DSI_PLL_LOCK failed on Sitara AM3505

Davey Thomas

Other Parts Discussed in Thread: AM3505

Hi,

I'm having some functional tests written for the AM3505 one of the problems we are having with our display is shown below:

LCD 24-bit display test suite

LCD 24-bit Initialization Test

################################################################# Passed!

ERROR: DSI PLL_LOCK failed

Comprehensive Display Test Suite

Colorbar Test

Is there any insight as to what would cause this error?

over 13 years ago

0 Vaibhav Hiremath over 13 years ago

TI__Expert 8180 points

I am quite not sure which functional test code you are referring to, but it seems like PLL is failing to lock the clock. Can you check and conform whether your DPLL configuration is correct.

You also may want to refer to the TRM section "Set Up DSI DPLL" for exact steps to configure DSI DPLL. Also as a reference you can use Linux driver available at

http://arago-project.org/git/projects/?p=linux-omap3.git;a=blob;f=drivers/video/omap2/dss/dsi.c;h=1d802d6ad1f3ef62e3c1c6187bb621eb1f789d56;hb=40f5ff96ca8b42280eb22b623c012d54803b5bf1

Thanks,

Vaibhav

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DSI_PLL_LOCK failed on Sitara AM3505