C2, VU5A and hdmi Splitter

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gvdbe.fr
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C2, VU5A and hdmi Splitter

Unread post by gvdbe.fr » Thu Feb 13, 2020 5:34 pm

Hi to all,
I build a media player with a C2, HDMI splitter and a VU5A. All works without splitter.
With the HDMI splitter, the video handshaking failed, and the VU5A don't get video signal. The HDMI spliiter try to connect. Then splitter and VU5 can't get handshaking for communicate.

Are they somes settings for fixing this ? Maybe on SD boot config file ?

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Re: C2, VU5A and hdmi Splitter

Unread post by odroid » Thu Feb 13, 2020 5:48 pm

Which OS image do you use?

It is worth to configure the boot.ini file.
- Disable HDMI auto-detection and force the output resolution manually.
- Disable HPD option just in case.

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Re: C2, VU5A and hdmi Splitter

Unread post by gvdbe.fr » Thu Feb 20, 2020 3:50 am

I done already theses. HPD true or false dont change anything.
Without splitter it's works, with it not. VU5A and splitter flip-flap to no image.

This is my setting: (It's a Corelec image)

setenv bootrootfs "BOOT_IMAGE=kernel.img boot=UUID=2911-4327 disk=UUID=efc403a6-5657-4842-a54f-b5ae9afa42ad"
setenv consoleopt "console=ttyS0,115200 console=tty0 no_console_suspend"
setenv vout_mode "hdmi"
setenv hdmimode "800x480p60hz"
setenv hdmioutput "1"
setenv vpu "1"
setenv coreelec "quiet"
setenv hdmi_cec "1"
setenv maxcpus "4"
setenv max_freq "1752"
setenv rtc_shield "1"
setenv hpd "true"

setenv loadaddr 0x11000000
setenv dtb_mem_addr 0x1000000
setenv uenv_addr 0x13000000

# GPIO settings power key : J2 (2x20) Pin#29 , GPIOX.BIT0
setenv gpiopower "228"

fatload mmc 0:1 ${loadaddr} kernel.img
fatload mmc 0:1 ${dtb_mem_addr} dtb.img

if fatload mmc 0:1 ${uenv_addr} config.ini; then env import -t ${uenv_addr} $filesize; fi

setenv device "no_console_suspend logo=osd1,loaded,0x3f800000,${hdmimode} vout=${hdmimode},enable vout_mode=${vout_mode} hdmimode=${hdmimode} cvbsmode=nocvbs mac=${ethaddr} consoleblank=0 max_freq=${max_freq} maxcpus=${maxcpus} disablehpd=${hpd} gpiopower=${gpiopower}"
if test "${hdmi_cec}" = "1"; then setenv cec "hdmitx=cec3f"; fi
setenv bootargs "console=${consoleopt} ${bootrootfs} ${device} ${cec} ${coreelec}"
showlogo ${hdmimode}

# Device tree modifications
bootm start
bootm loados
bootm fdt
if test "${rtc_shield}" = "1"; then fdt set "/i2c@c1108500/pcf8563@51" status okay; else fdt set "/i2c@c1108500/pcf8563@51" status disabled; fi
# Remove aml partition layout from device tree (required for eMMC boot)
fdt rm /partitions
bootm prep

# Boot the board
bootm go

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Re: C2, VU5A and hdmi Splitter

Unread post by odroid » Thu Feb 20, 2020 11:47 am

I have no idea since I don't know well how HDMI splitter works.

But it seems to be worth to try our official Ubuntu OS image to narrow down root causes.

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Re: C2, VU5A and hdmi Splitter

Unread post by joy » Sat Feb 22, 2020 8:58 am

Hi @gvdbe.fr,

[1]
As @odroid mentioned, please try Hardkernel official Ubuntu OS image first.
https://wiki.odroid.com/odroid-c2/os_images/ubuntu/v3.1

[2]
And if you don't get any better result from test [1], could you check one more?

Is VU5A power provided from a USB port of C2 board?
If so, please change it to use another USB port of like your host PC or something just for a test.
Let's check if display power should be on before board booting, so a hdmi splitter reads edid information at the expected timing.

1. VU5A Power on first and a hdmi splitter is connected.
2. C2 board Power on
3. Go Booting

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