[meta-intel] [linux-yocto] how to enable 2nd HDMI port on Intel Atom (bay-trail) E3800 SoC?

[Gerard Bucas]

Thanks Bruce!

Let's see if meta-intel can be of more help!

The good news is that we have got a little further (had hdmi2 muxed with LVDS and the gpio controlling the mux was pointing the wrong way!). 

Now we can't seem to be able to get the dynamic handling of 'hot plugging' (boot without cable in HDMI2 and inset later or remove and re-insert cable to different monitor) working. 

Would REALLY appreciate some help/pointers on that - probably a simple kernel flag to set or an additional subsystem to append in yocto local.conf...?

Regards

Gerard



> On Jul 24, 2015, at 6:44 PM, Bruce Ashfield <bruce.ashfield at windriver.com> wrote:
> 
>> On 15-07-23 04:54 PM, Gerard Bucas wrote:
>> Hi everyone
>> 
>> We have a new Intel Atom E3800 (Bay Trail) based board with 2 x HDMI ports.
>> We are using the edk2 firmware (used the minnowBoard MAX firmware source as
>> basis) but we can't seem to get the HDMI-2 port to be recognized by either
>> the firmware or our linux kernel (built with latest yocto project - kernel
>> version is 3.19.5).
>> 
>> Can anyone give me some pointers as to what we need in either/both firmware
>> and/or linux kernel to get the 2nd HDMI port to be enumerated/recognized?
> 
> Adding meta-intel (sorry for those that aren't subscribed to linux-yocto .. feel free to remove it when you reply or you'll
> bounce).
> 
> The folks there might have a better idea.
> 
> Bruce
> 
>> 
>> Thanks!
>> 
>> Gerard Bucas
>