[PATCHv2 0/9] omapdrm: hdmi4: add CEC support

[Tomi Valkeinen]

Hi Hans,


Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki. Y-tunnus/Business ID: 0615521-4. Kotipaikka/Domicile: Helsinki

On 02/08/17 11:53, Hans Verkuil wrote:
> From: Hans Verkuil <hans.verkuil at cisco.com>
> 
> This patch series adds CEC support for the omap4. It is based on
> the 4.13-rc2 kernel with this patch series applied:
> 
> http://www.spinics.net/lists/dri-devel/msg143440.html
> 
> It is virtually identical to the first patch series posted in
> April:
> 
> http://www.spinics.net/lists/dri-devel/msg138950.html
> 
> The only two changes are in the Kconfig due to CEC Kconfig
> changes in 4.13 (it now selects CEC_CORE instead of depending on
> CEC_CORE) and a final patch was added adding a lost_hotplug op
> since for proper CEC support I have to know when the hotplug
> signal goes away.
> 
> Tested with my Pandaboard.

I'm doing some testing with this series on my panda. One issue I see is
that when I unload the display modules, I get:

[   75.180206] platform 58006000.encoder: enabled after unload, idling
[   75.187896] platform 58001000.dispc: enabled after unload, idling
[   75.198242] platform 58000000.dss: enabled after unload, idling

So I think something is left enabled, most likely in the HDMI driver. I
haven't debugged this yet.

The first time I loaded the modules I also got "operation stopped when
reading edid", but I haven't seen that since. Possibly not related to
this series.

Are there some simple ways to test the CEC? My buildroot fs has
cec-compliance, cec-ctl and cec-follower commands. Are you familiar with
those? Can they be used?

 Tomi