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ath9k: stomp audio profiles on weak signal strength

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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: Rajkumar Manoharan <rmanohar@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Rajkumar Manoharan
2012-11-20 18:30:01 +05:30
committed by John W. Linville
parent b88083bfb3
commit 2884561a64
5 changed files with 25 additions and 1 deletions
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18
drivers/net/wireless/ath/ath9k/mci.c
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@@ -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;