From patchwork Mon Mar 1 16:11:56 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 390038 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=-18.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, USER_AGENT_GIT autolearn=ham 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 1634EC282E0 for ; Mon, 1 Mar 2021 17:14:06 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E9AE064F4C for ; Mon, 1 Mar 2021 17:14:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237796AbhCARNU (ORCPT ); Mon, 1 Mar 2021 12:13:20 -0500 Received: from mail.kernel.org ([198.145.29.99]:35318 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237513AbhCARIV (ORCPT ); Mon, 1 Mar 2021 12:08:21 -0500 Received: by mail.kernel.org (Postfix) with ESMTPSA id 85CFF64F89; Mon, 1 Mar 2021 16:41:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1614616878; bh=1K//8isw1juxlFVhKO+odgoTL/ejvfqUNdvt0tZ8fzk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=WLFQFxgAroesq993U8EkbOW4EtbJR4Lvht5UQEdnRrJ1LyeBTABl4ooPJWVZlugG8 OKqEib/Ltm8rNvd5Wpjrac1Pm22ZTlIRp76imO2IM5e09b+FG+vg1WNrVsU3A1IHYc zTKJflSluSJpbVZyZ5me4FVNUN0soMIxpD9mAeVI= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Dan Carpenter , Sebastian Reichel , Tony Lindgren , Mark Brown , Sasha Levin Subject: [PATCH 4.19 096/247] ASoC: cpcap: fix microphone timeslot mask Date: Mon, 1 Mar 2021 17:11:56 +0100 Message-Id: <20210301161036.378775226@linuxfoundation.org> X-Mailer: git-send-email 2.30.1 In-Reply-To: <20210301161031.684018251@linuxfoundation.org> References: <20210301161031.684018251@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Sebastian Reichel [ Upstream commit de5bfae2fd962a9da99f56382305ec7966a604b9 ] The correct mask is 0x1f8 (Bit 3-8), but due to missing BIT() 0xf (Bit 0-3) was set instead. This means setting of CPCAP_BIT_MIC1_RX_TIMESLOT0 (Bit 3) still worked (part of both masks). On the other hand the code does not properly clear the other MIC timeslot bits. I think this is not a problem, since they are probably initialized to 0 and not touched by the driver anywhere else. But the mask also contains some wrong bits, that will be cleared. Bit 0 (CPCAP_BIT_SMB_CDC) should be safe, since the driver enforces it to be 0 anyways. Bit 1-2 are CPCAP_BIT_FS_INV and CPCAP_BIT_CLK_INV. This means enabling audio recording forces the codec into SND_SOC_DAIFMT_NB_NF mode, which is obviously bad. The bug probably remained undetected, because there are not many use cases for routing microphone to the CPU on platforms using cpcap and user base is small. I do remember having some issues with bad sound quality when testing voice recording back when I wrote the driver. It probably was this bug. Fixes: f6cdf2d3445d ("ASoC: cpcap: new codec") Reported-by: Dan Carpenter Signed-off-by: Sebastian Reichel Reviewed-by: Tony Lindgren Link: https://lore.kernel.org/r/20210123172945.3958622-1-sre@kernel.org Signed-off-by: Mark Brown Signed-off-by: Sasha Levin --- sound/soc/codecs/cpcap.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) diff --git a/sound/soc/codecs/cpcap.c b/sound/soc/codecs/cpcap.c index d7f05b384f1fb..1902689c5ea2c 100644 --- a/sound/soc/codecs/cpcap.c +++ b/sound/soc/codecs/cpcap.c @@ -1263,12 +1263,12 @@ static int cpcap_voice_hw_params(struct snd_pcm_substream *substream, if (direction == SNDRV_PCM_STREAM_CAPTURE) { mask = 0x0000; - mask |= CPCAP_BIT_MIC1_RX_TIMESLOT0; - mask |= CPCAP_BIT_MIC1_RX_TIMESLOT1; - mask |= CPCAP_BIT_MIC1_RX_TIMESLOT2; - mask |= CPCAP_BIT_MIC2_TIMESLOT0; - mask |= CPCAP_BIT_MIC2_TIMESLOT1; - mask |= CPCAP_BIT_MIC2_TIMESLOT2; + mask |= BIT(CPCAP_BIT_MIC1_RX_TIMESLOT0); + mask |= BIT(CPCAP_BIT_MIC1_RX_TIMESLOT1); + mask |= BIT(CPCAP_BIT_MIC1_RX_TIMESLOT2); + mask |= BIT(CPCAP_BIT_MIC2_TIMESLOT0); + mask |= BIT(CPCAP_BIT_MIC2_TIMESLOT1); + mask |= BIT(CPCAP_BIT_MIC2_TIMESLOT2); val = 0x0000; if (channels >= 2) val = BIT(CPCAP_BIT_MIC1_RX_TIMESLOT0);