AM623: SD card compatibility issue

Sung-IL

Part Number: AM623

Dear Champs,

My customer has a trouble to boot-up their custom board using SD card. The issue is that kernel copy failed in some SD card with below log whereas there is no issue in other SD card.

In their customer board, AM6231 GP device(AM6232ATCGGAALW) was used and they are using Linux SDKv8.6.0.

Do you think this issue caused by default setting for HSFS device in Linux SDKv8.6.0 and this issue can be resolved when below patch will be applied?

https://e2e.ti.com/support/processors-group/processors/f/processors-forum/1210443/faq-am625-generating-sitara-am62x-am62ax-am64x-gp-device-bootable-mmc-sd-card-images-using-sdk-v8-6-and-yocto?tisearch=e2e-sitesearch&keymatch=am62x%20AND%20gp%20AND%20sdk#

booting was success in below SD card,

* Samsung EVO 32

Boot failed SD card.

* Samsung EVO+ 32

* Sandisk Industrial 32GB, 8GB

Thanks and Best Regards,

SI.

over 2 years ago

0 Sung-IL over 2 years ago

TI__Mastermind 30810 points

Dear Champs,

Is there any update on this?

the only difference between custom board and SK EVM is voltage. e.g. 1.8V was used in SK-EVM, but 3.3V was used in custom board as below.

uSD_20230428.pdf

Thanks and Best Regards,

SI.

0 Judith Mendez over 2 years ago in reply to Sung-IL

TI__Expert 8480 points

Hello,
Please allow a few days to look into this issue.

0 Bin Liu over 2 years ago in reply to Sung-IL

TI__Guru**** 167421 points

Hi SI,

Can you please ask the customer to add 'no-1-8-v;" to the sdhci1 device tree node in u-boot k3-am62-main.dtsi to see if this can make the failure SD card to boot? This disable SD card HS modes.

+1 Sung-IL over 2 years ago in reply to Bin Liu

TI__Mastermind 30810 points

Hi Bin,

Just adding 'add 'no-1-8-v;" was not help to resolve issue, but my customer resolve it thanks to your support and below link with below dt.

https://software-dl.ti.com/processor-sdk-linux/esd/AM62X/08_06_00_42/exports/docs/linux/Foundational_Components/U-Boot/UG-Memory.html

&sdhci1 {

/* SD/MMC */

vmmc-supply = <&vdd_mmc1>;

vqmmc-supply = <&vdd_sd_dv>;

pinctrl-names = "default";

pinctrl-0 = <&main_mmc1_pins_default>;

ti,driver-strength-ohm = <50>;

disable-wp;

no-1-8-v; // disable SD card HS modes.

// NOTE::2023-05-09

// https://software-dl.ti.com/processor-sdk-linux/esd/AM62X/08_06_00_42/exports/docs/linux/Foundational_Components/U-Boot/UG-Memory.html

// Restricting to a given speed mode

//sdhci-caps-mask = <0x00000004 0x00000000>; // Limit to SDR50

//sdhci-caps-mask = <0x00000006 0x00000000>; // Limit to DDR50

sdhci-caps-mask = <0x00000007 0x00000000>; // Limit to SD HS

//sdhci-caps-mask = <0x00000007 0x00200000>; // Limit to SD legacy

};

Thanks and Best Regards,

SI.

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AM623: SD card compatibility issue