From patchwork Fri Dec 28 11:48:18 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Balakrishna Godavarthi X-Patchwork-Id: 10744431 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 F2FAA6C5 for ; Fri, 28 Dec 2018 11:49:05 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id D8182212E8 for ; Fri, 28 Dec 2018 11:49:05 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id CC9DF23F88; Fri, 28 Dec 2018 11:49:05 +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 78B7E212E8 for ; Fri, 28 Dec 2018 11:49:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732200AbeL1Lsj (ORCPT ); Fri, 28 Dec 2018 06:48:39 -0500 Received: from smtp.codeaurora.org ([198.145.29.96]:49412 "EHLO smtp.codeaurora.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1732193AbeL1Lsi (ORCPT ); Fri, 28 Dec 2018 06:48:38 -0500 Received: by smtp.codeaurora.org (Postfix, from userid 1000) id 95D236083C; Fri, 28 Dec 2018 11:48:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1545997717; bh=oVLi0wN37zbNGhhJgIq3WzbukBzHLUJk3h6FL2j+D0M=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=QYgnXLlDuGvNPwHHqpYWbfc3tBUF6Q1rmjDWBWuxxkiDHsT0knv2LZixOtcZafGfm ondGPmVpXdLj2Q2T9S0ZioSiGHwuRGhSDmZ5MNdYjW0bEOSPvx9cZp6qLPP5+ocseX xWcQ4qX7X3pWJ723Z7YvpSgmbJQrt7RhnT2H9RBc= 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 5D36A6087D; Fri, 28 Dec 2018 11:48:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1545997716; bh=oVLi0wN37zbNGhhJgIq3WzbukBzHLUJk3h6FL2j+D0M=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ZW//WANyS2Wj6EwqVnbg9s4S5ENNGLpQY3Ri/2j+aV+ti5BqqryVA7PH0hba4w+te J6pQ0MCIQwBBnBIf0c1HnRssdlKKAycqxeBG1RVDqEBV1OqboPmmD3Su09Y0mhc7v1 pFxY1fv8226SaAgouJNsL/qY815mEjLs/zf3dZTg= DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 5D36A6087D 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 v7 3/4] Bluetooth: hci_qca: Disable IBS state machine and flush Tx buffer Date: Fri, 28 Dec 2018 17:18:18 +0530 Message-Id: <20181228114819.17479-4-bgodavar@codeaurora.org> X-Mailer: git-send-email 2.19.1 In-Reply-To: <20181228114819.17479-1-bgodavar@codeaurora.org> References: <20181228114819.17479-1-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 b79ef901ab8b..9d5e41f159c7 100644 --- a/drivers/bluetooth/hci_qca.c +++ b/drivers/bluetooth/hci_qca.c @@ -1274,6 +1274,14 @@ 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);