From nobody Tue Dec 16 08:59:48 2025 Received: from relay6-d.mail.gandi.net (relay6-d.mail.gandi.net [217.70.183.198]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 47C3C187845; Thu, 8 Aug 2024 07:11:46 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.70.183.198 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1723101109; cv=none; b=g/F8zRwU62ErQzg77FHnknheQBH5OzGuDbPmwnQoaMC5mkOjZAzxzDFJjnCly5IH+PKWtZZFW6iavAejpa/n9Y0fbUTgOjiVAe/WhbIBM4FtKy27CY/tAlboSIjYc6ccpxWUzNV/f1l8kqleTx99DOjARiVX/mXTfPSoJyIsbPg= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1723101109; c=relaxed/simple; bh=LMXtIrcdC4H9G0lbWS6XSXvCMbNu5NBZqkE0JDrJLOA=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=rf2oSmmOLVZBmf2f+32RH3h+oCY5vfcOR0UBoyPkkiHQp8Mqi9tTy4euznQo9zp29URvTSqCX6l893gbRIARSQy2jMCQvrRBXleood1mBSmIdbwdsC52sag8Nbq+m5j1kNzjlBt6OgWcaoR9ct36we3QLGiL8vFZ1dwbmm4R+ss= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=bootlin.com; spf=pass smtp.mailfrom=bootlin.com; dkim=pass (2048-bit key) header.d=bootlin.com header.i=@bootlin.com header.b=gN0Uk/uq; arc=none smtp.client-ip=217.70.183.198 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=bootlin.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=bootlin.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=bootlin.com header.i=@bootlin.com header.b="gN0Uk/uq" Received: by mail.gandi.net (Postfix) with ESMTPA id 90A4EC0009; Thu, 8 Aug 2024 07:11:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1723101099; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=O1sNai9Jq2u7qPOllWQVrRFQ040G46WCUggP4JjIwzw=; b=gN0Uk/uqPGnTJ6esXWrtABtNBxnV4yIYif8QxXp/26PxdMvJIF8+ln3j2iWbJExBMXWwdv EUqX566FoQ7JYaGSTsUc5q27vmLFMqURO6dDWKjtXv1zvTU+pib0UncbHMXpb/Wy9ypA2D f2Eifo/uWZpMOoPIv9BLZhmnE8WfYsMKDl9UbpP8kc4UEbNADAkqgJ2kUEEn0uesVDXuFt LJKyvkZBpBuhY06XT8xKLgiTkVM9M44jHsPecZRtP9bdUQfnfJ9REoo4PayPcbuuudW3z7 tuW79gJL2vSc7kJx9JNDWKyupzpwyZdOTgjeSd+1BWH5NyfwmddTH1a2gOOMkA== From: Herve Codina To: Herve Codina , Christophe Leroy , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Qiang Zhao , Li Yang , Mark Brown Cc: linuxppc-dev@lists.ozlabs.org, linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Thomas Petazzoni , stable@vger.kernel.org Subject: [PATCH v2 01/36] soc: fsl: cpm1: qmc: Update TRNSYNC only in transparent mode Date: Thu, 8 Aug 2024 09:10:54 +0200 Message-ID: <20240808071132.149251-2-herve.codina@bootlin.com> X-Mailer: git-send-email 2.45.0 In-Reply-To: <20240808071132.149251-1-herve.codina@bootlin.com> References: <20240808071132.149251-1-herve.codina@bootlin.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-GND-Sasl: herve.codina@bootlin.com Content-Type: text/plain; charset="utf-8" The TRNSYNC feature is available (and enabled) only in transparent mode. Since commit 7cc9bda9c163 ("soc: fsl: cpm1: qmc: Handle timeslot entries at channel start() and stop()") TRNSYNC register is updated in transparent and hdlc mode. In hdlc mode, the address of the TRNSYNC register is used by the QMC for other internal purpose. Even if no weird results were observed in hdlc mode, touching this register in this mode is wrong. Update TRNSYNC only in transparent mode. Fixes: 7cc9bda9c163 ("soc: fsl: cpm1: qmc: Handle timeslot entries at chann= el start() and stop()") Cc: stable@vger.kernel.org Signed-off-by: Herve Codina Reviewed-by: Christophe Leroy --- drivers/soc/fsl/qe/qmc.c | 24 ++++++++++++++---------- 1 file changed, 14 insertions(+), 10 deletions(-) diff --git a/drivers/soc/fsl/qe/qmc.c b/drivers/soc/fsl/qe/qmc.c index 76bb496305a0..bacabf731dcb 100644 --- a/drivers/soc/fsl/qe/qmc.c +++ b/drivers/soc/fsl/qe/qmc.c @@ -940,11 +940,13 @@ static int qmc_chan_start_rx(struct qmc_chan *chan) goto end; } =20 - ret =3D qmc_setup_chan_trnsync(chan->qmc, chan); - if (ret) { - dev_err(chan->qmc->dev, "chan %u: setup TRNSYNC failed (%d)\n", - chan->id, ret); - goto end; + if (chan->mode =3D=3D QMC_TRANSPARENT) { + ret =3D qmc_setup_chan_trnsync(chan->qmc, chan); + if (ret) { + dev_err(chan->qmc->dev, "chan %u: setup TRNSYNC failed (%d)\n", + chan->id, ret); + goto end; + } } =20 /* Restart the receiver */ @@ -982,11 +984,13 @@ static int qmc_chan_start_tx(struct qmc_chan *chan) goto end; } =20 - ret =3D qmc_setup_chan_trnsync(chan->qmc, chan); - if (ret) { - dev_err(chan->qmc->dev, "chan %u: setup TRNSYNC failed (%d)\n", - chan->id, ret); - goto end; + if (chan->mode =3D=3D QMC_TRANSPARENT) { + ret =3D qmc_setup_chan_trnsync(chan->qmc, chan); + if (ret) { + dev_err(chan->qmc->dev, "chan %u: setup TRNSYNC failed (%d)\n", + chan->id, ret); + goto end; + } } =20 /* --=20 2.45.0