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Question, i.MX51 Display clock setting

Question asked by AVNET JAPAN FAE (team share account) on Jan 25, 2017
Latest reply on Jan 26, 2017 by igorpadykov

Dear team,


I would like to ask bout DSP_CLK setting of i.MX51.

My customer wants to change DSP_CLK setting of i.MX51.

Now they are using display interface of i.MX51 to output display data with DSP_CLK’s FALLING edge.

And they want to change it to output display data with DSP_CLK’s RISING edge.

It is possible?

They are using your LinuxBSP(L.2.6.31 base) and they believe that they should modify the source code as below to achieve that.

In source file ipu_common.c, and in ipu_pixel_clk_set_rate() function,

_raw_writel((dev/16)<< 16, DI_BS_CLKGEN1(clk->id));

The above statement should change as below;

_raw_writel(((dev/16)*2)<< 16 | (dev/16) , DI_BS_CLKGEN1(clk->id));

Is it true?