Jetson Xavier NX Production module, SDMMC3, boot looping when insert SD Card

karoot · May 17, 2021, 9:13am

Hi all,
I have designed a custom carrier board for Jetson Xavier NX (production version) with external SD card supported.

I modify dtbs file to enable smmc3:
sdmmc3: sdhci@3440000 {
mmc-ocr-mask = <0x0>;
// cd-inverted; // our cd-pin not inverted
cd-gpios = <&tegra_main_gpio TEGRA194_MAIN_GPIO(Q, 1) 1>;
nvidia,cd-wakeup-capable;
nvidia,vmmc-always-on;
mmc-ocr-mask = <0>;
// cd-inverted;
vmmc-supply = <&p3668_vdd_sdmmc1_sw>;
status = “okay”;
};

When i insert the SD card, my Jetson freeze and reboot after servaral seconds. After, the Jetson can not boot successful until i reject the SD card.

Please help me to check dmes file and give me some advise.
dmes.txt (14.8 KB)

WayneWWW · May 17, 2021, 10:07am

Please dump the log from uart.

karoot · May 17, 2021, 10:26am

Hi Wayne,
dmes.txt (14.8 KB)

this file was output from console port when i insert the SD card.
How can i dump the log file as you expect?

WayneWWW · May 17, 2021, 11:06am

Hi,

Sorry, my fault. Your log is already from the uart. Could you also dump the full dmesg?

The problem is generally we don’t see cpu error when sdcard is inserted. No other users who enable sdmmc3 sdcard slot have this problem.

I think it is either due to the vmmc-supply or the cd-gpios. Are you using TEGRA194_MAIN_GPIO(G, 2) on your board for vmmc-supply?

karoot · May 18, 2021, 1:15am

Hi Wayne,
Pls check the log file.
dmes.txt (278.8 KB)

Here is my dtsi for sdmmc3:
/** adding external SD card **/
sdmmc3: sdhci@3440000 {
mmc-ocr-mask = <0x0>;
// cd-inverted;
cd-gpios = <&tegra_main_gpio TEGRA194_MAIN_GPIO(Q, 1) 1>;
nvidia,cd-wakeup-capable;
nvidia,vmmc-always-on;
mmc-ocr-mask = <0>;
// cd-inverted;
vmmc-supply = <&p3668_vdd_sdmmc1_sw>;
status = “okay”;
};
I don’t use TEGRA194_MAIN_GPIO(G, 2) for vmmc-supply, i use directly 3.3V and my cd-gpio is not inverted, so i comment cd-inverted.

WayneWWW · May 18, 2021, 2:29am

Then please set your vmmc-supply to battery_reg. p3668_vdd_sdmmc1_sw is using GPIO(G,2). And does not match your board design.

karoot · May 18, 2021, 3:13am

Hi Wayne,

I changed vmmc-supply tp battery_reg.
sdmmc3: sdhci@3440000 {
mmc-ocr-mask = <0x0>;
// cd-inverted;
cd-gpios = <&tegra_main_gpio TEGRA194_MAIN_GPIO(Q, 1) 1>;
nvidia,cd-wakeup-capable;
nvidia,vmmc-always-on;
mmc-ocr-mask = <0>;
// cd-inverted;

	// vmmc-supply = <&p3668_vdd_sdmmc1_sw>;
	vmmc-supply = <&battery_reg>;
	status = "okay";
};

But my Jetson still freeze and reboot after that. It can not complete boot until i reject the SD card.
Here is log
dmes.txt (64.5 KB)

WayneWWW · May 18, 2021, 3:37am

Hi,

I am just curious, is your cd gpio a active-low design?
Could you also paste the error log when error happens?
Could you paste the full dts?

karoot · May 18, 2021, 3:55am

Hi Wayne,

My cd-gpio is active-high design, so i use tegra_main_gpio TEGRA194_MAIN_GPIO(Q, 1)
Log file when i insert SD card
dmes.txt (14.8 KB)
My dts, where i insert sdmmc3 support
tegra194-p3668-common.dtsi (11.3 KB)

WayneWWW · May 18, 2021, 3:59am

My cd-gpio is active-high design, so i use tegra_main_gpio TEGRA194_MAIN_GPIO(Q, 1)

But the “1” in your second field of cd-gpios means active low.

cd-gpios = <&tegra_main_gpio TEGRA194_MAIN_GPIO(Q, 1) 1>;

This is the definition from kerenl.
define GPIO_ACTIVE_HIGH 0
define GPIO_ACTIVE_LOW 1

karoot · May 18, 2021, 4:23am

Hi Wayne,

I changed
cd-gpios = <&tegra_main_gpio TEGRA194_MAIN_GPIO(Q, 1) GPIO_ACTIVE_HIGH>;

When i insert SD card, my Jetson looks like not detect SD card and no reboot anymore.
In dmesg, i see an error sdhci-tegra 3440000.sdhci: could not set regulator OCR (-22)
dmesg.txt (68.8 KB)

My hardware design for you ref

WayneWWW · May 18, 2021, 4:38am

Could you concert your dtb back to dts and share it here? What you’ve shared is not the full dts.

karoot · May 18, 2021, 5:07am

Hi Wayne,

dtc -I dtb -O dts -o extracted.dts /boot/tegra194-p3668-all-p3509-0000.dtb
extracted.dts (238.0 KB)

WayneWWW · May 18, 2021, 6:46am

Hi,

Sorry, my fault again. For the OCR issue, it is because we feed a regulator that is 5V. Though battery_reg is a dummy regulator, it is still labeled as 5V.

Thus, please pick up one dummy regulator that has 3v3.

For example, hdr40_vdd_3v3: p3509_vdd_3v3_cvb.

karoot · May 18, 2021, 8:35am

Hi Wayne,

I changed vmmc-supply to hdr40_vdd_3v3

sdmmc3: sdhci@3440000 {
mmc-ocr-mask = <0x0>;
// cd-inverted;
cd-gpios = <&tegra_main_gpio TEGRA194_MAIN_GPIO(Q, 1) GPIO_ACTIVE_HIGH>;
nvidia,cd-wakeup-capable;
nvidia,vmmc-always-on;
mmc-ocr-mask = <0>;
// cd-inverted;
// vmmc-supply = <&p3668_vdd_sdmmc1_sw>;
vmmc-supply = <&hdr401_vdd_3v3>;
status = “okay”;
};

Now my Jetson looks like not detect SD card plugin
dmesg.txt (64.1 KB)

I have probed the cd-gpio by VOM, when no SD card, it is 0V and when SD card pluged, it is 3.3V, but no output from debug port.

WayneWWW · May 18, 2021, 8:44am

One more thing here. Your dts still has one cd-inverted under sdhci@3440000.

	clock-names = "sdmmc", "pll_p", "sdmmc_legacy_tm";
	iommus = <0x11 0x18>;
	nvidia,en-periodic-calib;
	mmc-ocr-mask = <0x3>;
	nvidia,vmmc-always-on;
	cd-inverted;
	cd-gpios = <0x16 0x9c 0x0>;
	status = "okay";
	vqmmc-supply = <0x17>;
	vmmc-supply = <0x13>;
	linux,phandle = <0xc1>;
	phandle = <0xc1>;

karoot · May 18, 2021, 8:58am

Hi Wayne,

I can not find cd-inverted; in my dts.
Pls check my dts here
extracted.dts (238.0 KB)

WayneWWW · May 18, 2021, 9:01am

Oh, ok. Sorry that I have 20 files all named extracted.dts in my directory.

Are you sure your board design is really a active-high one? I guess if you change it back to active-low and insert the card, you will see the tuning start.

karoot · May 19, 2021, 2:30am

Hi Wayne

I try to change cd-gpio to another pin but nothing change.

sdmmc3: sdhci@3440000 {
mmc-ocr-mask = <0x0>;
cd-inverted;
cd-gpios = <&tegra_main_gpio TEGRA194_MAIN_GPIO(Q, 1) GPIO_ACTIVE_HIGH>;
// cd-gpios = <&tegra_main_gpio TEGRA194_MAIN_GPIO(Q, 2) GPIO_ACTIVE_LOW>;
nvidia,cd-wakeup-capable;
nvidia,vmmc-always-on;
mmc-ocr-mask = <0>;
cd-inverted;
// vmmc-supply = <&p3668_vdd_sdmmc1_sw>;
vmmc-supply = <&p3509_vdd_3v3_cvb>;
status = “okay”;
};

My cd-gpio pin logic signal:

sd card insterted: 3.3V
no sd card: 0V

When i set “wrong cd-gpio”, my Jetson can not detect SD card and boot normally
But when i correct the cd-gpio pin setup, the SD card was detected and my Jetson can not boot.

So i think the problem come from my dts setup or anything else.
Pls see the dmesg and dts below
duong_extracted.dts (238.0 KB)
duong_dmesg_no_sdcard.txt (64.1 KB)
duong_dmesg_boot_with_sdcard.txt (63.6 KB)

WayneWWW · May 19, 2021, 2:33am

So it looks like you board design is not active high one. Please let your hardware engineer to review it again.
It it not very common to see CPU error when configuring sdcard. Do you have other NX module to replicated this steps and see do you have cpu errors?