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Re: [RFC PATCH 2/3] mmc: host: omap_hsmmc: Enable ADMA2

From Tony Lindgren <tony@atomide.com>
Newsgroups linux.kernel
Subject Re: [RFC PATCH 2/3] mmc: host: omap_hsmmc: Enable ADMA2
Date 2016-05-19 17:00 +0200
Message-ID <rAxAC-16l-11@gated-at.bofh.it> (permalink)
References <rA5l0-87e-5@gated-at.bofh.it> <rA5l0-87e-27@gated-at.bofh.it> <rA6TN-Pd-67@gated-at.bofh.it> <rAfu1-6iT-19@gated-at.bofh.it> <rArbU-5AA-7@gated-at.bofh.it>
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* Peter Ujfalusi <peter.ujfalusi@ti.com> [160519 01:10]:
> On 05/18/2016 10:30 PM, Tony Lindgren wrote:
> > Ideally the adma support would be a separate loadable module,
> > similar how the cppi41dma is a child of the OTG controller.
> 
> The Master DMA is part of the hsmmc IP block. If the same ADMA module is
> present on other IPs it might be beneficial to have a helper library to handle
> it (allocating the descriptor pool, wrinting, updating descriptors, etc).

OK. Yeah if it's part of the MMC controller it makes no sense to
separate it. So then the conecrns are using alternate DMA
implementations and keeping PM runtime working :)

BTW, Felipe mentioned that the best thing to do in the long run would
be to set up sdhci-omap.c operating in ADMA mode.

Felipe, care to summarize what you had in mind?

Regards,

Tony

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Thread

[RFC PATCH 0/3] dra7/omap4/omap5: Enable ADMA2 Kishon Vijay Abraham I <kishon@ti.com> - 2016-05-18 10:50 +0200
  [RFC PATCH 1/3] mmc: host: omap_hsmmc: remove *use_dma* member Kishon Vijay Abraham I <kishon@ti.com> - 2016-05-18 10:50 +0200
  [RFC PATCH 3/3] ARM: dts: dra7/omap4/omap5: Enable ADMA2 Kishon Vijay Abraham I <kishon@ti.com> - 2016-05-18 10:50 +0200
  [RFC PATCH 2/3] mmc: host: omap_hsmmc: Enable ADMA2 Kishon Vijay Abraham I <kishon@ti.com> - 2016-05-18 10:50 +0200
    Re: [RFC PATCH 2/3] mmc: host: omap_hsmmc: Enable ADMA2 Peter Ujfalusi <peter.ujfalusi@ti.com> - 2016-05-18 12:30 +0200
      Re: [RFC PATCH 2/3] mmc: host: omap_hsmmc: Enable ADMA2 Tony Lindgren <tony@atomide.com> - 2016-05-18 21:40 +0200
        Re: [RFC PATCH 2/3] mmc: host: omap_hsmmc: Enable ADMA2 Kishon Vijay Abraham I <kishon@ti.com> - 2016-05-19 08:20 +0200
        Re: [RFC PATCH 2/3] mmc: host: omap_hsmmc: Enable ADMA2 Peter Ujfalusi <peter.ujfalusi@ti.com> - 2016-05-19 10:10 +0200
          Re: [RFC PATCH 2/3] mmc: host: omap_hsmmc: Enable ADMA2 Tony Lindgren <tony@atomide.com> - 2016-05-19 17:00 +0200
            Re: [RFC PATCH 2/3] mmc: host: omap_hsmmc: Enable ADMA2 Felipe Balbi <balbi@kernel.org> - 2016-05-19 20:40 +0200
              Re: [RFC PATCH 2/3] mmc: host: omap_hsmmc: Enable ADMA2 Kishon Vijay Abraham I <kishon@ti.com> - 2016-05-23 08:30 +0200
                Re: [RFC PATCH 2/3] mmc: host: omap_hsmmc: Enable ADMA2 Felipe Balbi <balbi@kernel.org> - 2016-05-23 09:20 +0200
                Re: [RFC PATCH 2/3] mmc: host: omap_hsmmc: Enable ADMA2 Kishon Vijay Abraham I <kishon@ti.com> - 2016-05-23 10:10 +0200
      Re: [RFC PATCH 2/3] mmc: host: omap_hsmmc: Enable ADMA2 Kishon Vijay Abraham I <kishon@ti.com> - 2016-05-19 08:10 +0200
        Re: [RFC PATCH 2/3] mmc: host: omap_hsmmc: Enable ADMA2 Peter Ujfalusi <peter.ujfalusi@ti.com> - 2016-05-19 10:10 +0200
    Re: [RFC PATCH 2/3] mmc: host: omap_hsmmc: Enable ADMA2 Peter Ujfalusi <peter.ujfalusi@ti.com> - 2016-05-18 13:10 +0200
    Re: [RFC PATCH 2/3] mmc: host: omap_hsmmc: Enable ADMA2 Peter Ujfalusi <peter.ujfalusi@ti.com> - 2016-05-19 10:30 +0200

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