AM68A: Is there any way to output 4K 60p with DSI 4 L TX with AM68A or AM69A somehow?

Hi Brijesh,

The data sheet states up to 2.5k.
What is the reason for thinking that it can support 4k 60p?

Best Regards,

Ito

Hi Brijesh,

Up to 2.5k is incorrect, and
it is correct to understand that 4k 60p output is possible.
Please let me know if there are any documents or E2E that state that 4k 60p output is possible.
I was unable to find any.

Best Regards,

Ito

Hi Ito-san,

This is mentioned in J784S4 TRM.

Regards,

Brijesh

Hi Brijesh, 

Thank you for your reply.

It's not 4MPix, it's 4K.
4K = 8,294,400 pixels, 4M = 4,000,000 pixels, so
isn't it impossible to output 4K 60fps with DSI?

Best regrds,

Ito

Hi Brijesh, 

Is my opinion correct?

Best Regards,

Ito

Hi Ito-san,

4K is line width, but what about the output height? 

Yes, the total resolution for 60fps output is limited to 4MP, but if the output width is 4K, then height would be limited to 1K.

Regards,

Brijesh 

Hi Brijesh,

I understand that DSI4L does not support 4K/60p.

DSI4L has two ports,
but are these for stereoscopic use?

Is it possible to split a 4K/60p video into left and right channels and output 1920x2160/60p (4.1MPix) from both ports?
Or, is it possible to split a 4K/60p video into odd/even lines and output 3840x1080/60p from both ports?

Best Regards,

Ito

Hi Brijesh,

If implemented on the application side, does this mean that 4K 60fps video (from cameras, video decoders,
or video generated by Qt, etc.) can be output without frame drops using the DSI2 port?

Best Regards,

Ito

Hello Ito-san,

Well, from DSS perspective, it can support 4K 60fps resolution..

regards,

Brijesh

Hi Brijesh,

The DSI port alone cannot output 4K at 60fps, but the DSS (Display Subsystem) itself can output one 4K 60fps signal.
By splitting the DSI 2 port and the application side, it is possible to output 4K at 60fps without dropping frames.
That's my understanding.
Thank you very much.

Best Regards,

Ito