From nobody Wed Dec 17 09:12:46 2025 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 9AA45C4167B for ; Tue, 5 Dec 2023 15:21:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1442426AbjLEPVe (ORCPT ); Tue, 5 Dec 2023 10:21:34 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39496 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1442399AbjLEPVZ (ORCPT ); Tue, 5 Dec 2023 10:21:25 -0500 Received: from relay2-d.mail.gandi.net (relay2-d.mail.gandi.net [217.70.183.194]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 76700BF for ; Tue, 5 Dec 2023 07:21:31 -0800 (PST) Received: by mail.gandi.net (Postfix) with ESMTPA id 5018140010; Tue, 5 Dec 2023 15:21:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1701789690; 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=oTsZ03wdLe2jX7b5CbBFQq2qQh274AFtQjsKmPdMnuY=; b=aLiE+WIn02wlJInTUmiuNrEeMsfvNJmP7q6RldXeW/G25MZb729t/cgIKuJGxVcNsU3gKt yvZzMFxGU9YZnZlfEWiKTD2RNIxQBJuokUuPgJ53ASN2X9Xw96NIn4WbdG1dph+GCwb2kK ppWks68v0d9y3Z3jSX5BA89LGb3MeRs4ewEchlwZbuP87dhRmffbmoxQHRNLY4oZcY5RJS WCl9khI+xSADBPielBK1VtS5RH0IhUSdhUS+WptRYPunN0Yhjkg/0bqdgOyaCwOsIPxy8O IIXvHo61rc+Cb2+RlLo/yINWTHchEu1t/jJ03IIwDhkW8fZ3Y/+iVpp0nYyJbA== From: Herve Codina To: Herve Codina , Qiang Zhao , Li Yang , Jakub Kicinski , Shengjiu Wang , Xiubo Li , Fabio Estevam , Nicolin Chen , Liam Girdwood , Mark Brown , Jaroslav Kysela , Takashi Iwai , Christophe Leroy Cc: Arnd Bergmann , linuxppc-dev@lists.ozlabs.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, alsa-devel@alsa-project.org, Thomas Petazzoni Subject: [PATCH v2 04/17] soc: fsl: cpm1: qmc: Extend the API to provide Rx status Date: Tue, 5 Dec 2023 16:21:01 +0100 Message-ID: <20231205152116.122512-5-herve.codina@bootlin.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20231205152116.122512-1-herve.codina@bootlin.com> References: <20231205152116.122512-1-herve.codina@bootlin.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-GND-Sasl: herve.codina@bootlin.com Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" In HDLC mode, some status flags related to the data read transfer can be set by the hardware and need to be known by a QMC consumer for further analysis. Extend the API in order to provide these transfer status flags at the read complete() call. In TRANSPARENT mode, these flags have no meaning. Keep only one read complete() API and update the consumers working in transparent mode. In this case, the newly introduced flags parameter is simply unused. Signed-off-by: Herve Codina Reviewed-by: Christophe Leroy --- drivers/soc/fsl/qe/qmc.c | 29 +++++++++++++++++++++++++---- include/soc/fsl/qe/qmc.h | 15 ++++++++++++++- sound/soc/fsl/fsl_qmc_audio.c | 2 +- 3 files changed, 40 insertions(+), 6 deletions(-) diff --git a/drivers/soc/fsl/qe/qmc.c b/drivers/soc/fsl/qe/qmc.c index 2312152a44b3..4b4832d93c9b 100644 --- a/drivers/soc/fsl/qe/qmc.c +++ b/drivers/soc/fsl/qe/qmc.c @@ -166,7 +166,7 @@ struct qmc_xfer_desc { union { void (*tx_complete)(void *context); - void (*rx_complete)(void *context, size_t length); + void (*rx_complete)(void *context, size_t length, unsigned int flags); }; void *context; }; @@ -421,7 +421,8 @@ static void qmc_chan_write_done(struct qmc_chan *chan) } =20 int qmc_chan_read_submit(struct qmc_chan *chan, dma_addr_t addr, size_t le= ngth, - void (*complete)(void *context, size_t length), void *context) + void (*complete)(void *context, size_t length, unsigned int flags), + void *context) { struct qmc_xfer_desc *xfer_desc; unsigned long flags; @@ -454,6 +455,10 @@ int qmc_chan_read_submit(struct qmc_chan *chan, dma_ad= dr_t addr, size_t length, xfer_desc->rx_complete =3D complete; xfer_desc->context =3D context; =20 + /* Clear previous status flags */ + ctrl &=3D ~(QMC_BD_RX_L | QMC_BD_RX_F | QMC_BD_RX_LG | QMC_BD_RX_NO | + QMC_BD_RX_AB | QMC_BD_RX_CR); + /* Activate the descriptor */ ctrl |=3D (QMC_BD_RX_E | QMC_BD_RX_UB); wmb(); /* Be sure to flush data before descriptor activation */ @@ -485,7 +490,7 @@ EXPORT_SYMBOL(qmc_chan_read_submit); =20 static void qmc_chan_read_done(struct qmc_chan *chan) { - void (*complete)(void *context, size_t size); + void (*complete)(void *context, size_t size, unsigned int flags); struct qmc_xfer_desc *xfer_desc; unsigned long flags; cbd_t __iomem *bd; @@ -527,7 +532,23 @@ static void qmc_chan_read_done(struct qmc_chan *chan) =20 if (complete) { spin_unlock_irqrestore(&chan->rx_lock, flags); - complete(context, datalen); + + /* + * Avoid conversion between internal hardware flags and + * the software API flags. + * -> Be sure that the software API flags are consistent + * with the hardware flags + */ + BUILD_BUG_ON(QMC_RX_FLAG_HDLC_LAST !=3D QMC_BD_RX_L); + BUILD_BUG_ON(QMC_RX_FLAG_HDLC_FIRST !=3D QMC_BD_RX_F); + BUILD_BUG_ON(QMC_RX_FLAG_HDLC_OVF !=3D QMC_BD_RX_LG); + BUILD_BUG_ON(QMC_RX_FLAG_HDLC_UNA !=3D QMC_BD_RX_NO); + BUILD_BUG_ON(QMC_RX_FLAG_HDLC_ABORT !=3D QMC_BD_RX_AB); + BUILD_BUG_ON(QMC_RX_FLAG_HDLC_CRC !=3D QMC_BD_RX_CR); + + complete(context, datalen, + ctrl & (QMC_BD_RX_L | QMC_BD_RX_F | QMC_BD_RX_LG | + QMC_BD_RX_NO | QMC_BD_RX_AB | QMC_BD_RX_CR)); spin_lock_irqsave(&chan->rx_lock, flags); } =20 diff --git a/include/soc/fsl/qe/qmc.h b/include/soc/fsl/qe/qmc.h index 3c61a50d2ae2..6f1d6cebc9fe 100644 --- a/include/soc/fsl/qe/qmc.h +++ b/include/soc/fsl/qe/qmc.h @@ -9,6 +9,7 @@ #ifndef __SOC_FSL_QMC_H__ #define __SOC_FSL_QMC_H__ =20 +#include #include =20 struct device_node; @@ -56,8 +57,20 @@ int qmc_chan_set_param(struct qmc_chan *chan, const stru= ct qmc_chan_param *param int qmc_chan_write_submit(struct qmc_chan *chan, dma_addr_t addr, size_t l= ength, void (*complete)(void *context), void *context); =20 +/* Flags available (ORed) for read complete() flags parameter in HDLC mode. + * No flags are available in transparent mode and the read complete() flags + * parameter has no meaning in transparent mode. + */ +#define QMC_RX_FLAG_HDLC_LAST BIT(11) /* Last in frame */ +#define QMC_RX_FLAG_HDLC_FIRST BIT(10) /* First in frame */ +#define QMC_RX_FLAG_HDLC_OVF BIT(5) /* Data overflow */ +#define QMC_RX_FLAG_HDLC_UNA BIT(4) /* Unaligned (ie. bits received not m= ultiple of 8) */ +#define QMC_RX_FLAG_HDLC_ABORT BIT(3) /* Received an abort sequence (seve= n consecutive ones) */ +#define QMC_RX_FLAG_HDLC_CRC BIT(2) /* CRC error */ + int qmc_chan_read_submit(struct qmc_chan *chan, dma_addr_t addr, size_t le= ngth, - void (*complete)(void *context, size_t length), + void (*complete)(void *context, size_t length, + unsigned int flags), void *context); =20 #define QMC_CHAN_READ (1<<0) diff --git a/sound/soc/fsl/fsl_qmc_audio.c b/sound/soc/fsl/fsl_qmc_audio.c index 56d6b0b039a2..bfaaa451735b 100644 --- a/sound/soc/fsl/fsl_qmc_audio.c +++ b/sound/soc/fsl/fsl_qmc_audio.c @@ -99,7 +99,7 @@ static void qmc_audio_pcm_write_complete(void *context) snd_pcm_period_elapsed(prtd->substream); } =20 -static void qmc_audio_pcm_read_complete(void *context, size_t length) +static void qmc_audio_pcm_read_complete(void *context, size_t length, unsi= gned int flags) { struct qmc_dai_prtd *prtd =3D context; int ret; --=20 2.43.0