Re: [PATCH v5] dma: qcom: bam_dma: Fix command element mask field for BAM v1.6.0+

[Varadarajan Narayanan]

On Tue, May 19, 2026 at 11:01:51PM +0530, Vinod Koul wrote:
> On 14-05-26, 12:09, Varadarajan Narayanan wrote:
> > From: Md Sadre Alam <md.alam@xxxxxxxxxxxxxxxx>
> >
> > BAM version 1.6.0 and later changed the behavior of the mask field in
> > command elements for read operations. In newer BAM versions, the mask
> > field for read commands contains the upper 4 bits of the destination
> > address to support 36-bit addressing, while for write commands it
> > continues to function as a traditional write mask.
>
> But this changes behaviour for all versions. What happens to folks on older
> versions, wont this break for them, if not what am I missing

Md Alam,

Can you please respond to Vinod's query.

-Varada

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