[meta-freescale] No HDMI signal from Nitrogen6x board with daisy

[Eric Nelson]

On 05/23/2014 05:58 PM, Eric Nelson wrote:
> Sorry Peter,
>
 > <snip>
 >
> Can you try running this by hand?
>
> U-Boot > setenv bootargs enable_wait_mode=off
> video=mxcfb0:dev=hdmi,1920x1080MR at 60,if=RGB24 video=mxcfb1:off
> video=mxcfb2:off video=mxcfb3:off fbmem=28M console=ttymxc1,115200
> vmalloc=400M consoleblank=0 rootwait root=/dev/mmcblk0p2
> mxc_hdmi.only_cea=1
> U-Boot > mmc dev 0 && fatload mmc 0 10800000 uImage && bootm 10800000
>
> I suspect we introduced a bug when pulling our "only_cea" patch
> over to 3.10.17.
>

Sorry about that. I pasted the 3.0.35 kernel parameters and
load commands.

Testing on the same version as you are, I found the same thing
though.

U-Boot > setenv bootargs enable_wait_mode=off 
video=mxcfb0:dev=hdmi,1920x1080M at 60,if=RGB24 video=mxcfb1:off 
video=mxcfb2:off video=mxcfb3:off fbmem=28M console=ttymxc1,115200 
vmalloc=400M consoleblank=0 rootwait root=/dev/mmcblk0p2
U-Boot > mmc dev 0 && \
	fatload mmc 0 10800000 uImage && \
	fatload mmc 0 12000000 imx6q-nitrogen6x.dtb && \
	bootm 10800000 - 12000000

Using the clause 'mxc_hdmi.only_cea=1' yields 1080P.
Without it, I get 1024x768.

So the bug is general and not specific to 3.10.17...

It's still not clear why you're getting no display at all
though, or where those IPU_INT_STAT_x or "timeout waiting
for flip irq" messages are coming from.

Can you try out the commands above?

Please advise,


Eric