ALSA: hda - Add DP-MST jack support

This patch adds DP-MST jack support which will be used on NVIDIA
platforms. Today, DP-MST audio is supported only if the codec has
acomp support. This patch makes it possible to add DP-MST support
for non-acomp codecs.

For the codecs supporting DP-MST audio, each pin can contain several
device entries. Each device entry is a virtual pin, described by
pin_nid and dev_id in struct hdmi_spec_per_pin. For monitor hotplug
event handling, non-acomp codecs enable and register jack-detection
for every hdmi_spec_per_pin.

This patch updates every relevant function in hda_jack.h and its
implementation in hda_jack.c, to consider dev_id along with pin_nid.

Changes to the HD Audio specification to support DP-MST audio are
described in the Intel Document Change Notification (DCN) number
HDA040-A.

From HDA040-A, "For the case of multi stream capable Digital Display
Pin Widget, [the Get Pin Sense verb] can be used to read a specific
Device Entry state as reported in Get Device List Entry verb." This
patch updates the read_pin_sense() function to take the dev_id as an
argument and pass it as a parameter to the Get Pin Sense verb.

Bits 15 through 20 from the Unsolicited Response for intrinsic
events contain the index of the Device Entry that generated the
event. This patch updates the Unsolicited Response event handlers to
extract the device entry index from the response and pass it to
snd_hda_jack_tbl_get_from_tag().

This patch updates snd_hda_jack_tbl_new() to take a dev_id argument
and store it in the jack structure, and to make sure not to generate
a different tag when called more than once for the same nid.

Signed-off-by: Nikhil Mahale <nmahale@nvidia.com>
Link: https://lore.kernel.org/r/20191119084710.29267-3-nmahale@nvidia.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 42 insertions, 28 deletions

diff --git a/sound/pci/hda/patch_hdmi.c b/sound/pci/hda/patch_hdmi.c
index 3b1b978201a9..37b4345afdde 100644
--- a/sound/pci/hda/patch_hdmi.c
+++ b/sound/pci/hda/patch_hdmi.c
@@ -758,34 +758,32 @@ static void jack_callback(struct hda_codec *codec,
 	if (codec_has_acomp(codec))
 		return;
 
-	/* hda_jack don't support DP MST */
-	check_presence_and_report(codec, jack->nid, 0);
+	check_presence_and_report(codec, jack->nid, jack->dev_id);
 }
 
 static void hdmi_intrinsic_event(struct hda_codec *codec, unsigned int res)
 {
 	int tag = res >> AC_UNSOL_RES_TAG_SHIFT;
 	struct hda_jack_tbl *jack;
-	int dev_entry = (res & AC_UNSOL_RES_DE) >> AC_UNSOL_RES_DE_SHIFT;
 
-	/*
-	 * assume DP MST uses dyn_pcm_assign and acomp and
-	 * never comes here
-	 * if DP MST supports unsol event, below code need
-	 * consider dev_entry
-	 */
-	jack = snd_hda_jack_tbl_get_from_tag(codec, tag);
+	if (codec->dp_mst) {
+		int dev_entry =
+			(res & AC_UNSOL_RES_DE) >> AC_UNSOL_RES_DE_SHIFT;
+
+		jack = snd_hda_jack_tbl_get_from_tag(codec, tag, dev_entry);
+	} else {
+		jack = snd_hda_jack_tbl_get_from_tag(codec, tag, 0);
+	}
 	if (!jack)
 		return;
 	jack->jack_dirty = 1;
 
 	codec_dbg(codec,
 		"HDMI hot plug event: Codec=%d Pin=%d Device=%d Inactive=%d Presence_Detect=%d ELD_Valid=%d\n",
-		codec->addr, jack->nid, dev_entry, !!(res & AC_UNSOL_RES_IA),
+		codec->addr, jack->nid, jack->dev_id, !!(res & AC_UNSOL_RES_IA),
 		!!(res & AC_UNSOL_RES_PD), !!(res & AC_UNSOL_RES_ELDV));
 
-	/* hda_jack don't support DP MST */
-	check_presence_and_report(codec, jack->nid, 0);
+	check_presence_and_report(codec, jack->nid, jack->dev_id);
 }
 
 static void hdmi_non_intrinsic_event(struct hda_codec *codec, unsigned int res)
@@ -815,11 +813,21 @@ static void hdmi_unsol_event(struct hda_codec *codec, unsigned int res)
 {
 	int tag = res >> AC_UNSOL_RES_TAG_SHIFT;
 	int subtag = (res & AC_UNSOL_RES_SUBTAG) >> AC_UNSOL_RES_SUBTAG_SHIFT;
+	struct hda_jack_tbl *jack;
 
 	if (codec_has_acomp(codec))
 		return;
 
-	if (!snd_hda_jack_tbl_get_from_tag(codec, tag)) {
+	if (codec->dp_mst) {
+		int dev_entry =
+			(res & AC_UNSOL_RES_DE) >> AC_UNSOL_RES_DE_SHIFT;
+
+		jack = snd_hda_jack_tbl_get_from_tag(codec, tag, dev_entry);
+	} else {
+		jack = snd_hda_jack_tbl_get_from_tag(codec, tag, 0);
+	}
+
+	if (!jack) {
 		codec_dbg(codec, "Unexpected HDMI event tag 0x%x\n", tag);
 		return;
 	}
@@ -1505,7 +1513,7 @@ static bool hdmi_present_sense_via_verbs(struct hdmi_spec_per_pin *per_pin,
 	bool ret;
 	bool do_repoll = false;
 
-	present = snd_hda_jack_pin_sense(codec, pin_nid);
+	present = snd_hda_jack_pin_sense(codec, pin_nid, per_pin->dev_id);
 
 	mutex_lock(&per_pin->lock);
 	eld->monitor_present = !!(present & AC_PINSENSE_PRESENCE);
@@ -1538,7 +1546,7 @@ static bool hdmi_present_sense_via_verbs(struct hdmi_spec_per_pin *per_pin,
 
 	ret = !repoll || !eld->monitor_present || eld->eld_valid;
 
-	jack = snd_hda_jack_tbl_get(codec, pin_nid);
+	jack = snd_hda_jack_tbl_get_mst(codec, pin_nid, per_pin->dev_id);
 	if (jack) {
 		jack->block_report = !ret;
 		jack->pin_sense = (eld->monitor_present && eld->eld_valid) ?
@@ -1569,7 +1577,8 @@ static struct snd_jack *pin_idx_to_jack(struct hda_codec *codec,
 		 * DP MST will use dyn_pcm_assign,
 		 * so DP MST will never come here
 		 */
-		jack_tbl = snd_hda_jack_tbl_get(codec, per_pin->pin_nid);
+		jack_tbl = snd_hda_jack_tbl_get_mst(codec, per_pin->pin_nid,
+						    per_pin->dev_id);
 		if (jack_tbl)
 			jack = jack_tbl->jack;
 	}
@@ -1650,7 +1659,8 @@ static void hdmi_repoll_eld(struct work_struct *work)
 	struct hdmi_spec *spec = codec->spec;
 	struct hda_jack_tbl *jack;
 
-	jack = snd_hda_jack_tbl_get(codec, per_pin->pin_nid);
+	jack = snd_hda_jack_tbl_get_mst(codec, per_pin->pin_nid,
+					per_pin->dev_id);
 	if (jack)
 		jack->jack_dirty = 1;
 
@@ -2151,11 +2161,13 @@ static int generic_hdmi_build_jack(struct hda_codec *codec, int pcm_idx)
 	if (phantom_jack)
 		strncat(hdmi_str, " Phantom",
 			sizeof(hdmi_str) - strlen(hdmi_str) - 1);
-	ret = snd_hda_jack_add_kctl(codec, per_pin->pin_nid, hdmi_str,
-				    phantom_jack, 0, NULL);
+	ret = snd_hda_jack_add_kctl_mst(codec, per_pin->pin_nid,
+					per_pin->dev_id, hdmi_str, phantom_jack,
+					0, NULL);
 	if (ret < 0)
 		return ret;
-	jack = snd_hda_jack_tbl_get(codec, per_pin->pin_nid);
+	jack = snd_hda_jack_tbl_get_mst(codec, per_pin->pin_nid,
+					per_pin->dev_id);
 	if (jack == NULL)
 		return 0;
 	/* assign jack->jack to pcm_rec[].jack to
@@ -2264,10 +2276,11 @@ static int generic_hdmi_init(struct hda_codec *codec)
 		if (codec_has_acomp(codec))
 			continue;
 		if (spec->use_jack_detect)
-			snd_hda_jack_detect_enable(codec, pin_nid);
+			snd_hda_jack_detect_enable(codec, pin_nid, dev_id);
 		else
-			snd_hda_jack_detect_enable_callback(codec, pin_nid,
-							    jack_callback);
+			snd_hda_jack_detect_enable_callback_mst(codec, pin_nid,
+								dev_id,
+								jack_callback);
 	}
 	mutex_unlock(&spec->bind_lock);
 	return 0;
@@ -2417,11 +2430,11 @@ static int patch_generic_hdmi(struct hda_codec *codec)
 
 /* turn on / off the unsol event jack detection dynamically */
 static void reprogram_jack_detect(struct hda_codec *codec, hda_nid_t nid,
-				  bool use_acomp)
+				  int dev_id, bool use_acomp)
 {
 	struct hda_jack_tbl *tbl;
 
-	tbl = snd_hda_jack_tbl_get(codec, nid);
+	tbl = snd_hda_jack_tbl_get_mst(codec, nid, dev_id);
 	if (tbl) {
 		/* clear unsol even if component notifier is used, or re-enable
 		 * if notifier is cleared
@@ -2434,7 +2447,7 @@ static void reprogram_jack_detect(struct hda_codec *codec, hda_nid_t nid,
 		 * at need (i.e. only when notifier is cleared)
 		 */
 		if (!use_acomp)
-			snd_hda_jack_detect_enable(codec, nid);
+			snd_hda_jack_detect_enable(codec, nid, dev_id);
 	}
 }
 
@@ -2454,6 +2467,7 @@ static void generic_acomp_notifier_set(struct drm_audio_component *acomp,
 		for (i = 0; i < spec->num_pins; i++)
 			reprogram_jack_detect(spec->codec,
 					      get_pin(spec, i)->pin_nid,
+					      get_pin(spec, i)->dev_id,
 					      use_acomp);
 	}
 	mutex_unlock(&spec->bind_lock);
@@ -2959,7 +2973,7 @@ static int simple_playback_init(struct hda_codec *codec)
 	if (get_wcaps(codec, pin) & AC_WCAP_OUT_AMP)
 		snd_hda_codec_write(codec, pin, 0, AC_VERB_SET_AMP_GAIN_MUTE,
 				    AMP_OUT_UNMUTE);
-	snd_hda_jack_detect_enable(codec, pin);
+	snd_hda_jack_detect_enable(codec, pin, per_pin->dev_id);
 	return 0;
 }