From patchwork Tue Nov 6 12:05:25 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Balakrishna Godavarthi X-Patchwork-Id: 10670193 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 F3B1315E9 for ; Tue, 6 Nov 2018 12:06:08 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id E34F126255 for ; Tue, 6 Nov 2018 12:06:08 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id D76AF2927F; Tue, 6 Nov 2018 12:06:08 +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 7AD8126255 for ; Tue, 6 Nov 2018 12:06:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730760AbeKFVah (ORCPT ); Tue, 6 Nov 2018 16:30:37 -0500 Received: from smtp.codeaurora.org ([198.145.29.96]:51888 "EHLO smtp.codeaurora.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726976AbeKFVah (ORCPT ); Tue, 6 Nov 2018 16:30:37 -0500 Received: by smtp.codeaurora.org (Postfix, from userid 1000) id D7244605A2; Tue, 6 Nov 2018 12:05:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1541505942; bh=mLG9ZCaIJ8+4gofyelc0OXDiSRL2Xx/TlW0/WvtaCfI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=LDh/WAIc36pStvXStyp5aKItL1+qEe42g4o33cW5SYFlwbLhqcdIbLah3z+fD/bHA hLU+dXrnQKNRr8I6vskFfDiB1ePIEkhsVsh+aIvRXLlQgMWwCqycwURP+CZw9zeBrj L3szbsqh0oGjO8FD1/uBsOR7+I24bOZYrdAMP5J4= 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 A9F6960591; Tue, 6 Nov 2018 12:05:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1541505942; bh=mLG9ZCaIJ8+4gofyelc0OXDiSRL2Xx/TlW0/WvtaCfI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=LDh/WAIc36pStvXStyp5aKItL1+qEe42g4o33cW5SYFlwbLhqcdIbLah3z+fD/bHA hLU+dXrnQKNRr8I6vskFfDiB1ePIEkhsVsh+aIvRXLlQgMWwCqycwURP+CZw9zeBrj L3szbsqh0oGjO8FD1/uBsOR7+I24bOZYrdAMP5J4= DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org A9F6960591 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 v1 1/4] Bluetooth: hci_qca: use wait_until_sent() for power pulses Date: Tue, 6 Nov 2018 17:35:25 +0530 Message-Id: <20181106120528.30342-2-bgodavar@codeaurora.org> X-Mailer: git-send-email 2.19.1 In-Reply-To: <20181106120528.30342-1-bgodavar@codeaurora.org> References: <20181106120528.30342-1-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 wcn3990 requires a power pulse to turn ON/OFF along with regulators. Sometimes we are observing the power pulses are sent out with some time delay, due to queuing these commands. This is causing synchronization issues with chip, which intern delay the chip setup or may end up with communication issues. Signed-off-by: Balakrishna Godavarthi --- drivers/bluetooth/hci_qca.c | 22 +++++++++------------- 1 file changed, 9 insertions(+), 13 deletions(-) diff --git a/drivers/bluetooth/hci_qca.c b/drivers/bluetooth/hci_qca.c index f72ded4ec9ae..051f081d1835 100644 --- a/drivers/bluetooth/hci_qca.c +++ b/drivers/bluetooth/hci_qca.c @@ -1016,8 +1016,7 @@ static inline void host_set_baudrate(struct hci_uart *hu, unsigned int speed) static int qca_send_power_pulse(struct hci_dev *hdev, u8 cmd) { struct hci_uart *hu = hci_get_drvdata(hdev); - struct qca_data *qca = hu->priv; - struct sk_buff *skb; + int ret; /* These power pulses are single byte command which are sent * at required baudrate to wcn3990. On wcn3990, we have an external @@ -1030,18 +1029,14 @@ static int qca_send_power_pulse(struct hci_dev *hdev, u8 cmd) * sending power pulses to SoC. */ bt_dev_dbg(hdev, "sending power pulse %02x to SoC", cmd); - - skb = bt_skb_alloc(sizeof(cmd), GFP_KERNEL); - if (!skb) - return -ENOMEM; - hci_uart_set_flow_control(hu, true); + ret = serdev_device_write(hu->serdev, &cmd, sizeof(cmd), 0); + if (ret < 0) { + bt_dev_err(hdev, "failed to send power pulse %02x to SoC", cmd); + return ret; + } - skb_put_u8(skb, cmd); - hci_skb_pkt_type(skb) = HCI_COMMAND_PKT; - - skb_queue_tail(&qca->txq, skb); - hci_uart_tx_wakeup(hu); + serdev_device_wait_until_sent(hu->serdev, 0); /* Wait for 100 uS for SoC to settle down */ usleep_range(100, 200); @@ -1283,7 +1278,8 @@ static void qca_power_shutdown(struct hci_uart *hu) host_set_baudrate(hu, 2400); hci_uart_set_flow_control(hu, true); - serdev_device_write_buf(serdev, &cmd, sizeof(cmd)); + serdev_device_write(serdev, &cmd, sizeof(cmd), 0); + serdev_device_wait_until_sent(serdev, 0); hci_uart_set_flow_control(hu, false); qca_power_setup(hu, false); }