Electronics > FPGA

Cheap FPGA for HDMI 2.0 4k reception?

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nctnico:
For an upcoming project I could use a cheap FPGA that can receive HDMI 2.0 (or better) at 4k 60Hz to create an HDMI to LVDS converter (*). I have found some articles about FPGA vendors claiming to be able to receive HDMI but I have not spotted any parts. I don't need sound or content protection and I have full control over the source. Any suggestions?

* I know there are chips which can do this but these look like boutique parts that could be hard to source long term.

asmi:
HDMI 2.0 requires 6 Gbps per lane, so just about any Artix-7 device with speed grade 2 or 3 will do it. You will need an external level shifter. How "cheap" will it be depends on where you buy it, and what kind of density you require. Also read the datasheet carefully as not all packages bond out transceivers.

nctnico:
Thanks. Those are still rather expensive. Too expensive to replace an HDMI to LVDS board you can buy from China for a few dollars. I also looked at Efinix (Ti90) but those are expensive as well. I'm still hoping there is an FPGA out there with HDMI implemented as a hard-IP block. Gowin makes some mention about it but I have not been able to track down which device has this.

asmi:

--- Quote from: nctnico on September 18, 2023, 09:21:18 am ---Thanks. Those are still rather expensive. Too expensive to replace an HDMI to LVDS board you can buy from China for a few dollars.
--- End quote ---
FPGA solution is always going to be more expensive than a specialized hard silicon device.


--- Quote from: nctnico on September 18, 2023, 09:21:18 am ---I'm still hoping there is an FPGA out there with HDMI implemented as a hard-IP block.
--- End quote ---
Not gonna happen, it's way too specialized and will become obsolete by the time it reaches the market. This is why FPGAs come with generic transceivers which can be used to implement a multitude of different protocols, including those which didn't even exist at a time FPGA design was taped out to manufacturing, as opposed to hard IPs.

Scrts:
What type of LVDS is expected here? One twisted pair? It will be needed to drive a display or to route the data to some other location using a cable and then "deserialized" to HDMI again?

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