i.MX Processors中的主题 Re: EMMC boot Problem with IMX6DL

EMMC boot Problem with IMX6DL

ssp — Wed, 19 Aug 2015 11:03:34 GMT

Hai,

We have designed custom board as a refernce by sabre sd dual lite.

I am using MFG tool for loading images.

The buit customized images U boot,U Image and rootfs loaded successfully into EMMC card usinf MFG tool when I configured board name in cfg.ini file with i.MX6DL-SABRESD_eMMC

But no UART messages while booting from EMMC.

We have used EMMC as SDIN7DU2-8G,instaed of sabre MTFC8GLCDM emmc.

I have set BT_CFG pins properly.

IS there any changed need to made form booting and read images from EMMC card?

Please let me know anyone know this problem.and kindly reply with some suggestions ASAP.

Re: EMMC boot Problem with IMX6DL

igorpadykov — Wed, 19 Aug 2015 11:58:47 GMT

Hi ss

MTFC8GLCDM is eMMC 4.51, but it should boot well without additional

changes. Note, board layout and drive strength may affect signal quality,

which causes boot failures. For example one can look at below link

eMMC 8GB to 4GB - crash on linux (yocto) boot

Best regards

igor

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Re: EMMC boot Problem with IMX6DL

ssp — Wed, 19 Aug 2015 12:06:44 GMT

hi,

Thanks for immediate response.

The pin configuration and io mux pins connections signal strength all are matching,there is no changes in hardware wise.

Please let me know what are other things i need to observe...

thanks

Re: EMMC boot Problem with IMX6DL

igorpadykov — Wed, 19 Aug 2015 14:07:31 GMT

you can test signals with oscilloscope and data analyzer

to check where emmc communication stops and check

boot configuration in SBMR1,2 register connecting to processor

with jtag.

~igor

Re: EMMC boot Problem with IMX6DL

ssp — Thu, 20 Aug 2015 05:57:59 GMT

hai,

Actually I can able to write the images and able to read images also .

But runtime env variables also not loading to EMMC failing error: no MMC present.

And board not able to boot automatically when i switch to internal boot.

Re: EMMC boot Problem with IMX6DL

igorpadykov — Thu, 20 Aug 2015 07:20:51 GMT

yes you can be able to write the images and able to read images

in mfg tools and linux, because they use different pad settings then when

device boots. Please read once more time suggested link in first reply.

Also you can start to debug it with testing signals with oscilloscope and data analyzer

to check where emmc communication stops and check

boot configuration in SBMR1,2 register connecting to processor

with jtag.

~igor

Re: EMMC boot Problem with IMX6DL

ssp — Thu, 20 Aug 2015 08:20:24 GMT

ok fine,I will check it once again.

Thank you

Re: EMMC boot Problem with IMX6DL

ssp — Thu, 20 Aug 2015 11:08:48 GMT

hi,

In that its mentioned solution for Linux boot,but for my board its not at all booting uboot also.....

Re: EMMC boot Problem with IMX6DL

igorpadykov — Thu, 20 Aug 2015 11:48:35 GMT

when board stops please connect jtag debugger

and check boot configuration in SBMR1,2 registers.

Had you checked emmc signals with oscilloscope, are they OK ?

Re: EMMC boot Problem with IMX6DL

fabio_estevam — Thu, 20 Aug 2015 13:09:14 GMT

Maybe you need to enable the boot partition.

Please check how I did this on a imx6sl-warp board:

git.denx.de Git - u-boot.git/commitdiff