linux-kernel - Re: [PATCH] dmaengine: Clarify cyclic transfer residue documentation

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Message-ID: <YlQxGh9Jhzm4ekb7@matsya>
Date:   Mon, 11 Apr 2022 19:16:02 +0530
From:   Vinod Koul <vkoul@...nel.org>
To:     Paul Kocialkowski <paul.kocialkowski@...tlin.com>
Cc:     dmaengine@...r.kernel.org, linux-doc@...r.kernel.org,
        linux-kernel@...r.kernel.org, Jonathan Corbet <corbet@....net>,
        Thomas Petazzoni <thomas.petazzoni@...tlin.com>
Subject: Re: [PATCH] dmaengine: Clarify cyclic transfer residue documentation

On 31-03-22, 15:41, Paul Kocialkowski wrote:
> The current documentation for the residue reported in a cyclic transfer
> case mentions that the reported residue should be relative to the current
> period only. However the definition of DMA_RESIDUE_GRANULARITY_SEGMENT
> specifies that the residue should be updated after each period for
> a cyclic transfer, which is in direct contradiction.
> 
> Moreover the pcm_dmaengine common code uses the residue relative to
> the whole cyclic buffer size, not one period.
> 
> Correct the residue-related documentation to reflect this.

Applied, thanks

-- 
~Vinod