Re: No HDMI signal from Nitrogen6x board with daisy

[Eric Nelson <eric.nelson@boundarydevices.com>]

Hello Peter,

On 05/23/2014 05:16 AM, Otavio Salvador wrote:
>
> On Fri, May 23, 2014 at 4:23 AM, Peter Bergin <peter.bergin@tritech.se
> <mailto:peter.bergin@tritech.se>> wrote:
>
>     I have trouble with my Nitrogen6x board after upgrade to daisy
>     build. I can not get any HDMI signal out of the board after boot.
>     During boot u-boot can show content on screen but when booted the
>     monitor does not detect the signal.
>
>     I have updated to u-boot 2014.04. I have tried with the pre-built
>     image found at Boundary Devices with same result as my own build.
>

This is not likely to be a U-Boot level thing.

>     I see this printout on the console after boot:
>     mxc_sdc_fb fb.27: timeout when waiting for flip irq
>     mxc_sdc_fb fb.27: MXCFB_WAIT_FOR_VSYNC: timeout 0
>     mxc_sdc_fb fb.27: timeout when waiting for flip irq
>     mxc_sdc_fb fb.27: MXCFB_WAIT_FOR_VSYNC: timeout 0
>     mxc_sdc_fb fb.27: timeout when waiting for flip irq
>     mxc_sdc_fb fb.27: MXCFB_WAIT_FOR_VSYNC: timeout 0
>
>     I have also posted a, still unanswered, question on the Freescale
>     community page (https://community.freescale.com/message/405002).
>

I saw that post, but have been struggling to find time to reproduce it.
A nominal build of Daisy/fsl-image-machine-test just seemed to
work for me at 1080P60.

Are you also running 1080P (i.e. with a custom boot script)?

Can you forward the content of /proc/cmdline?

>     Any help is really appreciated! Any ideas?
>
> I think it might be your monitor do not support the frequency it is using.
>
If your monitor supports EDID, you should be able to tell by
looking in sysfs:

	# cat /sys/class/graphics/fb0/mode
	... currently negotiated mode here

	# cat /sys/class/graphics/fb0/modes
	... list of supported modes should be here

> I am adding Eric in Cc so he can comment on this.
>

I'm afraid I have more questions than advice.

Can you tell me more about what image you're running? Is it based
on X, DFB, Wayland?

Do you see the penguins during Linux boot?

Please advise,


Eric