HDMI display not working with DELL

[sujit.kumar]

Hi,

I have my own custom board, I am able to bring up but display not working with DELL monitor. When I connect with VU tv I can see display but with lots of flickering.

Here is my schematic and kernel log when I plug hdmi :

Schematic:

[ 106.124655] edid invalid
[ 106.268200] edid invalid
[ 106.403059] tegradc 15200000.display: blank - powerdown
[ 106.403979] tegradc 15200000.display: unblank
[ 106.407909] tegra_nvdisp_handle_pd_enable: Unpowergated Head0 pd
[ 106.408459] tegra_nvdisp_handle_pd_enable: Unpowergated Head1 pd
[ 106.425429] tegradc 15200000.display: hdmi: tmds rate:148500K prod-setting:prod_c_hdmi_111m_223m
[ 106.427269] tegradc 15200000.display: hdmi: get YCC quant from EDID.
[ 106.431269] extcon-disp-state external-connection:disp-state: cable 47 state 1
[ 106.431276] Extcon AUX1(HDMI) enable
[ 106.444066] tegradc 15200000.display: sync windows ret = 247
[ 106.444153] extcon-disp-state external-connection:disp-state: cable 53 state 1
[ 106.444159] Extcon HDMI: HPD enabled
[ 106.444166] tegradc 15200000.display: hdmi: plugged
[ 106.447838] tegradc 15200000.display: blank - powerdown
[ 106.510945] extcon-disp-state external-connection:disp-state: cable 47 state 0
[ 106.510951] Extcon AUX1(HDMI) disable
[ 106.534885] tegra_nvdisp_handle_pd_disable: Powergated Head1 pd
[ 106.535980] tegra_nvdisp_handle_pd_disable: Powergated Head0 pd
[ 106.536095] tegradc 15210000.display: blank - powerdown
[ 106.581936] tegradc 15200000.display: blank - powerdown
[ 106.581966] tegradc 15200000.display: unblank
[ 106.583381] tegra_nvdisp_handle_pd_enable: Unpowergated Head0 pd
[ 106.583587] tegra_nvdisp_handle_pd_enable: Unpowergated Head1 pd
[ 106.589809] tegradc 15200000.display: hdmi: tmds rate:148500K prod-setting:prod_c_hdmi_111m_223m
[ 106.591421] tegradc 15200000.display: hdmi: get YCC quant from EDID.
[ 106.595535] extcon-disp-state external-connection:disp-state: cable 47 state 1
[ 106.595541] Extcon AUX1(HDMI) enable
[ 106.595609] tegradc 15200000.display: unblank
[ 106.595637] tegradc 15210000.display: blank - powerdown

I have tried with Samsung old monitor and it works. Looking forward your help to fix the issue with Dell monitor.

Thanks
Sujit

[WayneWWW]

please attach your full log. Not only partial log.

[sujit.kumar]

Thanks your quick reply. Attaching my full kernel log.
kernel_log.txt (64.4 KB)

[WayneWWW]

Do you have a 3rd monitor that can validate ?

Also, is this hardware ever tested on rel-32 before?

[sujit.kumar]

@WayneWWW

rel-32

I tried multiple dell monitor but no luck.
I also tried with HP which says set resolution to 1920x1200.

rel-32 ?? I didn’t understand what you mean.

[WayneWWW]

Jetpack5.x is based on rel-35 software release.

Jetpack4.x is based on rel-32 software release.

[WayneWWW]

Also, do you have NV devkit on your side which can check the monitor compatibility too?

[sujit.kumar]

I am using jetpack 5.1

[sujit.kumar]

No we don’t have NV devkit but we tried with AUVIDEA and monitor is working.

[WayneWWW]

I am using jetpack 5.1

Yes, I know. I can tell it by reading your log. That is why I asked does this carrier board ever get tested on rel-32 .

[WayneWWW]

Then your hardware may still have problem. Please check if lane 0 and lane 2 are reversed connected or not.

[sujit.kumar]

No, we have never tested on rel-32.

[sujit.kumar]

No its not reverse connected

[WayneWWW]

could you share the full schematic with where that HDMI_TX0_P/N goes to?

[sujit.kumar]

[WayneWWW]

Hi,

Please refer to our design guide document. The lane 0 and lane 2 have to be reversed connected for HDMI.

[sujit.kumar]

Can you point which dtsi and where to change it.
I am referring tegra194-p3509-disp.dtsi & tegra194-hdmi.dtsi. I am not seeing any pin control.

[WayneWWW]

Are you able to change your hardware design?

[sujit.kumar]

Hi Wayne,

I did small rework with my board, now I have made lane 0 and lane 2 reversed connected. With this changes I am able to get display working with Dell monitor.

Appreciate your quick response and help.

Thanks,
Sujit