58969-c60e-2f41-00ac-737786d435ae@nbd.name + +Signed-off-by: Thibaut VARÈNE <hacks+kernel@slashdirt.org> +--- +v2: Adjust #define per Felix's suggestion +--- + drivers/net/wireless/ath/ath9k/ar9003_phy.h | 2 +- + 1 file changed, 1 insertion(+), 1 deletion(-) + +diff --git a/drivers/net/wireless/ath/ath9k/ar9003_phy.h b/drivers/net/wireless/ath/ath9k/ar9003_phy.h +index a171dbb29..ad949eb02 100644 +--- a/drivers/net/wireless/ath/ath9k/ar9003_phy.h ++++ b/drivers/net/wireless/ath/ath9k/ar9003_phy.h +@@ -720,7 +720,7 @@ + #define AR_CH0_TOP2 (AR_SREV_9300(ah) ? 0x1628c : \ + (AR_SREV_9462(ah) ? 0x16290 : 0x16284)) + #define AR_CH0_TOP2_XPABIASLVL (AR_SREV_9561(ah) ? 0x1e00 : 0xf000) +-#define AR_CH0_TOP2_XPABIASLVL_S 12 ++#define AR_CH0_TOP2_XPABIASLVL_S (AR_SREV_9561(ah) ? 9 : 12) + + #define AR_CH0_XTAL (AR_SREV_9300(ah) ? 0x16294 : \ + ((AR_SREV_9462(ah) || AR_SREV_9565(ah)) ? 0x16298 : \ +-- +2.30.2 + |