BeagleV - HDMI video out, is it really 30 frames per second?

In the available documentation via the web, the video output from the HDMI connector is listed as;

  • 1 x HDMI support up to 1080P@30FPS

Is this correct?

Some computer monitors won’t do 30 frames per second. For example, my older ViewSonic monitor is limited to 50 - 76 frames per second. Thus, the BeagleV board would not work on it.

That said, this looks like a wonderful board, and one I will follow it’s progress.

Hi Arwen,

That smells like the old wiki for the "BeagleBone"... The HDMI spec's
of the "BeagleV" has not been officially released yet. :wink:

Regards,

In the available documentation via the web, the video output from the HDMI connector is listed as;

1 x HDMI support up to 1080P@30FPS

Where is this so I can fix it. It should be 1080p60.

Is this correct?

Some computer monitors won’t do 30 frames per second. For example, my older ViewSonic monitor is limited to 50 - 76 frames per second. Thus, the BeagleV board would not work on it.

That said, this looks like a wonderful board, and one I will follow it’s progress.

Hi Arwen,

That smells like the old wiki for the “BeagleBone”… The HDMI spec’s
of the “BeagleV” has not been officially released yet. :wink:

Sure, but we can check with the design and designers. I think it could be higher in the production version. The primary limitation is the use of a parallel LCD interface and an HDMI framer device, a TDA19988. Now do you know why the limitation sounds familiar? :wink:

The DSI can output 4K@30fps.

I checked with the designers and tweeted about this at:

https://twitter.com/Jadon/status/1349403122599387136

I’ll try to send our first FAQ e-mail out to this list in a week or two and will make sure this is included.

This is the web page that I am referring to;

https://beaglev.seeed.cc/

It clearly states 30 frames per second as;

• 1 x HDMI support up to 1080P@30FPS

That’s the encoder/decoder ip block, not the actual hdmi output…

Thanks.

Looks like the other web site has slightly different information;

http://beagleboard.org/beaglev

• 1 x HDMI 1.4 support up to 1080P@60fps

This is more hopeful. That was one of the things that would have stopped me from buying one.

The other site, has @30fps

https://beaglev.seeed.cc/

This is the web page that I am referring to;

https://beaglev.seeed.cc/

It clearly states 30 frames per second as;

• 1 x HDMI support up to 1080P@30FPS

It is correct. I verified with the hardware engineer in charge. The LCD+framer output is limited to 1080P@30fps.

The DSI output will be at 4K@30fps.

So, I was wrong.

First off, thank you for your work and engagement to Jason and/or any others involved who may read this. The BeagleV is looking fantastic.

Now, a small issue: The sites still mismatch substantially when it comes to clock speeds and video output. To really clarify what Arwen found, see the two following screencaps (with red lines added):

The top screencap was taken from BeagleBoard.org - BeagleV says “60fps” (and “HDMI 1.4”):
both

The lower screencap taken from https://beaglev.seeed.cc/ says “30FPS”:

Additionally, a couple of other things mismatch, most significantly the U74 clock speed.
1.0GHz according to BeagleBoard. org, while seeed.cc says 1.5GHz.

I don’t know the right answer, but I hope that pointing it out is some help. Please excuse the messy formatting - I’m under “new user” limits, so just one image and just two links.

If you would like a detailed list of differences and which sites list the incorrect information, do ask and I’ll do a bit of a manual scrape.

All the best,
Caesar

I will followup with StarFive to get clarification on the FPS.

The clock rate difference is to due to there being a test SoC called the JH7100 (2x SiFive U74 cores) and the production SoC called the JH7110 (4x SiFive U74 cores plus PCIe and GPU).

There is more information in this FAQ: Getting Started with BeagleV™ - StarLight - Seeed Wiki

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