Re: [PATCH v2 1/5] dt-bindings: display: simple-framebuffer: Add interconnects property

[Krzysztof Kozlowski <krzk@kernel.org>]

On 03/07/2025 11:41, Maxime Ripard wrote:
>>> But does that work with *any* device that requires interconnects? The next such simple-framebuffer device should work out of the box *without* the kernel knowing anything about it. That's one of the key features of the simple-framebuffer.  If we have to maintainer per-device feature sets, it breaks that assumption.
>>
>> The driver code for this can still be generic and since the driver
>> will bind to the fallback plain "simple-framebuffer" compatible
>> this should also work for new platforms.
>>
>> The e.g. "qcom.simple-framebuffer-sm8650-mdss" compatible would
>> purely be something in the dt-bindings to document which simplefb
>> implementations will have interconnects and which ones will not.
>>
>> The driver does not necessarily need to check these more
>> precise compatibles, it can still just check for the generic
>> presence of interconnects.
> 
> This ship has kind of sailed though. This binding has been used by
> plenty of firmwares and bootloaders over the years, and has been
> deployed on plenty of devices already.
> 
> Good luck fixing it in all of them, and then updating every device.
No one suggested that... We speak about new devices, although maybe this
one SM7635 new device runs plenty of firmwares and bootloaders?

Best regards,
Krzysztof