Head1::vdd_hdmi_5v0-supply configuration is ovveride by head0::vdd_hdmi_5v0-supply

Autonomous Machines Jetson & Embedded Systems Jetson AGX Xavier
22

So please share the full dts.

23

Hi,

Please review the dts if do you find anything?

tegra194-p2888-0001-p2822-0000.dts (321.6 KB)

24

I just had a quick check but didn’t see any obvious error.

Can you give me the dmesg for each case?

  1. enable both nvdisplay

  2. enable only first head

  3. enable only the second head

BTW, what is the case for your previous log?

25

Hi
Please review all dts files.

During the test we encounter a strange behavior which was that if all screens were disable SOR0 send an image (nvidia logo during startup) even when the HDMI enable was inactive.

bothDisable (58.8 KB)
sor2Active0Disable (66.1 KB)
bothActive (67.3 KB)
sor0Active2Disable (66.2 KB)

26

That has nothing strange. The boot logo is controlled by the bootloader but not kernel.

28

Hi,

What are the hpd gpio that assigned to each display head?

Also, may I know why did you mention DVI 0 in this debug log? Are you using a DVI monitor to test?

[ 3.560942] Kaka tegra_hdmi_is_connected DVI 0
[ 3.560949] Camero forcing to dvi only!!!

I think the problem is the HPD here somehow gets disabled and the sor0 won’t enable the display.

[ 3.561357] extcon-disp-state external-connection:disp-state: cable 48 state 0
[ 3.561359] Extcon AUX2(HDMI) disable

29

Hi,
[ 3.560942] Kaka tegra_hdmi_is_connected DVI 0
[ 3.560949] Camero forcing to dvi only!!!

Are for debug purpose only and in the past there was force dvi during debug process but only prnt was left by mistake.

For the second thing do you have any idea how can I debug it?
[ 3.561357] extcon-disp-state external-connection:disp-state: cable 48 state 0
[ 3.561359] Extcon AUX2(HDMI) disable

30

Yes but why there is Illegal hdmi image display when both displays are disable.
The illegal output we verified by using quantum 780

31

Yes but why there is Illegal hdmi image display when both displays are disable.
The illegal output we verified by using quantum 780

No need to worry about it. This will be gone after you do a full flash.

For the second thing do you have any idea how can I debug it?
[ 3.561357] extcon-disp-state external-connection:disp-state: cable 48 state 0
[ 3.561359] Extcon AUX2(HDMI) disable

Can you reply my question first? What are the hpg gpio in use here?

Also, for these two GPIOs, did you ever change their pinmux setting?

32

Hi

When both displays were active the is:

[    3.412444] extcon-disp-state external-connection:disp-state: cable 48 state 1
[    3.412449] Extcon AUX2(HDMI) enable

according to the pinmux:
Jetson_AGX_Series_DevKit_Pinmux_Configuration_TemplateX1000_SOM1Debug.xlsx (955.3 KB)

33

I don’t know what you try to say here.

You already shared both-active log and in the end this extcon will be disabled. Read your log again and you will find it out…

Also, please just tell me what is your gpio for hpd that you write in your device tree.

34

Sorry my mistake :(
At pinmux
DP_AUX_CH1_HPD is inactive (according to oure scheme)
while
DP_AUX_CH0_HPD and DP_AUX_CH2_HPD are enable and configure as hpd

35

Please set the vdd regulator as always-on and see if this can make sure both HDMI work.

36

When I set regulators to next configuration both displays are active:


		p2822_vdd_hdmi2_5v0: regulator@106 {
			compatible = "regulator-fixed";
			reg = <106>;
			regulator-name = "vdd-hdmi2-5v0";
			regulator-min-microvolt = <5000000>;
			regulator-max-microvolt = <5000000>;
			gpio = <&tegra_main_gpio TEGRA194_MAIN_GPIO(A, 0) 0>;
      regulator-alway-on;
			//enable-active-high;
		};


		p2822_vdd_hdmi_5v0: regulator@112 {
			compatible = "regulator-fixed";
			reg = <112>;
			regulator-name = "vdd-hdmi-5v0";
			regulator-min-microvolt = <5000000>;
			regulator-max-microvolt = <5000000>;
			gpio = <&tegra_main_gpio TEGRA194_MAIN_GPIO(A, 3) 0>;
			enable-active-high;
		};