Re: [PATCH 0/2] Add MDSP carveout memory-region support for Q6 APM on Shikra

Mark Brown <[email protected]> Sat, 1 Aug 2026 00:14:54 +0100

Newsgroups	org.kernel.vger.linux-sound,org.kernel.vger.linux-arm-msm,org.kernel.vger.linux-devicetree,org.kernel.vger.linux-kernel
Message-ID	<[email protected]>

On Thu, Jun 18, 2026 at 05:05:07PM +0530, Ajay Kumar Nandam wrote:
> Unlike most Qualcomm targets where audio runs on the ADSP, the Shikra
> target runs its audio use cases on the MDSP. The MDSP operates in an S2
> (stage-2) protected/secured memory context, so any buffer shared with
> it must reside in a dedicated carveout that is SCM-assigned to the
> MDSP's VMID before use. Without this assignment the MDSP cannot access
> the buffers and APM communication between APSS and MDSP fails.

> Depends-on: https://lore.kernel.org/all/[email protected]/
> Depends-on: https://lore.kernel.org/all/[email protected]/

Please resend when the dependencies have been applied, I'm spending far
too much time repeatedly checking if any of these things can be applied.

Please include human readable descriptions of things like commits and
issues being discussed in e-mail in your mails, this makes them much
easier for humans to read especially when they have no internet access.
I do frequently catch up on my mail on flights or while otherwise
travelling so this is even more pressing for me than just being about
making things a bit easier to read.

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