linux-kernel - Re: [PATCH 1/2] dt-bindings: dma: ti: k3-udma: Update for atype support (virtualization)

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Message-ID: <20200226152123.GA25719@bogus>
Date:   Wed, 26 Feb 2020 09:21:23 -0600
From:   Rob Herring <robh@...nel.org>
To:     Peter Ujfalusi <peter.ujfalusi@...com>
Cc:     vkoul@...nel.org, robh+dt@...nel.org, mark.rutland@....com,
        dmaengine@...r.kernel.org, linux-kernel@...r.kernel.org,
        dan.j.williams@...el.com, grygorii.strashko@...com,
        devicetree@...r.kernel.org
Subject: Re: [PATCH 1/2] dt-bindings: dma: ti: k3-udma: Update for atype
 support (virtualization)

On Tue, 18 Feb 2020 16:31:25 +0200, Peter Ujfalusi wrote:
> In UDMA each channel can use different ATYPE value which tells UDMA how
> the addresses in the descriptors should be treated:
> 0: pointers are physical addresses (no translation)
> 1: pointers are intermediate addresses (PVU)
> 2: pointers are virtual addresses (SMMU)
> 
> When virtualized environment is used then the dma binding should use
> additional cell to configure the desired ATYPE for the channel.
> 
> Signed-off-by: Peter Ujfalusi <peter.ujfalusi@...com>
> ---
>  .../devicetree/bindings/dma/ti/k3-udma.yaml   | 19 ++++++++++++++++++-
>  1 file changed, 18 insertions(+), 1 deletion(-)
> 

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