JetPack5.1.3 How to read Orin NVCIS register

Hi everyone,
I use JetPack5.13 when I read NVCIS regiser use busybox the kernel output log as below. How to read the NVCIS register.
read command is

sudo busybox devmem 0x15a11ce8

kernel log

Error: cbb-fabric@0x13a00000, irq=34
[   91.026478] **************************************
[   91.031402] CPU:0, Error:cbb-fabric, Errmon:2
[   91.035887]    Error Code            : SLAVE_ERR
[   91.039752] 
[   91.041281]    Error Code            : SLAVE_ERR
[   91.045144]    MASTER_ID             : CCPLEX
[   91.048642]    Address               : 0x15a11ce8
[   91.052319]    Cache                 : 0x0 -- Device Non-Bufferable
[   91.057514]    Protection            : 0x2 -- Unprivileged, Non-Secure, Data Access
[   91.064497]    Access_Type           : Read
[   91.067994]    Access_ID             : 0x13
[   91.067995]    Fabric                : cbb-fabric
[   91.074907]    Slave_Id              : 0x3
[   91.078051]    Burst_length          : 0x0
[   91.081548]    Burst_type            : 0x1
[   91.084872]    Beat_size             : 0x2
[   91.088102]    VQC                   : 0x0
[   91.090891]    GRPSEC                : 0x7e
[   91.093948]    FALCONSEC             : 0x0
[   91.097180]  **************************************
[   91.102223] WARNING: CPU: 0 PID: 0 at drivers/soc/tegra/cbb/tegra234-cbb.c:577 tegra234_cbb_isr+0x130/0x170
[   91.112465] ---[ end trace 518d5cf11d67a667 ]---
[   91.117298] Host read timeout at address 15a11ce8

hello kenny_234,

as you can see… there’s error reported with SLAVE_ERR.
had you enable camera (to leave it streaming) for accessing to the NVCSI register?

BTW,
please aware there’s OEM firewall, you should modify the NVCSI firewall config.
please see-also…

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