[alsa-devel] [PATCH] ALSA: HDA: Add jack detection for HDMI

David Henningsson david.henningsson at canonical.com
Thu May 19 11:55:21 CEST 2011

On 2011-05-17 17:46, Takashi Iwai wrote:
> At Tue, 17 May 2011 15:46:43 +0200,
> David Henningsson wrote:
>> Just as for headphones and microphone jacks, this patch adds reporting
>> of HDMI jack status through the input layer.
>> I considered making additional SND_JACK_* constants for HDMI and
>> Displayport instead of going with SND_JACK_VIDEOOUT, but it didn't seem
>> worth the additions, and breakage of compiling with old kernels, etc.
>> Let me know if you think otherwise and I'll prepare a second patch for
>> that.
> Did you test it with the actual machine, right?
> If it's working, I'm fine to add it.

To be honest; it's partially working, or rather it's working in the 
sense that it follows the eld proc file. It's also working in hda-emu.

I've tried it on one Nvidia (with binary drivers), and one Intel 
Graphics and well, and both seem to have the same problem essentially: 
There is no hotplug event coming in (through hdmi_unsol_event) when a 
monitor is removed. But with this patch in perhaps the graphics driver 
writers will feel more motivated to fix it? :-)

Note that the hotplug event is not coming in when you actually plug the 
cable but when you detect displays and/or apply the monitor 
configuration change.

I'm attaching a new version of the patch according to your preference, 
in hopes that it will be in 2.6.40.

David Henningsson, Canonical Ltd.
-------------- next part --------------
A non-text attachment was scrubbed...
Name: 0001-ALSA-HDA-Add-jack-detection-for-HDMI.patch
Type: text/x-patch
Size: 0 bytes
Desc: not available
Url : http://mailman.alsa-project.org/pipermail/alsa-devel/attachments/20110519/9cb7ff50/attachment.patch 

More information about the Alsa-devel mailing list