ALSA: hda - Allow multiple callbacks for jack

So far, hda_jack infrastructure allows only one callback per jack, and
this makes things slightly complicated when a driver wants to assign
multiple tasks to a jack, e.g. the standard auto-mute with a power
up/down sequence.  This can be simplified if the hda_jack accepts
multiple callbacks.

This patch is such an extension: the callback-specific part (the
function and private_data) is split to another struct from
hda_jack_tbl, and multiple such objects can be assigned to a single
hda_jack_tbl entry.

The new struct hda_jack_callback is passed to each callback function
now, thus the patch became bigger than expected.  But these changes
are mostly trivial.
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/pci/hda/hda_generic.c

@@ -2032,7 +2032,8 @@ static int create_speaker_out_ctls(struct hda_codec *codec)
  * independent HP controls
  */
 
-static void call_hp_automute(struct hda_codec *codec, struct hda_jack_tbl *jack);
+static void call_hp_automute(struct hda_codec *codec,
+			     struct hda_jack_callback *jack);
 static int indep_hp_info(struct snd_kcontrol *kcontrol,
 			 struct snd_ctl_elem_info *uinfo)
 {
@@ -3948,7 +3949,8 @@ static void call_update_outputs(struct hda_codec *codec)
 }
 
 /* standard HP-automute helper */
-void snd_hda_gen_hp_automute(struct hda_codec *codec, struct hda_jack_tbl *jack)
+void snd_hda_gen_hp_automute(struct hda_codec *codec,
+			     struct hda_jack_callback *jack)
 {
 	struct hda_gen_spec *spec = codec->spec;
 	hda_nid_t *pins = spec->autocfg.hp_pins;
@@ -3968,7 +3970,8 @@ void snd_hda_gen_hp_automute(struct hda_codec *codec, struct hda_jack_tbl *jack)
 EXPORT_SYMBOL_GPL(snd_hda_gen_hp_automute);
 
 /* standard line-out-automute helper */
-void snd_hda_gen_line_automute(struct hda_codec *codec, struct hda_jack_tbl *jack)
+void snd_hda_gen_line_automute(struct hda_codec *codec,
+			       struct hda_jack_callback *jack)
 {
 	struct hda_gen_spec *spec = codec->spec;
 
@@ -3988,7 +3991,8 @@ void snd_hda_gen_line_automute(struct hda_codec *codec, struct hda_jack_tbl *jac
 EXPORT_SYMBOL_GPL(snd_hda_gen_line_automute);
 
 /* standard mic auto-switch helper */
-void snd_hda_gen_mic_autoswitch(struct hda_codec *codec, struct hda_jack_tbl *jack)
+void snd_hda_gen_mic_autoswitch(struct hda_codec *codec,
+				struct hda_jack_callback *jack)
 {
 	struct hda_gen_spec *spec = codec->spec;
 	int i;
@@ -4011,7 +4015,8 @@ void snd_hda_gen_mic_autoswitch(struct hda_codec *codec, struct hda_jack_tbl *ja
 EXPORT_SYMBOL_GPL(snd_hda_gen_mic_autoswitch);
 
 /* call appropriate hooks */
-static void call_hp_automute(struct hda_codec *codec, struct hda_jack_tbl *jack)
+static void call_hp_automute(struct hda_codec *codec,
+			     struct hda_jack_callback *jack)
 {
 	struct hda_gen_spec *spec = codec->spec;
 	if (spec->hp_automute_hook)
@@ -4021,7 +4026,7 @@ static void call_hp_automute(struct hda_codec *codec, struct hda_jack_tbl *jack)
 }
 
 static void call_line_automute(struct hda_codec *codec,
-			       struct hda_jack_tbl *jack)
+			       struct hda_jack_callback *jack)
 {
 	struct hda_gen_spec *spec = codec->spec;
 	if (spec->line_automute_hook)
@@ -4031,7 +4036,7 @@ static void call_line_automute(struct hda_codec *codec,
 }
 
 static void call_mic_autoswitch(struct hda_codec *codec,
-				struct hda_jack_tbl *jack)
+				struct hda_jack_callback *jack)
 {
 	struct hda_gen_spec *spec = codec->spec;
 	if (spec->mic_autoswitch_hook)

sound/pci/hda/hda_generic.h

@@ -284,11 +284,11 @@ struct hda_gen_spec {
 
 	/* automute / autoswitch hooks */
 	void (*hp_automute_hook)(struct hda_codec *codec,
-				 struct hda_jack_tbl *tbl);
+				 struct hda_jack_callback *cb);
 	void (*line_automute_hook)(struct hda_codec *codec,
-				   struct hda_jack_tbl *tbl);
+				   struct hda_jack_callback *cb);
 	void (*mic_autoswitch_hook)(struct hda_codec *codec,
-				    struct hda_jack_tbl *tbl);
+				    struct hda_jack_callback *cb);
 };
 
 int snd_hda_gen_spec_init(struct hda_gen_spec *spec);
@@ -320,11 +320,11 @@ int snd_hda_gen_build_pcms(struct hda_codec *codec);
 
 /* standard jack event callbacks */
 void snd_hda_gen_hp_automute(struct hda_codec *codec,
-			     struct hda_jack_tbl *jack);
+			     struct hda_jack_callback *jack);
 void snd_hda_gen_line_automute(struct hda_codec *codec,
-			       struct hda_jack_tbl *jack);
+			       struct hda_jack_callback *jack);
 void snd_hda_gen_mic_autoswitch(struct hda_codec *codec,
-				struct hda_jack_tbl *jack);
+				struct hda_jack_callback *jack);
 void snd_hda_gen_update_outputs(struct hda_codec *codec);
 
 #ifdef CONFIG_PM

sound/pci/hda/hda_jack.c

@@ -111,17 +111,21 @@ snd_hda_jack_tbl_new(struct hda_codec *codec, hda_nid_t nid)
 
 void snd_hda_jack_tbl_clear(struct hda_codec *codec)
 {
+	struct hda_jack_tbl *jack = codec->jacktbl.list;
+	int i;
+
+	for (i = 0; i < codec->jacktbl.used; i++, jack++) {
+		struct hda_jack_callback *cb, *next;
 #ifdef CONFIG_SND_HDA_INPUT_JACK
-	/* free jack instances manually when clearing/reconfiguring */
-	if (!codec->bus->shutdown && codec->jacktbl.list) {
-		struct hda_jack_tbl *jack = codec->jacktbl.list;
-		int i;
-		for (i = 0; i < codec->jacktbl.used; i++, jack++) {
-			if (jack->jack)
-				snd_device_free(codec->bus->card, jack->jack);
+		/* free jack instances manually when clearing/reconfiguring */
+		if (!codec->bus->shutdown && jack->jack)
+			snd_device_free(codec->bus->card, jack->jack);
+#endif
+		for (cb = jack->callback; cb; cb = next) {
+			next = cb->next;
+			kfree(cb);
 		}
 	}
-#endif
 	snd_array_free(&codec->jacktbl);
 }
 
@@ -219,28 +223,38 @@ EXPORT_SYMBOL_GPL(snd_hda_jack_detect_state);
  * errno.  Check and handle the return value appropriately with standard
  * macros such as @IS_ERR() and @PTR_ERR().
  */
-struct hda_jack_tbl *
+struct hda_jack_callback *
 snd_hda_jack_detect_enable_callback(struct hda_codec *codec, hda_nid_t nid,
-				    hda_jack_callback cb)
+				    hda_jack_callback_fn func)
 {
-	struct hda_jack_tbl *jack = snd_hda_jack_tbl_new(codec, nid);
+	struct hda_jack_tbl *jack;
+	struct hda_jack_callback *callback = NULL;
 	int err;
 
+	jack = snd_hda_jack_tbl_new(codec, nid);
 	if (!jack)
 		return ERR_PTR(-ENOMEM);
+	if (func) {
+		callback = kzalloc(sizeof(*callback), GFP_KERNEL);
+		if (!callback)
+			return ERR_PTR(-ENOMEM);
+		callback->func = func;
+		callback->tbl = jack;
+		callback->next = jack->callback;
+		jack->callback = callback;
+	}
+
 	if (jack->jack_detect)
-		return jack; /* already registered */
+		return callback; /* already registered */
 	jack->jack_detect = 1;
-	if (cb)
-		jack->callback = cb;
 	if (codec->jackpoll_interval > 0)
-		return jack; /* No unsol if we're polling instead */
+		return callback; /* No unsol if we're polling instead */
 	err = snd_hda_codec_write_cache(codec, nid, 0,
 					 AC_VERB_SET_UNSOLICITED_ENABLE,
 					 AC_USRSP_EN | jack->tag);
 	if (err < 0)
 		return ERR_PTR(err);
-	return jack;
+	return callback;
 }
 EXPORT_SYMBOL_GPL(snd_hda_jack_detect_enable_callback);
 
@@ -503,13 +517,17 @@ EXPORT_SYMBOL_GPL(snd_hda_jack_add_kctls);
 static void call_jack_callback(struct hda_codec *codec,
 			       struct hda_jack_tbl *jack)
 {
-	if (jack->callback)
-		jack->callback(codec, jack);
+	struct hda_jack_callback *cb;
+
+	for (cb = jack->callback; cb; cb = cb->next)
+		cb->func(codec, cb);
 	if (jack->gated_jack) {
 		struct hda_jack_tbl *gated =
 			snd_hda_jack_tbl_get(codec, jack->gated_jack);
-		if (gated && gated->callback)
-			gated->callback(codec, gated);
+		if (gated) {
+			for (cb = gated->callback; cb; cb = cb->next)
+				cb->func(codec, cb);
+		}
 	}
 }
 

sound/pci/hda/hda_jack.h

@@ -14,14 +14,21 @@
 
 struct auto_pin_cfg;
 struct hda_jack_tbl;
+struct hda_jack_callback;
 
-typedef void (*hda_jack_callback) (struct hda_codec *, struct hda_jack_tbl *);
+typedef void (*hda_jack_callback_fn) (struct hda_codec *, struct hda_jack_callback *);
+
+struct hda_jack_callback {
+	struct hda_jack_tbl *tbl;
+	hda_jack_callback_fn func;
+	unsigned int private_data;	/* arbitrary data */
+	struct hda_jack_callback *next;
+};
 
 struct hda_jack_tbl {
 	hda_nid_t nid;
 	unsigned char tag;		/* unsol event tag */
-	unsigned int private_data;	/* arbitrary data */
-	hda_jack_callback callback;
+	struct hda_jack_callback *callback;
 	/* jack-detection stuff */
 	unsigned int pin_sense;		/* cached pin-sense value */
 	unsigned int jack_detect:1;	/* capable of jack-detection? */
@@ -47,9 +54,9 @@ void snd_hda_jack_tbl_clear(struct hda_codec *codec);
 void snd_hda_jack_set_dirty_all(struct hda_codec *codec);
 
 int snd_hda_jack_detect_enable(struct hda_codec *codec, hda_nid_t nid);
-struct hda_jack_tbl *
+struct hda_jack_callback *
 snd_hda_jack_detect_enable_callback(struct hda_codec *codec, hda_nid_t nid,
-				    hda_jack_callback cb);
+				    hda_jack_callback_fn cb);
 
 int snd_hda_jack_set_gating_jack(struct hda_codec *codec, hda_nid_t gated_nid,
 				 hda_nid_t gating_nid);

sound/pci/hda/patch_cirrus.c

@@ -982,7 +982,7 @@ static void cs4210_pinmux_init(struct hda_codec *codec)
 }
 
 static void cs4210_spdif_automute(struct hda_codec *codec,
-				  struct hda_jack_tbl *tbl)
+				  struct hda_jack_callback *tbl)
 {
 	struct cs_spec *spec = codec->spec;
 	bool spdif_present = false;

sound/pci/hda/patch_conexant.c

@@ -393,7 +393,8 @@ static void olpc_xo_update_mic_pins(struct hda_codec *codec)
 }
 
 /* mic_autoswitch hook */
-static void olpc_xo_automic(struct hda_codec *codec, struct hda_jack_tbl *jack)
+static void olpc_xo_automic(struct hda_codec *codec,
+			    struct hda_jack_callback *jack)
 {
 	struct conexant_spec *spec = codec->spec;
 	int saved_cached_write = codec->cached_write;

sound/pci/hda/patch_hdmi.c

@@ -1163,17 +1163,23 @@ static void hdmi_setup_audio_infoframe(struct hda_codec *codec,
 
 static bool hdmi_present_sense(struct hdmi_spec_per_pin *per_pin, int repoll);
 
-static void jack_callback(struct hda_codec *codec, struct hda_jack_tbl *jack)
+static void check_presence_and_report(struct hda_codec *codec, hda_nid_t nid)
 {
 	struct hdmi_spec *spec = codec->spec;
-	int pin_idx = pin_nid_to_pin_index(codec, jack->nid);
+	int pin_idx = pin_nid_to_pin_index(codec, nid);
+
 	if (pin_idx < 0)
 		return;
-
 	if (hdmi_present_sense(get_pin(spec, pin_idx), 1))
 		snd_hda_jack_report_sync(codec);
 }
 
+static void jack_callback(struct hda_codec *codec,
+			  struct hda_jack_callback *jack)
+{
+	check_presence_and_report(codec, jack->tbl->nid);
+}
+
 static void hdmi_intrinsic_event(struct hda_codec *codec, unsigned int res)
 {
 	int tag = res >> AC_UNSOL_RES_TAG_SHIFT;
@@ -1190,7 +1196,7 @@ static void hdmi_intrinsic_event(struct hda_codec *codec, unsigned int res)
 		codec->addr, jack->nid, dev_entry, !!(res & AC_UNSOL_RES_IA),
 		!!(res & AC_UNSOL_RES_PD), !!(res & AC_UNSOL_RES_ELDV));
 
-	jack_callback(codec, jack);
+	check_presence_and_report(codec, jack->nid);
 }
 
 static void hdmi_non_intrinsic_event(struct hda_codec *codec, unsigned int res)

sound/pci/hda/patch_realtek.c

@@ -264,7 +264,8 @@ static void alc_fix_pll_init(struct hda_codec *codec, hda_nid_t nid,
 }
 
 /* update the master volume per volume-knob's unsol event */
-static void alc_update_knob_master(struct hda_codec *codec, struct hda_jack_tbl *jack)
+static void alc_update_knob_master(struct hda_codec *codec,
+				   struct hda_jack_callback *jack)
 {
 	unsigned int val;
 	struct snd_kcontrol *kctl;
@@ -276,7 +277,7 @@ static void alc_update_knob_master(struct hda_codec *codec, struct hda_jack_tbl
 	uctl = kzalloc(sizeof(*uctl), GFP_KERNEL);
 	if (!uctl)
 		return;
-	val = snd_hda_codec_read(codec, jack->nid, 0,
+	val = snd_hda_codec_read(codec, jack->tbl->nid, 0,
 				 AC_VERB_GET_VOLUME_KNOB_CONTROL, 0);
 	val &= HDA_AMP_VOLMASK;
 	uctl->value.integer.value[0] = val;
@@ -3272,7 +3273,7 @@ static void alc269_fixup_quanta_mute(struct hda_codec *codec,
 }
 
 static void alc269_x101_hp_automute_hook(struct hda_codec *codec,
-					 struct hda_jack_tbl *jack)
+					 struct hda_jack_callback *jack)
 {
 	struct alc_spec *spec = codec->spec;
 	int vref;
@@ -3926,7 +3927,8 @@ static void alc_update_headset_mode_hook(struct hda_codec *codec,
 	alc_update_headset_mode(codec);
 }
 
-static void alc_update_headset_jack_cb(struct hda_codec *codec, struct hda_jack_tbl *jack)
+static void alc_update_headset_jack_cb(struct hda_codec *codec,
+				       struct hda_jack_callback *jack)
 {
 	struct alc_spec *spec = codec->spec;
 	spec->current_headset_type = ALC_HEADSET_TYPE_UNKNOWN;
@@ -4166,7 +4168,7 @@ static void alc269_fixup_limit_int_mic_boost(struct hda_codec *codec,
 }
 
 static void alc283_hp_automute_hook(struct hda_codec *codec,
-				    struct hda_jack_tbl *jack)
+				    struct hda_jack_callback *jack)
 {
 	struct alc_spec *spec = codec->spec;
 	int vref;

sound/pci/hda/patch_sigmatel.c

@@ -481,7 +481,7 @@ static void stac_toggle_power_map(struct hda_codec *codec, hda_nid_t nid,
 
 /* update power bit per jack plug/unplug */
 static void jack_update_power(struct hda_codec *codec,
-			      struct hda_jack_tbl *jack)
+			      struct hda_jack_callback *jack)
 {
 	struct sigmatel_spec *spec = codec->spec;
 	int i;
@@ -489,9 +489,9 @@ static void jack_update_power(struct hda_codec *codec,
 	if (!spec->num_pwrs)
 		return;
 
-	if (jack && jack->nid) {
-		stac_toggle_power_map(codec, jack->nid,
-				      snd_hda_jack_detect(codec, jack->nid),
+	if (jack && jack->tbl->nid) {
+		stac_toggle_power_map(codec, jack->tbl->nid,
+				      snd_hda_jack_detect(codec, jack->tbl->nid),
 				      true);
 		return;
 	}
@@ -499,8 +499,7 @@ static void jack_update_power(struct hda_codec *codec,
 	/* update all jacks */
 	for (i = 0; i < spec->num_pwrs; i++) {
 		hda_nid_t nid = spec->pwr_nids[i];
-		jack = snd_hda_jack_tbl_get(codec, nid);
-		if (!jack)
+		if (!snd_hda_jack_tbl_get(codec, nid))
 			continue;
 		stac_toggle_power_map(codec, nid,
 				      snd_hda_jack_detect(codec, nid),
@@ -512,27 +511,28 @@ static void jack_update_power(struct hda_codec *codec,
 }
 
 static void stac_hp_automute(struct hda_codec *codec,
-				 struct hda_jack_tbl *jack)
+				 struct hda_jack_callback *jack)
 {
 	snd_hda_gen_hp_automute(codec, jack);
 	jack_update_power(codec, jack);
 }
 
 static void stac_line_automute(struct hda_codec *codec,
-				   struct hda_jack_tbl *jack)
+				   struct hda_jack_callback *jack)
 {
 	snd_hda_gen_line_automute(codec, jack);
 	jack_update_power(codec, jack);
 }
 
 static void stac_mic_autoswitch(struct hda_codec *codec,
-				struct hda_jack_tbl *jack)
+				struct hda_jack_callback *jack)
 {
 	snd_hda_gen_mic_autoswitch(codec, jack);
 	jack_update_power(codec, jack);
 }
 
-static void stac_vref_event(struct hda_codec *codec, struct hda_jack_tbl *event)
+static void stac_vref_event(struct hda_codec *codec,
+			    struct hda_jack_callback *event)
 {
 	unsigned int data;
 
@@ -3011,7 +3011,7 @@ static void stac92hd71bxx_fixup_hp_m4(struct hda_codec *codec,
 				      const struct hda_fixup *fix, int action)
 {
 	struct sigmatel_spec *spec = codec->spec;
-	struct hda_jack_tbl *jack;
+	struct hda_jack_callback *jack;
 
 	if (action != HDA_FIXUP_ACT_PRE_PROBE)
 		return;
@@ -4033,7 +4033,7 @@ static void stac9205_fixup_dell_m43(struct hda_codec *codec,
 				    const struct hda_fixup *fix, int action)
 {
 	struct sigmatel_spec *spec = codec->spec;
-	struct hda_jack_tbl *jack;
+	struct hda_jack_callback *jack;
 
 	if (action == HDA_FIXUP_ACT_PRE_PROBE) {
 		snd_hda_apply_pincfgs(codec, dell_9205_m43_pin_configs);

sound/pci/hda/patch_via.c

@@ -118,7 +118,7 @@ static void via_playback_pcm_hook(struct hda_pcm_stream *hinfo,
 				  struct hda_codec *codec,
 				  struct snd_pcm_substream *substream,
 				  int action);
-static void via_hp_automute(struct hda_codec *codec, struct hda_jack_tbl *tbl);
+static void via_hp_automute(struct hda_codec *codec, struct hda_jack_callback *tbl);
 
 static struct via_spec *via_new_spec(struct hda_codec *codec)
 {
@@ -575,19 +575,22 @@ static const struct snd_kcontrol_new vt1708_jack_detect_ctl[] = {
 	{} /* terminator */
 };
 
-static void via_hp_automute(struct hda_codec *codec, struct hda_jack_tbl *tbl)
+static void via_hp_automute(struct hda_codec *codec,
+			    struct hda_jack_callback *tbl)
 {
 	set_widgets_power_state(codec);
 	snd_hda_gen_hp_automute(codec, tbl);
 }
 
-static void via_line_automute(struct hda_codec *codec, struct hda_jack_tbl *tbl)
+static void via_line_automute(struct hda_codec *codec,
+			      struct hda_jack_callback *tbl)
 {
 	set_widgets_power_state(codec);
 	snd_hda_gen_line_automute(codec, tbl);
 }
 
-static void via_jack_powerstate_event(struct hda_codec *codec, struct hda_jack_tbl *tbl)
+static void via_jack_powerstate_event(struct hda_codec *codec,
+				      struct hda_jack_callback *tbl)
 {
 	set_widgets_power_state(codec);
 }