linux-kernel - [PATCH v1] Bluetooth: hci_qca: Request Tx clock vote off only when Tx is pending

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Message-Id: <1591964117-8228-1-git-send-email-bgodavar@codeaurora.org>
Date:   Fri, 12 Jun 2020 17:45:17 +0530
From:   Balakrishna Godavarthi <bgodavar@...eaurora.org>
To:     marcel@...tmann.org, johan.hedberg@...il.com
Cc:     mka@...omium.org, linux-kernel@...r.kernel.org,
        linux-bluetooth@...r.kernel.org, hemantg@...eaurora.org,
        linux-arm-msm@...r.kernel.org, abhishekpandit@...omium.org,
        rjliao@...eaurora.org, gubbaven@...eaurora.org,
        Balakrishna Godavarthi <bgodavar@...eaurora.org>
Subject: [PATCH v1] Bluetooth: hci_qca: Request Tx clock vote off only when Tx is pending

Tx pending flag is set to true when HOST IBS state is AWAKE or
AWAKEING. If IBS state is ASLEEP, then Tx clock is already voted
off. To optimize further directly calling serial_clock_vote()
instead of qca_wq_serial_tx_clock_vote_off(), at this point of
qca_suspend() already data is sent out. No need to wake up hci to
send data.

Signed-off-by: Balakrishna Godavarthi <bgodavar@...eaurora.org>
---
 drivers/bluetooth/hci_qca.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/bluetooth/hci_qca.c b/drivers/bluetooth/hci_qca.c
index f3fde99..50f896f 100644
--- a/drivers/bluetooth/hci_qca.c
+++ b/drivers/bluetooth/hci_qca.c
@@ -2107,6 +2107,7 @@ static int __maybe_unused qca_suspend(struct device *dev)
 	if (tx_pending) {
 		serdev_device_wait_until_sent(hu->serdev,
 					      msecs_to_jiffies(CMD_TRANS_TIMEOUT_MS));
+		serial_clock_vote(HCI_IBS_TX_VOTE_CLOCK_OFF, hu);
 	}
 
 	/* Wait for HCI_IBS_SLEEP_IND sent by device to indicate its Tx is going
@@ -2120,7 +2121,6 @@ static int __maybe_unused qca_suspend(struct device *dev)
 		goto error;
 	}
 
-	qca_wq_serial_tx_clock_vote_off(&qca->ws_tx_vote_off);
 	return 0;
 
 error:
-- 
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