ALSA: hda - Acer Aspire 8930G support

Short story: this laptop has 5.1 built-in speakers which you *really*
want to use (the not-so-"sub" woofer is what makes the audio above
average for a laptop), so 6-channel support is important (plus a decent
asound.conf to upmix stereo). It also has the 3 typical jacks that ought
to have a selectable mode. And it's based on ALC889, which sucks.

Rationale/explanations:

The const_channel_count stuff was added because, for a laptop like this,
you always have 6 channels available (internal speakers) but still need
to set the mode for the 3 external jacks. Therefore, the device always
needs to be in 6-channel mode but there still needs to be a mixer
control for the jack mode. You could use line/mic-in at the same time as
the 6 internal speakers, for example. You might be tempted to make it
even smarter by dynamically switching the max channel count when
headphones are plugged in (therefore muting the internal speakers and
reducing the physical channel count to the jack channel mode), but as a
user I consider this to be harmful because I want the audio to blow up
to 6 channels / upmixed as soon as I unplug the headphones, and having
opened the device while in 2-channel mode would prevent this from
working (and always making 6-channel mode available doesn't do any harm).

The hardware needs EAPD turned on and the DACs routed to the internal
speaker pins, so the patch adds those verbs.

The ALC889 CLFE and subsequent (side/aux, here unused) DACs do NOT work
by default, at least here. I wasted much time trying to talk to
Realtek/pshou about this, but they just kept sending me useless updates
to patch_realtek.c that did nothing relevant. In the end I gave up and
brute forced the issue by trying to flip every bit in the proprietary
coefficient registers, and eventually found the two magic registers that
need to be cleared to enable all DACs. I have only heard Acer users
complain, but that might be because ALC889 is pretty new and using 5.1
(and noticing the missing center/lfe channels) might not be that common.
If this is a generalized issue with all ALC889 systems then those verbs
should probably be moved to a common verb array.

The internal mic is untested and probably doesn't work.

These settings will probably work for other Acer Gemstone laptops with
the same 5.1 speaker config. When identified, those should be added to
the PCI subsystem ID list.
Signed-off-by: Hector Martin <hector@marcansoft.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

Documentation/sound/alsa/HD-Audio-Models.txt

@@ -139,6 +139,7 @@ ALC883/888
   acer		Acer laptops (Travelmate 3012WTMi, Aspire 5600, etc)
   acer-aspire	Acer Aspire 9810
   acer-aspire-4930g Acer Aspire 4930G
+  acer-aspire-8930g Acer Aspire 8930G
   medion	Medion Laptops
   medion-md2	Medion MD2
   targa-dig	Targa/MSI

sound/pci/hda/patch_realtek.c

@@ -223,6 +223,7 @@ enum {
 	ALC883_ACER,
 	ALC883_ACER_ASPIRE,
 	ALC888_ACER_ASPIRE_4930G,
+	ALC888_ACER_ASPIRE_8930G,
 	ALC883_MEDION,
 	ALC883_MEDION_MD2,
 	ALC883_LAPTOP_EAPD,
@@ -313,6 +314,8 @@ struct alc_spec {
 	const struct hda_channel_mode *channel_mode;
 	int num_channel_mode;
 	int need_dac_fix;
+	int const_channel_count;
+	int ext_channel_count;
 
 	/* PCM information */
 	struct hda_pcm pcm_rec[3];	/* used in alc_build_pcms() */
@@ -368,6 +371,7 @@ struct alc_config_preset {
 	unsigned int num_channel_mode;
 	const struct hda_channel_mode *channel_mode;
 	int need_dac_fix;
+	int const_channel_count;
 	unsigned int num_mux_defs;
 	const struct hda_input_mux *input_mux;
 	void (*unsol_event)(struct hda_codec *, unsigned int);
@@ -462,7 +466,7 @@ static int alc_ch_mode_get(struct snd_kcontrol *kcontrol,
 	struct alc_spec *spec = codec->spec;
 	return snd_hda_ch_mode_get(codec, ucontrol, spec->channel_mode,
 				   spec->num_channel_mode,
-				   spec->multiout.max_channels);
+				   spec->ext_channel_count);
 }
 
 static int alc_ch_mode_put(struct snd_kcontrol *kcontrol,
@@ -472,9 +476,12 @@ static int alc_ch_mode_put(struct snd_kcontrol *kcontrol,
 	struct alc_spec *spec = codec->spec;
 	int err = snd_hda_ch_mode_put(codec, ucontrol, spec->channel_mode,
 				      spec->num_channel_mode,
-				      &spec->multiout.max_channels);
-	if (err >= 0 && spec->need_dac_fix)
-		spec->multiout.num_dacs = spec->multiout.max_channels / 2;
+				      &spec->ext_channel_count);
+	if (err >= 0 && !spec->const_channel_count) {
+		spec->multiout.max_channels = spec->ext_channel_count;
+		if (spec->need_dac_fix)
+			spec->multiout.num_dacs = spec->multiout.max_channels / 2;
+	}
 	return err;
 }
 
@@ -854,8 +861,13 @@ static void setup_preset(struct alc_spec *spec,
 	spec->channel_mode = preset->channel_mode;
 	spec->num_channel_mode = preset->num_channel_mode;
 	spec->need_dac_fix = preset->need_dac_fix;
+	spec->const_channel_count = preset->const_channel_count;
 
-	spec->multiout.max_channels = spec->channel_mode[0].channels;
+	if (preset->const_channel_count)
+		spec->multiout.max_channels = preset->const_channel_count;
+	else
+		spec->multiout.max_channels = spec->channel_mode[0].channels;
+	spec->ext_channel_count = spec->channel_mode[0].channels;
 
 	spec->multiout.num_dacs = preset->num_dacs;
 	spec->multiout.dac_nids = preset->dac_nids;
@@ -1456,6 +1468,48 @@ static struct hda_verb alc888_acer_aspire_4930g_verbs[] = {
 	{ }
 };
 
+/*
+ * ALC888 Acer Aspire 8930G model
+ */
+
+static struct hda_verb alc888_acer_aspire_8930g_verbs[] = {
+/* Front Mic: set to PIN_IN (empty by default) */
+	{0x12, AC_VERB_SET_PIN_WIDGET_CONTROL, PIN_IN},
+/* Unselect Front Mic by default in input mixer 3 */
+	{0x22, AC_VERB_SET_AMP_GAIN_MUTE, AMP_IN_MUTE(0xb)},
+/* Enable unsolicited event for HP jack */
+	{0x15, AC_VERB_SET_UNSOLICITED_ENABLE, ALC880_HP_EVENT | AC_USRSP_EN},
+/* Connect Internal Front to Front */
+	{0x14, AC_VERB_SET_PIN_WIDGET_CONTROL, PIN_OUT},
+	{0x14, AC_VERB_SET_AMP_GAIN_MUTE, AMP_OUT_UNMUTE},
+	{0x14, AC_VERB_SET_CONNECT_SEL, 0x00},
+/* Connect Internal Rear to Rear */
+	{0x1b, AC_VERB_SET_PIN_WIDGET_CONTROL, PIN_OUT},
+	{0x1b, AC_VERB_SET_AMP_GAIN_MUTE, AMP_OUT_UNMUTE},
+	{0x1b, AC_VERB_SET_CONNECT_SEL, 0x01},
+/* Connect Internal CLFE to CLFE */
+	{0x16, AC_VERB_SET_PIN_WIDGET_CONTROL, PIN_OUT},
+	{0x16, AC_VERB_SET_AMP_GAIN_MUTE, AMP_OUT_UNMUTE},
+	{0x16, AC_VERB_SET_CONNECT_SEL, 0x02},
+/* Connect HP out to Front */
+	{0x15, AC_VERB_SET_PIN_WIDGET_CONTROL, PIN_OUT},
+	{0x15, AC_VERB_SET_AMP_GAIN_MUTE, AMP_OUT_UNMUTE},
+	{0x15, AC_VERB_SET_CONNECT_SEL, 0x00},
+/* Enable all DACs */
+/*  DAC DISABLE/MUTE 1? */
+/*  setting bits 1-5 disables DAC nids 0x02-0x06 apparently. Init=0x38 */
+	{0x20, AC_VERB_SET_COEF_INDEX, 0x03},
+	{0x20, AC_VERB_SET_PROC_COEF, 0x0000},
+/*  DAC DISABLE/MUTE 2? */
+/*  some bit here disables the other DACs. Init=0x4900 */
+	{0x20, AC_VERB_SET_COEF_INDEX, 0x08},
+	{0x20, AC_VERB_SET_PROC_COEF, 0x0000},
+/* Enable amplifiers */
+	{0x14, AC_VERB_SET_EAPD_BTLENABLE, 0x02},
+	{0x15, AC_VERB_SET_EAPD_BTLENABLE, 0x02},
+	{ }
+};
+
 static struct hda_input_mux alc888_2_capture_sources[2] = {
 	/* Front mic only available on one ADC */
 	{
@@ -1508,6 +1562,17 @@ static void alc888_acer_aspire_4930g_init_hook(struct hda_codec *codec)
 	alc_automute_amp(codec);
 }
 
+static void alc888_acer_aspire_8930g_init_hook(struct hda_codec *codec)
+{
+	struct alc_spec *spec = codec->spec;
+
+	spec->autocfg.hp_pins[0] = 0x15;
+	spec->autocfg.speaker_pins[0] = 0x14;
+	spec->autocfg.speaker_pins[1] = 0x16;
+	spec->autocfg.speaker_pins[2] = 0x1b;
+	alc_automute_amp(codec);
+}
+
 /*
  * ALC880 3-stack model
  *
@@ -8758,6 +8823,7 @@ static const char *alc883_models[ALC883_MODEL_LAST] = {
 	[ALC883_ACER]		= "acer",
 	[ALC883_ACER_ASPIRE]	= "acer-aspire",
 	[ALC888_ACER_ASPIRE_4930G]	= "acer-aspire-4930g",
+	[ALC888_ACER_ASPIRE_8930G]	= "acer-aspire-8930g",
 	[ALC883_MEDION]		= "medion",
 	[ALC883_MEDION_MD2]	= "medion-md2",
 	[ALC883_LAPTOP_EAPD]	= "laptop-eapd",
@@ -8790,6 +8856,8 @@ static struct snd_pci_quirk alc883_cfg_tbl[] = {
 		ALC888_ACER_ASPIRE_4930G),
 	SND_PCI_QUIRK(0x1025, 0x013f, "Acer Aspire 5930G",
 		ALC888_ACER_ASPIRE_4930G),
+	SND_PCI_QUIRK(0x1025, 0x0145, "Acer Aspire 8930G",
+		ALC888_ACER_ASPIRE_8930G),
 	SND_PCI_QUIRK(0x1025, 0x0157, "Acer X3200", ALC883_AUTO),
 	SND_PCI_QUIRK(0x1025, 0x0158, "Acer AX1700-U3700A", ALC883_AUTO),
 	SND_PCI_QUIRK(0x1025, 0x015e, "Acer Aspire 6930G",
@@ -9009,6 +9077,27 @@ static struct alc_config_preset alc883_presets[] = {
 		.unsol_event = alc_automute_amp_unsol_event,
 		.init_hook = alc888_acer_aspire_4930g_init_hook,
 	},
+	[ALC888_ACER_ASPIRE_8930G] = {
+		.mixers = { alc888_base_mixer,
+				alc883_chmode_mixer },
+		.init_verbs = { alc883_init_verbs, alc880_gpio1_init_verbs,
+				alc888_acer_aspire_8930g_verbs },
+		.num_dacs = ARRAY_SIZE(alc883_dac_nids),
+		.dac_nids = alc883_dac_nids,
+		.num_adc_nids = ARRAY_SIZE(alc883_adc_nids_rev),
+		.adc_nids = alc883_adc_nids_rev,
+		.capsrc_nids = alc883_capsrc_nids_rev,
+		.dig_out_nid = ALC883_DIGOUT_NID,
+		.num_channel_mode = ARRAY_SIZE(alc883_3ST_6ch_modes),
+		.channel_mode = alc883_3ST_6ch_modes,
+		.need_dac_fix = 1,
+		.const_channel_count = 6,
+		.num_mux_defs =
+			ARRAY_SIZE(alc888_2_capture_sources),
+		.input_mux = alc888_2_capture_sources,
+		.unsol_event = alc_automute_amp_unsol_event,
+		.init_hook = alc888_acer_aspire_8930g_init_hook,
+	},
 	[ALC883_MEDION] = {
 		.mixers = { alc883_fivestack_mixer,
 			    alc883_chmode_mixer },