This is a note to let you know that I've just added the patch titled
ALSA: hda - Always turn on pins for HDMI/DP
to the 3.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
alsa-hda-always-turn-on-pins-for-hdmi-dp.patch
and it can be found in the queue-3.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 7f778c1b063b7fb67e6367e5e7eb903ce863052b Mon Sep 17 00:00:00 2001
From: Takashi Iwai <tiwai@xxxxxxx>
Date: Fri, 14 Dec 2012 10:22:35 +0100
Subject: ALSA: hda - Always turn on pins for HDMI/DP
From: Takashi Iwai <tiwai@xxxxxxx>
commit 6169b673618bf0b2518ce413b54925782a603f06 upstream.
We've seen the broken HDMI *video* output on some machines with GM965,
and the debugging session pointed that the culprit is the disabled
audio output pins. Toggling these pins dynamically on demand caused
flickering of HDMI TV.
This patch changes the behavior to keep the pin ON constantly.
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=51421
Signed-off-by: Takashi Iwai <tiwai@xxxxxxx>
[bwh: Backported to 3.2: adjust context]
Signed-off-by: Ben Hutchings <ben@xxxxxxxxxxxxxxx>
Cc: Weng Meiling <wengmeiling.weng@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
sound/pci/hda/patch_hdmi.c | 18 ++++--------------
1 file changed, 4 insertions(+), 14 deletions(-)
--- a/sound/pci/hda/patch_hdmi.c
+++ b/sound/pci/hda/patch_hdmi.c
@@ -425,9 +425,11 @@ static void hdmi_init_pin(struct hda_cod
if (get_wcaps(codec, pin_nid) & AC_WCAP_OUT_AMP)
snd_hda_codec_write(codec, pin_nid, 0,
AC_VERB_SET_AMP_GAIN_MUTE, AMP_OUT_UNMUTE);
- /* Disable pin out until stream is active*/
+ /* Enable pin out: some machines with GM965 gets broken output when
+ * the pin is disabled or changed while using with HDMI
+ */
snd_hda_codec_write(codec, pin_nid, 0,
- AC_VERB_SET_PIN_WIDGET_CONTROL, 0);
+ AC_VERB_SET_PIN_WIDGET_CONTROL, PIN_OUT);
}
static int hdmi_get_channel_count(struct hda_codec *codec, hda_nid_t cvt_nid)
@@ -1152,17 +1154,11 @@ static int generic_hdmi_playback_pcm_pre
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);
}
@@ -1174,7 +1170,6 @@ static int generic_hdmi_playback_pcm_cle
int cvt_idx, pin_idx;
struct hdmi_spec_per_cvt *per_cvt;
struct hdmi_spec_per_pin *per_pin;
- int pinctl;
snd_hda_codec_cleanup_stream(codec, hinfo->nid);
@@ -1193,11 +1188,6 @@ static int generic_hdmi_playback_pcm_cle
return -EINVAL;
per_pin = &spec->pins[pin_idx];
- pinctl = snd_hda_codec_read(codec, per_pin->pin_nid, 0,
- AC_VERB_GET_PIN_WIDGET_CONTROL, 0);
- snd_hda_codec_write(codec, per_pin->pin_nid, 0,
- AC_VERB_SET_PIN_WIDGET_CONTROL,
- pinctl & ~PIN_OUT);
snd_hda_spdif_ctls_unassign(codec, pin_idx);
}
Patches currently in stable-queue which might be from tiwai@xxxxxxx are
queue-3.4/alsa-aloop-fix-oops-while-pm-resume.patch
queue-3.4/alsa-usb-add-quirk-for-192khz-recording-on-e-mu-devices.patch
queue-3.4/alsa-hda-add-conexant-cx20751-2-3-4-codec-support.patch
queue-3.4/revert-alsa-hda-shut-up-pins-at-power-saving-mode-with-conexnat-codecs.patch
queue-3.4/alsa-hda-fix-non-snoop-page-handling.patch
queue-3.4/alsa-hda-always-turn-on-pins-for-hdmi-dp.patch
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