SD Boot Error in i.MX6D

ko-hey · ‎09-23-2015

Hi all

Someone please advise me.

In our custom board, it can't boot from SD but it can boot from serial boot.

The decision that whether boot is success or not is log outputs from a uart.

If it doesn't output a log, we judged it was failed.

In my understanding, there are no difference between SD boot and serial boot except the location of u-boot after using Boot ROM code.

Is there any difference between SD boot and serial boot ?

If yes, please let me know.

In addition, the board isn't satisfied with a recommendation of placing decoupling capacitors.

Is there any possibility of causing this issue ?

Ko-hey

igorpadykov · ‎09-23-2015

Hi Ko-hey

one can test usdhc interface with SDK (drivers/usdhc test)

it can be run with jtag, it is useful to check signals with oscilloscope

"MX6_PLATFORM_SDK "

After failing boot it may be recommended to check with jtag

boot selection in SRC_SBMR1,2 registers

Regarding "board isn't satisfied with.. placing decoupling capacitors",

one needs to run DDR tests and check if this affects

Note, uboot should be rebuilt with new DDR settings found from DDR tests

Best regards

igor

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