Re: [PATCH 3/9] dma: qcom: bam_dma: Fix command element mask field for BAM v1.6.0+

[Konrad Dybcio]

On 9/18/25 11:40 AM, Md Sadre Alam wrote:
> 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.

So the hardware can read from higher addresses but not write to them?

Plus, you didn't explain what the mask register does on BAM <1.6.0.
If it really masks the address, all reads will now point to 0x0

Konrad