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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7EB7AC4332F for ; Wed, 23 Nov 2022 14:52:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237802AbiKWOv7 (ORCPT ); Wed, 23 Nov 2022 09:51:59 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51934 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237521AbiKWOvz (ORCPT ); Wed, 23 Nov 2022 09:51:55 -0500 Received: from mx0b-001ae601.pphosted.com (mx0b-001ae601.pphosted.com [67.231.152.168]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id CC91E6CA0E for ; Wed, 23 Nov 2022 06:51:53 -0800 (PST) Received: from pps.filterd (m0077474.ppops.net [127.0.0.1]) by mx0b-001ae601.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 2ANCx7LG007136; Wed, 23 Nov 2022 08:51:42 -0600 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=cirrus.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-transfer-encoding : content-type; s=PODMain02222019; bh=undvmwFEvRPQUPi2f8r9jtjOCibt7dyqMNuLYGsabHA=; b=C6sKHQ//QyVxbzFLvfXk1hUnq9S+nLYMJOfg7WiBLunL/PUng3EtgZJtl8O5YQuJYq3y HMGjbI033aSLdkJlsReJp5HcZZDReRvo7W0uUZRAJ/JEGy9hzlk7PwYlSIgylpddrkB2 jo+maXOKAksWr18q3dMtKVbvZ3gmLnWeym7ibh+eDp4W8lgmKQ18GdQTRpIB1HeHCIsK 0G7JrT/ifYekjF9h465NbOEejQJTDEsuQ4edBBsK1ms+7bKEPNV6TBV2KrklJ5CClVgd hns8VPlqtDOcWpyNK31CGyNpreLvPH8LrRHWl08Bjj2Jy0MblIhN4UYIjWc9ZqJYdTcz PA== Received: from ediex02.ad.cirrus.com ([84.19.233.68]) by mx0b-001ae601.pphosted.com (PPS) with ESMTPS id 3kxvet50xm-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 23 Nov 2022 08:51:41 -0600 Received: from ediex01.ad.cirrus.com (198.61.84.80) by ediex02.ad.cirrus.com (198.61.84.81) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.20; Wed, 23 Nov 2022 08:51:40 -0600 Received: from ediswmail.ad.cirrus.com (198.61.86.93) by ediex01.ad.cirrus.com (198.61.84.80) with Microsoft SMTP Server id 15.2.1118.20 via Frontend Transport; Wed, 23 Nov 2022 08:51:40 -0600 Received: from edi-sw-dsktp-006.ad.cirrus.com (edi-sw-dsktp-006.ad.cirrus.com [198.90.251.111]) by ediswmail.ad.cirrus.com (Postfix) with ESMTP id 4C315477; Wed, 23 Nov 2022 14:51:40 +0000 (UTC) From: Richard Fitzgerald To: CC: , , , Simon Trimmer , Richard Fitzgerald Subject: [PATCH 1/2] firmware: cs_dsp: cs_dsp_coeff_write_ctrl() should report changed Date: Wed, 23 Nov 2022 14:51:39 +0000 Message-ID: <20221123145140.2784030-2-rf@opensource.cirrus.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20221123145140.2784030-1-rf@opensource.cirrus.com> References: <20221123145140.2784030-1-rf@opensource.cirrus.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-Proofpoint-ORIG-GUID: 44NsEcHOr4WNNh2kdIeq-NZ5zx1vXxrk X-Proofpoint-GUID: 44NsEcHOr4WNNh2kdIeq-NZ5zx1vXxrk X-Proofpoint-Spam-Reason: safe Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Simon Trimmer ALSA callers need to know whether there was a change to the value so that they can report a control write change correctly. Signed-off-by: Simon Trimmer Signed-off-by: Richard Fitzgerald --- drivers/firmware/cirrus/cs_dsp.c | 17 ++++++++++++----- 1 file changed, 12 insertions(+), 5 deletions(-) diff --git a/drivers/firmware/cirrus/cs_dsp.c b/drivers/firmware/cirrus/cs_dsp.c index 81cc3d0f6eec..17b7198b87dc 100644 --- a/drivers/firmware/cirrus/cs_dsp.c +++ b/drivers/firmware/cirrus/cs_dsp.c @@ -752,7 +752,7 @@ static int cs_dsp_coeff_write_ctrl_raw(struct cs_dsp_coeff_ctl *ctl, * * Must be called with pwr_lock held. * - * Return: Zero for success, a negative number on error. + * Return: < 0 on error, 1 when the control value changed and 0 when it has not. */ int cs_dsp_coeff_write_ctrl(struct cs_dsp_coeff_ctl *ctl, unsigned int off, const void *buf, size_t len) @@ -767,16 +767,23 @@ int cs_dsp_coeff_write_ctrl(struct cs_dsp_coeff_ctl *ctl, if (len + off * sizeof(u32) > ctl->len) return -EINVAL; - if (ctl->flags & WMFW_CTL_FLAG_VOLATILE) + if (ctl->flags & WMFW_CTL_FLAG_VOLATILE) { ret = -EPERM; - else if (buf != ctl->cache) - memcpy(ctl->cache + off * sizeof(u32), buf, len); + } else if (buf != ctl->cache) { + if (memcmp(ctl->cache + off * sizeof(u32), buf, len)) + memcpy(ctl->cache + off * sizeof(u32), buf, len); + else + return 0; + } ctl->set = 1; if (ctl->enabled && ctl->dsp->running) ret = cs_dsp_coeff_write_ctrl_raw(ctl, off, buf, len); - return ret; + if (ret < 0) + return ret; + + return 1; } EXPORT_SYMBOL_GPL(cs_dsp_coeff_write_ctrl); -- 2.30.2