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Commit 2884561a authored by Rajkumar Manoharan's avatar Rajkumar Manoharan Committed by John W. Linville
Browse files

ath9k: stomp audio profiles on weak signal strength 



On lower WLAN signal strength, WLAN downlink traffic might suffer
from retransmissions. At the mean time, playing SCO/A2DP profiles
is affecting WLAN stability. In such scenario, by stomping SCO/A2DP
BT traffic completely for a BTCOEX period, gives WLAN traffic an
oppertunity to recover PHY rate. It also improves WLAN stability at
lower RSSI without sacificing BT traffic.

Signed-off-by: default avatarRajkumar Manoharan <rmanohar@qca.qualcomm.com>
Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
parent b88083bf

drivers/net/wireless/ath/ath9k/ath9k.h

+1 −0
Original line number Diff line number Diff line
@@ -488,6 +488,7 @@ struct ath_btcoex { 
	int rssi_count;

	struct ath_gen_timer *no_stomp_timer; /* Timer for no BT stomping */

	struct ath_mci_profile mci;

	u8 stomp_audio;

};



#ifdef CONFIG_ATH9K_BTCOEX_SUPPORT

drivers/net/wireless/ath/ath9k/btcoex.c

+1 −0
Original line number Diff line number Diff line
@@ -49,6 +49,7 @@ static const u32 mci_wlan_weights[ATH_BTCOEX_STOMP_MAX] 
	{ 0x01017d01, 0x3b3b3b01, 0x3b3b3b01, 0x3b3b3b3b }, /* STOMP_LOW */

	{ 0x01017d01, 0x01010101, 0x01010101, 0x01010101 }, /* STOMP_NONE */

	{ 0x01017d01, 0x013b0101, 0x3b3b0101, 0x3b3b013b }, /* STOMP_LOW_FTP */

	{ 0xffffff01, 0xffffffff, 0xffffff01, 0xffffffff }, /* STOMP_AUDIO */

};



void ath9k_hw_init_btcoex_hw(struct ath_hw *ah, int qnum)

drivers/net/wireless/ath/ath9k/btcoex.h

+1 −0
Original line number Diff line number Diff line
@@ -50,6 +50,7 @@ enum ath_stomp_type { 
	ATH_BTCOEX_STOMP_LOW,

	ATH_BTCOEX_STOMP_NONE,

	ATH_BTCOEX_STOMP_LOW_FTP,

	ATH_BTCOEX_STOMP_AUDIO,

	ATH_BTCOEX_STOMP_MAX

};

drivers/net/wireless/ath/ath9k/gpio.c

+4 −1
Original line number Diff line number Diff line
@@ -247,6 +247,9 @@ static void ath_btcoex_period_timer(unsigned long data) 
			stomp_type = ATH_BTCOEX_STOMP_ALL;

			timer_period = btcoex->btscan_no_stomp;

		}

	} else if (btcoex->stomp_audio >= 5) {

		stomp_type = ATH_BTCOEX_STOMP_AUDIO;

		btcoex->stomp_audio = 0;

	}



	ath9k_hw_btcoex_bt_stomp(ah, stomp_type);

drivers/net/wireless/ath/ath9k/mci.c

+18 −0
Original line number Diff line number Diff line
@@ -729,12 +729,30 @@ void ath9k_mci_set_txpower(struct ath_softc *sc, bool setchannel, 
		ath9k_hw_set_txpowerlimit(ah, sc->config.txpowlimit, false);

}



static void ath9k_mci_stomp_audio(struct ath_softc *sc)

{

	struct ath_hw *ah = sc->sc_ah;

	struct ath_btcoex *btcoex = &sc->btcoex;

	struct ath_mci_profile *mci = &btcoex->mci;



	if (!mci->num_sco && !mci->num_a2dp)

		return;



	if (ah->stats.avgbrssi > 25) {

		btcoex->stomp_audio = 0;

		return;

	}



	btcoex->stomp_audio++;

}

void ath9k_mci_update_rssi(struct ath_softc *sc)

{

	struct ath_hw *ah = sc->sc_ah;

	struct ath_btcoex *btcoex = &sc->btcoex;

	struct ath9k_hw_mci *mci_hw = &sc->sc_ah->btcoex_hw.mci;



	ath9k_mci_stomp_audio(sc);



	if (!(mci_hw->config & ATH_MCI_CONFIG_CONCUR_TX))

		return;