The DP output signal of the device is lost, and it cannot be recovered by cold start

Autonomous Machines Jetson & Embedded Systems Jetson Nano
1

Dear experts

I have a problem with DP output and would like an answer from the DP startup process.

In the high-temperature testing environment, the DP output signal of the device is lost, and it cannot be recovered by cold start. And the HDMI signal is normal working.

What puzzles me is that this is not a hardware problem. When I reflash the firmware of the Nano, the problem can be solved.
Is there any files will be generated during DP initialization and saved to user space or ROM on the core board ？

Below is the kernel log from the issue device.
kern.log.1 (34.6 MB)
The first time the DP is worked, after the frequent plug and pull detection, and then the screen goes black. Any subsequent startup DP is unavailable.

But when I reflash the nano board, the DP works well again.

3

Hi,

Could we just get a recent NG case log instead of a 34MB log?

4

Hi WayneWWW

This is the NG case log:
dp_issue_log.txt (226.8 KB)

thanks!

5

And those are the log of cold start since then:
Mar 10 15:26:50 gelx-desktop kernel: [ 1.053278] tegradc tegradc.0: disp0 connected to head0->/host1x/sor1
Mar 10 15:26:50 gelx-desktop kernel: [ 1.053373] display board info: id 0x0, fab 0x0
Mar 10 15:26:50 gelx-desktop kernel: [ 1.053436] generic_infoframe_type: 0x87
Mar 10 15:26:50 gelx-desktop kernel: [ 1.053455] tegra_cec 70015000.tegra_cec: cec_add_sysfs ret=0
Mar 10 15:26:50 gelx-desktop kernel: [ 1.053460] tegra_cec 70015000.tegra_cec: probed
Mar 10 15:26:50 gelx-desktop kernel: [ 1.053581] tegradc tegradc.0: DT parsed successfully
Mar 10 15:26:50 gelx-desktop kernel: [ 1.053629] tegradc tegradc.0: Display dc.ffffff800a900000 registered with id=0
Mar 10 15:26:50 gelx-desktop kernel: [ 1.061143] tegra-apbdma 60020000.dma: Tegra20 APB DMA driver register 32 channels
Mar 10 15:26:50 gelx-desktop kernel: [ 1.065498] tegradc tegradc.0: probed
Mar 10 15:26:50 gelx-desktop kernel: [ 1.066261] Console: switching to colour frame buffer device 80x30
Mar 10 15:26:50 gelx-desktop kernel: [ 1.066297] tegradc tegradc.0: fb registered
Mar 10 15:26:50 gelx-desktop kernel: [ 1.066877] tegra-adma 702e2000.adma: Tegra210 ADMA driver registered 22 channels
Mar 10 15:26:50 gelx-desktop kernel: [ 1.067883] tegradc tegradc.1: disp1 connected to head1->/host1x/sor
Mar 10 15:26:50 gelx-desktop kernel: [ 1.067966] tegradc tegradc.1: No lt-data, using default setting
Mar 10 15:26:50 gelx-desktop kernel: [ 1.068000] tegradc tegradc.1: No hpd-gpio in DT
Mar 10 15:26:50 gelx-desktop kernel: [ 1.068032] tegradc tegradc.1: DT parsed successfully
Mar 10 15:26:50 gelx-desktop kernel: [ 1.068087] tegradc tegradc.1: Display dc.ffffff800aa80000 registered with id=1
Mar 10 15:26:50 gelx-desktop kernel: [ 1.068108] tegra-fuse-burn 7000f800.efuse:efuse-burn: shutdown limit check disabled
Mar 10 15:26:50 gelx-desktop kernel: [ 1.068217] tegra-fuse-burn 7000f800.efuse:efuse-burn: Fuse burn driver initialized
Mar 10 15:26:50 gelx-desktop kernel: [ 1.068872] kfuse 7000fc00.kfuse: initialized
Mar 10 15:26:50 gelx-desktop kernel: [ 1.069636] tegradc tegradc.1: dpd enable lookup fail:-19
Mar 10 15:26:50 gelx-desktop kernel: [ 1.069913] tegra-pmc-iopower pmc-iopower: Regulator supply iopower-dbg-supply not available
Mar 10 15:26:50 gelx-desktop kernel: [ 1.070730] tegra-pmc-iopower pmc-iopower: NO_IOPOWER setting 0x0
Mar 10 15:26:50 gelx-desktop kernel: [ 1.071709] tegra-dfll-pwm 70110000.pwm: DFLL_PWM regulator is available now
Mar 10 15:26:50 gelx-desktop kernel: [ 1.071719] vdd-cpu: 708 ↔ 1322 mV at 708 mV
Mar 10 15:26:50 gelx-desktop kernel: [ 1.072144] pwm-regulator pwm_regulators:pwm-regulator@0: PWM regulator registration passed
Mar 10 15:26:50 gelx-desktop kernel: [ 1.575412] Host read timeout at address 545c00c4
Mar 10 15:26:50 gelx-desktop kernel: [ 1.576122] vdd-gpu: applied init 1000000uV constraint
Mar 10 15:26:50 gelx-desktop kernel: [ 1.576131] vdd-gpu: 708 ↔ 1323 mV at 997 mV
Mar 10 15:26:50 gelx-desktop kernel: [ 1.576513] pwm-regulator pwm_regulators:pwm-regulator@1: PWM regulator registration passed
Mar 10 15:26:50 gelx-desktop kernel: [ 1.576727] tegradc tegradc.1: probed
Mar 10 15:26:50 gelx-desktop kernel: [ 1.577038] tegradc tegradc.1: fb registered
Mar 10 15:26:50 gelx-desktop kernel: [ 1.580426] Serial: 8250/16550 driver, 4 ports, IRQ sharing disabled
Mar 10 15:26:50 gelx-desktop kernel: [ 1.580523] No Device Node present for smmu client: serial8250 !!
Mar 10 15:26:50 gelx-desktop kernel: [ 1.580531] platform serial8250: No iommus property found in DT node, got swgids from fixup(101004000)
Mar 10 15:26:50 gelx-desktop kernel: [ 1.580571] iommu: Adding device serial8250 to group 35
Mar 10 15:26:50 gelx-desktop kernel: [ 1.581255] tegradc tegradc.1: dp: irq event received, ignoring
Mar 10 15:26:50 gelx-desktop kernel: [ 1.582165] tegradc tegradc.1: dp: irq event received, ignoring
Mar 10 15:26:50 gelx-desktop kernel: [ 1.583086] 70006000.serial: ttyS0 at MMIO 0x70006000 (irq = 63, base_baud = 25500000) is a Tegra
Mar 10 15:26:50 gelx-desktop kernel: [ 1.583100] tegradc tegradc.1: dp: irq event received, ignoring
Mar 10 15:26:50 gelx-desktop kernel: [ 1.583990] 70006040.serial: ttyTHS1 at MMIO 0x70006040 (irq = 64, base_baud = 0) is a TEGRA_UART
Mar 10 15:26:50 gelx-desktop kernel: [ 1.584022] tegradc tegradc.1: dp: irq event received, ignoring
Mar 10 15:26:50 gelx-desktop kernel: [ 1.584304] serial-tegra 70006200.serial: RX in PIO mode
Mar 10 15:26:50 gelx-desktop kernel: [ 1.584391] 70006200.serial: ttyTHS2 at MMIO 0x70006200 (irq = 65, base_baud = 0) is a TEGRA_UART
Mar 10 15:26:50 gelx-desktop kernel: [ 1.584949] tegradc tegradc.1: dp: irq event received, ignoring
Mar 10 15:26:50 gelx-desktop kernel: [ 1.585406] [drm] Initialized
Mar 10 15:26:50 gelx-desktop kernel: [ 1.585876] tegradc tegradc.1: dp: irq event received, ignoring
Mar 10 15:26:50 gelx-desktop kernel: [ 1.586804] tegradc tegradc.1: dp: irq event received, ignoring
Mar 10 15:26:50 gelx-desktop kernel: [ 1.587730] tegradc tegradc.1: dp: irq event received, ignoring
Mar 10 15:26:50 gelx-desktop kernel: [ 1.588605] tegradc tegradc.1: dp: irq event received, ignoring
Mar 10 15:26:50 gelx-desktop kernel: [ 1.589820] tegradc tegradc.1: dp: irq event received, ignoring
Mar 10 15:26:50 gelx-desktop kernel: [ 1.590731] tegradc tegradc.1: dp: irq event received, ignoring
Mar 10 15:26:50 gelx-desktop kernel: [ 1.591660] tegradc tegradc.1: dp: irq event received, ignoring
Mar 10 15:26:50 gelx-desktop kernel: [ 1.592584] tegradc tegradc.1: dp: irq event received, ignoring
Mar 10 15:26:50 gelx-desktop kernel: [ 1.593509] tegradc tegradc.1: dp: irq event received, ignoring
Mar 10 15:26:50 gelx-desktop kernel: [ 1.594436] tegradc tegradc.1: dp: irq event received, ignoring
Mar 10 15:26:50 gelx-desktop kernel: [ 1.595364] tegradc tegradc.1: dp: irq event received, ignoring
Mar 10 15:26:50 gelx-desktop kernel: [ 1.596289] tegradc tegradc.1: dp: irq event received, ignoring
Mar 10 15:26:50 gelx-desktop kernel: [ 1.596442] brd: module loaded
Mar 10 15:26:50 gelx-desktop kernel: [ 1.597216] tegradc tegradc.1: dp: irq event received, ignoring
Mar 10 15:26:50 gelx-desktop kernel: [ 1.599361] tegradc tegradc.1: dp: unplug event received
Mar 10 15:26:50 gelx-desktop kernel: [ 1.599420] hpd: state 7 (Takeover from bootloader), hpd 0, pending_hpd_evt 1
Mar 10 15:26:50 gelx-desktop kernel: [ 1.599426] hpd: switching from state 7 (Takeover from bootloader) to state 0 (Reset)
Mar 10 15:26:50 gelx-desktop kernel: [ 1.599436] hpd: state 0 (Reset), hpd 0, pending_hpd_evt 0
Mar 10 15:26:50 gelx-desktop kernel: [ 1.599454] tegradc tegradc.1: blank - powerdown
Mar 10 15:26:50 gelx-desktop kernel: [ 1.599479] extcon-disp-state extcon:disp-state: cable 44 state 0 already set.
Mar 10 15:26:50 gelx-desktop kernel: [ 1.599485] Extcon DP: HPD disabled
Mar 10 15:26:50 gelx-desktop kernel: [ 1.599488] hpd: hpd_switch 0
Mar 10 15:26:50 gelx-desktop kernel: [ 1.599493] hpd: switching from state 0 (Reset) to state 1 (Check Plug)
Mar 10 15:26:50 gelx-desktop kernel: [ 1.599502] hpd: state 1 (Check Plug), hpd 0, pending_hpd_evt 0
Mar 10 15:26:50 gelx-desktop kernel: [ 1.599510] hpd: switching from state 1 (Check Plug) to state 3 (Disabled)
Mar 10 15:26:50 gelx-desktop kernel: [ 1.601929] loop: module loaded
Mar 10 15:26:50 gelx-desktop kernel: [ 1.602021] tegra_profiler: version: 1.145, samples/io: 49/28
Mar 10 15:26:50 gelx-desktop kernel: [ 1.602143] tegra_profiler: auth: init
Mar 10 15:26:50 gelx-desktop kernel: [ 1.603449] THERMAL EST: found 2 subdevs
Mar 10 15:26:50 gelx-desktop kernel: [ 1.603461] THERMAL EST num_resources: 0
Mar 10 15:26:50 gelx-desktop kernel: [ 1.603468] [THERMAL EST subdev 0]
Mar 10 15:26:50 gelx-desktop kernel: [ 1.603477] [THERMAL EST subdev 1]
Mar 10 15:26:50 gelx-desktop kernel: [ 1.603929] thermal thermal_zone5: Registering thermal zone thermal_zone5 for type thermal-fan-est
Mar 10 15:26:50 gelx-desktop kernel: [ 1.603933] THERMAL EST: thz register success.
Mar 10 15:26:50 gelx-desktop kernel: [ 1.604088] THERMAL EST: end of probe, return err: 0
Mar 10 15:26:50 gelx-desktop kernel: [ 1.605372] sd: No Scsi addr parsed to reserve index
Mar 10 15:26:50 gelx-desktop kernel: [ 1.605414] hisi_sas: driver version v1.6
Mar 10 15:26:50 gelx-desktop kernel: [ 1.606300] tegradc tegradc.1: nominal-pclk:148500000 parent:148500000 div:1.0 pclk:148500000 147015000~161865000
Mar 10 15:26:50 gelx-desktop kernel: [ 1.606390] tegradc tegradc.1: dp: HPD is not detected
Mar 10 15:26:50 gelx-desktop kernel: [ 1.606433] tegradc tegradc.1: dp: Failed to write DPCD data. CMD 0x600, Status 0x0
Mar 10 15:26:50 gelx-desktop kernel: [ 1.606459] tegradc tegradc.1: dp: HPD is not detected
Mar 10 15:26:50 gelx-desktop kernel: [ 1.606474] tegradc tegradc.1: dp: Failed to write DPCD data. CMD 0x600, Status 0x0
Mar 10 15:26:50 gelx-desktop kernel: [ 1.606498] tegradc tegradc.1: dp: HPD is not detected
Mar 10 15:26:50 gelx-desktop kernel: [ 1.606510] tegradc tegradc.1: dp: Failed to write DPCD data. CMD 0x600, Status 0x0
Mar 10 15:26:50 gelx-desktop kernel: [ 1.606532] tegradc tegradc.1: dp: HPD is not detected
Mar 10 15:26:50 gelx-desktop kernel: [ 1.606544] tegradc tegradc.1: dp: Failed to write DPCD data. CMD 0x600, Status 0x0
Mar 10 15:26:50 gelx-desktop kernel: [ 1.606558] tegradc tegradc.1: dp: failed to exit panel power save mode (0xfffffff2)
Mar 10 15:26:50 gelx-desktop kernel: [ 1.607026] hpd: state 3 (Disabled), hpd 0, pending_hpd_evt 1
Mar 10 15:26:50 gelx-desktop kernel: [ 1.607033] hpd: switching from state 3 (Disabled) to state 0 (Reset)
Mar 10 15:26:50 gelx-desktop kernel: [ 1.607045] hpd: state 0 (Reset), hpd 0, pending_hpd_evt 0
Mar 10 15:26:50 gelx-desktop kernel: [ 1.607060] tegradc tegradc.1: blank - powerdown

6

Hi,

Could we confirm if this is the behavior that always happened when this error occurred?

I notice there is plug and unplug event happened at same time

Mar 9 15:36:44 gelx-desktop kernel: [ 4088.345578] tegradc tegradc.1: dp: plug event received
Mar 9 15:36:44 gelx-desktop kernel: [ 4088.492280] tegradc tegradc.1: dp: unplug event received

Is this still on NV devkit?

7

We didn’t actually plug in or unplug any interface, it only happened at that time, and it lasted for a while and then it stopped.
When this event occurs, DP has no signal output.

8

Ok, so is this still on NV devkit or your custom board?

How to reproduce this error?

9

We use it on our custom board. We can’t repeat the problem.
At first we thought it was a hardware problem, so we replaced the carrier board and the problem persisted.

When I reflash the nano firmware, this problem no longer exists.

10

Hi,

I think you could try to use devkit and find out how to reproduce this issue first.

11

What puzzles me is that this is not a hardware problem. When I reflash the firmware of the Nano, the problem can be solved.
Is there any files will be generated during DP initialization and saved to user space or ROM on the core board ？

12

Nope.