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From: Vinod Koul <vkoul@kernel.org>
To: Sameer Pujar <spujar@nvidia.com>, Peter Ujfalusi <peter.ujfalusi@ti.com>
Cc: dan.j.williams@intel.com, tiwai@suse.com, jonathanh@nvidia.com,
	dmaengine@vger.kernel.org, linux-kernel@vger.kernel.org,
	sharadg@nvidia.com, rlokhande@nvidia.com, dramesh@nvidia.com,
	mkumard@nvidia.com
Subject: Re: [PATCH] [RFC] dmaengine: add fifo_size member
Date: Fri, 19 Jul 2019 10:34:59 +0530
Message-ID: <20190719050459.GM12733@vkoul-mobl.Dlink> (raw)
In-Reply-To: <75be49ac-8461-0798-b673-431ec527d74f@nvidia.com>

On 05-07-19, 11:45, Sameer Pujar wrote:
> Hi Vinod,
> 
> What are your final thoughts regarding this?

Hi sameer,

Sorry for the delay in replying

On this, I am inclined to think that dma driver should not be involved.
The ADMAIF needs this configuration and we should take the path of
dma_router for this piece and add features like this to it

> 
> Thanks,
> Sameer.
> 
> > > Where does ADMAIF driver reside in kernel, who configures it for normal
> > > dma txns..?
> > Not yet, we are in the process of upstreaming ADMAIF driver.
> > To describe briefly, audio subsystem is using ALSA SoC(ASoC) layer.
> > ADMAIF is
> > registered as platform driver and exports DMA functionality. It
> > registers PCM
> > devices for each Rx/Tx ADMAIF channel. During PCM playback/capture
> > operations,
> > ALSA callbacks configure DMA channel using API dmaengine_slave_config().
> > RFC patch proposed, is to help populate FIFO_SIZE value as well during
> > above
> > call, since ADMA requires it.
> > > 
> > > Also it wold have helped the long discussion if that part was made clear
> > > rather than talking about peripheral all this time :(
> > Thought it was clear, though should have avoided using 'peripheral' in
> > the
> > discussions. Sorry for the confusion.

-- 
~Vinod

  parent reply index

Thread overview: 60+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-04-30 11:30 Sameer Pujar
2019-04-30 11:30 ` [PATCH] " Sameer Pujar
2019-05-02  6:04 ` Vinod Koul
2019-05-02  6:04   ` [PATCH] " Vinod Koul
2019-05-02 10:53   ` Sameer Pujar
2019-05-02 12:25     ` Vinod Koul
2019-05-02 13:29       ` Sameer Pujar
2019-05-03 19:10         ` Peter Ujfalusi
2019-05-04 10:23         ` Vinod Koul
2019-05-06 13:04           ` Sameer Pujar
2019-05-06 15:50             ` Vinod Koul
2019-06-06  3:49               ` Sameer Pujar
2019-06-06  6:00                 ` Peter Ujfalusi
2019-06-06  6:41                   ` Sameer Pujar
2019-06-06  7:14                     ` Jon Hunter
2019-06-06 10:22                       ` Peter Ujfalusi
2019-06-06 10:49                         ` Jon Hunter
2019-06-06 11:54                           ` Peter Ujfalusi
2019-06-06 12:37                             ` Jon Hunter
2019-06-06 13:45                               ` Dmitry Osipenko
2019-06-06 13:55                                 ` Dmitry Osipenko
2019-06-06 14:26                                   ` Jon Hunter
2019-06-06 14:36                                     ` Jon Hunter
2019-06-06 14:36                                     ` Dmitry Osipenko
2019-06-06 14:47                                       ` Jon Hunter
2019-06-06 14:25                                 ` Jon Hunter
2019-06-06 15:18                                   ` Dmitry Osipenko
2019-06-06 16:32                                     ` Jon Hunter
2019-06-06 16:44                                       ` Dmitry Osipenko
2019-06-06 16:53                                         ` Jon Hunter
2019-06-06 17:25                                           ` Dmitry Osipenko
2019-06-06 17:56                                             ` Dmitry Osipenko
2019-06-07  9:24                                             ` Jon Hunter
2019-06-07  5:50                               ` Peter Ujfalusi
2019-06-07  9:18                                 ` Jon Hunter
2019-06-07 10:27                                   ` Jon Hunter
2019-06-07 12:17                                     ` Peter Ujfalusi
2019-06-07 12:58                                       ` Jon Hunter
2019-06-07 13:35                                         ` Peter Ujfalusi
2019-06-07 20:53                                           ` Dmitry Osipenko
2019-06-10  8:01                                             ` Jon Hunter
2019-06-10  7:59                                           ` Jon Hunter
2019-06-13  4:43                 ` Vinod Koul
2019-06-17  7:07                   ` Sameer Pujar
2019-06-18  4:33                     ` Vinod Koul
2019-06-20 10:29                       ` Sameer Pujar
2019-06-24  6:26                         ` Vinod Koul
2019-06-25  2:57                           ` Sameer Pujar
2019-07-05  6:15                             ` Sameer Pujar
2019-07-15 15:42                               ` Sameer Pujar
2019-07-19  5:04                               ` Vinod Koul [this message]
2019-07-23  5:54                                 ` Sameer Pujar
2019-07-29  6:10                                   ` Vinod Koul
2019-07-31  9:48                                     ` Jon Hunter
2019-07-31 15:16                                       ` Vinod Koul
2019-08-02  8:51                                         ` Jon Hunter
2019-08-08 12:38                                           ` Vinod Koul
2019-08-19 15:56                                             ` Jon Hunter
2019-08-20 11:05                                               ` Vinod Koul
2019-09-16  9:02                                                 ` Sameer Pujar

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