TDA4VH-Q1: wave521c Encoder performance is different from manual

Hello, 

Each instance of the Wave5 is capable of 480MP/s at 500 MHz. However, if you run "k3conf dump clock 241" if you are using Linux SDK, you can see that we run video accelerator at higher frequency, which is why you are seeing a higher pixel rate being supported. 

Thanks,

Brandon

Indeed, I saw it is 600MHZ,

May I ask what these clocks mean, and which piece of code in the kernel sets them?

Nowhere in the Kernel sets these frequencies. This is done by system firmware, the device ID, 241, is the identifier in firmware. 

You can change these frequencies in the driver, however. Look into using dev_pm_opp_set_rate if you would like to limit the IP to using only 500MHz.

https://git.ti.com/cgit/ti-linux-kernel/ti-linux-kernel/commit/?h=ti-linux-6.1.y-cicd&id=1bb45095919cd3307dd7729168754a3212b7a119 is a commit that added changing frequency based on the input video resolution. It's still a developing feature, but it can be used to help you change the frequency. 

thank you for your reply

I also want to know, ACLK, BCLK, CCLK, PCLK, what are the differences between these four clocks? Which parts are they mainly supplied to?

I understand, thank you