netdev - [PATCH v4] wcn36xx: Set default BTLE coexistence config

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Date:   Thu, 16 Nov 2017 10:01:26 +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,
        bjorn.andersson@...aro.org, nicolas.dechesne@...aro.org,
        Eyal Ilsar <eilsar@...eaurora.org>,
        Ramon Fried <rfried@...eaurora.org>
Subject: [PATCH v4] wcn36xx: Set default BTLE coexistence config

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 | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/net/wireless/ath/wcn36xx/smd.c b/drivers/net/wireless/ath/wcn36xx/smd.c
index 9c6590d5348a..6f1e741acf3e 100644
--- a/drivers/net/wireless/ath/wcn36xx/smd.c
+++ b/drivers/net/wireless/ath/wcn36xx/smd.c
@@ -73,6 +73,8 @@ static struct wcn36xx_cfg_val wcn36xx_cfg_vals[] = {
 	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_MCC_ADAPTIVE_SCHEDULER, 0),
 };
-- 
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