[v2,6/9] ALSA: hda - Use component ops for i915 HDMI/DP audio jack handling

Submitted by Takashi Iwai on Dec. 1, 2015, 4:09 p.m.

Details

Message ID 1448986198-3488-7-git-send-email-tiwai@suse.de
State New
Headers show
Series "Add get_eld audio component for i915/HD-audio" ( rev: 3 2 ) in Intel GFX

Commit Message

Takashi Iwai Dec. 1, 2015, 4:09 p.m.
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.

In the eld_notify callback, the execution of hdmi_present_sense() is
done in a work for avoiding the deadlock in drm side.  It's reusing
the existing hdmi_repoll_eld() but ignoring the repoll_count (with the
direct access to the graphics driver, we need really no repoll, in
anyway).

Signed-off-by: Takashi Iwai <tiwai@suse.de>
---

v1->v2:
* Deferred invocation of get_eld from the eld_notify in HDA side
* A bit more code refactoring

 sound/pci/hda/patch_hdmi.c | 133 +++++++++++++++++++++++++++++++++++++++------
 1 file changed, 116 insertions(+), 17 deletions(-)

Patch hide | download patch | download mbox

diff --git a/sound/pci/hda/patch_hdmi.c b/sound/pci/hda/patch_hdmi.c
index 28684aa86408..c90b4d19c64b 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
@@ -1435,6 +1437,17 @@  static void intel_not_share_assigned_cvt(struct hda_codec *codec,
 	}
 }
 
+/* There is a fixed mapping between audio pin node and display port
+ * on current Intel platforms:
+ * Pin Widget 5 - PORT B (port = 1 in i915 driver)
+ * Pin Widget 6 - PORT C (port = 2 in i915 driver)
+ * Pin Widget 7 - PORT D (port = 3 in i915 driver)
+ */
+static int intel_pin2port(hda_nid_t pin_nid)
+{
+	return pin_nid - 4;
+}
+
 /*
  * HDA PCM callbacks
  */
@@ -1580,7 +1593,9 @@  static void update_eld(struct hda_codec *codec,
 			       &per_pin->eld_ctl->id);
 }
 
-static bool hdmi_present_sense(struct hdmi_spec_per_pin *per_pin, int repoll)
+/* update ELD and jack state via HD-audio verbs */
+static bool hdmi_present_sense_via_verbs(struct hdmi_spec_per_pin *per_pin,
+					 int repoll)
 {
 	struct hda_jack_tbl *jack;
 	struct hda_codec *codec = per_pin->codec;
@@ -1641,16 +1656,71 @@  static bool hdmi_present_sense(struct hdmi_spec_per_pin *per_pin, int repoll)
 	return ret;
 }
 
+/* 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));
+			size = min(size, ELD_MAX_SIZE);
+			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 bool hdmi_present_sense(struct hdmi_spec_per_pin *per_pin, int repoll)
+{
+	struct hda_codec *codec = per_pin->codec;
+	struct hdmi_spec *spec = codec->spec;
+
+	if (spec->use_acomp) {
+		sync_eld_via_acomp(codec, per_pin);
+		return false; /* don't call snd_hda_jack_report_sync() */
+	} else {
+		return hdmi_present_sense_via_verbs(per_pin, repoll);
+	}
+}
+
 static void hdmi_repoll_eld(struct work_struct *work)
 {
 	struct hdmi_spec_per_pin *per_pin =
 	container_of(to_delayed_work(work), struct hdmi_spec_per_pin, work);
+	struct hda_codec *codec = per_pin->codec;
+	struct hdmi_spec *spec = codec->spec;
 
-	if (per_pin->repoll_count++ > 6)
+	/* no repoll for audio component; or no more if it's over 6 times */
+	if (spec->use_acomp || per_pin->repoll_count++ > 6)
 		per_pin->repoll_count = 0;
 
 	if (hdmi_present_sense(per_pin, per_pin->repoll_count))
-		snd_hda_jack_report_sync(per_pin->codec);
+		snd_hda_jack_report_sync(codec);
 }
 
 static void intel_haswell_fixup_connect_list(struct hda_codec *codec,
@@ -1776,17 +1846,6 @@  static bool check_non_pcm_per_cvt(struct hda_codec *codec, hda_nid_t cvt_nid)
 	return non_pcm;
 }
 
-/* There is a fixed mapping between audio pin node and display port
- * on current Intel platforms:
- * Pin Widget 5 - PORT B (port = 1 in i915 driver)
- * Pin Widget 6 - PORT C (port = 2 in i915 driver)
- * Pin Widget 7 - PORT D (port = 3 in i915 driver)
- */
-static int intel_pin2port(hda_nid_t pin_nid)
-{
-	return pin_nid - 4;
-}
-
 /*
  * HDMI callbacks
  */
@@ -2091,6 +2150,30 @@  static int generic_hdmi_build_pcms(struct hda_codec *codec)
 	return 0;
 }
 
+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 +2184,8 @@  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 +2281,8 @@  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 +2306,7 @@  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 +2314,8 @@  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);
@@ -2350,7 +2439,13 @@  static void haswell_set_power_state(struct hda_codec *codec, hda_nid_t fg,
 static void intel_pin_eld_notify(void *audio_ptr, int port)
 {
 	struct hda_codec *codec = audio_ptr;
+	struct hdmi_spec *spec = codec->spec;
+	struct hdmi_spec_per_pin *per_pin;
 	int pin_nid = port + 0x04;
+	int pin_idx = pin_nid_to_pin_index(codec, pin_nid);
+
+	if (pin_idx < 0)
+		return;
 
 	/* skip notification during system suspend (but not in runtime PM);
 	 * the state will be updated at resume
@@ -2358,7 +2453,9 @@  static void intel_pin_eld_notify(void *audio_ptr, int port)
 	if (snd_power_get_state(codec->card) != SNDRV_CTL_POWER_D0)
 		return;
 
-	check_presence_and_report(codec, pin_nid);
+	/* execute ELD update in a work for avoiding a deadlock */
+	per_pin = get_pin(spec, pin_idx);
+	schedule_delayed_work(&per_pin->work, 0);
 }
 
 static int patch_generic_hdmi(struct hda_codec *codec)
@@ -2388,7 +2485,9 @@  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;