On 11/6/20 7:01 PM, Neil Armstrong wrote: > 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.
This issue is fixed after applied my patch. Also "reset" is working fine. https://patchwork.ozlabs.org/project/uboot/patch/20201109031233.25320-1-jh80.ch...@samsung.com/ Best Regards, Jaehoon Chung > > Neil > >> >> >> Best Regards, >> Jaehoon Chung >> >>> >>> Thanks for the patches & reports ! >>> >>> Neil >>> >>>> >>>> Best Regards, >>>> Jaehoon Chung >>>> >>> >>> >> > >
