From: Vinod Koul <vkoul@kernel.org>
To: Samuel Holland <samuel@sholland.org>
Cc: Jernej Skrabec <jernej.skrabec@gmail.com>,
Chen-Yu Tsai <wens@csie.org>,
dmaengine@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, linux-sunxi@lists.linux.dev
Subject: Re: [PATCH v2] dmaengine: sun6i: Set the maximum segment size
Date: Wed, 18 Jan 2023 17:37:48 +0530 [thread overview]
Message-ID: <Y8fhFCUzYPwu3Y+m@matsya> (raw)
In-Reply-To: <20230101193605.50285-1-samuel@sholland.org>
On 01-01-23, 13:36, Samuel Holland wrote:
> The sun6i DMA engine supports segment sizes up to 2^25-1 bytes. This is
> explicitly stated in newer SoC documentation (H6, D1), and it is implied
> in older documentation by the 25-bit width of the "bytes left in the
> current segment" register field.
>
> Exposing the real segment size limit (instead of the 64k default)
> reduces the number of SG list segments needed for a transaction.
Applied, thanks
--
~Vinod
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
prev parent reply other threads:[~2023-01-18 12:11 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-01-01 19:36 [PATCH v2] dmaengine: sun6i: Set the maximum segment size Samuel Holland
2023-01-18 12:07 ` 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=Y8fhFCUzYPwu3Y+m@matsya \
--to=vkoul@kernel.org \
--cc=dmaengine@vger.kernel.org \
--cc=jernej.skrabec@gmail.com \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-sunxi@lists.linux.dev \
--cc=samuel@sholland.org \
--cc=wens@csie.org \
/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