Hi, I'm trying to get some insights about how to debug emmc speed issue. We're using board with am437x CPU using mainline 4.12 kernel (added only devicetree for our custom board). eMMC is 8bit connect (using sandisk SDINBDG4-8G-I1 chip). Issue is that when copying data from SD card to eMMC we get throughput only ~300kB/s (it should be bit higher IIRC). I'm just looking for some advice what to check and how to find out where issue can be (still unsure if SW or HW). Thanks a lot. BR, marek
