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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id CC7DBC433F5 for ; Tue, 28 Sep 2021 12:18:32 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A6E4860FE8 for ; Tue, 28 Sep 2021 12:18:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240467AbhI1MUJ (ORCPT ); Tue, 28 Sep 2021 08:20:09 -0400 Received: from so254-9.mailgun.net ([198.61.254.9]:38723 "EHLO so254-9.mailgun.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S240676AbhI1MT6 (ORCPT ); Tue, 28 Sep 2021 08:19:58 -0400 DKIM-Signature: a=rsa-sha256; v=1; c=relaxed/relaxed; d=mg.codeaurora.org; q=dns/txt; s=smtp; t=1632831499; h=Message-ID: References: In-Reply-To: Subject: Cc: To: From: Date: Content-Transfer-Encoding: Content-Type: MIME-Version: Sender; bh=XVITHsJ9eg8UKU/x0/Au9E7feURfvVXtzCIeg+cG94I=; b=KTSRmzSJkA0HDYtBq7nTPb34CCN1ZvQ0oOwo+h5c9uG9h6h85+dZgeBYzkERv70qRfZQqkyp 7JdsutoEBDAnIBpPipM+Bzdwqdi6yWOugDeuls7iuh5fMMLGcqHALXQ7z6+nAJXc6qJXnXsC pD0NNBmpyazRflQZEwTGQCmGtbQ= X-Mailgun-Sending-Ip: 198.61.254.9 X-Mailgun-Sid: WyI0MWYwYSIsICJsaW51eC1rZXJuZWxAdmdlci5rZXJuZWwub3JnIiwgImJlOWU0YSJd Received: from smtp.codeaurora.org (ec2-35-166-182-171.us-west-2.compute.amazonaws.com [35.166.182.171]) by smtp-out-n02.prod.us-west-2.postgun.com with SMTP id 615307d9a5a9bab6e891c511 (version=TLS1.2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256); Tue, 28 Sep 2021 12:17:29 GMT Sender: mdalam=codeaurora.org@mg.codeaurora.org Received: by smtp.codeaurora.org (Postfix, from userid 1001) id C0ED1C43619; Tue, 28 Sep 2021 12:17:28 +0000 (UTC) Received: from mail.codeaurora.org (localhost.localdomain [127.0.0.1]) (using TLSv1 with cipher ECDHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) (Authenticated sender: mdalam) by smtp.codeaurora.org (Postfix) with ESMTPSA id 40AAEC43617; Tue, 28 Sep 2021 12:17:27 +0000 (UTC) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 7bit Date: Tue, 28 Sep 2021 17:47:27 +0530 From: mdalam@codeaurora.org To: miquel.raynal@bootlin.com, mani@kernel.org, linux-mtd@lists.infradead.org, linux-kernel@vger.kernel.org Cc: sricharan@codeaurora.org Subject: Re: [PATCH 1/3] mtd: rawnand: qcom: Add support for status pipe In-Reply-To: <1631699851-12172-2-git-send-email-mdalam@codeaurora.org> References: <1631699851-12172-1-git-send-email-mdalam@codeaurora.org> <1631699851-12172-2-git-send-email-mdalam@codeaurora.org> Message-ID: <97df48e5505c4e6ae3bc6b7e953c156c@codeaurora.org> X-Sender: mdalam@codeaurora.org User-Agent: Roundcube Webmail/1.3.9 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 2021-09-15 15:27, Md Sadre Alam wrote: > From QPIC V2.0 onwards there is a separate pipe > to read status of each code word, called "status" pipe. > > "status" pipe will use to read CW status in case of > enhanced read mode like page scope read, multi page read. > > Signed-off-by: Md Sadre Alam > --- > drivers/mtd/nand/raw/qcom_nandc.c | 14 ++++++++++++++ > 1 file changed, 14 insertions(+) > > diff --git a/drivers/mtd/nand/raw/qcom_nandc.c > b/drivers/mtd/nand/raw/qcom_nandc.c > index 04e6f7b..42c6291 100644 > --- a/drivers/mtd/nand/raw/qcom_nandc.c > +++ b/drivers/mtd/nand/raw/qcom_nandc.c > @@ -389,6 +389,7 @@ struct qcom_nand_controller { > struct dma_chan *tx_chan; > struct dma_chan *rx_chan; > struct dma_chan *cmd_chan; > + struct dma_chan *sts_chan; > }; > > /* will be used only by EBI2 for ADM DMA */ > @@ -2737,6 +2738,11 @@ static void qcom_nandc_unalloc(struct > qcom_nand_controller *nandc) > > if (nandc->cmd_chan) > dma_release_channel(nandc->cmd_chan); > + > + if (nandc->props->qpic_v2) { > + if (nandc->sts_chan) > + dma_release_channel(nandc->sts_chan); > + } > } else { > if (nandc->chan) > dma_release_channel(nandc->chan); > @@ -2815,6 +2821,14 @@ static int qcom_nandc_alloc(struct > qcom_nand_controller *nandc) > goto unalloc; > } > > + if (nandc->props->qpic_v2) { > + nandc->sts_chan = dma_request_slave_channel(nandc->dev, "sts"); > + if (!nandc->sts_chan) { > + dev_err(nandc->dev, "failed to request sts channel\n"); > + return -ENODEV; > + } > + } > + > /* > * Initially allocate BAM transaction to read ONFI param page. > * After detecting all the devices, this BAM transaction will Ping! Please provide me some updates on this patch.