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=-9.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,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 BB9FFC2D0CE for ; Sun, 29 Dec 2019 17:38:36 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 896EA206CB for ; Sun, 29 Dec 2019 17:38:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1577641116; bh=AcoGWRgx/vXGfpAmvkjjtO8qeWALbMXVFbBsRPO3QPU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=mfeZRln5meoMsr5wWEIMeaTWCV84bU3ordkNl0ndWCxQQvaB/ExSLzfvCO2RZDNhg Mb9MALU4iS+F+CtjePrWfjsxfAvfoZwnJ4TU0tpjPPGe8stB0nnV2x81lkVuLzROfA tvza105a84YW8f0yNuE+QVW+Jwf5D7NKp4AhY2XY= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729599AbfL2ReM (ORCPT ); Sun, 29 Dec 2019 12:34:12 -0500 Received: from mail.kernel.org ([198.145.29.99]:37070 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728633AbfL2ReM (ORCPT ); Sun, 29 Dec 2019 12:34:12 -0500 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 9B1F12465B; Sun, 29 Dec 2019 17:34:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1577640852; bh=AcoGWRgx/vXGfpAmvkjjtO8qeWALbMXVFbBsRPO3QPU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=R4TUsLsUPLieWBZEaSNfkFztN4ckDVjLcCINwDcNK1VUrG72FLFX9l2y6SmpaZV5R qjXdj0cUjBnxgqd/xl6O5BWiFnd5+6/af/OZ6+2NyTYOUsL3PmMq0XfxLnrM+ZQcjl /Qnjb8qEKfXckzKku9XNKGpbTL9nChOKI/mltg30= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Michael Walle , Charles Keepax , Mark Brown , Sasha Levin Subject: [PATCH 4.19 164/219] ASoC: wm8904: fix regcache handling Date: Sun, 29 Dec 2019 18:19:26 +0100 Message-Id: <20191229162533.483956682@linuxfoundation.org> X-Mailer: git-send-email 2.24.1 In-Reply-To: <20191229162508.458551679@linuxfoundation.org> References: <20191229162508.458551679@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Michael Walle [ Upstream commit e9149b8c00d25dbaef1aa174fc604bed207e576d ] The current code assumes that the power is turned off in SND_SOC_BIAS_OFF. If there are no actual regulator the codec isn't turned off and the registers are not reset to their default values but the regcache is still marked as dirty. Thus a value might not be written to the hardware if it is set to the default value. Do a software reset before turning off the power to make sure the registers are always reset to their default states. Signed-off-by: Michael Walle Acked-by: Charles Keepax Link: https://lore.kernel.org/r/20191112223629.21867-1-michael@walle.cc Signed-off-by: Mark Brown Signed-off-by: Sasha Levin --- sound/soc/codecs/wm8904.c | 1 + 1 file changed, 1 insertion(+) diff --git a/sound/soc/codecs/wm8904.c b/sound/soc/codecs/wm8904.c index 1965635ec07c..d14e851b9160 100644 --- a/sound/soc/codecs/wm8904.c +++ b/sound/soc/codecs/wm8904.c @@ -1902,6 +1902,7 @@ static int wm8904_set_bias_level(struct snd_soc_component *component, snd_soc_component_update_bits(component, WM8904_BIAS_CONTROL_0, WM8904_BIAS_ENA, 0); + snd_soc_component_write(component, WM8904_SW_RESET_AND_ID, 0); regcache_cache_only(wm8904->regmap, true); regcache_mark_dirty(wm8904->regmap); -- 2.20.1