Hi, On 11/6/20 6:28 PM, Neil Armstrong wrote: > Hi, > > On 06/11/2020 03:10, Jaehoon Chung wrote: >> Hi, >> >> I have checked U-boot on Odroid-C4 with v2020.10. >> I found a problem about reset behavior. >> >> In my environment, >> - Boot to SD-card, >> - built u-boot v2020.10 with ordoid-c4_defconfig >> - Referred to doc/board/amlogic/odroid-c4.rst >> >> >> If do "reset" command after run command "mmcinfo", it didn't work anymore. >> - After something to do operation relevant to MMC. (read/write or ls mmc, >> etc..) >> >> >> U-Boot 2020.10-00383-g2f27fb20151b-dirty (Nov 06 2020 - 10:37:09 +0900) >> odroid-c4 >> >> Model: Hardkernel ODROID-C4 >> SoC: Amlogic Meson SM1 (Unknown) Revision 2b:c (10:2) >> DRAM: 3.8 GiB >> MMC: sd@ffe05000: 0, mmc@ffe07000: 1 >> In: serial >> Out: serial >> Err: serial >> Net: eth0: ethernet@ff3f0000 >> Hit any key to stop autoboot: 0 >> Odroid N2> >> Odroid N2> >> Odroid N2> >> Odroid N2> >> Odroid N2> >> Odroid N2> mmcinfo >> Device: sd@ffe05000 >> Manufacturer ID: 3 >> OEM: 5344 >> Name: SB16G >> Bus Speed: 50000000 >> Mode: SD High Speed (50MHz) >> Rd Block Len: 512 >> SD version 3.0 >> High Capacity: Yes >> Capacity: 14.8 GiB >> Bus Width: 4-bit >> Erase Group Size: 512 Bytes >> Odroid N2> reset >> resetting ... >> bl31 reboot reason: 0xd >> bl31 reboot reason: 0x0 >> system cmd 1. >> SM1:BL:511f6b:81ca2f;FEAT:A0F83180:20282000;POC:F;RCY:0;EMMC:800;NAND:81;SD?:0;SD:0;READ:0;0.0;CHK:0; >> bl2_stage_init 0x01 >> bl2_stage_init 0x81 >> hw >> id:?M1:BL:511f6b:81ca2f;FEAT:A0F83180:20282000;POC:F;RCY:0;EMMC:800;NAND:81;SD?:0;SD:800;USB:8; > > It's a new one ! > >> >> >> I didn't analyze it in more detail. I will do. But it seems that relevant to >> BL2 binary. >> If nothing to do before reset, it's working fine. > > Is this the same with SDCard ?
Yes. I had tested with same SD-card. (I can't test with eMMC, because eMMC doesn't initialize.) 1) After boot, reset -> fine 2) After boot, run some mmc operation -> reset -> fail. > > The SDCard & eMMC regulators doesn't reset to default when resetting, causing > issues > with the boot ROM... maybe you'll need to reset the regulators in a reset for > the > Odroid C4 board. Actually, i hope that it works fine after building mainline u-boot with odroid-c4_defconfig. Because it seems that supports Odroid-c4. But it doesn't work well. :( For checking, i'm using with u-boot-amlogic with 2021.01-rc1 But eMMC doesn't work.. I'm analyzing this problem..it doesn't work higher mode than 26MHz speed mode. How did you check for eMMC card? I will fix it but i don't have any information about meson_gx_mmc. If i find how to fix it, i will send patch. > >> >> If someone already fixed this or I missed something to do, let me know, plz. > > AFAIK no, I just pushed a fix for the eMMC/SDCard clock causing read issues > at 50MHz. Is it relevant to IO error (-5)? Best Regards, Jaehoon Chung > > Thanks for the patches & reports ! > > Neil > >> >> Best Regards, >> Jaehoon Chung >> > >
