<6>agi2c: calling REAL amdgpu_i2c_create(dev, rec, "DF4961-probe")
<6>agi2c: chan=0xfffff8008de6f580 adapter.name='AMDGPU i2c bit bus DF4961-probe'
<6>agi2c: adapter.algo=0xffffffff826025a0 (== &i2c_bit_algo: YES - bit bus) master_xfer=0xffffffff82600d10
<6>agi2c: adapter.lock_ops=0  <- i2c_transfer() needs this non-NULL
<6>agi2c: lock_ops == NULL: i2c_transfer() will call (NULL)->lock_bus() -> NULL function pointer -> PANIC
<6>agi2c: FIRING - REAL amdgpu_i2c_router_select_ddc_port(&fconn)...
Fatal user address access from kernel mode from kldload at ffffffff82600e7b


Fatal trap 12: page fault while in kernel mode
cpuid = 0; lapic id = 0
fault virtual address	= 0x0
fault code		= supervisor read data, page not present
instruction pointer	= 0x8:0xffffffff82600e7b
stack pointer	        = 0x10:0xfffff801186f5758
frame pointer	        = 0x10:0xfffff801186f5778
code segment		= base 0x0, limit 0xfffff, type 0x1b
			= DPL 0, pres 1, long 0, def32 0, gran 1
processor eflags	= interrupt enabled, resume, IOPL = 0
current process		= 1199
current thread          = pri 6 
kernel: type 12 trap, code=0

CPU0 stopping CPUs: 0x0000003e
 stopped
Stopped at      i2c_transfer+0x2b:      movq    (%rax),%rax
db>