linux-kernel - Re: [RFC v2 PATCH 2/7] dt-bindings: dmaengine: xilinx

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Message-ID: <20210412182529.GA4155955@robh.at.kernel.org>
Date:   Mon, 12 Apr 2021 13:25:29 -0500
From:   Rob Herring <robh@...nel.org>
To:     Radhey Shyam Pandey <radhey.shyam.pandey@...inx.com>
Cc:     linux-arm-kernel@...ts.infradead.org, git@...inx.com,
        vkoul@...nel.org, michal.simek@...inx.com, robh+dt@...nel.org,
        linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
        dmaengine@...r.kernel.org
Subject: Re: [RFC v2 PATCH 2/7] dt-bindings: dmaengine: xilinx_dma: Add
 xlnx,irq-delay property

On Fri, 09 Apr 2021 23:26:00 +0530, Radhey Shyam Pandey wrote:
> Add an optional AXI DMA property 'xlnx,irq-delay'. It specifies interrupt
> timeout value and causes the DMA engine to generate an interrupt after the
> delay time period has expired. Timer begins counting at the end of a packet
> and resets with receipt of a new packet or a timeout event occurs.
> 
> This property is useful when AXI DMA is connected to the streaming IP i.e
> axiethernet where inter packet latency is critical while still taking the
> benefit of interrupt coalescing.
> 
> Signed-off-by: Radhey Shyam Pandey <radhey.shyam.pandey@...inx.com>
> ---
> Changes for v2:
> - New patch. Introduce xlnx,irq-delay property for low latency usecases
> ---
>  Documentation/devicetree/bindings/dma/xilinx/xilinx_dma.txt | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
> 

Acked-by: Rob Herring <robh@...nel.org>