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TDA4VM: Issue in QNX+RTOS SD boot using SPL+Uboot

sagarkirtany
Genius 4950 points
Part Number: TDA4VM

Hello,

My environment is as follows.

Host OS: Ubuntu 20.04 LTS 64-bit

SDK: PROCESSOR-SDK-RTOS-J721E 7.01.00.11

EVM: J721EXCP01EVM+J721EXSOMG01EVM

I am attempting to run vision app demos in QNX+RTOS mode using SD card. I followed all steps from TI documentation on this topic. When I boot up the EVM, it shows the following output.

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U-Boot SPL 2020.01-g3c9ebdb87d (Nov 19 2020 - 18:33:21 +0000)
SYSFW ABI: 3.1 (firmware rev 0x0014 '20.8.5--v2020.08b (Terrific Lla')
Trying to boot from MMC2
Loading Environment from MMC... *** Warning - No MMC card found, using default environment
Starting ATF on ARM64 core...
NOTICE: BL31: v2.3():07.01.00.004-1-g52c334fc3-dirty
NOTICE: BL31: Built : 18:17:14, Nov 19 2020
U-Boot SPL 2020.01-g3c9ebdb87d (Nov 19 2020 - 18:29:59 +0000)
SYSFW ABI: 3.1 (firmware rev 0x0014 '20.8.5--v2020.08b (Terrific Lla')
Detected: J7X-BASE-CPB rev E3
Detected: J7X-GESI-EXP rev E2
Detected: J7X-VSC8514-ETH rev E2
Trying to boot from MMC2
U-Boot 2020.01-g3c9ebdb87d (Nov 19 2020 - 18:29:59 +0000)
SoC: J721E SR1.0
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

As per TI suggestion in E2E post https://e2e.ti.com/support/processors-group/processors/f/processors-forum/982877/tda4vm-sd-card-boot-qnx-unable-to-access-ti_fs-scripts-user-sh, I ran the QNX SD launch commands and received the following output.

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J7EVM# slay -f devb-sdmmc-am65x
slay: proc/boot/devb-sdmmc-am65x 9 on (tty not known)
slay: proc/boot/devb-sdmmc-am65x 10 on (tty not known)
J7EVM# slog2info -c
J7EVM# slog2info -w &
[1] 49161
random.5 low 0 -----UNSYNC-----
random.5 high 0 -----UNSYNC-----
Jan 01 00:00:00.010 console.2 0 -----ONLINE-----
console.2 out 0 -----UNSYNC-----
Jan 01 00:00:00.017 random.5 0 -----ONLINE-----
random.5 default 0 -----UNSYNC-----
Jan 01 00:00:00.018 random.5..0 0 -----ONLINE-----
random.5..0 slog 0 -----UNSYNC-----
Jan 01 00:00:00.042 iopkt.11 0 -----ONLINE-----
iopkt.11 main_buffer 0 -----UNSYNC-----
Jan 01 00:00:00.050 io_usb_otg.12300 0 -----ONLINE-----
io_usb_otg.12300 slog 0 -----UNSYNC-----
J7EVM# devb-sdmmc-am65x blk noatime,cache=8M,automount=@/proc/boot/automount cam cache,async,quiet,pnp sdio addr=0x04fb0000,irq=36,timing=~sdr,bs=sscfg=0x8000:ldo=0x600000^117:pwrdev1
J7EVM# Jan 01 00:00:57.496 devb_sdmmc_am65x.53258 0 -----ONLINE-----
Jan 01 00:00:57.496 devb_sdmmc_am65x.53258 slog* 1800 devb-sdmmc-am65x 1.00A (Sep 15 2021 14:04:15)
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

I have verified that there are no issues in the build. But due to the above issue, I am not able to proceed any further. Is there anything else that I can try?

Thanks and regards.

  • 0
    TI__Guru** 111261 points

    Hi,

    The SD card driver at the HLOS level is not working as expected.   Is the test being done with the SD card that came with the EVM Kit?  If not please try a different type of SD card if you have not tried this already.

    As per link in your post, testing with the "timing=~sdr", option which will force the SD card to run at a lower speed, is a good test.

    When launching the driver try increasing verbosity, to get more information:

    devb-sdmmc-am65x blk cache=1m sdio verbose=99,addr=0x04fb0000,irq=36,bs=sscfg=0x8000:ldo=0x600000^117:pwrdev=/dev/i2c0 cam pnp disk name=sd

    At the Uboot level you could try disabling UHS support with below patch and see if that has any effect on the SD driver, when it started by the HLOS:

    https://git.ti.com/gitweb?p=ti-u-boot/ti-u-boot.git;a=commit;h=c66dd9b8467472278803c2426098a2828c93ebcc

    Please note that the SD driver is provided as part of the QNX/Blackberry BSP, and they can be contacted for support.   Depending on BSP under test, it may be that there is an updated BSP available on QNX Software Center for the J721E EVM, which can be checked for an changes to the SD driver.

    Regards,

    kb

  • 0 in reply to KB
    Genius 4950 points

    Hello KB,

    In my initial tests, I did not use the SanDisk SD cards that came with the EVM kits. I was attempting to use a Strontium card, which has nearly the same specifications as the SanDisk cards from the EVM kits.

    Today, I tried out a brand-new SanDisk Ultra SD card. This one worked just fine without any tweaks. It is possible that you are correct regarding the QNX BSP, but that part cannot be confirmed without more trials.

    In any case, since my issue is resolved, I am closing this thread. And I guess I will stick to SanDisk SD cards from now on.

    Thanks and regards.