Op5+/HDMI-RX: expose ITC type to v4l2 in synopsys hdmir rx

[benhoff]

Description

This exposes the ITC content type provided by hdmi spec to v4l2. This allows user space applications to query the driver using V4L2_CID_DV_RX_IT_CONTENT_TYPE. This way user applications can see not only if a hdmi is plugged in or not, but also what type of video is being transmitted.

For my use case specifically, I just want to know if the recieved type is no type (V4L2_DV_IT_CONTENT_TYPE_NO_ITC) or literally anything else.

This would let me detect when my main computer's goes to sleep with the hdmi out from the main computer plugged into the OP5+ HDMI in.

Without this patch, there's no way to tell that happened, as for my gpu/hdmi plug, it keeps the hot plug detection pin high the whole time.

How Has This Been Tested?

tested on orange pi 5 plus

Checklist:

• I have performed a self-review of my own code
• My changes generate no new warnings

[amazingfate]

It's better to contact Shreeya Patel <[email protected]> who is the author of the mainline patch to see if this change is upstreamable.

[benhoff]

It's better to contact Shreeya Patel <[email protected]> who is the author of the mainline patch to see if this change is upstreamable.

@amazingfate , I have been emailing her and others on the Collabora team the patchsets that I'm trying to apply to Armbian for this driver.

They have not replied so far. It's only been a day or two, they are probably busy.

I'll keep trying to get this upstreamed.

I'd also like to get this integrated to Armbian if possible as it's the build platform that I'm leveraging for this work.

[rpardini]

Hmm, seems to me this landed to the 6.10 directory after 6.11 was bumped.
Please review and send PR also for 6.11 or this will be lost like tears in the rain...