# ifconfig eth0 down
[  426.619409] macb ff0c0000.ethernet eth0: Link is Down
[  426.624754] 
[  426.624754] Phy interrupt config_intr else condition in dp83869_config_intr: Micr_value:0
[  426.627848] 
[  426.627848] dp83869_handle_interrupt: IRQ handled, triggering PHY machine,irq_status:1024
[  426.634518] 
[  426.634518] Interrupt occured reading MII_DP83869_ISR : 0
[  426.644125] 
[  426.644125] dp83869_handle_interrupt: link=0 speed=1000 duplex=1
[  426.663912] macb ff0c0000.ethernet: gem-ptp-timer ptp clock unregistered.
# ifconfig eth0 up  
[  455.596841] 
[  455.596841] Enable Interrupt output INT_OE in CFG4 register in dp83869_config_init 
[  455.606152] 
[  455.606152] DP83869_CFG4 bit7:1
[  455.611960] 
[  455.611960] Enable Interrupt output INT_OE in CFG4 register in dp83869_config_init 
[  455.621267] 
[  455.621267] DP83869_CFG4 bit7:1
[  455.626598] 
[  455.626598] Phy interrupt config_intr else condition in dp83869_config_intr: Micr_value:0
[  455.636366] 
[  455.636366] Interrupt occured reading MII_DP83869_ISR : 0
[  455.643332] macb ff0c0000.ethernet eth0: PHY [ff0c0000.ethernet-ffffffff:01] driver [TI DP83869] (irq=52)
[  455.654415] 
[  455.654415] Phy interrupt enabled if condition in dp83869_config_intr
[  455.662426] 
[  455.662426] Interrupt occured reading MII_DP83869_ISR : 0
[  455.669375] 
[  455.669375] MICR value default:0, dp83869_config_intr
[  455.675986] 
[  455.675986] MICR value:1024, dp83869_config_intr
[  455.682108] macb ff0c0000.ethernet eth0: configuring for phy/rgmii-id link mode
[  455.689881] pps pps0: new PPS source ptp0
[  455.694583] macb ff0c0000.ethernet: gem-ptp-timer ptp clock registered.
# cat /proc/interrupts | grep "zynq-gpio"
 52:     200004          0          0          0  zynq-gpio  78 Level     ff0c0000.ethernet-ffffffff:01
# cat /proc/interrupts | grep "zynq-gpio"
 52:     200004          0          0          0  zynq-gpio  78 Level     ff0c0000.ethernet-ffffffff:01
# [  458.463980] 
[  458.463980] dp83869_handle_interrupt: IRQ handled, triggering PHY machine,irq_status:7232
[  458.473673] 
[  458.473673] dp83869_handle_interrupt: link=0 speed=-1 duplex=255

# cat /proc/interrupts | grep "zynq-gpio"
 52:     238723          0          0          0  zynq-gpio  78 Level     ff0c0000.ethernet-ffffffff:01
# cat /proc/interrupts | grep "zynq-gpio"
 52:     260231          0          0          0  zynq-gpio  78 Level     ff0c0000.ethernet-ffffffff:01
# [  468.112202] irq 52: nobody cared (try booting with the "irqpoll" option)
[  468.118915] CPU: 0 PID: 796 Comm: irq/52-ff0c0000 Not tainted 6.6.40-xilinx-ge8e854f06cab #1
[  468.127356] Hardware name: xlnx,zynqmp (DT)
[  468.131532] Call trace:
[  468.133971]  dump_backtrace+0x90/0xe8
[  468.137642]  show_stack+0x18/0x24
[  468.140957]  dump_stack_lvl+0x48/0x60
[  468.144620]  dump_stack+0x18/0x24
[  468.147936]  __report_bad_irq+0x38/0x120
[  468.151859]  note_interrupt+0x310/0x360
[  468.155696]  handle_irq_event+0xd8/0xe8
[  468.159533]  handle_fasteoi_irq+0xb0/0x284
[  468.163629]  generic_handle_domain_irq+0x2c/0x44
[  468.168256]  zynq_gpio_irqhandler+0xa0/0x16c
[  468.172526]  generic_handle_domain_irq+0x2c/0x44
[  468.177153]  gic_handle_irq+0x6c/0x9c
[  468.180816]  call_on_irq_stack+0x24/0x4c
[  468.184739]  do_interrupt_handler+0x80/0x84
[  468.188923]  el1_interrupt+0x34/0x54
[  468.192499]  el1h_64_irq_handler+0x18/0x24
[  468.196596]  el1h_64_irq+0x64/0x68
[  468.199999]  irq_finalize_oneshot.part.0+0x80/0x150
[  468.204877]  irq_thread_fn+0x60/0xa8
[  468.208453]  irq_thread+0x170/0x294
[  468.211942]  kthread+0xe0/0xe4
[  468.214998]  ret_from_fork+0x10/0x20
[  468.218575] handlers:
[  468.220839] [<00000000c7f40757>] irq_default_primary_handler threaded [<0000000078af64fc>] phy_interrupt
[  468.230344] Disabling IRQ #52
[  468.235635] macb ff0c0000.ethernet eth0: Link is Up - 1Gbps/Full - flow control off

Broadcast message from systemd-journald@zynqmp (Tue 2024-02-27 09:33:40 PST):

kernel[687]: [  468.230344] Disabling IRQ #52


# #CABLE DISCONNECT
# [  481.335816] 
[  481.335816] dp83869_handle_interrupt: IRQ handled, triggering PHY machine,irq_status:1284
[  481.345506] 
[  481.345506] dp83869_handle_interrupt: link=1 speed=1000 duplex=1
[  481.353370] macb ff0c0000.ethernet eth0: Link is Down

# cat /proc/interrupts | grep "zynq-gpio"
 52:     300006          0          0          0  zynq-gpio  78 Level     ff0c0000.ethernet-ffffffff:01
# cat /proc/interrupts | grep "zynq-gpio"
 52:     300006          0          0          0  zynq-gpio  78 Level     ff0c0000.ethernet-ffffffff:01
# #CABLE CONNECT
# [  498.079813] 
[  498.079813] dp83869_handle_interrupt: IRQ handled, triggering PHY machine,irq_status:3072
[  498.089501] 
[  498.089501] dp83869_handle_interrupt: link=0 speed=1000 duplex=1
[  498.097782] macb ff0c0000.ethernet eth0: Link is Up - 1Gbps/Full - flow control off

# cat /proc/interrupts | grep "zynq-gpio"
 52:     300006          0          0          0  zynq-gpio  78 Level     ff0c0000.ethernet-ffffffff:01
# cat /proc/interrupts | grep "zynq-gpio"
 52:     300006          0          0          0  zynq-gpio  78 Level     ff0c0000.ethernet-ffffffff:01