linux-kernel - Re: Issues with i.MX SPI DMA transfers

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Message-ID: <20190328065247.uz73lap7ljf5q3tb@pengutronix.de>
Date:   Thu, 28 Mar 2019 07:52:47 +0100
From:   Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>
To:     Igor Plyatov <plyatov@...il.com>
Cc:     linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-spi@...r.kernel.org, NXP Linux Team <linux-imx@....com>,
        Fabio Estevam <festevam@...il.com>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Shawn Guo <shawnguo@...nel.org>,
        Mark Brown <broonie@...nel.org>, dmaengine@...r.kernel.org,
        Vinod Koul <vkoul@...nel.org>,
        Dan Williams <dan.j.williams@...el.com>,
        Andy Duan <fugang.duan@....com>, Han Xu <han.xu@....com>,
        Robin Gong <yibin.gong@....com>,
        Clark Wang <xiaoning.wang@....com>
Subject: Re: Issues with i.MX SPI DMA transfers

Hello Igor,

On Wed, Mar 27, 2019 at 08:40:00PM +0300, Igor Plyatov wrote:
> please, help to resolve two issues with SPI DMA transfers at i.MX6Q
> platform.
> 
> First issue is
>  [ 4465.008003] spi_master spi0: I/O Error in DMA RX
> 
> Second issue is duplication for one of received bytes.
> 
> Probably, these issues related to each one.

This is probably the same problem I hit some time ago. Check ERR009165
in the errata. You either need to disable DMA or need a fixed
sdma-Script.

Best regards
Uwe

-- 
Pengutronix e.K.                           | Uwe Kleine-König            |
Industrial Linux Solutions                 | http://www.pengutronix.de/  |