Why the Error Injection using Linux* debugfs interface does not work for SDMMC ECC Port B? - Why the Error Injection using Linux* debugfs interface does not work for SDMMC ECC Port B? Description Due to a problem in the EDAC (Error Detection and Correction) driver, the Error Injection using Linux* debugfs interface on SDMMC ECC Port B is not functioning. The error injection command below does not write to INIT test register as intended. echo C > /sys/kernel/debug/edac/sdmmca-ecc/altr_trigger As comparison, when writing directly to the INITTEST register, single bit error interrupt is shown to be working. root@agilex7dksiagf014eb:~# devmem2 0xFF8C8C26 h 0x1 ----- /dev/mem opened.[ 1785.685802] EDAC DEVICE6: CE: Altera ECC Manager instance: sdmmcb-ecc0 block: sdmmcb-ecc0 count: 1 'sdmmcb-ecc' This issue is impacting Agilex® 7 SoC FPGA devices and Quartus® Prime software of version 25.3.1 and older. Resolution To workaround this issue, apply the patch by following the instructions below: git clone the repo https://github.com/altera-fpga/linux-socfpga/commits/socfpga-6.18.2-lts/ run: git format-patch -1 Use “git am” to apply the patch onto your source code. Additional Information This issue is fixed in Quartus Prime software version 26.1 onwards. Custom Fields values: ['novalue'] Troubleshooting ES-406 novalue ['novalue'] ['FPGA Dev Tools Quartus® Prime Software Pro'] 26.1 25.3.1 ['Agilex™ 7 FPGAs and SoCs'] ['novalue'] ['novalue'] ['novalue']