imx6q system can't boot on eMMC

[zhengcl]

Hi,

We are working imx6q. We can download image to SD card using SD2 and boot with the SD card. We can download image to eMMC, but we can't boot with eMMC, there is no information in the debug port.

Boot to u-boot with SD card , check the information of mmc device,  showing as follow:

=> mmc list

FSL_SDHC: 0

FSL_SDHC: 1

FSL_SDHC: 2

=> mmc dev 0     //SD card

mmc0 is current device

=> mmc dev 1

MMC: no card present        // not find eMMC

mmc1(part 0) is current device

=> mmc dev 2

Card did not respond to voltage select!

mmc2(part 0) is current device

Please help me analyze the reason. How can I solve the problem?

Thanks!

[igorpadykov]

Hi zhengcl

it looks like hardware problem: one can check signals with oscilloscope.

Also it may be useful to check with other eMMC as some has rpmb partition

which may impose some access restrictions.

Best regards

igor

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[zhengcl]

we have replaced the eMMC IC, the function of  eMMC is OK now.

Thank you!