[alsa-devel] [PATCH] ALSA: hda - Turn on PIN_OUT from hdmi playback prepare.

[Rajeev kumar]

On 7/19/2012 3:04 PM, Dylan Reid wrote:
> On Thu, Jul 19, 2012 at 2:26 AM, Takashi Iwai<tiwai at suse.de>  wrote:
>> At Thu, 19 Jul 2012 02:19:11 -0700,
>> Dylan Reid wrote:
>>>
>>> Turn on the pin widget's PIN_OUT bit from playback prepare. The pin is
>>> enabled in open, but is disabled in hdmi_init_pin which is called during
>>> system resume. This causes a system suspend/resume during playback to
>>> mute HDMI/DP. Enabling the pin in prepare allows calling snd_pcm_prepare
>>> after a system resume to restore audio.
>>
>> Then we can remove the corresponding code in
>> generic_hdmi_playback_pcm_open()?
> good point, I'll run a quick test and send a new patch.

Leave a blank line before and after your comment, so that it easy to locate.

~Rajeev

>>
>>
>> Takashi
>>
>>>
>>> Signed-off-by: Dylan Reid<dgreid at chromium.org>
>>> ---
>>>   sound/pci/hda/patch_hdmi.c | 6 ++++++
>>>   1 file changed, 6 insertions(+)
>>>
>>> diff --git a/sound/pci/hda/patch_hdmi.c b/sound/pci/hda/patch_hdmi.c
>>> index 0b4a1ea..c53f99c 100644
>>> --- a/sound/pci/hda/patch_hdmi.c
>>> +++ b/sound/pci/hda/patch_hdmi.c
>>> @@ -1153,11 +1153,17 @@ static int generic_hdmi_playback_pcm_prepare(struct hda_pcm_stream *hinfo,
>>>        struct hdmi_spec *spec = codec->spec;
>>>        int pin_idx = hinfo_to_pin_index(spec, hinfo);
>>>        hda_nid_t pin_nid = spec->pins[pin_idx].pin_nid;
>>> +     int pinctl;
>>>
>>>        hdmi_set_channel_count(codec, cvt_nid, substream->runtime->channels);
>>>
>>>        hdmi_setup_audio_infoframe(codec, pin_idx, substream);
>>>
>>> +     pinctl = snd_hda_codec_read(codec, pin_nid, 0,
>>> +                                 AC_VERB_GET_PIN_WIDGET_CONTROL, 0);
>>> +     snd_hda_codec_write(codec, pin_nid, 0,
>>> +                         AC_VERB_SET_PIN_WIDGET_CONTROL, pinctl | PIN_OUT);
>>> +
>>>        return hdmi_setup_stream(codec, cvt_nid, pin_nid, stream_tag, format);
>>>   }
>>>
>>> --
>>> 1.7.11.2.138.g2b53359
>>>
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