From: Takashi Iwai tiwai@suse.de
[ Upstream commit 551626ec0ad28dc43cae3094c35be7088cc625ab ]
The HDMI jack handling reports the state change always via snd_jack_report() whenever hdmi_present_sense() is called, even if the state itself doesn't change from the previous time. This is mostly harmless but still a bit confusing to user-space.
This patch reduces such spurious jack state changes and reports only when the state really changed. Also, as a minor optimization, avoid overwriting the pin ELD data when the state is identical.
Reviewed-by: Kai Vehmanen kai.vehmanen@linux.intel.com Signed-off-by: Takashi Iwai tiwai@suse.de Signed-off-by: Sasha Levin sashal@kernel.org --- sound/pci/hda/patch_hdmi.c | 32 ++++++++++++++++++-------------- 1 file changed, 18 insertions(+), 14 deletions(-)
diff --git a/sound/pci/hda/patch_hdmi.c b/sound/pci/hda/patch_hdmi.c index bea7b09610809..c380596b2e84c 100644 --- a/sound/pci/hda/patch_hdmi.c +++ b/sound/pci/hda/patch_hdmi.c @@ -1421,7 +1421,7 @@ static void hdmi_pcm_reset_pin(struct hdmi_spec *spec, /* update per_pin ELD from the given new ELD; * setup info frame and notification accordingly */ -static void update_eld(struct hda_codec *codec, +static bool update_eld(struct hda_codec *codec, struct hdmi_spec_per_pin *per_pin, struct hdmi_eld *eld) { @@ -1452,18 +1452,22 @@ static void update_eld(struct hda_codec *codec, snd_hdmi_show_eld(codec, &eld->info);
eld_changed = (pin_eld->eld_valid != eld->eld_valid); - if (eld->eld_valid && pin_eld->eld_valid) + eld_changed |= (pin_eld->monitor_present != eld->monitor_present); + if (!eld_changed && eld->eld_valid && pin_eld->eld_valid) if (pin_eld->eld_size != eld->eld_size || memcmp(pin_eld->eld_buffer, eld->eld_buffer, eld->eld_size) != 0) eld_changed = true;
- pin_eld->monitor_present = eld->monitor_present; - pin_eld->eld_valid = eld->eld_valid; - pin_eld->eld_size = eld->eld_size; - if (eld->eld_valid) - memcpy(pin_eld->eld_buffer, eld->eld_buffer, eld->eld_size); - pin_eld->info = eld->info; + if (eld_changed) { + pin_eld->monitor_present = eld->monitor_present; + pin_eld->eld_valid = eld->eld_valid; + pin_eld->eld_size = eld->eld_size; + if (eld->eld_valid) + memcpy(pin_eld->eld_buffer, eld->eld_buffer, + eld->eld_size); + pin_eld->info = eld->info; + }
/* * Re-setup pin and infoframe. This is needed e.g. when @@ -1481,6 +1485,7 @@ static void update_eld(struct hda_codec *codec, SNDRV_CTL_EVENT_MASK_VALUE | SNDRV_CTL_EVENT_MASK_INFO, &get_hdmi_pcm(spec, pcm_idx)->eld_ctl->id); + return eld_changed; }
/* update ELD and jack state via HD-audio verbs */ @@ -1582,6 +1587,7 @@ static void sync_eld_via_acomp(struct hda_codec *codec, struct hdmi_spec *spec = codec->spec; struct hdmi_eld *eld = &spec->temp_eld; struct snd_jack *jack = NULL; + bool changed; int size;
mutex_lock(&per_pin->lock); @@ -1608,15 +1614,13 @@ static void sync_eld_via_acomp(struct hda_codec *codec, * disconnected event. Jack must be fetched before update_eld() */ jack = pin_idx_to_jack(codec, per_pin); - update_eld(codec, per_pin, eld); + changed = update_eld(codec, per_pin, eld); if (jack == NULL) jack = pin_idx_to_jack(codec, per_pin); - if (jack == NULL) - goto unlock; - snd_jack_report(jack, - (eld->monitor_present && eld->eld_valid) ? + if (changed && jack) + snd_jack_report(jack, + (eld->monitor_present && eld->eld_valid) ? SND_JACK_AVOUT : 0); - unlock: mutex_unlock(&per_pin->lock); }