https://community.nxp.com/t5/i-MX-Processors/About-dynamic-changes-in-VSYNC/m-p/1202687#M166812 <P>Hello,</P><P>&nbsp;</P><P>I want to dynamically toggle between 30Hz and 60Hz for VSYNC settings.<BR />I don't want screen tearing to occur when changing.<BR />When should I switch the LCD PLL?</P><P><BR />best regards<BR />Goto</P> Tue, 22 Dec 2020 01:57:19 GMT goto11 2020-12-22T01:57:19Z https://community.nxp.com/t5/i-MX-Processors/About-dynamic-changes-in-VSYNC/m-p/1202687#M166812 <P>Hello,</P><P>&nbsp;</P><P>I want to dynamically toggle between 30Hz and 60Hz for VSYNC settings.<BR />I don't want screen tearing to occur when changing.<BR />When should I switch the LCD PLL?</P><P><BR />best regards<BR />Goto</P> Tue, 22 Dec 2020 01:57:19 GMT https://community.nxp.com/t5/i-MX-Processors/About-dynamic-changes-in-VSYNC/m-p/1202687#M166812 goto11 2020-12-22T01:57:19Z https://community.nxp.com/t5/i-MX-Processors/About-dynamic-changes-in-VSYNC/m-p/1202776#M166821 <P>Hi Goto</P> <P>&nbsp;</P> <P>I am afraid it is not feasible as special initialization sequence is needed when changing</P> <P>timings, it is described in sect.13.2.2.7.1 Code Example to Initialize eLCDIF in VSYNC Mode</P> <P>(the same is for other modes)</P> <P><A id="relatedDocsClick_1" href="https://www.nxp.com/webapp/Download?colCode=IMX7DRM" target="_blank" rel="noopener"><STRONG>i.MX 7Dual Applications Processor Reference Manual</STRONG></A></P> <P>Those common initialization steps in sect.13.2.2.5 "Initializing the eLCDIF" may lead to tearing.</P> <P>&nbsp;</P> <P>Best regards<BR />igor</P> Tue, 22 Dec 2020 04:57:17 GMT https://community.nxp.com/t5/i-MX-Processors/About-dynamic-changes-in-VSYNC/m-p/1202776#M166821 igorpadykov 2020-12-22T04:57:17Z