TDA4VM: Disable automatic mount EMMC partition 0.

Pierre Hsieh

Intellectual 955 points

Part Number: TDA4VM

Hi Sir :

I want to disable automatic mount EMMC partition 0 to /run/media/mmcblk0p1.

How should I set it?

PSDK version 7.3.0

over 4 years ago

0 Keerthy J over 4 years ago

TI__Guru**** 155140 points

Hi,

Can you try disabling the main_sdhci0 node from the kernel dts?

Something like below:

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diff --git a/arch/arm64/boot/dts/ti/k3-j721e-common-proc-board.dts b/arch/arm64/boot/dts/ti/k3-j721e-common-proc-board.dts
index d1a2eb415..ae8b0e6b1 100644
--- a/arch/arm64/boot/dts/ti/k3-j721e-common-proc-board.dts
+++ b/arch/arm64/boot/dts/ti/k3-j721e-common-proc-board.dts
@@ -771,6 +771,7 @@
        non-removable;
        ti,driver-strength-ohm = <50>;
        disable-wp;
+       status = "disabled";
 };
 &main_sdhci1 {
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

diff --git a/arch/arm64/boot/dts/ti/k3-j721e-common-proc-board.dts b/arch/arm64/boot/dts/ti/k3-j721e-common-proc-board.dts
index d1a2eb415..ae8b0e6b1 100644
--- a/arch/arm64/boot/dts/ti/k3-j721e-common-proc-board.dts
+++ b/arch/arm64/boot/dts/ti/k3-j721e-common-proc-board.dts
@@ -771,6 +771,7 @@
        non-removable;
        ti,driver-strength-ohm = <50>;
        disable-wp;
+       status = "disabled";
 };

 &main_sdhci1 {

Best Regards,
Keerthy

0 Pierre Hsieh over 4 years ago in reply to Keerthy J

Intellectual 955 points

Hi Keerthy:

The root file system of eMMC will not be available.

0 Keerthy J over 4 years ago in reply to Pierre Hsieh

TI__Guru**** 155140 points

Hi,

Then you are using filesystem in eMMC? Typically SD is used as file system.

Can you try:

env default -a
saveenv

in the u-boot prompt so that MMC-SD is used as the default file system?

Best Regards,
Keerthy

0 Pierre Hsieh over 4 years ago in reply to Keerthy J

Intellectual 955 points

Hi Keerthy:

Currently TDA4VM needs to use fast boot , so SD Card will not be used.

Optimized flow involve SBL -> A72 ATF/OPTEE -> A72 Linux Kernel

Use Device : OSPI Flash and eMMC

0 Keerthy J over 4 years ago in reply to Pierre Hsieh

TI__Guru**** 155140 points

Hi Pierre,

Then you need eMMC for file system then what is that you want to achieve?

Pierre Hsieh said:
I want to disable automatic mount EMMC partition 0 to /run/media/mmcblk0p1.

This is the partition where we have the file system then why do you want to disable?

- Keerthy

0 Pierre Hsieh over 4 years ago in reply to Keerthy J

Intellectual 955 points

Hi Keerthy:

Currently I need TDA4VM to fast boot, but I don't need to auto-mount "/dev/mmcblk0p1".

I will mount it after the App access.

0 Keerthy J over 4 years ago in reply to Pierre Hsieh

TI__Guru**** 155140 points

Hi Pierre,

Without getting to Linux command prompt how are you loading the App?
Some sort of command line is needed isn't it?

- Keerthy

+1 Pierre Hsieh over 4 years ago in reply to Keerthy J

Intellectual 955 points

Hi Keerthy:

I modify udev settings to disable automount.

Processors

Processors forum

TDA4VM: Disable automatic mount EMMC partition 0.