Notice CMD52 timeout not letting the SD bus to be idle

VIM3
1

Which system do you use? Android, Ubuntu, OOWOW or others?

Ubuntu

Which version of system do you use? Please provide the version of the system here:

`5.15 kernel

Please describe your issue below:

Notice CMD52 timeout not letting the SD bus to be idle

Post a console log of your issue below:


[ 3790.594912] meson-gx-mmc ffe05000.sd: 52 [0xa00], TIMEOUT[0x2800]
2

Hi @yash1234

Do you have issues due to this?

Regards,
Nick

3

Yes.. this doesn’t let bus to be idle.
Any option to disable the CMD52 timeout?

4

Hi @yash1234,

Which image you used? Could you check the latest release 1.7.4? And which SD card you used?

Regards,
Nick

5

root@Khadas:/home/khadas/non_debug# uname -a
Linux Khadas 5.15.137 #1.7.3 SMP PREEMPT Fri Mar 28 00:53:57 IST 2025 aarch64 aarch64 aarch64 GNU/Linux

The image is on EMMC and My wifi chip is connected over SD card slot.

6

Hi @yash1234,

Could you try this patch?

diff --git a/arch/arm64/boot/dts/amlogic/kvim3.dts b/arch/arm64/boot/dts/amlogic/kvim3.dts
index 41714c38e..1f0830c9f 100644
--- a/arch/arm64/boot/dts/amlogic/kvim3.dts
+++ b/arch/arm64/boot/dts/amlogic/kvim3.dts
@@ -1484,6 +1484,9 @@
        //vmmc-supply = <&vddao3v3_reg>;
        //vqmmc-supply = <&vddio_c>;
        status = "okay";
+       no-mmc;
+       no-sd;
+       card_type = <3>;
        pinctrl-0 = <&sdcard_pins>;
        pinctrl-1 = <&sdcard_clk_gate_pins>;
        pinctrl-2 = <&sd_1bit_pins>;

Regards,
Nick

7

Thanks Nick.
Adding the patch,would disable the SDIO card detection. Below is the snap of dts file used

&sd_emmc_b {
        status = "okay";
        pinctrl-0 = <&sdcard_pins>;
       pinctrl-1 = <&sdcard_clk_gate_pins>;
       pinctrl-2 = <&sd_1bit_pins>;
        pinctrl-names = "sd_default",
                                "clk-gate",
                               "sd_1bit_pins";
                                bus-width = <4>;
                                cap-sd-highspeed;
                                max-frequency = <40000000>;
                                  disable-wp;
                                dat1-gpios = <&gpio GPIOC_1 GPIO_ACTIVE_HIGH>;
                                cd-gpios = <&gpio GPIOC_6 GPIO_ACTIVE_HIGH>;
                                clk-always-on;
                                 vmmc-supply = <&vddao3v3_reg>;
                                 vqmmc-supply = <&vcc1v8_reg>;
                                wakeup-source;
};
8

Hi @yash1234,

Not sure about this, we can’t check on our side, could you share us which device you used?

Regards,
Nick