From: Vinod Koul <vkoul@kernel.org>
To: Alexandru Ardelean <alexandru.ardelean@analog.com>
Cc: dmaengine@vger.kernel.org,
Michael Hennerich <michael.hennerich@analog.com>
Subject: Re: [PATCH] dmaengine: axi-dmac: Enable TLAST handling
Date: Tue, 21 May 2019 10:38:50 +0530 [thread overview]
Message-ID: <20190521050850.GV15118@vkoul-mobl> (raw)
In-Reply-To: <20190516094430.16121-1-alexandru.ardelean@analog.com>
On 16-05-19, 12:44, Alexandru Ardelean wrote:
> From: Michael Hennerich <michael.hennerich@analog.com>
>
> The TLAST flag is used by the DMAC HDL controller to signal to the
> controller that the following segment (to be submitted) is the last one (in
> a series of segments).
>
> A receiver DMA (typically another DMAC) can read this parameter (from the
> transfer), and terminate the transfer earlier. A typical use-case for this,
> is when the receiver expects a certain amount of segments, but for some
> reason (e.g. an ADC capture which can have an unknown number of digital
> samples) the number of actual segments is smaller. The receiver would read
> this flag, and then the DMAC would finish.
Applied, thanks
--
~Vinod
prev parent reply other threads:[~2019-05-21 5:08 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-05-16 9:44 [PATCH] dmaengine: axi-dmac: Enable TLAST handling Alexandru Ardelean
2019-05-21 5:08 ` Vinod Koul [this message]
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=20190521050850.GV15118@vkoul-mobl \
--to=vkoul@kernel.org \
--cc=alexandru.ardelean@analog.com \
--cc=dmaengine@vger.kernel.org \
--cc=michael.hennerich@analog.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;
as well as URLs for NNTP newsgroup(s).