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ALSA: hda - Fix inconsistent monitor_present state until repoll 

While the previous commit fixed the missing monitor_present flag
update, it may be still in an inconsistent state while the driver
repolls: the flag itself is updated, but the eld_valid flag and the
contents don't follow until the repoll finishes (and may be repeated
for a few times).

The basic problem is that pin_eld->monitor_present is updated in the
caller side.  This should have been updated only in update_eld().  So,
the proper fix is to avoid accessing pin_eld but only spec->temp_eld.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai 2016-04-13 09:45:53 +02:00
parent 023d8218ec
commit c44da62b55
1 changed files with 4 additions and 7 deletions
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11
sound/pci/hda/patch_hdmi.c
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@ -1396,7 +1396,6 @@ static bool hdmi_present_sense_via_verbs(struct hdmi_spec_per_pin *per_pin,
struct hda_codec *codec = per_pin->codec;
struct hdmi_spec *spec = codec->spec;
struct hdmi_eld *eld = &spec->temp_eld;
struct hdmi_eld *pin_eld = &per_pin->sink_eld;
hda_nid_t pin_nid = per_pin->pin_nid;
/*
* Always execute a GetPinSense verb here, even when called from
@ -1413,17 +1412,15 @@ static bool hdmi_present_sense_via_verbs(struct hdmi_spec_per_pin *per_pin,
present = snd_hda_pin_sense(codec, pin_nid);
mutex_lock(&per_pin->lock);
pin_eld->monitor_present = !!(present & AC_PINSENSE_PRESENCE);
eld->monitor_present = pin_eld->monitor_present;
if (pin_eld->monitor_present)
eld->monitor_present = !!(present & AC_PINSENSE_PRESENCE);
if (eld->monitor_present)
eld->eld_valid = !!(present & AC_PINSENSE_ELDV);
else
eld->eld_valid = false;
codec_dbg(codec,
"HDMI status: Codec=%d Pin=%d Presence_Detect=%d ELD_Valid=%d\n",
codec->addr, pin_nid, pin_eld->monitor_present, eld->eld_valid);
codec->addr, pin_nid, eld->monitor_present, eld->eld_valid);
if (eld->eld_valid) {
if (spec->ops.pin_get_eld(codec, pin_nid, eld->eld_buffer,
@ -1443,7 +1440,7 @@ static bool hdmi_present_sense_via_verbs(struct hdmi_spec_per_pin *per_pin,
else
update_eld(codec, per_pin, eld);
ret = !repoll || !pin_eld->monitor_present || pin_eld->eld_valid;
ret = !repoll || !eld->monitor_present || eld->eld_valid;
jack = snd_hda_jack_tbl_get(codec, pin_nid);
if (jack)