A workaround for Banana Pi W2 HDMI input

Banana Pi Router design BPI-W2(RTD1296)
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Thanks to my friend tjjh89017 for sending me a patch that makes W2 HDMI input works.

There are some problems, but it works!!!

demo video

kernel patch.

2 Likes
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my board is not exist “/dev/video0” file. how to create this file??

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you should re-compile the kernel and enable CONFIG_RTK_HDMIRX

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thank you for your reply. I did not think about the CONFIG_RTK_HDMIRX flag. After activating the flag, it compiles and works fine! I hope HW acceleration of Linux is supported soon! thank you.

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I’m a new Linux and BPI-W2 user. I want to do a project using the HDMI input function. Can some one post a pre-built image that has the HDMI workaroung installed? Thanks.

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There is still a problem with this workaround It only supports 720p 30fps right now. And its hardware video engine and GLES is not enable in Linux. A BPI engineer said there will be soon to supporting HDMI IN and video engine in Linux, but I thought we may still need to wait.

By the way, I’m interested in your project. Could you tell me more about that?

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Thanks for the reply. I want to create a HDMI over IP product. I know there are a number of them available already but I want to do my own. The BPI-W2 would be a transmitter. It would convert the HDMI data to IP and send it out. Another BPI SBC would be the receiver. It would take the IP data and convert it back to HDMI.

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Would someone from BPI please let us know the status of the HDMI Input function on Linux? Thanks.

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I thought you should wait for Lunar New Year about 1 week. BPI is a Chinese company.

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I would be interested in doing the same. You could easily use ffmpeg to convert the HDMI input to IP once the input is fully supported.

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Any news here? I need a device which has an hdmi in.

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Here is some news.

But unfortunately, HDMI IN didn’t work fine with general way.
and hardware video encoder still didn’t work

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BPI-W2 is that HDMI2.0a in? I want make like record video something. I had rockpi 4b that can use MIPI with TC3587 to make it, but only 1080p24. if BPI-W2 is HDMI2.0a in, maybe it easy use, but driver like no way. don’t think BPI will code this driver.

wait, i check the code, seem like only use 4 lane mipi. https://github.com/BPI-SINOVOIP/BPI-W2-bsp/blob/ea03a75a5c70417ccb2557c2ae6f9ded6041cba1/linux-rtk/drivers/media/platform/rtk_hdmirx/rtd129x/mipi_wrapper.c#L108

4 lane only 1080p60, can’t use 4k record.

why this wiki said hdmi2.0a in? http://wiki.banana-pi.org/Banana_Pi_BPI-W2#Documents

maybe this SOC use 8 lane mipi? only this way can use 4k.