From patchwork Wed Jan 16 11:46:03 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Balakrishna Godavarthi X-Patchwork-Id: 10765811 X-Patchwork-Delegate: agross@codeaurora.org Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id B77BD139A for ; Wed, 16 Jan 2019 11:46:53 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id A79732DD98 for ; Wed, 16 Jan 2019 11:46:53 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id A54122DDBB; Wed, 16 Jan 2019 11:46:53 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.7 required=2.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id A01E72DDB7 for ; Wed, 16 Jan 2019 11:46:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2392515AbfAPLqm (ORCPT ); Wed, 16 Jan 2019 06:46:42 -0500 Received: from smtp.codeaurora.org ([198.145.29.96]:43548 "EHLO smtp.codeaurora.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2389613AbfAPLqc (ORCPT ); Wed, 16 Jan 2019 06:46:32 -0500 Received: by smtp.codeaurora.org (Postfix, from userid 1000) id 94A39608FB; Wed, 16 Jan 2019 11:46:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1547639191; bh=ymB409/EObpTpVe+aPgVCCFfMgzXP9PAx6hVzoDTkiQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=XFffsftcqXFYAHVpWi3jut3vDDiYSTCuKn9BeQcHL7S0IzWz2eOMLsGNA4JZm44n7 TnisocOyk8/q6vVwzKw1Cd5jPhPHBE6Gb7HaYz5WwfNH34Wd8lq9UnpxOCw8YszUA6 lFZrgzUPHp0JWuVtFL2t9DKBChzyJW2Wdagz8lJQ= Received: from bgodavar-linux.qualcomm.com (blr-c-bdr-fw-01_globalnat_allzones-outside.qualcomm.com [103.229.19.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: bgodavar@smtp.codeaurora.org) by smtp.codeaurora.org (Postfix) with ESMTPSA id 46D2F6087D; Wed, 16 Jan 2019 11:46:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1547639191; bh=ymB409/EObpTpVe+aPgVCCFfMgzXP9PAx6hVzoDTkiQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=XFffsftcqXFYAHVpWi3jut3vDDiYSTCuKn9BeQcHL7S0IzWz2eOMLsGNA4JZm44n7 TnisocOyk8/q6vVwzKw1Cd5jPhPHBE6Gb7HaYz5WwfNH34Wd8lq9UnpxOCw8YszUA6 lFZrgzUPHp0JWuVtFL2t9DKBChzyJW2Wdagz8lJQ= DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 46D2F6087D Authentication-Results: pdx-caf-mail.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: pdx-caf-mail.web.codeaurora.org; spf=none smtp.mailfrom=bgodavar@codeaurora.org From: Balakrishna Godavarthi To: marcel@holtmann.org, johan.hedberg@gmail.com Cc: mka@chromium.org, linux-kernel@vger.kernel.org, linux-bluetooth@vger.kernel.org, hemantg@codeaurora.org, linux-arm-msm@vger.kernel.org, Balakrishna Godavarthi Subject: [PATCH v8 3/3] Bluetooth: hci_qca: Disable IBS state machine and flush Tx buffer Date: Wed, 16 Jan 2019 17:16:03 +0530 Message-Id: <20190116114603.500-4-bgodavar@codeaurora.org> X-Mailer: git-send-email 2.19.1 In-Reply-To: <20190116114603.500-1-bgodavar@codeaurora.org> References: <20190116114603.500-1-bgodavar@codeaurora.org> MIME-Version: 1.0 Sender: linux-arm-msm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP During hci down we observed IBS sleep commands are queued in the Tx buffer and hci_uart_write_work is sending data to the chip which is not required as the chip is powered off. This patch will disable IBS and flush the Tx buffer before we turn off the chip. Signed-off-by: Balakrishna Godavarthi --- drivers/bluetooth/hci_qca.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/bluetooth/hci_qca.c b/drivers/bluetooth/hci_qca.c index 7e4afcf40da2..7330ba71ada4 100644 --- a/drivers/bluetooth/hci_qca.c +++ b/drivers/bluetooth/hci_qca.c @@ -1275,6 +1275,14 @@ static const struct qca_vreg_data qca_soc_data = { static void qca_power_shutdown(struct hci_uart *hu) { + struct qca_data *qca = hu->priv; + + /* From this point we go into power off state. But serial port is + * still open, stop queueing the IBS data and flush all the buffered + * data in skb's. + */ + clear_bit(STATE_IN_BAND_SLEEP_ENABLED, &qca->flags); + qca_flush(hu); host_set_baudrate(hu, 2400); qca_send_power_pulse(hu, QCA_WCN3990_POWEROFF_PULSE); qca_power_setup(hu, false);