About dynamic changes in VSYNC

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About dynamic changes in VSYNC

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goto11
Contributor III

Hello,

 

I want to dynamically toggle between 30Hz and 60Hz for VSYNC settings.
I don't want screen tearing to occur when changing.
When should I switch the LCD PLL?


best regards
Goto

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igorpadykov
NXP TechSupport
NXP TechSupport

Hi Goto

 

I am afraid it is not feasible as special initialization sequence is needed when changing

timings, it is described in sect.13.2.2.7.1 Code Example to Initialize eLCDIF in VSYNC Mode

(the same is for other modes)

i.MX 7Dual Applications Processor Reference Manual

Those common initialization steps in sect.13.2.2.5 "Initializing the eLCDIF" may lead to tearing.

 

Best regards
igor

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igorpadykov
NXP TechSupport
NXP TechSupport

Hi Goto

 

I am afraid it is not feasible as special initialization sequence is needed when changing

timings, it is described in sect.13.2.2.7.1 Code Example to Initialize eLCDIF in VSYNC Mode

(the same is for other modes)

i.MX 7Dual Applications Processor Reference Manual

Those common initialization steps in sect.13.2.2.5 "Initializing the eLCDIF" may lead to tearing.

 

Best regards
igor

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