public inbox for linux-kernel@vger.kernel.org
 help / color / mirror / Atom feed
From: Russell King - ARM Linux <linux@arm.linux.org.uk>
To: Peter Ujfalusi <peter.ujfalusi@ti.com>
Cc: Vinod Koul <vinod.koul@intel.com>, Dan Williams <djbw@fb.com>,
	Tony Lindgren <tony@atomide.com>,
	linux-kernel@vger.kernel.org, Felipe Balbi <balbi@ti.com>,
	Santosh Shilimkar <santosh.shilimkar@ti.com>,
	linux-arm-kernel@lists.infradead.org, linux-omap@vger.kernel.org,
	Jarkko Nikula <jarkko.nikula@bitmer.com>
Subject: Re: [RFC] dmaengine: omap-dma: Start DMA without delay
Date: Fri, 29 Mar 2013 17:31:00 +0000	[thread overview]
Message-ID: <20130329173100.GV30923@n2100.arm.linux.org.uk> (raw)
In-Reply-To: <1364566323-24144-1-git-send-email-peter.ujfalusi@ti.com>

On Fri, Mar 29, 2013 at 03:12:03PM +0100, Peter Ujfalusi wrote:
> Remove the use of a tasklet to start the DMA channel when issue_pending is
> called.
> The use of tasklet delays the DMA start which can cause issues at drivers,
> for example the audio drivers expect that the DMA is started right away.
> 
> Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
> ---
> Hi Russell,
> 
> I know you are against removing the tasklet since you have planed to move the
> omap-dma to use runtime/dynamic DMA channel use.
> I have looked at the amba-pl08x.c driver which is doing that exactly (as you
> pointed out that to me). AMBA did not use tasklet either and I'm sure we can
> change the omap-dma driver to do the same in a same way as we could have done it
> with the tasklet use.

It's rather sad that you're ignoring what I'm saying, and going by what
another DMA engine driver - which is self contained - is doing, rather
than listening to my arguments against that approach.

I think in return I'll just ignore this patch, showing you the same
respect you show me.  Congratuations.

  parent reply	other threads:[~2013-03-29 17:31 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-03-29 14:12 [RFC] dmaengine: omap-dma: Start DMA without delay Peter Ujfalusi
2013-03-29 14:36 ` Peter Meerwald
2013-03-29 17:31 ` Russell King - ARM Linux [this message]
2013-04-02  8:14   ` Peter Ujfalusi

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20130329173100.GV30923@n2100.arm.linux.org.uk \
    --to=linux@arm.linux.org.uk \
    --cc=balbi@ti.com \
    --cc=djbw@fb.com \
    --cc=jarkko.nikula@bitmer.com \
    --cc=linux-arm-kernel@lists.infradead.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-omap@vger.kernel.org \
    --cc=peter.ujfalusi@ti.com \
    --cc=santosh.shilimkar@ti.com \
    --cc=tony@atomide.com \
    --cc=vinod.koul@intel.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox