From: "Jakub Kiciński" <moorray3@wp.pl>
To: Eddie Huang <eddie.huang@mediatek.com>
Cc: "Mark Brown" <broonie@kernel.org>,
"Leilk Liu (刘磊) " <Leilk.Liu@mediatek.com>,
"Mark Rutland" <mark.rutland@arm.com>,
"Matthias Brugger" <matthias.bgg@gmail.com>,
"Rob Herring" <robh+dt@kernel.org>,
"Pawel Moll" <pawel.moll@arm.com>,
"Ian Campbell" <ijc+devicetree@hellion.org.uk>,
"Kumar Gala" <galak@codeaurora.org>,
"Catalin Marinas" <catalin.marinas@arm.com>,
"Will Deacon" <will.deacon@arm.com>,
"HongZhou Yang" <hongzhou.yang@mediatek.com>,
"Sascha Hauer" <s.hauer@pengutronix.de>,
"devicetree@vger.kernel.org" <devicetree@vger.kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"linux-arm-kernel@lists.infradead.org\" "
<linux-arm-kernel@lists.infradead.org>,
"linux-spi@vger.kernel.org" <linux-spi@vger.kernel.org>,
"linux-mediatek@lists.infradead.org\" "
<linux-mediatek@lists.infradead.org>,
srv_heupstream <srv_heupstream@mediatek.com>
Subject: Re: [PATCH 2/3] spi: mediatek: Add spi bus for Mediatek MT8173
Date: Wed, 17 Jun 2015 18:10:13 +0200 [thread overview]
Message-ID: <20150617181013.2688d08f@north> (raw)
In-Reply-To: <1434550251.23617.38.camel@mtksdaap41>
On Wed, 17 Jun 2015 22:10:51 +0800, Eddie Huang wrote:
> If tx scatterlist per list data size are 128, 4096, 256. rx scatterlist
> per list data size are 128, 4096, 256. So we need to go through above
> steps three times. If tx scatterlists per list data size are 128, 4096,
> 256. rx scatterlists per list data size are 256, 4096, 128. If we start
> sending first entry, tx size is 128, rx size is 256, this will cause
> hardware malfunction because tx, rx data length are not the same.
You can just use min(next_rx_len, next_tx_len) as transfer size.
Am I missing something? For your 128, 4096, 256 vs 256, 4096, 128
example you could do: 128, 128, 3968, 128, 128.
next prev parent reply other threads:[~2015-06-17 16:10 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-05-08 8:55 Add Mediatek SPI driver leilk.liu-NuS5LvNUpcJWk0Htik3J/w
2015-05-08 8:55 ` [PATCH 2/3] spi: mediatek: Add spi bus for Mediatek MT8173 leilk.liu
[not found] ` <1431075343-7887-3-git-send-email-leilk.liu-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org>
2015-05-08 17:53 ` Mark Brown
2015-05-12 12:39 ` leilk liu
2015-05-12 16:05 ` Mark Brown
[not found] ` <20150512160540.GB3066-GFdadSzt00ze9xe1eoZjHA@public.gmane.org>
2015-05-13 9:26 ` Yingjoe Chen
2015-05-13 11:10 ` Mark Brown
2015-05-13 13:58 ` Yingjoe Chen
2015-05-15 7:38 ` leilk liu
2015-05-15 9:25 ` Mark Brown
[not found] ` <20150515092543.GY2761-GFdadSzt00ze9xe1eoZjHA@public.gmane.org>
2015-06-08 10:15 ` Eddie Huang
2015-06-08 17:59 ` Mark Brown
[not found] ` <20150608175927.GO14071-GFdadSzt00ze9xe1eoZjHA@public.gmane.org>
2015-06-09 10:05 ` Eddie Huang
2015-06-09 10:39 ` Mark Brown
[not found] ` <20150609103951.GA14071-GFdadSzt00ze9xe1eoZjHA@public.gmane.org>
2015-06-10 8:06 ` Eddie Huang
2015-06-17 9:08 ` Eddie Huang
2015-06-17 12:47 ` Mark Brown
[not found] ` <20150617124758.GE3214-GFdadSzt00ze9xe1eoZjHA@public.gmane.org>
2015-06-17 14:10 ` Eddie Huang
2015-06-17 16:10 ` Jakub Kiciński [this message]
2015-06-17 16:35 ` Mark Brown
[not found] ` <20150617163531.GU14071-GFdadSzt00ze9xe1eoZjHA@public.gmane.org>
2015-06-18 8:11 ` Eddie Huang
[not found] ` <1431075343-7887-1-git-send-email-leilk.liu-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org>
2015-05-08 8:55 ` [PATCH 1/3] dt-bindings: ARM: Mediatek: Document devicetree bindings for spi bus leilk.liu-NuS5LvNUpcJWk0Htik3J/w
2015-05-08 8:55 ` [PATCH 3/3] arm64: dts: Add spi bus dts leilk.liu-NuS5LvNUpcJWk0Htik3J/w
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