linux-kernel - Re: [PATCH v2] dmaengine: sun6i: Set the maximum segment size

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Message-ID: <Y8fhFCUzYPwu3Y+m@matsya>
Date:   Wed, 18 Jan 2023 17:37:48 +0530
From:   Vinod Koul <vkoul@...nel.org>
To:     Samuel Holland <samuel@...lland.org>
Cc:     Jernej Skrabec <jernej.skrabec@...il.com>,
        Chen-Yu Tsai <wens@...e.org>, dmaengine@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-sunxi@...ts.linux.dev
Subject: Re: [PATCH v2] dmaengine: sun6i: Set the maximum segment size

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