wc7086
Posts: 4
Joined: Thu Aug 23, 2018 2:44 pm

Can the raspberry pie display the desktop in 4K P60 8bit+FRC (10bit)?

Fri Sep 06, 2019 10:05 am

Can the raspberry pie display the desktop in 4K P60 8bit+FRC (10bit)?
Last edited by wc7086 on Fri Sep 06, 2019 5:37 pm, edited 1 time in total.

aBUGSworstnightmare
Posts: 1499
Joined: Tue Jun 30, 2015 1:35 pm

Re: Can the raspberry pie display the desktop in 4K P60 8bit-high FRC (10bit)?

Fri Sep 06, 2019 10:54 am

FRC is a controller board topic, so if your AD-board is able to drive a 10-bit (8bit+FRC panel) then the input is 8bit only.

To answer your question: yes.

wc7086
Posts: 4
Joined: Thu Aug 23, 2018 2:44 pm

Re: Can the raspberry pie display the desktop in 4K P60 8bit-high FRC (10bit)?

Fri Sep 06, 2019 2:27 pm

aBUGSworstnightmare wrote:
Fri Sep 06, 2019 10:54 am
FRC is a controller board topic, so if your AD-board is able to drive a 10-bit (8bit+FRC panel) then the input is 8bit only.

To answer your question: yes.
Now I know that the source output should be 10 bits, and the controller will convert 10 bits through the FRC to 8bit+FRC output to the 8bit+FRC screen. Raspberry pie 4B does not support 10bit hdmi output, so 8bit+FRC cannot be used to display the desktop.
Last edited by wc7086 on Fri Sep 06, 2019 5:38 pm, edited 2 times in total.

6by9
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Re: Can the raspberry pie display the desktop in 4K P60 8bit-high FRC (10bit)?

Fri Sep 06, 2019 2:43 pm

FRC - Frame Rate Control - https://en.wikipedia.org/wiki/Frame_rate_control
This is not a function of the source, it is something the display does to emulate a greater bit depth.

If you are asking whether the Pi generates 10bit HDMI images, then no it doesn't at present. The hardware is capable of it, but software support for HDR is very limited.
The standard X desktop doesn't make use of it anyway, so it is really only relevant when playing back videos with things like Kodi.
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wc7086
Posts: 4
Joined: Thu Aug 23, 2018 2:44 pm

Re: Can the raspberry pie display the desktop in 4K P60 8bit-high FRC (10bit)?

Fri Sep 06, 2019 3:30 pm

6by9 wrote:
Fri Sep 06, 2019 2:43 pm
FRC - Frame Rate Control - https://en.wikipedia.org/wiki/Frame_rate_control
This is not a function of the source, it is something the display does to emulate a greater bit depth.

If you are asking whether the Pi generates 10bit HDMI images, then no it doesn't at present. The hardware is capable of it, but software support for HDR is very limited.
The standard X desktop doesn't make use of it anyway, so it is really only relevant when playing back videos with things like Kodi.
Can it output 8bit desktops via hdmi?

aBUGSworstnightmare
Posts: 1499
Joined: Tue Jun 30, 2015 1:35 pm

Re: Can the raspberry pie display the desktop in 4K P60 8bit-high FRC (10bit)?

Fri Sep 06, 2019 4:14 pm

Yes, HDMI is 24bit color (8bit each for RGB).

As said, your display uses FRC, so your controller board will use any input.
Maybe you should mention which hardware you want to use

Btw: here is what a 4k desktop looks like https://www.raspberrypi.org/forums/view ... 3#p1491361
Full image https://drive.google.com/file/d/17K1S4m ... sp=sharing

The display which I'm using is a Sharp 31.5in UHD, connected to a Digitalview SVX-4096 controller

Look af the controller spec here https://www.digitalview.com/controllers ... oller.html where no of colors is of interrest for you: upnto 10-bit per color

So again, yes, it's possible to use FRC 10-bit displays

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