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Message-ID: <51345148.1040102@canonical.com>
Date: Mon, 04 Mar 2013 08:46:16 +0100
From: David Henningsson <david.henningsson@...onical.com>
To: Ben Hutchings <ben@...adent.org.uk>
CC: stable@...r.kernel.org, akpm@...ux-foundation.org,
LKML <linux-kernel@...r.kernel.org>,
Takashi Iwai <tiwai@...e.de>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: Re: [ 093/153] ALSA: hda - hdmi: Make jacks phantom, if theyre not
detectable
On 03/04/2013 06:13 AM, Ben Hutchings wrote:
> On Mon, 2013-03-04 at 03:38 +0000, Ben Hutchings wrote:
>> 3.2-stable review patch. If anyone has any objections, please let me know.
>>
>> ------------------
>>
>> From: David Henningsson <david.henningsson@...onical.com>
>>
>> commit 30efd8debd1ef30be342d374f01e993509f5b76b upstream.
>>
>> Just as for analog codecs, a jack that isn't suitable for detection
>> (in this case, NO_PRESENCE was set) should be a phantom Jack
>> instead of a normal one.
>>
>> Thanks to Raymond Yau for spotting.
>>
>> BugLink: https://bugs.launchpad.net/bugs/961286
>> BugLink: https://bugzilla.redhat.com/show_bug.cgi?id=903869
>> Signed-off-by: David Henningsson <david.henningsson@...onical.com>
>> Signed-off-by: Takashi Iwai <tiwai@...e.de>
>> [bwh: Backported to 3.2: adjust context]
>> Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
>
> David, do I need to change this further for 3.2.y?
Greg and Ben,
Given some thought, the definition of is_jack_detectable has
changed/improved over kernels. Therefore I think it's safer not to apply
the patch at all for kernels earlier than 3.6. Let's revisit this
decision if there's actually a user demand for this fix.
>
> Ben.
>
>> ---
>> sound/pci/hda/patch_hdmi.c | 3 +++
>> 1 file changed, 3 insertions(+)
>>
>> --- a/sound/pci/hda/patch_hdmi.c
>> +++ b/sound/pci/hda/patch_hdmi.c
>> @@ -1228,6 +1228,9 @@ static int generic_hdmi_build_jack(struc
>> int pcmdev = spec->pcm_rec[pin_idx].device;
>>
>> snprintf(hdmi_str, sizeof(hdmi_str), "HDMI/DP,pcm=%d", pcmdev);
>> + if (!is_jack_detectable(codec, per_pin->pin_nid))
>> + strncat(hdmi_str, " Phantom",
>> + sizeof(hdmi_str) - strlen(hdmi_str) - 1);
>>
>> err = snd_hda_input_jack_add(codec, per_pin->pin_nid,
>> SND_JACK_VIDEOOUT, pcmdev > 0 ? hdmi_str : NULL);
>>
>>
>> --
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>
--
David Henningsson, Canonical Ltd.
https://launchpad.net/~diwic
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