[PATCH v4] wcn36xx: Set default BTLE coexistence config

From: Eyal Ilsar <redacted>

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 <redacted>
Signed-off-by: Ramon Fried <redacted>
---
 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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On Thu 16 Nov 00:01 PST 2017, Ramon Fried wrote:

From: Eyal Ilsar <redacted>

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 <redacted>
Signed-off-by: Ramon Fried <redacted>

Looks good,

Acked-by: Bjorn Andersson <redacted>

Regards,
Bjorn

Ramon Fried [off-list ref] wrote:

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 <redacted>
Signed-off-by: Ramon Fried <redacted>
Acked-by: Bjorn Andersson <redacted>
Signed-off-by: Kalle Valo <redacted>

Patch applied to ath-next branch of ath.git, thanks.

4119b6160a35 wcn36xx: set default BTLE coexistence config

-- 
https://patchwork.kernel.org/patch/10060833/

https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches