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Screen refresh timing

Question asked by Kazuma Sasaki on Jun 19, 2019
Latest reply on Jul 3, 2019 by Kazuma Sasaki

From i.MX 6Solo/6DualLite Applications Processor Reference Manual, Rev. 4, 07/2018

 

38.1.2.1.6.1 Screen Refresh
The refresh rate may vary within a predefined range. Within this range, the rate is
dynamically adjusted to the content update rate.

 

Reference manual mentioned that IPU will change display's refresh rate dynamically.

Let me confirm two things with you.

 

Q1. What is meaning of above description? I suppose if DMFC has not updated every frame, refresh rate will be down. is it right?

Q2. How do I know current refresh rate? does any register indicate us the current refresh rate?

 

Best Regards,

Kazuma Sasaki.

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