Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
MIME-Version: 1.0
In-Reply-To: <20180416153501.GQ6014@localhost>
References: <CAMz4kuJyKNNuR9WGP8F1NKAET6ZTtN4LtXTTtdnR3Zyxa+OjNw@mail.gmail.com>
 <20180412093735.GF6014@localhost> <CAMz4ku+i+zA0_5U65vc3h3tO-hzWvtCOFDeFU94h3Rm6sJUuKQ@mail.gmail.com>
 <CAMz4ku+EUtk2phRGkxkW6YwUvBLb-O7tmMoucvVEQZbL9EY8Zg@mail.gmail.com>
 <20180413034332.GI6014@localhost> <CAMz4kuL_i7u5OCXrtJy92=OisOzgbWk_e-S9dSuBRPenX=ScPA@mail.gmail.com>
 <20180413063641.GL6014@localhost> <CAMz4ku+dLk2Gi_20ATW5o-MPvpy-2iF_YJCwyStaH8xPNXSE7Q@mail.gmail.com>
 <20180416035831.GO6014@localhost> <CAMz4kuKbPZkJBF1ci5osntnHHD2nkm1d81=2GQohzc3KGn-wiw@mail.gmail.com>
 <20180416153501.GQ6014@localhost>
From:   Baolin Wang <baolin.wang@linaro.org>
Date:   Tue, 17 Apr 2018 14:06:54 +0800
Message-ID: <CAMz4ku+uru+53BR9JaqQQ+ik30-8o5By-Ai2jA_g-MYF0iKpCA@mail.gmail.com>
Subject: Re: [PATCH 4/5] dmaengine: sprd: Add Spreadtrum DMA configuration
To:     Vinod Koul <vinod.koul@intel.com>
Cc:     Dan Williams <dan.j.williams@intel.com>,
        Eric Long <eric.long@spreadtrum.com>,
        Mark Brown <broonie@kernel.org>, dmaengine@vger.kernel.org,
        LKML <linux-kernel@vger.kernel.org>
Content-Type: text/plain; charset="UTF-8"
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

On 16 April 2018 at 23:35, Vinod Koul <vinod.koul@intel.com> wrote:
> On Mon, Apr 16, 2018 at 02:32:05PM +0800, Baolin Wang wrote:
>
>> >> Beside the general configuration, our audio driver will configure the
>> >> fragment length, block length, maybe transaction length, and they must
>> >> specify the request type and interrupt type, these are what we want to
>> >> export for users.
>> >
>> > As I said before, you need to derive fragment, block or transaction from
>>
>> I am sorry I did not make things clear here. What I mean is not only
>> link list mode(prep_cyclic), but also other modes (prep_slave,
>> prep_interleaved ...), users still need to configure the fragment
>> length, block length or transaction length according to their
>> requirements.
>
> Other modes are similar, they also use the parameters programmed from
> dma_slave_config. Pls see other driver examples. IIRC dw dma has
> similar capabilities but not all are exposed to user and driver configures.

I'll check the dw dma. Really thanks for your help :)

-- 
Baolin.wang
Best Regards