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Tue, 3 Feb 2026 03:13:07 +0000 Received: from VI1PR04MB7055.eurprd04.prod.outlook.com ([fe80::d6ab:1538:d868:bf8]) by VI1PR04MB7055.eurprd04.prod.outlook.com ([fe80::d6ab:1538:d868:bf8%7]) with mapi id 15.20.9564.014; Tue, 3 Feb 2026 03:13:07 +0000 From: Shengjiu Wang To: lgirdwood@gmail.com, broonie@kernel.org, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, shawnguo@kernel.org, s.hauer@pengutronix.de, kernel@pengutronix.de, festevam@gmail.com, linux-sound@vger.kernel.org, devicetree@vger.kernel.org, imx@lists.linux.dev, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, shengjiu.wang@gmail.com, Xiubo.Lee@gmail.com, nicoleotsuka@gmail.com, perex@perex.cz, tiwai@suse.com, linuxppc-dev@lists.ozlabs.org Subject: [PATCH v3 4/4] ASoC: fsl_asrc_dma: allocate memory from dma device Date: Tue, 3 Feb 2026 11:13:45 +0800 Message-Id: <20260203031345.3850533-5-shengjiu.wang@nxp.com> X-Mailer: git-send-email 2.37.1 In-Reply-To: <20260203031345.3850533-1-shengjiu.wang@nxp.com> References: <20260203031345.3850533-1-shengjiu.wang@nxp.com> Content-Transfer-Encoding: 8bit Content-Type: text/plain X-ClientProxiedBy: SI1PR02CA0040.apcprd02.prod.outlook.com (2603:1096:4:1f6::7) To VI1PR04MB7055.eurprd04.prod.outlook.com (2603:10a6:800:123::21) X-Mailing-List: linuxppc-dev@lists.ozlabs.org List-Id: List-Help: List-Owner: List-Post: List-Archive: , List-Subscribe: , , List-Unsubscribe: Precedence: list MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: VI1PR04MB7055:EE_|GV2PR04MB12271:EE_ X-MS-Office365-Filtering-Correlation-Id: c7421a48-e716-488c-59ac-08de62d226f8 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|52116014|7416014|376014|1800799024|19092799006|366016|38350700014|921020; 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On i.MX952, one of EDMA devices support such feature, in order to support the EDMA device, the memory needs to be allocated from the DMA device. The code change here is to make this driver compatible for non dma-coherent and dma-coherent dma devices. Signed-off-by: Shengjiu Wang --- sound/soc/fsl/fsl_asrc_dma.c | 48 ++++++++++++++++++++++++++++++------ 1 file changed, 41 insertions(+), 7 deletions(-) diff --git a/sound/soc/fsl/fsl_asrc_dma.c b/sound/soc/fsl/fsl_asrc_dma.c index 7dacc06b2f02..348b0aabfa68 100644 --- a/sound/soc/fsl/fsl_asrc_dma.c +++ b/sound/soc/fsl/fsl_asrc_dma.c @@ -449,18 +449,52 @@ fsl_asrc_dma_pcm_pointer(struct snd_soc_component *component, static int fsl_asrc_dma_pcm_new(struct snd_soc_component *component, struct snd_soc_pcm_runtime *rtd) { - struct snd_card *card = rtd->card->snd_card; + struct device *dev = component->dev; + struct fsl_asrc *asrc = dev_get_drvdata(dev); + struct fsl_asrc_pair *pair; struct snd_pcm *pcm = rtd->pcm; + struct dma_chan *chan; int ret; - ret = dma_coerce_mask_and_coherent(card->dev, DMA_BIT_MASK(32)); - if (ret) { - dev_err(card->dev, "failed to set DMA mask\n"); - return ret; + pair = kzalloc(size_add(sizeof(*pair), asrc->pair_priv_size), GFP_KERNEL); + if (!pair) + return -ENOMEM; + + pair->asrc = asrc; + pair->private = (void *)pair + sizeof(struct fsl_asrc_pair); + + /* Request a pair, which will be released later. + * Request pair function needs channel num as input, for this + * pair, we just request "1" channel temporarily. + */ + ret = asrc->request_pair(1, pair); + if (ret < 0) { + dev_err(dev, "failed to request asrc pair\n"); + goto req_pair_err; + } + + /* Request a dma channel, which will be released later. */ + chan = asrc->get_dma_channel(pair, IN); + if (!chan) { + dev_err(dev, "failed to get dma channel\n"); + ret = -EINVAL; + goto dma_chan_err; } - return snd_pcm_set_fixed_buffer_all(pcm, SNDRV_DMA_TYPE_DEV, - card->dev, FSL_ASRC_DMABUF_SIZE); + ret = snd_pcm_set_fixed_buffer_all(pcm, + SNDRV_DMA_TYPE_DEV, + chan->device->dev, + FSL_ASRC_DMABUF_SIZE); + + dma_release_channel(chan); + +dma_chan_err: + asrc->release_pair(pair); + +req_pair_err: + kfree(pair); + + return ret; } struct snd_soc_component_driver fsl_asrc_component = { -- 2.34.1