AM62A3: Does CSI2RX accepts YUV420?

Sathiya Narayanan

Intellectual 840 points

Part Number: AM62A3

Tool/software:

Hi,

I have a sensor with in-built ISP which can give out YUV422 (by default) and YUV420.

Now my question is, does CSI2RX accepts YUV420?

If so, what is the media bus format i should define in my sensor driver?

over 2 years ago

0 Jianzhong Xu over 2 years ago

TI__Guru 62430 points

Hello Sathiya,

The CSI-2 RX HW IP accepts YUV420 (8-bit or 10-bit), but the SW driver in current SDK does not support this format. Please refer to the driver code here: https://git.ti.com/cgit/ti-linux-kernel/ti-linux-kernel/tree/drivers/media/platform/ti/j721e-csi2rx/j721e-csi2rx.c?h=ti-linux-6.1.y#n138.

Regards,

Jianzhong

0 Sathiya Narayanan over 2 years ago in reply to Jianzhong Xu

Intellectual 840 points

Hi Jianzhong Xu,

Do you have any patch for csi-bridge to support YUV420?

0 Jianzhong Xu over 2 years ago in reply to Sathiya Narayanan

TI__Guru 62430 points

I don't have at this moment. Which sensor are you using, if you don't mind sharing?

0 Sathiya Narayanan over 2 years ago in reply to Jianzhong Xu

Intellectual 840 points

Hi Jianzhang Xu,
I am using AR051 sensor with in-built ISP AP-1302. So, the in-built ISP is capable of giving YUV420.

The main reason i need YUV420 is because of the h264 encoder, which accepts only YUV420. And also i don't need to use tiovxldc to convert YUV422 to YUV420 as it affect the deep sleep and wakeup.
e2e.ti.com/.../am62a3-deep-sleep-is-giving-error-in-sdk-9-2

0 Jianzhong Xu over 2 years ago in reply to Sathiya Narayanan

TI__Guru 62430 points

Thanks for the background.

It is not a trivial thing to add YUV420 support in the CSI2 Rx driver. There is a GStreamer plugin, ticolorconvert, which can convert YUV422 to YUV420.

You may want to consider that.

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AM62A3: Does CSI2RX accepts YUV420?