On 06/11/2020 10:59, Jaehoon Chung wrote: > 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.
I did my test on the Khadas VIM3L, but we have the exact same issues on the SEI610, VIM3L and now C4 boards. > > 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)? Yes, over 26MHz the eMMC fails, the clock management is in cause and needs to be reworked, but this fix should be fine. Neil > > > Best Regards, > Jaehoon Chung > >> >> Thanks for the patches & reports ! >> >> Neil >> >>> >>> Best Regards, >>> Jaehoon Chung >>> >> >> >
