netdev - [PATCH] wcn36xx: Set BTLE coexistence related configuration values to defaults

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Date:   Sun, 12 Nov 2017 16:21:46 +0200
From:   Ramon Fried <rfried@...eaurora.org>
To:     kvalo@...eaurora.org
Cc:     k.eugene.e@...il.com, wcn36xx@...ts.infradead.org,
        linux-wireless@...r.kernel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, bjorn.andersson@...aro.org,
        nicolas.dechesne@...aro.org, Eyal Ilsar <eilsar@...eaurora.org>,
        Ramon Fried <rfried@...eaurora.org>
Subject: [PATCH] wcn36xx: Set BTLE coexistence related configuration values to defaults

From: Eyal Ilsar <eilsar@...eaurora.org>

If the value for the firmware configuration parameters BTC_STATIC_LEN_LE_BT
and BTC_STATIC_LEN_LE_WLAN are not set the duty cycle between BT and WLAN
is such that if BT (including BLE) is active WLAN gets 0 bandwidth.
When tuning these parameters having a too high value for WLAN means that BLE performance degrades.
The "sweet" point of roughly half of the maximal values was empirically found to achieve
a balance between BLE and Wi-Fi coexistence performance.

Signed-off-by: Eyal Ilsar <eilsar@...eaurora.org>
Signed-off-by: Ramon Fried <rfried@...eaurora.org>
---
 drivers/net/wireless/ath/wcn36xx/smd.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/net/wireless/ath/wcn36xx/smd.c b/drivers/net/wireless/ath/wcn36xx/smd.c
index 9c6590d..1c75987 100644
--- a/drivers/net/wireless/ath/wcn36xx/smd.c
+++ b/drivers/net/wireless/ath/wcn36xx/smd.c
@@ -72,8 +72,10 @@ struct wcn36xx_cfg_val {
 	WCN36XX_CFG_VAL(DYNAMIC_PS_POLL_VALUE, 0),
 	WCN36XX_CFG_VAL(TX_PWR_CTRL_ENABLE, 1),
 	WCN36XX_CFG_VAL(ENABLE_CLOSE_LOOP, 1),
-	WCN36XX_CFG_VAL(ENABLE_LPWR_IMG_TRANSITION, 0),
+	WCN36XX_CFG_VAL(BTC_STATIC_LEN_LE_BT, 120000),
+	WCN36XX_CFG_VAL(BTC_STATIC_LEN_LE_WLAN, 30000),
 	WCN36XX_CFG_VAL(MAX_ASSOC_LIMIT, 10),
+	WCN36XX_CFG_VAL(ENABLE_LPWR_IMG_TRANSITION, 0),
 	WCN36XX_CFG_VAL(ENABLE_MCC_ADAPTIVE_SCHEDULER, 0),
 };
 
-- 
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