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From: Mark Brown <broonie@kernel.org>
To: Andy Shevchenko <andy.shevchenko@gmail.com>
Cc: Serge Semin <Sergey.Semin@baikalelectronics.ru>,
	Serge Semin <fancer.lancer@gmail.com>,
	Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
	Vinod Koul <vkoul@kernel.org>, Viresh Kumar <vireshk@kernel.org>,
	Dan Williams <dan.j.williams@intel.com>,
	Alexey Malahov <Alexey.Malahov@baikalelectronics.ru>,
	Thomas Bogendoerfer <tsbogend@alpha.franken.de>,
	Paul Burton <paulburton@kernel.org>,
	Ralf Baechle <ralf@linux-mips.org>, Arnd Bergmann <arnd@arndb.de>,
	Rob Herring <robh+dt@kernel.org>,
	linux-mips@vger.kernel.org,
	devicetree <devicetree@vger.kernel.org>,
	dmaengine <dmaengine@vger.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH v2 4/6] dmaengine: dw: Print warning if multi-block is unsupported
Date: Mon, 11 May 2020 18:48:00 +0100	[thread overview]
Message-ID: <20200511174800.GM8216@sirena.org.uk> (raw)
In-Reply-To: <CAHp75VdOi1rwaKjzowhj0KA-eNNL4NxpiCeqfELFgO_RcnZ-xw@mail.gmail.com>

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On Mon, May 11, 2020 at 04:58:53PM +0300, Andy Shevchenko wrote:
> On Mon, May 11, 2020 at 4:48 PM Serge Semin

> > So the question is of how to export the multi-block LLP flag from DW DMAc
> > driver. Andy?

> I'm not sure I understand why do you need this being exported. Just
> always supply SG list out of single entry and define the length
> according to the maximum segment size (it's done IIRC in SPI core).

If there's a limit from the dmaengine it'd be a bit cleaner to export
the limit from the DMA engine (and it'd help with code reuse for clients
that might work with other DMA controllers without needing to add custom
compatibles for those instantiations).

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  reply	other threads:[~2020-05-11 17:48 UTC|newest]

Thread overview: 72+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-03-06 13:10 [PATCH 0/5] dmaengine: dw: Take Baikal-T1 SoC DW DMAC peculiarities into account Sergey.Semin
2020-03-06 13:29 ` Andy Shevchenko
2020-03-06 13:30   ` Andy Shevchenko
2020-03-06 13:43     ` Vinod Koul
     [not found]     ` <20200306135050.40094803087C@mail.baikalelectronics.ru>
2020-03-09 21:45       ` Sergey Semin
     [not found]   ` <20200306133756.0F74C8030793@mail.baikalelectronics.ru>
2020-03-06 13:47     ` Sergey Semin
2020-03-06 14:11       ` Andy Shevchenko
     [not found]       ` <20200306141135.9C4F380307C2@mail.baikalelectronics.ru>
2020-03-09 22:08         ` Sergey Semin
2020-05-08 10:52 ` [PATCH v2 0/6] " Serge Semin
2020-05-08 10:52   ` [PATCH v2 1/6] dt-bindings: dma: dw: Convert DW DMAC to DT binding Serge Semin
2020-05-18 17:50     ` Rob Herring
2020-05-08 10:53   ` [PATCH v2 2/6] dt-bindings: dma: dw: Add max burst transaction length property Serge Semin
2020-05-08 11:12     ` Andy Shevchenko
2020-05-11 20:05       ` Serge Semin
2020-05-11 21:01         ` Andy Shevchenko
2020-05-11 21:35           ` Serge Semin
2020-05-12  9:08             ` Andy Shevchenko
2020-05-12 11:49               ` Serge Semin
2020-05-12 12:38                 ` Andy Shevchenko
2020-05-15  6:09                   ` Vinod Koul
2020-05-15 10:51                     ` Andy Shevchenko
2020-05-15 10:56                       ` Vinod Koul
2020-05-15 11:11                         ` Serge Semin
2020-05-17 17:47                           ` Serge Semin
2020-05-18 17:30                             ` Rob Herring
2020-05-18 19:30                               ` Serge Semin
2020-05-19 17:13                             ` Vinod Koul
2020-05-21  1:33                               ` Serge Semin
2020-05-08 10:53   ` [PATCH v2 3/6] dmaengine: dw: Set DMA device max segment size parameter Serge Semin
2020-05-08 11:21     ` Andy Shevchenko
2020-05-08 18:49       ` Vineet Gupta
2020-05-11 21:16       ` Serge Semin
2020-05-12 12:35         ` Andy Shevchenko
2020-05-12 17:01           ` Serge Semin
2020-05-15  6:16           ` Vinod Koul
2020-05-15 10:53             ` Andy Shevchenko
2020-05-17 18:22               ` Serge Semin
2020-05-08 10:53   ` [PATCH v2 4/6] dmaengine: dw: Print warning if multi-block is unsupported Serge Semin
2020-05-08 11:26     ` Andy Shevchenko
2020-05-08 11:53       ` Mark Brown
2020-05-08 19:06         ` Andy Shevchenko
2020-05-11  3:13           ` Serge Semin
2020-05-11 14:03             ` Andy Shevchenko
2020-05-11  2:10         ` Serge Semin
2020-05-11 11:58           ` Mark Brown
2020-05-11 13:45             ` Serge Semin
2020-05-11 13:58               ` Andy Shevchenko
2020-05-11 17:48                 ` Mark Brown [this message]
2020-05-11 18:25                   ` Serge Semin
2020-05-11 19:32                 ` Serge Semin
2020-05-11 21:07                   ` Andy Shevchenko
2020-05-11 21:08                     ` Andy Shevchenko
2020-05-12 12:42                       ` Serge Semin
2020-05-15  6:30                         ` Vinod Koul
2020-05-17 19:23                           ` Serge Semin
2020-05-19 17:02                             ` Vinod Koul
2020-05-21  1:40                               ` Serge Semin
2020-05-11 17:44               ` Mark Brown
2020-05-11 18:32                 ` Serge Semin
2020-05-11 21:32                   ` Mark Brown
2020-05-08 10:53   ` [PATCH v2 5/6] dmaengine: dw: Introduce max burst length hw config Serge Semin
2020-05-08 11:41     ` Andy Shevchenko
2020-05-12 14:08       ` Serge Semin
2020-05-12 19:12         ` Andy Shevchenko
2020-05-12 19:47           ` Serge Semin
2020-05-15 11:02             ` Andy Shevchenko
2020-05-15  6:39           ` Vinod Koul
2020-05-17 19:38             ` Serge Semin
2020-05-19 17:07               ` Vinod Koul
2020-05-21  1:47                 ` Serge Semin
2020-05-08 10:53   ` [PATCH v2 6/6] dmaengine: dw: Take HC_LLP flag into account for noLLP auto-config Serge Semin
2020-05-08 11:43     ` Andy Shevchenko

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