ALSA: hda - add beep_mode module parameter

The beep_mode parameter for snd-hda-intel module allows to choose among
different digital beep device registation to the input layer.

0 = do not register to the input layer
1 = register to the input layer all time
2 = use "Beep Switch" control exported to user space mixer applications

Also, introduce CONFIG_SND_HDA_INPUT_BEEP_MODE for default value.
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/pci/hda/Kconfig

@@ -38,6 +38,17 @@ config SND_HDA_INPUT_BEEP
 	  Say Y here to build a digital beep interface for HD-audio
 	  driver. This interface is used to generate digital beeps.
 
+config SND_HDA_INPUT_BEEP_MODE
+	int "Digital beep registration mode (0=off, 1=on, 2=mute sw on/off)"
+	depends on SND_HDA_INPUT_BEEP=y
+	default "1"
+	range 0 2
+	help
+	  Set 0 to disable the digital beep interface for HD-audio by default.
+	  Set 1 to always enable the digital beep interface for HD-audio by
+	  default. Set 2 to control the beep device registration to input
+	  layer using a "Beep Switch" in mixer applications.
+
 config SND_HDA_INPUT_JACK
 	bool "Support jack plugging notification via input layer"
 	depends on INPUT=y || INPUT=SND_HDA_INTEL

sound/pci/hda/hda_beep.c

@@ -190,14 +190,19 @@ int snd_hda_enable_beep_device(struct hda_codec *codec, int enable)
 		return 0;
 	if (beep->enabled != enable) {
 		beep->enabled = enable;
-		if (enable) {
-			cancel_delayed_work(&beep->unregister_work);
-			schedule_work(&beep->register_work);
-		} else {
+		if (!enable) {
 			/* turn off beep */
 			snd_hda_codec_write_cache(beep->codec, beep->nid, 0,
 						  AC_VERB_SET_BEEP_CONTROL, 0);
-			schedule_delayed_work(&beep->unregister_work, HZ);
+		}
+		if (beep->mode == HDA_BEEP_MODE_SWREG) {
+			if (enable) {
+				cancel_delayed_work(&beep->unregister_work);
+				schedule_work(&beep->register_work);
+			} else {
+				schedule_delayed_work(&beep->unregister_work,
+									   HZ);
+			}
 		}
 		return 1;
 	}
@@ -223,6 +228,7 @@ int snd_hda_attach_beep_device(struct hda_codec *codec, int nid)
 
 	beep->nid = nid;
 	beep->codec = codec;
+	beep->mode = codec->beep_mode;
 	codec->beep = beep;
 
 	INIT_WORK(&beep->register_work, &snd_hda_do_register);
@@ -230,6 +236,11 @@ int snd_hda_attach_beep_device(struct hda_codec *codec, int nid)
 	INIT_WORK(&beep->beep_work, &snd_hda_generate_beep);
 	mutex_init(&beep->mutex);
 
+	if (beep->mode == HDA_BEEP_MODE_ON) {
+		beep->enabled = 1;
+		snd_hda_do_register(&beep->register_work);
+	}
+
 	return 0;
 }
 EXPORT_SYMBOL_HDA(snd_hda_attach_beep_device);

sound/pci/hda/hda_beep.h

@@ -24,10 +24,15 @@
 
 #include "hda_codec.h"
 
+#define HDA_BEEP_MODE_ON	0
+#define HDA_BEEP_MODE_OFF	1
+#define HDA_BEEP_MODE_SWREG	2
+
 /* beep information */
 struct hda_beep {
 	struct input_dev *dev;
 	struct hda_codec *codec;
+	unsigned int mode;
 	char phys[32];
 	int tone;
 	hda_nid_t nid;

sound/pci/hda/hda_codec.h

@@ -772,6 +772,7 @@ struct hda_codec {
 
 	/* beep device */
 	struct hda_beep *beep;
+	unsigned int beep_mode;
 
 	/* widget capabilities cache */
 	unsigned int num_nodes;

sound/pci/hda/hda_intel.c

@@ -64,6 +64,10 @@ static int enable_msi = -1;
 #ifdef CONFIG_SND_HDA_PATCH_LOADER
 static char *patch[SNDRV_CARDS];
 #endif
+#ifdef CONFIG_SND_HDA_INPUT_BEEP
+static int beep_mode[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] =
+					CONFIG_SND_HDA_INPUT_BEEP_MODE};
+#endif
 
 module_param_array(index, int, NULL, 0444);
 MODULE_PARM_DESC(index, "Index value for Intel HD audio interface.");
@@ -91,6 +95,11 @@ MODULE_PARM_DESC(enable_msi, "Enable Message Signaled Interrupt (MSI)");
 module_param_array(patch, charp, NULL, 0444);
 MODULE_PARM_DESC(patch, "Patch file for Intel HD audio interface.");
 #endif
+#ifdef CONFIG_SND_HDA_INPUT_BEEP
+module_param_array(beep_mode, int, NULL, 0444);
+MODULE_PARM_DESC(beep_mode, "Select HDA Beep registration mode "
+			    "(0=off, 1=on, 2=mute switch on/off) (default=1).");
+#endif
 
 #ifdef CONFIG_SND_HDA_POWER_SAVE
 static int power_save = CONFIG_SND_HDA_POWER_SAVE_DEFAULT;
@@ -404,6 +413,7 @@ struct azx {
 	unsigned short codec_mask;
 	int  codec_probe_mask; /* copied from probe_mask option */
 	struct hda_bus *bus;
+	unsigned int beep_mode;
 
 	/* CORB/RIRB */
 	struct azx_rb corb;
@@ -1404,6 +1414,7 @@ static int __devinit azx_codec_create(struct azx *chip, const char *model)
 			err = snd_hda_codec_new(chip->bus, c, &codec);
 			if (err < 0)
 				continue;
+			codec->beep_mode = chip->beep_mode;
 			codecs++;
 		}
 	}
@@ -2579,6 +2590,10 @@ static int __devinit azx_probe(struct pci_dev *pci,
 		goto out_free;
 	card->private_data = chip;
 
+#ifdef CONFIG_SND_HDA_INPUT_BEEP
+	chip->beep_mode = beep_mode[dev];
+#endif
+
 	/* create codec instances */
 	err = azx_codec_create(chip, model[dev]);
 	if (err < 0)