topic Re: HS400 strobe DLL status REF not lock! on eMMC in i.MX Processors https://community.nxp.com/t5/i-MX-Processors/HS400-strobe-DLL-status-REF-not-lock-on-eMMC/m-p/953213#M142465 <HTML><HEAD></HEAD><BODY><P>Hi Benjamin</P><P></P><P>reason may be additional board noise on some boards, one can try to</P><P>tweak emmc drive strength using DSE field iomux pad register, like IOMUXC_SW_PAD_CTL_PAD_SD3_DATA1.</P><P>Also may be useful to check board power supplies for noise, pay attention to ripple requirement</P><P>described in <A href="https://www.nxp.com/webapp/Download?colCode=IMX7DSHDG" target="_blank"><STRONG>Hardware Development Guide for i.MX7Dual and 7Solo Applications Processors</STRONG></A></P><P></P><P>Best regards<BR />igor<BR />-----------------------------------------------------------------------------------------------------------------------<BR />Note: If this post answers your question, please click the Correct Answer button. Thank you!<BR />-----------------------------------------------------------------------------------------------------------------------</P></BODY></HTML> Mon, 07 Oct 2019 23:11:34 GMT igorpadykov 2019-10-07T23:11:34Z HS400 strobe DLL status REF not lock! on eMMC https://community.nxp.com/t5/i-MX-Processors/HS400-strobe-DLL-status-REF-not-lock-on-eMMC/m-p/953212#M142464 <HTML><HEAD></HEAD><BODY><P>Hi,&nbsp; I just received a new spin of boards with the latest D revision the IMX7D and have am having an issue with several boards.&nbsp; In the past we always saw this set of warning pop up:</P><P>sdhci-esdhc-imx 30b60000.usdhc: warning! HS400 strobe DLL status REF not lock!<BR />sdhci-esdhc-imx 30b60000.usdhc: warning! HS400 strobe DLL status SLV not lock!</P><P></P><P>but now we see this multiple times with IO errors and our linux image will not boot from Flash.&nbsp; It doesnt happen always, maybe 50% of the time.&nbsp;</P><P><BR />Can anyone help with this?</P><P></P><P>sdhci-esdhc-imx 30b60000.usdhc: warning! HS400 strobe DLL status REF not lock!<BR />sdhci-esdhc-imx 30b60000.usdhc: warning! HS400 strobe DLL status SLV not lock!<BR />sdhci-esdhc-imx 30b60000.usdhc: warning! HS400 strobe DLL status REF not lock!<BR />sdhci-esdhc-imx 30b60000.usdhc: warning! HS400 strobe DLL status SLV not lock!<BR />sdhci-esdhc-imx 30b60000.usdhc: warning! HS400 strobe DLL status REF not lock!<BR />sdhci-esdhc-imx 30b60000.usdhc: warning! HS400 strobe DLL status SLV not lock!<BR />sdhci-esdhc-imx 30b60000.usdhc: warning! HS400 strobe DLL status REF not lock!<BR />sdhci-esdhc-imx 30b60000.usdhc: warning! HS400 strobe DLL status SLV not lock!<BR />sdhci-esdhc-imx 30b60000.usdhc: warning! HS400 strobe DLL status REF not lock!<BR />sdhci-esdhc-imx 30b60000.usdhc: warning! HS400 strobe DLL status SLV not lock!<BR />sdhci-esdhc-imx 30b60000.usdhc: warning! HS400 strobe DLL status REF not lock!<BR />sdhci-esdhc-imx 30b60000.usdhc: warning! HS400 strobe DLL status SLV not lock!<BR />sdhci-esdhc-imx 30b60000.usdhc: warning! HS400 strobe DLL status REF not lock!<BR />sdhci-esdhc-imx 30b60000.usdhc: warning! HS400 strobe DLL status SLV not lock!<BR />print_req_error: I/O error, dev mmcblk1, sector 0 flags 0</P></BODY></HTML> Mon, 07 Oct 2019 19:58:35 GMT https://community.nxp.com/t5/i-MX-Processors/HS400-strobe-DLL-status-REF-not-lock-on-eMMC/m-p/953212#M142464 benjaminblanton 2019-10-07T19:58:35Z Re: HS400 strobe DLL status REF not lock! on eMMC https://community.nxp.com/t5/i-MX-Processors/HS400-strobe-DLL-status-REF-not-lock-on-eMMC/m-p/953213#M142465 <HTML><HEAD></HEAD><BODY><P>Hi Benjamin</P><P></P><P>reason may be additional board noise on some boards, one can try to</P><P>tweak emmc drive strength using DSE field iomux pad register, like IOMUXC_SW_PAD_CTL_PAD_SD3_DATA1.</P><P>Also may be useful to check board power supplies for noise, pay attention to ripple requirement</P><P>described in <A href="https://www.nxp.com/webapp/Download?colCode=IMX7DSHDG" target="_blank"><STRONG>Hardware Development Guide for i.MX7Dual and 7Solo Applications Processors</STRONG></A></P><P></P><P>Best regards<BR />igor<BR />-----------------------------------------------------------------------------------------------------------------------<BR />Note: If this post answers your question, please click the Correct Answer button. Thank you!<BR />-----------------------------------------------------------------------------------------------------------------------</P></BODY></HTML> Mon, 07 Oct 2019 23:11:34 GMT https://community.nxp.com/t5/i-MX-Processors/HS400-strobe-DLL-status-REF-not-lock-on-eMMC/m-p/953213#M142465 igorpadykov 2019-10-07T23:11:34Z Re: HS400 strobe DLL status REF not lock! on eMMC https://community.nxp.com/t5/i-MX-Processors/HS400-strobe-DLL-status-REF-not-lock-on-eMMC/m-p/953214#M142466 <HTML><HEAD></HEAD><BODY><P>Hi Igor,</P><P></P><P>It looks like there is a kernal update related to a delay on the data strobe that fixes this issue.</P><P></P><P><A href="https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?h=next-20191009&amp;id=2eaf5a533afd92709c8df335552b28f9fcd75336">https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?h=next-20191009&amp;id=2eaf5a533afd92709c8df335552b28f9fcd75336</A></P></BODY></HTML> Wed, 09 Oct 2019 18:09:07 GMT https://community.nxp.com/t5/i-MX-Processors/HS400-strobe-DLL-status-REF-not-lock-on-eMMC/m-p/953214#M142466 benjaminblanton 2019-10-09T18:09:07Z