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

["Maíra Canal" <mcanal@igalia.com>]

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.

Best regards,
- Maíra

> 
> Best regards,
> Krzysztof
>