Re: [PATCH v4 0/5] Add Qualcomm JPEG V4L2 encoder for SM8250

[Bryan O'Donoghue <bryan.odonoghue@linaro.org>]

On 06/07/2026 15:35, Vladimir Zapolskiy wrote:
>> omitting power-domains for individual nodes is incorrect. Best practice
>> and in fact the _only_ practice that can work is to list power-domains,
> 
> Let's step back and discuss hardware description of CAMSS IPs, so far
> there is no point to jump to the practice.
> 
>> interconnects in the individual nodes themselves as - I've pointed out
>> multiple times now - those blocks have to ramp clocks and scale voltages
>> dependent on their particular use cases.
>>
> 
> Right, you've pointed it a few times, no surprise a straw man fallacy
> argument resembles as is, because it does not address or debate the
> initial point of concern [1], when the absolutely excessive complexity
> is proposed to be implemented for "CAMSS power island" and its IPs.
> 
> [1] https://lore.kernel.org/linux-media/e04cb9dc-76dd-4fa8-92f4- 
> be002bf7ee8b@linaro.org

You seem a little stuck on the term "CAMSS power island" the individual 
blocks within the CAMSS "island" are individually collapsible.

That is why they _must_ have their own power-domains.

The CamNoc is shared between these components but not outside. Hence it 
is more like a bus than a parent/child relationship.

As to your argument about complexity. I think that's subjective.

---
bod