Re: [PATCH 2/4] dt-bindings: display: bcm2835-v3d: Add an optional reset line

[Florian Fainelli <florian.fainelli@broadcom.com>]

On 8/18/26 03:35, Maíra Canal wrote:
> Hi Krzysztof,
> 
> On 18/08/26 06:05, Krzysztof Kozlowski wrote:
>> On Sun, Aug 16, 2026 at 11:05:41AM -0300, Maíra Canal wrote:
>>> The BCM2835 PM block has exposed a reset line for the V3D block since
>>> commit 670c672608a1 ("soc: bcm: bcm2835-pm: Add support for power 
>>> domains
>>
>> This is a reset provider driver, so not really relevant here. Driver
>> commit would be relevant if it was about consumer who implemented
>> undocumented ABI. I suggest to drop reference to driver and instead
>> describe the hardware.
> 
> Ack.
> 
>>
>>> under a new binding."), which allows the GPU to be reset without
>>> power-cycling its domain. Document it so that the vc4 driver can use 
>>> it to
>>> recover from a GPU hang.
>>
>> Does every device have it? Cygnus as well?
> 
> I'm not familiar to the Cygnus hardware, only Raspberry Pi, so I'd
> appreciate if one of the folks from Broadcom could help us with this
> information.
> 
> However, just like the power domain, I added this property as optional
> to accommodate the fact that the current Cygnus DT doesn't expose any
> power domain or reset controller.

I really don't know and have no visibility into these older chips, let's 
assume they don't.
-- 
Florian