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imx6q sabresd hdmi same edid

Question asked by Ian Fox on May 14, 2018
Latest reply on May 16, 2018 by Bio_TICFSL

Hello,

        I am developing a custom imx6q board and using the imx6q-sabresd as reference. On both the custom and sabresd board I get a valid HDMI display (I can run gstreamer etc) and then a random time later get a blank screen with a message "mxc_hdmi 20e0000.hdmi_video: same edid".

 

I am running yocto build Linux version 4.1.15-2.1.0+g30278ab (ian@ubuntu) (gcc version 5.3.0 (GCC) ) #1 SMP PREEMPT Wed Jun 14 12:21:42 PDT 2017.

 

Looking at the hdmi i2c lines all looks good and I can see (what looks like) valid edid messages by using

"for f in `find /sys -name edid`; do echo $f; cat $f; done".

 

typical dmesg is :-

 

root@imx6qsabresd:~# dmesg | grep hdmi
20e0000.hdmi_video supply HDMI not found, using dummy regulator
mxc_hdmi 20e0000.hdmi_video: Detected HDMI controller 0x13:0xa:0xa0:0xc1
mxc_sdc_fb fb@0: registered mxc display driver hdmi
imx-audio-hdmi sound-hdmi: hdmi-hifi <-> soc:hdmi_audio@00120000 mapping ok
hdmi-5v-supply: disabling
  #0: imx-hdmi-soc
mxc_hdmi 20e0000.hdmi_video: same edid
mxc_hdmi 20e0000.hdmi_video: same edid
mxc_hdmi 20e0000.hdmi_video: same edid
mxc_hdmi 20e0000.hdmi_video: same edid
root@imx6qsabresd:~#

 

uboot display setup is :-

 

Hit any key to stop autoboot:  0
=> printenv displayinfo
displayinfo=video=mxcfb0:dev=hdmi,1920x1080M@60,if=RGB24

 

 

 

Any help would be very appertained..

 

Regards Ian

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