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LVDS clock on i.MX53

Question asked by SAMARTH MEHTA on Mar 20, 2015
Latest reply on Apr 17, 2015 by SAMARTH MEHTA

Hi, all,

 

I need a frequency of 33.26 MHz for the LVDS clock signal, but I am getting 66 MHz.

I have added the following mode to the ldb_modedb[] array in /drivers/video/mxc/ldb.c and mx53_evk.c:

 

{

     "SVGA", 60, 800, 480, 30066,

     128,128,

     23, 22,

     0, 0,

     FB_SYNC_CLK_LAT_FALL,

     FB_VMODE_NONINTERLACED,

     0

,},

 

 

My LCD is working, but display is stretched out unless I use pixel clock as 17250 instead of 30066.  Regardless of what pixel clock value I use, I get 66 MHz on LVDS clock line, which is out of spec for LCD and it puts noise on our boards. 

 

I am using i.MX53 and freescale version of Linux kernel 2.6.35.

Can you please guide me where I need to change clock frequencies to achieve 33.26 MHz?

Thanks

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