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How to change the i.MX28 LCD Dotclk Frequency from 24 MHz to 30 MHz? When enter standby mode how to change the VSYNC and HSYNC from High to Low for decrease the LCD leak current?

Question asked by Chen Yujun on Jul 21, 2012
Latest reply on Apr 4, 2013 by Stefano Tappatà

How to change the i.MX28 LCD Dotclk Frequency from 24 MHz to 30 MHz? When enter standby mode how to change the VSYNC and HSYNC from High to Low for decrease the LCD leak current?

Now in my project, when exit the standby mode the LCD will twinking at the first seconds, after the first seconds the LCD will return to normal, I want to increase the LCD Dotclk frequency from 24 MHz to 30 MHz but the frequency still is 24 MHz. Can you inform me how to change the LCD Dotclk frequency? And I check when exit the standby mode the LCD Dotclk frequency will change from a very fast frequency to 24 MHz, so I think maybe the LCD twinking problem cause by the very fast frequency. Have you any hints?

In addition, for decrease the standby mode curret, we also want to change the VSYNC and HSYNC from High to Low when enter the standby mode, I try to change the register for the VSYNC_POL and HSYNC_POL, but still have not successful. Have you give me help for these issues! Thanks all of you in advance!

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