[PATCH 5/7] ALSA: hda - Use component ops for i915 HDMI/DP audio jack handling

Takashi Iwai
2015-11-30T13:38:05Z

Since we have a new audio component ops to fetch the current ELD and
state now, we can reduce the usage of unsol event of HDMI/DP pins.
The unsol event isn't only unreliable, but it also needs the power
up/down of the codec and link at each time, which is a significant
power and time loss.

In this patch, the jack creation and unsol/jack event handling are
modified to use the audio component for the dedicated Intel chips.

The jack handling got slightly more codes than a simple usage of
hda_jack layer since we need to deal directly with snd_jack object;
the hda_jack layer is basically designed for the pin sense read and
unsol events, both of which aren't used any longer in our case.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
---
sound/pci/hda/patch_hdmi.c | 84 ++++++++++++++++++++++++++++++++++++++++++++--
1 file changed, 82 insertions(+), 2 deletions(-)

diff --git a/sound/pci/hda/patch_hdmi.c b/sound/pci/hda/patch_hdmi.c
index 28684aa86408..8378c31e0b4f 100644
--- a/sound/pci/hda/patch_hdmi.c
+++ b/sound/pci/hda/patch_hdmi.c
@@ -83,6 +83,7 @@ struct hdmi_spec_per_pin {
struct mutex lock;
struct delayed_work work;
struct snd_kcontrol *eld_ctl;
+ struct snd_jack *acomp_jack; /* jack via audio component */
int repoll_count;
bool setup; /* the stream has been set up by prepare callback */
int channels; /* current number of channels */
@@ -141,6 +142,7 @@ struct hdmi_spec {
struct hdmi_ops ops;

bool dyn_pin_out;
+ bool use_acomp; /* use audio component for ELD notify/update */

/*
* Non-generic VIA/NVIDIA specific
@@ -1580,6 +1582,9 @@ static void update_eld(struct hda_codec *codec,
&per_pin->eld_ctl->id);
}

+static void sync_eld_via_acomp(struct hda_codec *codec,
+ struct hdmi_spec_per_pin *per_pin);
+
static bool hdmi_present_sense(struct hdmi_spec_per_pin *per_pin, int repoll)
{
struct hda_jack_tbl *jack;
@@ -1599,6 +1604,11 @@ static bool hdmi_present_sense(struct hdmi_spec_per_pin *per_pin, int repoll)
int present;
bool ret;

+ if (spec->use_acomp) {
+ sync_eld_via_acomp(codec, per_pin);
+ return false; /* don't call snd_hda_jack_report_sync() */
+ }
+
snd_hda_power_up_pm(codec);
present = snd_hda_pin_sense(codec, pin_nid);

@@ -2091,6 +2101,68 @@ static int generic_hdmi_build_pcms(struct hda_codec *codec)
return 0;
}

+/* update ELD and jack state via audio component */
+static void sync_eld_via_acomp(struct hda_codec *codec,
+ struct hdmi_spec_per_pin *per_pin)
+{
+ struct i915_audio_component *acomp = codec->bus->core.audio_component;
+ struct hdmi_spec *spec = codec->spec;
+ struct hdmi_eld *eld = &spec->temp_eld;
+ int size;
+
+ if (acomp && acomp->ops && acomp->ops->get_eld) {
+ mutex_lock(&per_pin->lock);
+ size = acomp->ops->get_eld(acomp->dev,
+ intel_pin2port(per_pin->pin_nid),
+ &eld->monitor_present,
+ eld->eld_buffer,
+ ELD_MAX_SIZE);
+ if (size > 0) {
+ memset(&eld->info, 0, sizeof(eld->info));
+ if (snd_hdmi_parse_eld(codec, &eld->info,
+ eld->eld_buffer, size) < 0)
+ size = -EINVAL;
+ }
+
+ if (size > 0) {
+ eld->eld_valid = true;
+ eld->eld_size = size;
+ } else {
+ eld->eld_valid = false;
+ eld->eld_size = 0;
+ }
+
+ update_eld(codec, per_pin, eld);
+ snd_jack_report(per_pin->acomp_jack,
+ eld->monitor_present ? SND_JACK_AVOUT : 0);
+ mutex_unlock(&per_pin->lock);
+ }
+}
+
+static void free_acomp_jack_priv(struct snd_jack *jack)
+{
+ struct hdmi_spec_per_pin *per_pin = jack->private_data;
+
+ per_pin->acomp_jack = NULL;
+}
+
+static int add_acomp_jack_kctl(struct hda_codec *codec,
+ struct hdmi_spec_per_pin *per_pin,
+ const char *name)
+{
+ struct snd_jack *jack;
+ int err;
+
+ err = snd_jack_new(codec->card, name, SND_JACK_AVOUT, &jack,
+ true, false);
+ if (err < 0)
+ return err;
+ per_pin->acomp_jack = jack;
+ jack->private_data = per_pin;
+ jack->private_free = free_acomp_jack_priv;
+ return 0;
+}
+
static int generic_hdmi_build_jack(struct hda_codec *codec, int pin_idx)
{
char hdmi_str[32] = "HDMI/DP";
@@ -2101,6 +2173,8 @@ static int generic_hdmi_build_jack(struct hda_codec *codec, int pin_idx)

if (pcmdev > 0)
sprintf(hdmi_str + strlen(hdmi_str), ",pcm=%d", pcmdev);
+ if (spec->use_acomp)
+ return add_acomp_jack_kctl(codec, per_pin, hdmi_str);
phantom_jack = !is_jack_detectable(codec, per_pin->pin_nid);
if (phantom_jack)
strncat(hdmi_str, " Phantom",
@@ -2196,6 +2270,8 @@ static int generic_hdmi_init(struct hda_codec *codec)
hda_nid_t pin_nid = per_pin->pin_nid;

hdmi_init_pin(codec, pin_nid);
+ if (spec->use_acomp)
+ continue;
snd_hda_jack_detect_enable_callback(codec, pin_nid,
codec->jackpoll_interval > 0 ? jack_callback : NULL);
}
@@ -2219,7 +2295,7 @@ static void generic_hdmi_free(struct hda_codec *codec)
struct hdmi_spec *spec = codec->spec;
int pin_idx;

- if (is_haswell_plus(codec) || is_valleyview_plus(codec))
+ if (spec->use_acomp)
snd_hdac_i915_register_notifier(NULL);

for (pin_idx = 0; pin_idx < spec->num_pins; pin_idx++) {
@@ -2227,6 +2303,8 @@ static void generic_hdmi_free(struct hda_codec *codec)

cancel_delayed_work_sync(&per_pin->work);
eld_proc_free(per_pin);
+ if (per_pin->acomp_jack)
+ snd_device_free(codec->card, per_pin->acomp_jack);
}

hdmi_array_free(spec);
@@ -2388,7 +2466,9 @@ static int patch_generic_hdmi(struct hda_codec *codec)
is_broxton(codec))
codec->core.link_power_control = 1;

- if (is_haswell_plus(codec) || is_valleyview_plus(codec)) {
+ spec->use_acomp =
+ is_haswell_plus(codec) || is_valleyview_plus(codec);
+ if (spec->use_acomp) {
codec->depop_delay = 0;
spec->i915_audio_ops.audio_ptr = codec;
spec->i915_audio_ops.pin_eld_notify = intel_pin_eld_notify;
--
2.6.3