AM625: SPL: U-boot: ext4 file system support?

Gireesh Hiremath

Part Number: AM625

Tool/software:

Hi,

I am trying to access the splash screen image file from the rootfs (ext4 ) in the u-boot SPL stage and getting below error

Unrecognized filesystem type
Error: could not access mmc storage.
Error: could not access storage splash_select_fs_dev

and enabled CONFIG_SPL_FS_EXT4=y in defconfig

added below one in struct splash_location default_splash_locations[] of board file

        {
                .name           = "mmc",
                .storage        = SPLASH_STORAGE_MMC,
                .flags          = SPLASH_STORAGE_FS,
                .devpart        = "0:1",
        },

is ext4 file system supported in spl stage?

Regards,

Gireesh Hiremath

2 days ago

0 Krunal Bhargav34 1 day ago

TI__Mastermind 40985 points

Hi,

Let me check and get back to you.

Regards,
Krunal

0 Devarsh Thakkar 1 day ago

TI__Prodigy 130 points

Hi @Gireesh,

The mmc EXT4 partition is at 1:2 as shared in below command logs:

=> mmc dev 1
switch to partitions #0, OK
mmc1 is current device
=> mmc part

Partition Map for MMC device 1 --   Partition Type: DOS

Part    Start Sector    Num Sectors     UUID            Type
1     2048            262144          076c4a2a-01     0c Boot
2     264192          18444080        076c4a2a-02     83

So you should set .devpart in default_splash_locations struct to "1:2."

Regards

Devarsh

0 Gireesh Hiremath 1 day ago in reply to Devarsh Thakkar

Intellectual 335 points

Hi Devarsh,

I am trying on custom board, boots only from eMMC,

where the u-boot images are written directly on raw space, only one partition where the rootfs is extracted.

at u-boot stage ext4 file system support is working. but my concern is ext4 file support at SPL stage ?

so that I can display my splash screen 2 second early.

Regards,

Gireesh Hiremath

0 Devarsh Thakkar 1 day ago in reply to Gireesh Hiremath

TI__Prodigy 130 points

/cfs-file/__key/communityserver-discussions-components-files/791/0001_2D00_am62px_2D00_Use_2D00_EXT4_2D00_partition_2D00_to_2D00_load_2D00_splash_2D00_image.patch

Yes, the SPL stage supports EXT4 partition. We verified A53 splash screen loading from EXT4 partition (at /) using above patch (w.r.t ti-u-boot).

0 Gireesh Hiremath 1 hour ago in reply to Devarsh Thakkar

Intellectual 335 points

Hi Devash,

Thanks, I check.

Regards,

Gireesh Hiremath

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AM625: SPL: U-boot: ext4 file system support?