[ALSA] intel8x0 - Add support of 8 channel sound

Added the support of 8 channel sound for codecs that are known to work.
So far, only ALC850 is marked as a 8ch-support codec.

This fix is a modified version of the patch on ALSA BTS#2097 by
Martin Ellis:
	https://bugtrack.alsa-project.org/alsa-bug/view.php?id=2097

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

diff --git a/include/sound/ac97_codec.h b/include/sound/ac97_codec.h
index 0148058..049edc5 100644 (file)
--- a/include/sound/ac97_codec.h
+++ b/include/sound/ac97_codec.h
@@ -397,6 +397,7 @@
 #define AC97_HAS_NO_TONE       (1<<16) /* no Tone volume */
 #define AC97_HAS_NO_STD_PCM    (1<<17) /* no standard AC97 PCM volume and mute */
 #define AC97_HAS_NO_AUX                (1<<18) /* no standard AC97 AUX volume and mute */
+#define AC97_HAS_8CH           (1<<19) /* supports 8-channel output */
 
 /* rates indexes */
 #define AC97_RATES_FRONT_DAC   0

diff --git a/sound/pci/ac97/ac97_patch.c b/sound/pci/ac97/ac97_patch.c
index 50c637e..39198e5 100644 (file)
--- a/sound/pci/ac97/ac97_patch.c
+++ b/sound/pci/ac97/ac97_patch.c
@@ -114,10 +114,9 @@ static int ac97_surround_jack_mode_put(struct snd_kcontrol *kcontrol, struct snd
 
 static int ac97_channel_mode_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
 {
-       static const char *texts[] = { "2ch", "4ch", "6ch" };
-       if (kcontrol->private_value)
-               return ac97_enum_text_info(kcontrol, uinfo, texts, 2); /* 4ch only */
-       return ac97_enum_text_info(kcontrol, uinfo, texts, 3);
+       static const char *texts[] = { "2ch", "4ch", "6ch", "8ch" };
+       return ac97_enum_text_info(kcontrol, uinfo, texts,
+               kcontrol->private_value);
 }
 
 static int ac97_channel_mode_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
@@ -133,13 +132,8 @@ static int ac97_channel_mode_put(struct snd_kcontrol *kcontrol, struct snd_ctl_e
        struct snd_ac97 *ac97 = snd_kcontrol_chip(kcontrol);
        unsigned char mode = ucontrol->value.enumerated.item[0];
 
-       if (kcontrol->private_value) {
-               if (mode >= 2)
-                       return -EINVAL;
-       } else {
-               if (mode >= 3)
-                       return -EINVAL;
-       }
+       if (mode >= kcontrol->private_value)
+               return -EINVAL;
 
        if (mode != ac97->channel_mode) {
                ac97->channel_mode = mode;
@@ -158,6 +152,7 @@ static int ac97_channel_mode_put(struct snd_kcontrol *kcontrol, struct snd_ctl_e
                .get = ac97_surround_jack_mode_get, \
                .put = ac97_surround_jack_mode_put, \
        }
+/* 6ch */
 #define AC97_CHANNEL_MODE_CTL \
        { \
                .iface  = SNDRV_CTL_ELEM_IFACE_MIXER, \
@@ -165,7 +160,9 @@ static int ac97_channel_mode_put(struct snd_kcontrol *kcontrol, struct snd_ctl_e
                .info = ac97_channel_mode_info, \
                .get = ac97_channel_mode_get, \
                .put = ac97_channel_mode_put, \
+               .private_value = 3, \
        }
+/* 4ch */
 #define AC97_CHANNEL_MODE_4CH_CTL \
        { \
                .iface  = SNDRV_CTL_ELEM_IFACE_MIXER, \
@@ -173,7 +170,17 @@ static int ac97_channel_mode_put(struct snd_kcontrol *kcontrol, struct snd_ctl_e
                .info = ac97_channel_mode_info, \
                .get = ac97_channel_mode_get, \
                .put = ac97_channel_mode_put, \
-               .private_value = 1, \
+               .private_value = 2, \
+       }
+/* 8ch */
+#define AC97_CHANNEL_MODE_8CH_CTL \
+       { \
+               .iface  = SNDRV_CTL_ELEM_IFACE_MIXER, \
+               .name   = "Channel Mode", \
+               .info = ac97_channel_mode_info, \
+               .get = ac97_channel_mode_get, \
+               .put = ac97_channel_mode_put, \
+               .private_value = 4, \
        }
 
 static inline int is_surround_on(struct snd_ac97 *ac97)
@@ -210,6 +217,10 @@ static inline int is_shared_micin(struct snd_ac97 *ac97)
        return !ac97->indep_surround && !is_clfe_on(ac97);
 }
 
+static inline int alc850_is_aux_back_surround(struct snd_ac97 *ac97)
+{
+       return is_surround_on(ac97);
+}
 
 /* The following snd_ac97_ymf753_... items added by David Shust (dshust@shustring.com) */
 /* Modified for YMF743 by Keita Maehara <maehara@debian.org> */
@@ -2816,10 +2827,12 @@ static int patch_alc655(struct snd_ac97 * ac97)
 
 #define AC97_ALC850_JACK_SELECT        0x76
 #define AC97_ALC850_MISC1      0x7a
+#define AC97_ALC850_MULTICH    0x6a
 
 static void alc850_update_jacks(struct snd_ac97 *ac97)
 {
        int shared;
+       int aux_is_back_surround;
        
        /* shared Line-In / Surround Out */
        shared = is_shared_surrout(ac97);
@@ -2837,13 +2850,18 @@ static void alc850_update_jacks(struct snd_ac97 *ac97)
        /* MIC-IN = 1, CENTER-LFE = 5 */
        snd_ac97_update_bits(ac97, AC97_ALC850_JACK_SELECT, 7 << 4,
                             shared ? (5<<4) : (1<<4));
+
+       aux_is_back_surround = alc850_is_aux_back_surround(ac97);
+       /* Aux is Back Surround */
+       snd_ac97_update_bits(ac97, AC97_ALC850_MULTICH, 1 << 10,
+                                aux_is_back_surround ? (1<<10) : (0<<10));
 }
 
 static const struct snd_kcontrol_new snd_ac97_controls_alc850[] = {
        AC97_PAGE_SINGLE("Duplicate Front", AC97_ALC650_MULTICH, 0, 1, 0, 0),
        AC97_SINGLE("Mic Front Input Switch", AC97_ALC850_JACK_SELECT, 15, 1, 1),
        AC97_SURROUND_JACK_MODE_CTL,
-       AC97_CHANNEL_MODE_CTL,
+       AC97_CHANNEL_MODE_8CH_CTL,
 };
 
 static int patch_alc850_specific(struct snd_ac97 *ac97)
@@ -2869,6 +2887,7 @@ static int patch_alc850(struct snd_ac97 *ac97)
        ac97->build_ops = &patch_alc850_ops;
 
        ac97->spec.dev_flags = 0; /* for IEC958 playback route - ALC655 compatible */
+       ac97->flags |= AC97_HAS_8CH;
 
        /* assume only page 0 for writing cache */
        snd_ac97_update_bits(ac97, AC97_INT_PAGING, AC97_PAGE_MASK, AC97_PAGE_VENDOR);
@@ -2878,6 +2897,7 @@ static int patch_alc850(struct snd_ac97 *ac97)
           spdif-in monitor off, spdif-in PCM off
           center on mic off, surround on line-in off
           duplicate front off
+          NB default bit 10=0 = Aux is Capture, not Back Surround
        */
        snd_ac97_write_cache(ac97, AC97_ALC650_MULTICH, 1<<15);
        /* SURR_OUT: on, Surr 1kOhm: on, Surr Amp: off, Front 1kOhm: off

diff --git a/sound/pci/intel8x0.c b/sound/pci/intel8x0.c
index c52abd0..07782ba 100644 (file)
--- a/sound/pci/intel8x0.c
+++ b/sound/pci/intel8x0.c
@@ -155,7 +155,8 @@ DEFINE_REGSET(SP, 0x60);    /* SPDIF out */
 #define   ICH_PCM_SPDIF_69     0x80000000      /* s/pdif pcm on slots 6&9 */
 #define   ICH_PCM_SPDIF_1011   0xc0000000      /* s/pdif pcm on slots 10&11 */
 #define   ICH_PCM_20BIT                0x00400000      /* 20-bit samples (ICH4) */
-#define   ICH_PCM_246_MASK     0x00300000      /* 6 channels (not all chips) */
+#define   ICH_PCM_246_MASK     0x00300000      /* chan mask (not all chips) */
+#define   ICH_PCM_8            0x00300000      /* 8 channels (not all chips) */
 #define   ICH_PCM_6            0x00200000      /* 6 channels (not all chips) */
 #define   ICH_PCM_4            0x00100000      /* 4 channels (not all chips) */
 #define   ICH_PCM_2            0x00000000      /* 2 channels (stereo) */
@@ -382,6 +383,7 @@ struct intel8x0 {
 
        unsigned multi4: 1,
                 multi6: 1,
+                multi8 :1,
                 dra: 1,
                 smp20bit: 1;
        unsigned in_ac97_init: 1,
@@ -997,6 +999,8 @@ static void snd_intel8x0_setup_pcm_out(struct intel8x0 *chip,
                        cnt |= ICH_PCM_4;
                else if (runtime->channels == 6)
                        cnt |= ICH_PCM_6;
+               else if (runtime->channels == 8)
+                       cnt |= ICH_PCM_8;
                if (chip->device_type == DEVICE_NFORCE) {
                        /* reset to 2ch once to keep the 6 channel data in alignment,
                         * to start from Front Left always
@@ -1106,6 +1110,16 @@ static struct snd_pcm_hw_constraint_list hw_constraints_channels6 = {
        .mask = 0,
 };
 
+static unsigned int channels8[] = {
+       2, 4, 6, 8,
+};
+
+static struct snd_pcm_hw_constraint_list hw_constraints_channels8 = {
+       .count = ARRAY_SIZE(channels8),
+       .list = channels8,
+       .mask = 0,
+};
+
 static int snd_intel8x0_pcm_open(struct snd_pcm_substream *substream, struct ichdev *ichdev)
 {
        struct intel8x0 *chip = snd_pcm_substream_chip(substream);
@@ -1136,7 +1150,12 @@ static int snd_intel8x0_playback_open(struct snd_pcm_substream *substream)
        if (err < 0)
                return err;
 
-       if (chip->multi6) {
+       if (chip->multi8) {
+               runtime->hw.channels_max = 8;
+               snd_pcm_hw_constraint_list(runtime, 0,
+                                               SNDRV_PCM_HW_PARAM_CHANNELS,
+                                               &hw_constraints_channels8);
+       } else if (chip->multi6) {
                runtime->hw.channels_max = 6;
                snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
                                           &hw_constraints_channels6);
@@ -2203,8 +2222,11 @@ static int __devinit snd_intel8x0_mixer(struct intel8x0 *chip, int ac97_clock,
        }
        if (pbus->pcms[0].r[0].slots & (1 << AC97_SLOT_PCM_SLEFT)) {
                chip->multi4 = 1;
-               if (pbus->pcms[0].r[0].slots & (1 << AC97_SLOT_LFE))
+               if (pbus->pcms[0].r[0].slots & (1 << AC97_SLOT_LFE)) {
                        chip->multi6 = 1;
+                       if (chip->ac97[0]->flags & AC97_HAS_8CH)
+                               chip->multi8 = 1;
+               }
        }
        if (pbus->pcms[0].r[1].rslots[0]) {
                chip->dra = 1;