linux-kernel - RE: [PATCH v7 RESEND 07/13] spi: imx: fix ERR009165

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Message-ID: <VE1PR04MB6638857DD94A05DC7252E69589BF0@VE1PR04MB6638.eurprd04.prod.outlook.com>
Date:   Wed, 13 May 2020 08:52:39 +0000
From:   Robin Gong <yibin.gong@....com>
To:     Sascha Hauer <s.hauer@...gutronix.de>
CC:     "vkoul@...nel.org" <vkoul@...nel.org>,
        "shawnguo@...nel.org" <shawnguo@...nel.org>,
        "u.kleine-koenig@...gutronix.de" <u.kleine-koenig@...gutronix.de>,
        "robh+dt@...nel.org" <robh+dt@...nel.org>,
        "festevam@...il.com" <festevam@...il.com>,
        "dan.j.williams@...el.com" <dan.j.williams@...el.com>,
        "mark.rutland@....com" <mark.rutland@....com>,
        "catalin.marinas@....com" <catalin.marinas@....com>,
        "will.deacon@....com" <will.deacon@....com>,
        "l.stach@...gutronix.de" <l.stach@...gutronix.de>,
        "martin.fuzzey@...wbird.group" <martin.fuzzey@...wbird.group>,
        "kernel@...gutronix.de" <kernel@...gutronix.de>,
        "linux-spi@...r.kernel.org" <linux-spi@...r.kernel.org>,
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        <linux-arm-kernel@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        dl-linux-imx <linux-imx@....com>,
        "dmaengine@...r.kernel.org" <dmaengine@...r.kernel.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>
Subject: RE: [PATCH v7 RESEND 07/13] spi: imx: fix ERR009165

On 2020/05/13 16:48 Sascha Hauer <s.hauer@...gutronix.de> wrote:
> On Wed, May 13, 2020 at 08:38:26AM +0000, Robin Gong wrote:
> > On 2020/05/13 Sascha Hauer <s.hauer@...gutronix.de> wrote:
> > > This patch is the one bisecting will end up with when somebody uses
> > > an older SDMA firmware or the ROM scripts. It should have a better
> > > description what happens and what should be done about it.
> > Emm..That's true. Timeout will be caught in such case, hence, maybe we can
> fall back it to pio always.
> 
> With my patch applied sdma_load_context() will fail. I don't know how exactly
> this hits into the SPI driver, but it won't be a timeout.
Thanks for your quick test, assume you use ROM firmware, right?