Re: [PATCH v7 2/4] dmaengine: Forward slave device pointer to of_xlate callback

From	Ulf Hansson <ulf.hansson@linaro.org>
Newsgroups	linux.kernel
Subject	Re: [PATCH v7 2/4] dmaengine: Forward slave device pointer to of_xlate callback
Date	2017-02-09 14:40 +0100
Message-ID	<t8X73-6JS-1@gated-at.bofh.it> (permalink)
References	(2 earlier) <t3sZY-wo-43@gated-at.bofh.it> <t3vEt-2eb-1@gated-at.bofh.it> <t3Tx8-9b-15@gated-at.bofh.it> <t8PVT-21u-1@gated-at.bofh.it> <t8TGa-4xj-17@gated-at.bofh.it>
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>>
>> Yes agreed on that, plus the runtime handling needs to be built in, right
>> now the APIs dont work well with it, we disucssed these during the KS and
>> this goes without saying, patches are welcome :)
>
>
> Okay, so what is the conclusion? Do you want me to do the whole rework of
> dma
> engine core to get this runtime pm patchset for pl330 merged??? Is there any
> roadmap for this rework prepared, so I can at least take a look at the
> amount
> of work needed to be done?
>
> I'm rather new to dma engine framework and I only wanted to fix pl330 driver
> not to block turning off the power domain on Exynos5422/5433 SoCs.

As you probably know, this is a common problem for many dma devices,
slave devices and platforms.

If possible, it would be great if we could avoid a solution that
doesn't force changes to lots of "dma consumer" drivers.

>
> I can also check again if there is any other way to find the slave device in
> alloc_chan_resources, like for example scanning the device tree for
> phandles,
> to avoid changing dmaengine core as this turned out to be too problematic
> before one will do the proper dma engine core rework.
>

Again, thanks for working on this!

Kind regards
Uffe

Thread

Re: [PATCH v7 2/4] dmaengine: Forward slave device pointer to  of_xlate callback Vinod Koul <vinod.koul@intel.com> - 2017-02-09 07:00 +0100
  Re: [PATCH v7 2/4] dmaengine: Forward slave device pointer to of_xlate  callback Marek Szyprowski <m.szyprowski@samsung.com> - 2017-02-09 11:00 +0100
    Re: [PATCH v7 2/4] dmaengine: Forward slave device pointer to  of_xlate callback Ulf Hansson <ulf.hansson@linaro.org> - 2017-02-09 14:40 +0100
      Re: [PATCH v7 2/4] dmaengine: Forward slave device pointer to of_xlate  callback Marek Szyprowski <m.szyprowski@samsung.com> - 2017-02-09 14:40 +0100
    Re: [PATCH v7 2/4] dmaengine: Forward slave device pointer to  of_xlate callback Vinod Koul <vinod.koul@intel.com> - 2017-02-09 17:30 +0100

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