From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.8 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4CC3FC04EB8 for ; Fri, 30 Nov 2018 15:03:31 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 1247020834 for ; Fri, 30 Nov 2018 15:03:31 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="key not found in DNS" (0-bit key) header.d=codeaurora.org header.i=@codeaurora.org header.b="b2sqsLsi"; dkim=fail reason="key not found in DNS" (0-bit key) header.d=codeaurora.org header.i=@codeaurora.org header.b="KHoWpG/6" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 1247020834 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-bluetooth-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727310AbeLACNB (ORCPT ); Fri, 30 Nov 2018 21:13:01 -0500 Received: from smtp.codeaurora.org ([198.145.29.96]:58172 "EHLO smtp.codeaurora.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726843AbeLACNA (ORCPT ); Fri, 30 Nov 2018 21:13:00 -0500 Received: by smtp.codeaurora.org (Postfix, from userid 1000) id D20FF60913; Fri, 30 Nov 2018 15:03:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1543590204; bh=XnZaeQcx41V0uGtWNEsuJlg6Xt9prKh8PFBDs3ByIoc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=b2sqsLsiefV7n0nJ0VUT7UURuAbcZpoUhMaIxX+g87njeJ1mlUhrnk/1OkNckMipC 4Allgdhrmx+OhMUhfWssBiXbiaNeQRPfh+A7ucmvjobhtJzv/KeDHLBtHEUKi6I6Sb iO+YKojn+QBjNhOXiYSABEDbfZgupTEMz2Xz4nBo= 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 6177F60C64; Fri, 30 Nov 2018 15:03:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1543590203; bh=XnZaeQcx41V0uGtWNEsuJlg6Xt9prKh8PFBDs3ByIoc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=KHoWpG/6GrJKDH9J7z70cL8oq5uU1FQe1BQqESgsv1rS+R7MqiGIoV9mDRs42tb+/ 3gIyGbzM3pgDfJENW6RR2/2gSDvxRzKB3qPCymvp6qcZVB7nYQv66FpdzC3Ss1kcHD CiQ0jGEoq1JZDLPEPOYGZCHlfDeOBPxh3MHT3hqA= DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 6177F60C64 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 v3 4/4] Bluetooth: hci_qca: Disable IBS state machine and flush Tx buffer Date: Fri, 30 Nov 2018 20:32:47 +0530 Message-Id: <20181130150247.26294-5-bgodavar@codeaurora.org> X-Mailer: git-send-email 2.19.1 In-Reply-To: <20181130150247.26294-1-bgodavar@codeaurora.org> References: <20181130150247.26294-1-bgodavar@codeaurora.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-bluetooth-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-bluetooth@vger.kernel.org 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 --- v3: * initial patch --- drivers/bluetooth/hci_qca.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/bluetooth/hci_qca.c b/drivers/bluetooth/hci_qca.c index d595a82cb4b9..6f2a4bf7ba17 100644 --- a/drivers/bluetooth/hci_qca.c +++ b/drivers/bluetooth/hci_qca.c @@ -1286,6 +1286,8 @@ static void qca_power_shutdown(struct hci_uart *hu) * still open, discard all the garbage data received on the Rx line. */ set_bit(STATE_DISCARD_RX, &qca->flags); + 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); -- The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project