Querying monitors for DDC/CI capabilities

[bland328]

The Linux tools dcci-tool (https://github.com/bhuvanchandra/ddcci.git) and ddccontrol (https://github.com/ddccontrol/ddccontrol) both have the ability to query a monitor about its capabilities by sending an 0xf3 command (which they both call DDCCI_COMMAND_CAPS).

Seems like a great ability for ddcctl to have! So logical, in fact, that I can't help but fear there's a technical reason it isn't already in there.

Before I take a stab at it, I'm hoping @kfix or someone else might be able to tell me if it is already known to be unworkable under macOS, in which case I won't waste my time :) Thanks!

[kfix]

I was not aware of that command, and I'm assuming the creator of DDC.c wasn't either (or tried but failed and didn't make a note)

[bland328]

Thanks very much for the response. I'll take a shot at it one of these days.

[kfix]

This seems like a very good idea.

It appears sending unsupported commands could potentially brick a monitor (#89)

[ruslan-ardashev]

Also interested in this feature!

[ssbarnea]

How big is that risk? We do know know that living does incur a certain risk of death, but we still try to do it anyway.