Re: [PATCH] mailbox: pcc: export the PCC subspace type

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在 2023/9/18 16:43, Sudeep Holla 写道:
On Fri, Sep 15, 2023 at 03:04:57PM +0800, lihuisong (C) wrote:
在 2023/9/15 0:13, Sudeep Holla 写道:
On Thu, Sep 14, 2023 at 07:57:53PM +0800, Huisong Li wrote:
As stated in APCI spec, the size of the subspace shared memory region may
be different for different types. So it is useful for driver to fill PCC
communication space. But the driver used this PCC channel doesn't know what
is the subspace type of the channel.

So export the PCC subspace type by requesting PCC channel.

I would prefer to avoid this, but please post it with user to get better
understanding of it.
Hi Sudeep,

Thanks for your fast review.
Sorry, I cannot fully understand what you mean. What should I do for it?
Currently, it seems that the subspace type in all drivers used PCC is fixed
and not obtained from their platform.
IMO, PCCT is a best natural way to export it.

OK, but please post the changes in the *driver* you ought to use this channel
type. Your change just allows the drivers to use it but it doesn't contain
any driver making use of it. So please post that change as well to understand
the issue better. It helps in the review.
All right, I will post it ASAP.




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