linux-kernel - Re: [PATCH 0/8 v2] k3dma patches to add support for hi3660/HiKey960

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Date:   Fri, 4 Jan 2019 20:28:48 -0800
From:   John Stultz <john.stultz@...aro.org>
To:     Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
Cc:     lkml <linux-kernel@...r.kernel.org>,
        Tanglei Han <hantanglei@...wei.com>,
        Zhuangluan Su <suzhuangluan@...ilicon.com>,
        Dan Williams <dan.j.williams@...el.com>,
        Vinod Koul <vkoul@...nel.org>, Wei Xu <xuwei5@...ilicon.com>,
        Mark Rutland <mark.rutland@....com>,
        Rob Herring <robh+dt@...nel.org>,
        Guodong Xu <guodong.xu@...aro.org>,
        Ryan Grachek <ryan@...ted.us>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>, dmaengine@...r.kernel.org,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH 0/8 v2] k3dma patches to add support for hi3660/HiKey960

On Fri, Jan 4, 2019 at 7:37 PM Manivannan Sadhasivam
<manivannan.sadhasivam@...aro.org> wrote:
>
> Hi John,
>
> On Fri, Jan 04, 2019 at 12:56:20PM -0800, John Stultz wrote:
> > This patch series is based on recent work by Tanglei Han, and
> > adds support for hi3660 SoCs as found on the HiKey960 board,
>
> Not sure about the description/subject here! This patchset adds support
> for ASP DMAC found in HI3660 SoCs, Peripheral DMAC is already supported.
>

So yes, it does enable ASP DMAC support, but the full set also enables
the Peripheral DMAC as well in a few ways:
* Avoiding setting the AXI register, which is configured differently on hi3660.
* By adding support for the dma-avail-chan (so we don't try to use
reserved channels)

thanks
-john