[meta-freescale] No HDMI video on imx6qsabresd with dizzy

[Daiane Angolini]

On Thu, Nov 13, 2014 at 8:22 PM, Nikolay Dimitrov <picmaster at mail.bg> wrote:
> Hi Daiane,
>
>
> On 11/13/2014 10:50 PM, Daiane Angolini wrote:
>>
>> On Thu, Nov 13, 2014 at 5:34 PM, Nikolay Dimitrov <picmaster at mail.bg>
>> wrote:
>>>
>>> Hi guys,
>>>
>>> Thanks to Fabio the HDMI is now working. Here's how:
>>>
>>> 1. Disabled HDMI support in u-boot-fsl (actually disabled all video-
>>> related support, as it was easier/faster).
>>> 2. Added the usual video configuration to "mmcarg" env-var:
>>>
>>> video=mxcfb0:dev=hdmi,1280x720M at 60,if=RGB24
>>>
>>> 3. Booted the board (had to set mmcdev to 0 as I boot from SD2).
>>> 4. Observed that Xorg was running on the HDMI screen.
>>> 5. Played video via gstreamer and observed it's rendering on the screen
>>> without issues.
>>>
>>> After discussion with Andreas, I tested the following resolutions and
>>> they worked OK:
>>>
>>> - 640x480
>>> - 800x600
>>> - 1024x768
>>> - 1280x720
>>> (just don't have the time to test more as these were OK for my tests)
>>>
>>> @Daiane: I checked the description for bug #6703, but I don't observe
>>> the issue here. I left my HDMI cable connected all the time, and it
>>> still works. I even power-cycled the board to make sure that the HDMI
>>> hardware is not left initialized from a previous boot. My understanding
>>> is that the reason it works is Fabio's suggestion to disable U-Boot
>>> HDMI support.
>>
>>
>> You are right, Nikolay, and if you see [1], the second comment, I
>> suggest turning of HDMI as a workaround, but using LVDS instead.
>>
>> However, I got confused when you said you have never reproduced the
>> error regarding plug/unplug the cable.
>> Do you mean you was not able to reproduce it *after* get it fixed, or
>> you have never been able?
>
>
> Sorry for the confusion. After I modified U-Boot, I didn't observed the
> issue. Btw, after seeing your comment I went and reverted the change
> just to be sure what's happening. And it turned out that you're right,
> the issue can again be reproduced as described in #6703. Just to be
> more clear, here's what I've tested:
>
> 1. Unmodified U-Boot, HDMI cable connected during power-on: kernel hangs
> 2. Unmodified U-Boot, HDMI cable connected later: works OK
> 3. Disabled U-Boot video, HDMI cable connected during power-on: works OK
> 4. Disabled U-Boot video, HDMI cable connected later: works OK

Ok!
Great, and thanks ;-)

>
>> I would like to have you updating the bug with your workaround. Could
>> you, please leave a comment there with your how-to?
>
>
> Sure, np.

=D

Daiane
>
> Regards,
> Nikolay