Most of the eMMC command communication done as part of the MMCSD_phyInit() function is performed in Legacy SDR mode however the function does not configure any of the required DLL settings for that timing mode, such as ITAPDLYENA, ITAPDLYSEL, SELDLYTXCLK, SELDLYRXCLK, and CLKBUFSEL.

This leads to the initialization sequence not getting executed reliably on certain boards and with this to system failures. Adding the setting of these control bits to the initialization flow has shown to allow failing boards to initialize and boot successfully.