i.MX6Q - LDB clock's parent selection

[ansaris <ansaris@iwavesystems.com>]

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Hi,

We are using imx6Q custom platform for our development which is based on 
sabresd platform.
We are using Linux 3.14.28_1.0.0-GA BSP for our development. But 
initially we used Linux 3.10.53_1.0.0-GA BSP.

 From Linux 3.10.53_1.0.0-GA BSP, we have referred the below Linux 
kernel clock file.
~/linux-imx/arch/arm/mach-imx/clk-imx6q.c
We understood that the below function will set the LDB clock parent and 
the default LDB clock parent is "pll2_pfd0_352m".
"init_ldb_clks"

But In Linux 3.14.28_1.0.0-GA BSP, we couldn't identify the parent clock 
of LDB(LDB_DI0_SEL) clock. Please help us to understand

In our custom board, we are having LVDS0 800x480 display which is 
working with Linux 3.10.53_1.0.0-GA BSP.
The issue we are facing is,
In Linux 3.14.28_1.0.0-GA BSP, we have modified the corresponding lvds0 
timing parameters in device tree. Now we are not getting the LVDS0 display.
But if we keep the clock frequency as 65Mhz (as used in 
~/linux-imx/arch/arm/boot/dts/imx6qdl-sabresd.dtsi) then we are able to 
get the display.
Please note that, we have changed only clock frequency value and other 
timing parameters are kept for 800x480 resolution.

We believe, the LDB clock's parent is the problem for our above issue.

Please help us to resolve the issue.

Thank You,
Regards,
Ansari

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