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ALSA: hda - hdmi: Notify userspace when ELD control changes 

ELD validity can change during the lifetime of a presence detect,
so we need to be able to listen for changes on the ELD control.

Signed-off-by: David Henningsson <david.henningsson@canonical.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
David Henningsson 2013-02-19 16:11:26 +01:00 committed by Takashi Iwai
parent 4bd038f9d8
commit 92c69e796b
1 changed files with 12 additions and 2 deletions
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14
sound/pci/hda/patch_hdmi.c
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@ -75,6 +75,7 @@ struct hdmi_spec_per_pin {
struct hda_codec *codec;
struct hdmi_eld sink_eld;
struct delayed_work work;
struct snd_kcontrol *eld_ctl;
int repoll_count;
bool non_pcm;
bool chmap_set; /* channel-map override by ALSA API? */
@ -413,6 +414,7 @@ static int hdmi_create_eld_ctl(struct hda_codec *codec, int pin_idx,
if (err < 0)
return err;
spec->pins[pin_idx].eld_ctl = kctl;
return 0;
}
@ -1220,11 +1222,14 @@ static void hdmi_present_sense(struct hdmi_spec_per_pin *per_pin, int repoll)
}
mutex_lock(&pin_eld->lock);
if (pin_eld->eld_valid && !eld->eld_valid)
if (pin_eld->eld_valid && !eld->eld_valid) {
update_eld = true;
eld_changed = true;
}
if (update_eld) {
pin_eld->eld_valid = eld->eld_valid;
eld_changed = memcmp(pin_eld->eld_buffer, eld->eld_buffer,
eld_changed = pin_eld->eld_size != eld->eld_size ||
memcmp(pin_eld->eld_buffer, eld->eld_buffer,
eld->eld_size) != 0;
if (eld_changed)
memcpy(pin_eld->eld_buffer, eld->eld_buffer,
@ -1233,6 +1238,11 @@ static void hdmi_present_sense(struct hdmi_spec_per_pin *per_pin, int repoll)
pin_eld->info = eld->info;
}
mutex_unlock(&pin_eld->lock);
if (eld_changed)
snd_ctl_notify(codec->bus->card,
SNDRV_CTL_EVENT_MASK_VALUE | SNDRV_CTL_EVENT_MASK_INFO,
&per_pin->eld_ctl->id);
}
static void hdmi_repoll_eld(struct work_struct *work)