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TDA4VM: CPSW9G don't work when set the loglevel=0 in kernel args.

Part Number: TDA4VM

Hi, 

    I  change the uboot code as below,  the interface of cpsw9g don't work. log attached.  it seems timeing issue. could you please give me suggestion to trace it?

by the way,  if I try to use ifconfig, shell will be broken (ctrl+c or ctrl +z are no used), 

use cmd "ifconfig &" ,   the shell can work. 

--- a/board-support/u-boot-2020.01+gitAUTOINC+3c9ebdb87d-g3c9ebdb87d/include/environment/ti/mmc.h
+++ b/board-support/u-boot-2020.01+gitAUTOINC+3c9ebdb87d-g3c9ebdb87d/include/environment/ti/mmc.h
@@ -10,7 +10,7 @@

#define DEFAULT_MMC_TI_ARGS \
"mmcdev=0\0" \
- "mmcrootfstype=ext4 rootwait loglevel=0 \0" \
+ "mmcrootfstype=ext4 rootwait\0" \
"finduuid=part uuid mmc ${bootpart} uuid\0" \
"args_mmc=run finduuid;setenv bootargs console=${console} " \
"${optargs} " \

log:

7823.normal_nodelay_loglevel0_dmesg.log