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HS400 strobe DLL status REF not lock! on eMMC

Question asked by Benjamin Blanton on Oct 7, 2019
Latest reply on Oct 9, 2019 by Benjamin Blanton

Hi,  I just received a new spin of boards with the latest D revision the IMX7D and have am having an issue with several boards.  In the past we always saw this set of warning pop up:

sdhci-esdhc-imx 30b60000.usdhc: warning! HS400 strobe DLL status REF not lock!
sdhci-esdhc-imx 30b60000.usdhc: warning! HS400 strobe DLL status SLV not lock!

 

but now we see this multiple times with IO errors and our linux image will not boot from Flash.  It doesnt happen always, maybe 50% of the time. 


Can anyone help with this?

 

sdhci-esdhc-imx 30b60000.usdhc: warning! HS400 strobe DLL status REF not lock!
sdhci-esdhc-imx 30b60000.usdhc: warning! HS400 strobe DLL status SLV not lock!
sdhci-esdhc-imx 30b60000.usdhc: warning! HS400 strobe DLL status REF not lock!
sdhci-esdhc-imx 30b60000.usdhc: warning! HS400 strobe DLL status SLV not lock!
sdhci-esdhc-imx 30b60000.usdhc: warning! HS400 strobe DLL status REF not lock!
sdhci-esdhc-imx 30b60000.usdhc: warning! HS400 strobe DLL status SLV not lock!
sdhci-esdhc-imx 30b60000.usdhc: warning! HS400 strobe DLL status REF not lock!
sdhci-esdhc-imx 30b60000.usdhc: warning! HS400 strobe DLL status SLV not lock!
sdhci-esdhc-imx 30b60000.usdhc: warning! HS400 strobe DLL status REF not lock!
sdhci-esdhc-imx 30b60000.usdhc: warning! HS400 strobe DLL status SLV not lock!
sdhci-esdhc-imx 30b60000.usdhc: warning! HS400 strobe DLL status REF not lock!
sdhci-esdhc-imx 30b60000.usdhc: warning! HS400 strobe DLL status SLV not lock!
sdhci-esdhc-imx 30b60000.usdhc: warning! HS400 strobe DLL status REF not lock!
sdhci-esdhc-imx 30b60000.usdhc: warning! HS400 strobe DLL status SLV not lock!
print_req_error: I/O error, dev mmcblk1, sector 0 flags 0

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