i.MX ProcessorsのトピックRe: HDMI Hotplug Issue

HDMI Hotplug Issue

yashavanthashet — Mon, 21 Jan 2019 06:49:37 GMT

Hi,

We are using i.MX8M custom board with "fsl-yocto-L4.9.51_mx8mq-ga" release.

In our board when HDMI is enabled using DCSS, when we boot the board without connecting HDMI cable board hangs or restart after below print.

**********************************************************
[ 1.087673] msm_serial: driver initialized
[ 1.094624] [drm] Initialized
[ 1.107137] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
[ 1.113788] [drm] No driver support for vblank timestamp query.
[ 1.119895] imx-drm display-subsystem: bound imx-dcss-crtc.0 (ops dcss_crtc_ops)
[ 1.139614] VIC 2, pixel clock 148500 kHz
[ 1.143906] Pixel clock frequency: 148500 kHz, character clock frequency: 148500, color depth is 8-bit.
[ 1.153317] VCO frequency is 5940000 kHz
[ 1.160104] CDN_API_General_Write_Register_blocking LANES_CONFIG ret = 0
[ 1.167710] [drm] hdmi-audio-codec driver bound to HDMI
[ 1.173017] imx-drm display-subsystem: bound 32c00000.hdmi (ops imx_hdp_imx_ops)
[ 1.180478] imx-drm display-subsystem: No connectors reported connected with modes
[ 1.188129] [drm] Cannot find any crtc or sizes - going 1024x768
[ 1.210408] Console: switching to colour frame buffer device 128x48
[ 1.229842] imx-drm display-subsystem: fb0: frame buffer device
**********************************************************
It boots without any issue when HDMI cable is connected, and also after booting, if cable removed and connected it works fine.

Thanks in advance,

Regards,

Yashavantha

Re: HDMI Hotplug Issue

yashavanthashet — Wed, 30 Jan 2019 04:42:37 GMT

Hi,

Is there any updates regarding this?

Regards,

Yashavantha

Re: HDMI Hotplug Issue

diegoadrian — Wed, 30 Jan 2019 14:51:33 GMT

Hello,

I apologize for the delay,

I am reviewing this problem internally, I will update you as soon as possible.

Best Regards,

Diego.

Re: HDMI Hotplug Issue

yashavanthashet — Thu, 31 Jan 2019 14:37:49 GMT

Hi,

Kindly update as soon as you get some updates.

Best Regards,

Yashavantha

Re: HDMI Hotplug Issue

diegoadrian — Wed, 06 Feb 2019 18:08:51 GMT

Hello,

Just to be completely sure, the connection and the drivers that you use are exactly the same as the ones in our reference board?

This is because, neither the apps engineer and I can reproduce the error that you are having.

Best Regards,

Diego.