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Merge branch 'topic/tlv-chmap' into for-next

Browse source 
This is a merge of a topic branch containing the support for the new
channel map API using control elements.
This commit is contained in:
Takashi Iwai 2012-09-15 16:32:31 +02:00
commit e5d6db8e60
22 changed files with 1091 additions and 36 deletions
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153
Documentation/sound/alsa/Channel-Mapping-API.txt Normal file
View file

@ -0,0 +1,153 @@
ALSA PCM channel-mapping API
============================
Takashi Iwai <tiwai@suse.de>
GENERAL
-------
The channel mapping API allows user to query the possible channel maps
and the current channel map, also optionally to modify the channel map
of the current stream.
A channel map is an array of position for each PCM channel.
Typically, a stereo PCM stream has a channel map of
{ front_left, front_right }
while a 4.0 surround PCM stream has a channel map of
{ front left, front right, rear left, rear right }.
The problem, so far, was that we had no standard channel map
explicitly, and applications had no way to know which channel
corresponds to which (speaker) position. Thus, applications applied
wrong channels for 5.1 outputs, and you hear suddenly strange sound
from rear. Or, some devices secretly assume that center/LFE is the
third/fourth channels while others that C/LFE as 5th/6th channels.
Also, some devices such as HDMI are configurable for different speaker
positions even with the same number of total channels. However, there
was no way to specify this because of lack of channel map
specification. These are the main motivations for the new channel
mapping API.
DESIGN
------
Actually, "the channel mapping API" doesn't introduce anything new in
the kernel/user-space ABI perspective. It uses only the existing
control element features.
As a ground design, each PCM substream may contain a control element
providing the channel mapping information and configuration. This
element is specified by:
iface = SNDRV_CTL_ELEM_IFACE_PCM
name = "Playback Channel Map" or "Capture Channel Map"
device = the same device number for the assigned PCM substream
index = the same index number for the assigned PCM substream
Note the name is different depending on the PCM substream direction.
Each control element provides at least the TLV read operation and the
read operation. Optionally, the write operation can be provided to
allow user to change the channel map dynamically.
* TLV
The TLV operation gives the list of available channel
maps. A list item of a channel map is usually a TLV of
type data-bytes ch0 ch1 ch2...
where type is the TLV type value, the second argument is the total
bytes (not the numbers) of channel values, and the rest are the
position value for each channel.
As a TLV type, either SNDRV_CTL_TLVT_CHMAP_FIXED,
SNDRV_CTL_TLV_CHMAP_VAR or SNDRV_CTL_TLVT_CHMAP_PAIRED can be used.
The _FIXED type is for a channel map with the fixed channel position
while the latter two are for flexible channel positions. _VAR type is
for a channel map where all channels are freely swappable and _PAIRED
type is where pair-wise channels are swappable. For example, when you
have {FL/FR/RL/RR} channel map, _PAIRED type would allow you to swap
only {RL/RR/FL/FR} while _VAR type would allow even swapping FL and
RR.
These new TLV types are defined in sound/tlv.h.
The available channel position values are defined in sound/asound.h,
here is a cut:
/* channel positions */
enum {
SNDRV_CHMAP_UNKNOWN = 0,
SNDRV_CHMAP_NA, /* N/A, silent */
SNDRV_CHMAP_MONO, /* mono stream */
/* this follows the alsa-lib mixer channel value + 3 */
SNDRV_CHMAP_FL, /* front left */
SNDRV_CHMAP_FR, /* front right */
SNDRV_CHMAP_RL, /* rear left */
SNDRV_CHMAP_RR, /* rear right */
SNDRV_CHMAP_FC, /* front center */
SNDRV_CHMAP_LFE, /* LFE */
SNDRV_CHMAP_SL, /* side left */
SNDRV_CHMAP_SR, /* side right */
SNDRV_CHMAP_RC, /* rear center */
/* new definitions */
SNDRV_CHMAP_FLC, /* front left center */
SNDRV_CHMAP_FRC, /* front right center */
SNDRV_CHMAP_RLC, /* rear left center */
SNDRV_CHMAP_RRC, /* rear right center */
SNDRV_CHMAP_FLW, /* front left wide */
SNDRV_CHMAP_FRW, /* front right wide */
SNDRV_CHMAP_FLH, /* front left high */
SNDRV_CHMAP_FCH, /* front center high */
SNDRV_CHMAP_FRH, /* front right high */
SNDRV_CHMAP_TC, /* top center */
SNDRV_CHMAP_TFL, /* top front left */
SNDRV_CHMAP_TFR, /* top front right */
SNDRV_CHMAP_TFC, /* top front center */
SNDRV_CHMAP_TRL, /* top rear left */
SNDRV_CHMAP_TRR, /* top rear right */
SNDRV_CHMAP_TRC, /* top rear center */
SNDRV_CHMAP_LAST = SNDRV_CHMAP_TRC,
};
When a PCM stream can provide more than one channel map, you can
provide multiple channel maps in a TLV container type. The TLV data
to be returned will contain such as:
SNDRV_CTL_TLVT_CONTAINER 96
SNDRV_CTL_TLVT_CHMAP_FIXED 4 SNDRV_CHMAP_FC
SNDRV_CTL_TLVT_CHMAP_FIXED 8 SNDRV_CHMAP_FL SNDRV_CHMAP_FR
SNDRV_CTL_TLVT_CHMAP_FIXED 16 NDRV_CHMAP_FL SNDRV_CHMAP_FR \
SNDRV_CHMAP_RL SNDRV_CHMAP_RR
The channel position is provided in LSB 16bits. The upper bits are
used for bit flags.
#define SNDRV_CHMAP_POSITION_MASK 0xffff
#define SNDRV_CHMAP_PHASE_INVERSE (0x01 << 16)
#define SNDRV_CHMAP_DRIVER_SPEC (0x02 << 16)
SNDRV_CHMAP_PHASE_INVERSE indicates the channel is phase inverted,
(thus summing left and right channels would result in almost silence).
Some digital mic devices have this.
When SNDRV_CHMAP_DRIVER_SPEC is set, all the channel position values
don't follow the standard definition above but driver-specific.
* READ OPERATION
The control read operation is for providing the current channel map of
the given stream. The control element returns an integer array
containing the position of each channel.
When this is performed before the number of the channel is specified
(i.e. hw_params is set), it should return all channels set to
UNKNOWN.
* WRITE OPERATION
The control write operation is optional, and only for devices that can
change the channel configuration on the fly, such as HDMI. User needs
to pass an integer value containing the valid channel positions for
all channels of the assigned PCM substream.
This operation is allowed only at PCM PREPARED state. When called in
other states, it shall return an error.

3
include/sound/ac97_codec.h
View file

@ -422,6 +422,7 @@
*/ */
struct snd_ac97; struct snd_ac97;
struct snd_pcm_chmap;
struct snd_ac97_build_ops { struct snd_ac97_build_ops {
int (*build_3d) (struct snd_ac97 *ac97); int (*build_3d) (struct snd_ac97 *ac97);
@ -528,6 +529,8 @@ struct snd_ac97 {
struct delayed_work power_work; struct delayed_work power_work;
#endif #endif
struct device dev; struct device dev;
struct snd_pcm_chmap *chmaps[2]; /* channel-maps (optional) */
}; };
#define to_ac97_t(d) container_of(d, struct snd_ac97, dev) #define to_ac97_t(d) container_of(d, struct snd_ac97, dev)

39
include/sound/asound.h
View file

@ -472,6 +472,45 @@ enum {
SNDRV_PCM_TSTAMP_TYPE_LAST = SNDRV_PCM_TSTAMP_TYPE_MONOTONIC, SNDRV_PCM_TSTAMP_TYPE_LAST = SNDRV_PCM_TSTAMP_TYPE_MONOTONIC,
}; };
/* channel positions */
enum {
SNDRV_CHMAP_UNKNOWN = 0,
SNDRV_CHMAP_NA, /* N/A, silent */
SNDRV_CHMAP_MONO, /* mono stream */
/* this follows the alsa-lib mixer channel value + 3 */
SNDRV_CHMAP_FL, /* front left */
SNDRV_CHMAP_FR, /* front right */
SNDRV_CHMAP_RL, /* rear left */
SNDRV_CHMAP_RR, /* rear right */
SNDRV_CHMAP_FC, /* front center */
SNDRV_CHMAP_LFE, /* LFE */
SNDRV_CHMAP_SL, /* side left */
SNDRV_CHMAP_SR, /* side right */
SNDRV_CHMAP_RC, /* rear center */
/* new definitions */
SNDRV_CHMAP_FLC, /* front left center */
SNDRV_CHMAP_FRC, /* front right center */
SNDRV_CHMAP_RLC, /* rear left center */
SNDRV_CHMAP_RRC, /* rear right center */
SNDRV_CHMAP_FLW, /* front left wide */
SNDRV_CHMAP_FRW, /* front right wide */
SNDRV_CHMAP_FLH, /* front left high */
SNDRV_CHMAP_FCH, /* front center high */
SNDRV_CHMAP_FRH, /* front right high */
SNDRV_CHMAP_TC, /* top center */
SNDRV_CHMAP_TFL, /* top front left */
SNDRV_CHMAP_TFR, /* top front right */
SNDRV_CHMAP_TFC, /* top front center */
SNDRV_CHMAP_TRL, /* top rear left */
SNDRV_CHMAP_TRR, /* top rear right */
SNDRV_CHMAP_TRC, /* top rear center */
SNDRV_CHMAP_LAST = SNDRV_CHMAP_TRC,
};
#define SNDRV_CHMAP_POSITION_MASK 0xffff
#define SNDRV_CHMAP_PHASE_INVERSE (0x01 << 16)
#define SNDRV_CHMAP_DRIVER_SPEC (0x02 << 16)
#define SNDRV_PCM_IOCTL_PVERSION _IOR('A', 0x00, int) #define SNDRV_PCM_IOCTL_PVERSION _IOR('A', 0x00, int)
#define SNDRV_PCM_IOCTL_INFO _IOR('A', 0x01, struct snd_pcm_info) #define SNDRV_PCM_IOCTL_INFO _IOR('A', 0x01, struct snd_pcm_info)
#define SNDRV_PCM_IOCTL_TSTAMP _IOW('A', 0x02, int) #define SNDRV_PCM_IOCTL_TSTAMP _IOW('A', 0x02, int)

48
include/sound/pcm.h
View file

@ -437,6 +437,7 @@ struct snd_pcm_str {
struct snd_info_entry *proc_xrun_debug_entry; struct snd_info_entry *proc_xrun_debug_entry;
#endif #endif
#endif #endif
struct snd_kcontrol *chmap_kctl; /* channel-mapping controls */
}; };
struct snd_pcm { struct snd_pcm {
@ -1086,4 +1087,51 @@ static inline const char *snd_pcm_stream_str(struct snd_pcm_substream *substream
return "Capture"; return "Capture";
} }
/*
* PCM channel-mapping control API
*/
/* array element of channel maps */
struct snd_pcm_chmap_elem {
unsigned char channels;
unsigned char map[15];
};
/* channel map information; retrieved via snd_kcontrol_chip() */
struct snd_pcm_chmap {
struct snd_pcm *pcm; /* assigned PCM instance */
int stream; /* PLAYBACK or CAPTURE */
struct snd_kcontrol *kctl;
const struct snd_pcm_chmap_elem *chmap;
unsigned int max_channels;
unsigned int channel_mask; /* optional: active channels bitmask */
void *private_data; /* optional: private data pointer */
};
/* get the PCM substream assigned to the given chmap info */
static inline struct snd_pcm_substream *
snd_pcm_chmap_substream(struct snd_pcm_chmap *info, unsigned int idx)
{
struct snd_pcm_substream *s;
for (s = info->pcm->streams[info->stream].substream; s; s = s->next)
if (s->number == idx)
return s;
return NULL;
}
/* ALSA-standard channel maps (RL/RR prior to C/LFE) */
extern const struct snd_pcm_chmap_elem snd_pcm_std_chmaps[];
/* Other world's standard channel maps (C/LFE prior to RL/RR) */
extern const struct snd_pcm_chmap_elem snd_pcm_alt_chmaps[];
/* bit masks to be passed to snd_pcm_chmap.channel_mask field */
#define SND_PCM_CHMAP_MASK_24 ((1U << 2) | (1U << 4))
#define SND_PCM_CHMAP_MASK_246 (SND_PCM_CHMAP_MASK_24 | (1U << 6))
#define SND_PCM_CHMAP_MASK_2468 (SND_PCM_CHMAP_MASK_246 | (1U << 8))
int snd_pcm_add_chmap_ctls(struct snd_pcm *pcm, int stream,
const struct snd_pcm_chmap_elem *chmap,
int max_channels,
unsigned long private_value,
struct snd_pcm_chmap **info_ret);
#endif /* __SOUND_PCM_H */ #endif /* __SOUND_PCM_H */

8
include/sound/tlv.h
View file

@ -86,4 +86,12 @@
#define TLV_DB_GAIN_MUTE -9999999 #define TLV_DB_GAIN_MUTE -9999999
/*
* channel-mapping TLV items
* TLV length must match with num_channels
*/
#define SNDRV_CTL_TLVT_CHMAP_FIXED 0x101 /* fixed channel position */
#define SNDRV_CTL_TLVT_CHMAP_VAR 0x102 /* channels freely swappable */
#define SNDRV_CTL_TLVT_CHMAP_PAIRED 0x103 /* pair-wise swappable */
#endif /* __SOUND_TLV_H */ #endif /* __SOUND_TLV_H */

4
sound/core/pcm.c
View file

@ -1105,6 +1105,10 @@ static int snd_pcm_dev_disconnect(struct snd_device *device)
break; break;
} }
snd_unregister_device(devtype, pcm->card, pcm->device); snd_unregister_device(devtype, pcm->card, pcm->device);
if (pcm->streams[cidx].chmap_kctl) {
snd_ctl_remove(pcm->card, pcm->streams[cidx].chmap_kctl);
pcm->streams[cidx].chmap_kctl = NULL;
}
} }
unlock: unlock:
mutex_unlock(&register_mutex); mutex_unlock(&register_mutex);

214
sound/core/pcm_lib.c
View file

@ -26,6 +26,7 @@
#include <linux/export.h> #include <linux/export.h>
#include <sound/core.h> #include <sound/core.h>
#include <sound/control.h> #include <sound/control.h>
#include <sound/tlv.h>
#include <sound/info.h> #include <sound/info.h>
#include <sound/pcm.h> #include <sound/pcm.h>
#include <sound/pcm_params.h> #include <sound/pcm_params.h>
@ -2302,3 +2303,216 @@ snd_pcm_sframes_t snd_pcm_lib_readv(struct snd_pcm_substream *substream,
} }
EXPORT_SYMBOL(snd_pcm_lib_readv); EXPORT_SYMBOL(snd_pcm_lib_readv);
/*
* standard channel mapping helpers
*/
/* default channel maps for multi-channel playbacks, up to 8 channels */
const struct snd_pcm_chmap_elem snd_pcm_std_chmaps[] = {
{ .channels = 1,
.map = { SNDRV_CHMAP_MONO } },
{ .channels = 2,
.map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR } },
{ .channels = 4,
.map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR,
SNDRV_CHMAP_RL, SNDRV_CHMAP_RR } },
{ .channels = 6,
.map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR,
SNDRV_CHMAP_RL, SNDRV_CHMAP_RR,
SNDRV_CHMAP_FC, SNDRV_CHMAP_LFE } },
{ .channels = 8,
.map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR,
SNDRV_CHMAP_RL, SNDRV_CHMAP_RR,
SNDRV_CHMAP_FC, SNDRV_CHMAP_LFE,
SNDRV_CHMAP_SL, SNDRV_CHMAP_SR } },
{ }
};
EXPORT_SYMBOL_GPL(snd_pcm_std_chmaps);
/* alternative channel maps with CLFE <-> surround swapped for 6/8 channels */
const struct snd_pcm_chmap_elem snd_pcm_alt_chmaps[] = {
{ .channels = 1,
.map = { SNDRV_CHMAP_MONO } },
{ .channels = 2,
.map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR } },
{ .channels = 4,
.map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR,
SNDRV_CHMAP_RL, SNDRV_CHMAP_RR } },
{ .channels = 6,
.map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR,
SNDRV_CHMAP_FC, SNDRV_CHMAP_LFE,
SNDRV_CHMAP_RL, SNDRV_CHMAP_RR } },
{ .channels = 8,
.map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR,
SNDRV_CHMAP_FC, SNDRV_CHMAP_LFE,
SNDRV_CHMAP_RL, SNDRV_CHMAP_RR,
SNDRV_CHMAP_SL, SNDRV_CHMAP_SR } },
{ }
};
EXPORT_SYMBOL_GPL(snd_pcm_alt_chmaps);
static bool valid_chmap_channels(const struct snd_pcm_chmap *info, int ch)
{
if (ch > info->max_channels)
return false;
return !info->channel_mask || (info->channel_mask & (1U << ch));
}
static int pcm_chmap_ctl_info(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_info *uinfo)
{
struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol);
uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
uinfo->count = 0;
uinfo->count = info->max_channels;
uinfo->value.integer.min = 0;
uinfo->value.integer.max = SNDRV_CHMAP_LAST;
return 0;
}
/* get callback for channel map ctl element
* stores the channel position firstly matching with the current channels
*/
static int pcm_chmap_ctl_get(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol);
unsigned int idx = snd_ctl_get_ioffidx(kcontrol, &ucontrol->id);
struct snd_pcm_substream *substream;
const struct snd_pcm_chmap_elem *map;
if (snd_BUG_ON(!info->chmap))
return -EINVAL;
substream = snd_pcm_chmap_substream(info, idx);
if (!substream)
return -ENODEV;
memset(ucontrol->value.integer.value, 0,
sizeof(ucontrol->value.integer.value));
if (!substream->runtime)
return 0; /* no channels set */
for (map = info->chmap; map->channels; map++) {
int i;
if (map->channels == substream->runtime->channels &&
valid_chmap_channels(info, map->channels)) {
for (i = 0; i < map->channels; i++)
ucontrol->value.integer.value[i] = map->map[i];
return 0;
}
}
return -EINVAL;
}
/* tlv callback for channel map ctl element
* expands the pre-defined channel maps in a form of TLV
*/
static int pcm_chmap_ctl_tlv(struct snd_kcontrol *kcontrol, int op_flag,
unsigned int size, unsigned int __user *tlv)
{
struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol);
const struct snd_pcm_chmap_elem *map;
unsigned int __user *dst;
int c, count = 0;
if (snd_BUG_ON(!info->chmap))
return -EINVAL;
if (size < 8)
return -ENOMEM;
if (put_user(SNDRV_CTL_TLVT_CONTAINER, tlv))
return -EFAULT;
size -= 8;
dst = tlv + 2;
for (map = info->chmap; map->channels; map++) {
int chs_bytes = map->channels * 4;
if (!valid_chmap_channels(info, map->channels))
continue;
if (size < 8)
return -ENOMEM;
if (put_user(SNDRV_CTL_TLVT_CHMAP_FIXED, dst) ||
put_user(chs_bytes, dst + 1))
return -EFAULT;
dst += 2;
size -= 8;
count += 8;
if (size < chs_bytes)
return -ENOMEM;
size -= chs_bytes;
count += chs_bytes;
for (c = 0; c < map->channels; c++) {
if (put_user(map->map[c], dst))
return -EFAULT;
dst++;
}
}
if (put_user(count, tlv + 1))
return -EFAULT;
return 0;
}
static void pcm_chmap_ctl_private_free(struct snd_kcontrol *kcontrol)
{
struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol);
info->pcm->streams[info->stream].chmap_kctl = NULL;
kfree(info);
}
/**
* snd_pcm_add_chmap_ctls - create channel-mapping control elements
* @pcm: the assigned PCM instance
* @stream: stream direction
* @chmap: channel map elements (for query)
* @max_channels: the max number of channels for the stream
* @private_value: the value passed to each kcontrol's private_value field
* @info_ret: store struct snd_pcm_chmap instance if non-NULL
*
* Create channel-mapping control elements assigned to the given PCM stream(s).
* Returns zero if succeed, or a negative error value.
*/
int snd_pcm_add_chmap_ctls(struct snd_pcm *pcm, int stream,
const struct snd_pcm_chmap_elem *chmap,
int max_channels,
unsigned long private_value,
struct snd_pcm_chmap **info_ret)
{
struct snd_pcm_chmap *info;
struct snd_kcontrol_new knew = {
.iface = SNDRV_CTL_ELEM_IFACE_PCM,
.access = SNDRV_CTL_ELEM_ACCESS_READ |
SNDRV_CTL_ELEM_ACCESS_TLV_READ |
SNDRV_CTL_ELEM_ACCESS_TLV_CALLBACK,
.info = pcm_chmap_ctl_info,
.get = pcm_chmap_ctl_get,
.tlv.c = pcm_chmap_ctl_tlv,
};
int err;
info = kzalloc(sizeof(*info), GFP_KERNEL);
if (!info)
return -ENOMEM;
info->pcm = pcm;
info->stream = stream;
info->chmap = chmap;
info->max_channels = max_channels;
if (stream == SNDRV_PCM_STREAM_PLAYBACK)
knew.name = "Playback Channel Map";
else
knew.name = "Capture Channel Map";
knew.device = pcm->device;
knew.count = pcm->streams[stream].substream_count;
knew.private_value = private_value;
info->kctl = snd_ctl_new1(&knew, info);
if (!info->kctl) {
kfree(info);
return -ENOMEM;
}
info->kctl->private_free = pcm_chmap_ctl_private_free;
err = snd_ctl_add(pcm->card, info->kctl);
if (err < 0)
return err;
pcm->streams[stream].chmap_kctl = info->kctl;
if (info_ret)
*info_ret = info;
return 0;
}
EXPORT_SYMBOL_GPL(snd_pcm_add_chmap_ctls);

24
sound/pci/ac97/ac97_patch.c
View file

@ -2595,6 +2595,21 @@ static void alc650_update_jacks(struct snd_ac97 *ac97)
shared ? 0 : 0x100); shared ? 0 : 0x100);
} }
static int alc650_swap_surround_put(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_ac97 *ac97 = snd_kcontrol_chip(kcontrol);
struct snd_pcm_chmap *map = ac97->chmaps[SNDRV_PCM_STREAM_PLAYBACK];
if (map) {
if (ucontrol->value.integer.value[0])
map->chmap = snd_pcm_std_chmaps;
else
map->chmap = snd_pcm_alt_chmaps;
}
return snd_ac97_put_volsw(kcontrol, ucontrol);
}
static const struct snd_kcontrol_new snd_ac97_controls_alc650[] = { static const struct snd_kcontrol_new snd_ac97_controls_alc650[] = {
AC97_SINGLE("Duplicate Front", AC97_ALC650_MULTICH, 0, 1, 0), AC97_SINGLE("Duplicate Front", AC97_ALC650_MULTICH, 0, 1, 0),
AC97_SINGLE("Surround Down Mix", AC97_ALC650_MULTICH, 1, 1, 0), AC97_SINGLE("Surround Down Mix", AC97_ALC650_MULTICH, 1, 1, 0),
@ -2608,7 +2623,14 @@ static const struct snd_kcontrol_new snd_ac97_controls_alc650[] = {
/* 9: Line-In/Surround share */ /* 9: Line-In/Surround share */
/* 10: Mic/CLFE share */ /* 10: Mic/CLFE share */
/* 11-13: in IEC958 controls */ /* 11-13: in IEC958 controls */
AC97_SINGLE("Swap Surround Slot", AC97_ALC650_MULTICH, 14, 1, 0), {
.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
.name = "Swap Surround Slot",
.info = snd_ac97_info_volsw,
.get = snd_ac97_get_volsw,
.put = alc650_swap_surround_put,
.private_value = AC97_SINGLE_VALUE(AC97_ALC650_MULTICH, 14, 1, 0),
},
#if 0 /* always set in patch_alc650 */ #if 0 /* always set in patch_alc650 */
AC97_SINGLE("IEC958 Input Clock Enable", AC97_ALC650_CLOCK, 0, 1, 0), AC97_SINGLE("IEC958 Input Clock Enable", AC97_ALC650_CLOCK, 0, 1, 0),
AC97_SINGLE("IEC958 Input Pin Enable", AC97_ALC650_CLOCK, 1, 1, 0), AC97_SINGLE("IEC958 Input Pin Enable", AC97_ALC650_CLOCK, 1, 1, 0),

9
sound/pci/atiixp.c
View file

@ -1250,6 +1250,7 @@ static struct atiixp_dma_ops snd_atiixp_spdif_dma_ops = {
static int __devinit snd_atiixp_pcm_new(struct atiixp *chip) static int __devinit snd_atiixp_pcm_new(struct atiixp *chip)
{ {
struct snd_pcm *pcm; struct snd_pcm *pcm;
struct snd_pcm_chmap *chmap;
struct snd_ac97_bus *pbus = chip->ac97_bus; struct snd_ac97_bus *pbus = chip->ac97_bus;
int err, i, num_pcms; int err, i, num_pcms;
@ -1293,6 +1294,14 @@ static int __devinit snd_atiixp_pcm_new(struct atiixp *chip)
snd_dma_pci_data(chip->pci), snd_dma_pci_data(chip->pci),
64*1024, 128*1024); 64*1024, 128*1024);
err = snd_pcm_add_chmap_ctls(pcm, SNDRV_PCM_STREAM_PLAYBACK,
snd_pcm_alt_chmaps, chip->max_channels, 0,
&chmap);
if (err < 0)
return err;
chmap->channel_mask = SND_PCM_CHMAP_MASK_2468;
chip->ac97[0]->chmaps[SNDRV_PCM_STREAM_PLAYBACK] = chmap;
/* no SPDIF support on codec? */ /* no SPDIF support on codec? */
if (chip->pcms[ATI_PCM_SPDIF] && ! chip->pcms[ATI_PCM_SPDIF]->rates) if (chip->pcms[ATI_PCM_SPDIF] && ! chip->pcms[ATI_PCM_SPDIF]->rates)
return 0; return 0;

28
sound/pci/ca0106/ca0106_main.c
View file

@ -1334,10 +1334,29 @@ static irqreturn_t snd_ca0106_interrupt(int irq, void *dev_id)
return IRQ_HANDLED; return IRQ_HANDLED;
} }
static const struct snd_pcm_chmap_elem surround_map[] = {
{ .channels = 2,
.map = { SNDRV_CHMAP_RL, SNDRV_CHMAP_RR } },
{ }
};
static const struct snd_pcm_chmap_elem clfe_map[] = {
{ .channels = 2,
.map = { SNDRV_CHMAP_FC, SNDRV_CHMAP_LFE } },
{ }
};
static const struct snd_pcm_chmap_elem side_map[] = {
{ .channels = 2,
.map = { SNDRV_CHMAP_SL, SNDRV_CHMAP_SR } },
{ }
};
static int __devinit snd_ca0106_pcm(struct snd_ca0106 *emu, int device) static int __devinit snd_ca0106_pcm(struct snd_ca0106 *emu, int device)
{ {
struct snd_pcm *pcm; struct snd_pcm *pcm;
struct snd_pcm_substream *substream; struct snd_pcm_substream *substream;
const struct snd_pcm_chmap_elem *map = NULL;
int err; int err;
err = snd_pcm_new(emu->card, "ca0106", device, 1, 1, &pcm); err = snd_pcm_new(emu->card, "ca0106", device, 1, 1, &pcm);
@ -1350,18 +1369,22 @@ static int __devinit snd_ca0106_pcm(struct snd_ca0106 *emu, int device)
case 0: case 0:
snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_ca0106_playback_front_ops); snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_ca0106_playback_front_ops);
snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_ca0106_capture_0_ops); snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_ca0106_capture_0_ops);
map = snd_pcm_std_chmaps;
break; break;
case 1: case 1:
snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_ca0106_playback_rear_ops); snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_ca0106_playback_rear_ops);
snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_ca0106_capture_1_ops); snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_ca0106_capture_1_ops);
map = surround_map;
break; break;
case 2: case 2:
snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_ca0106_playback_center_lfe_ops); snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_ca0106_playback_center_lfe_ops);
snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_ca0106_capture_2_ops); snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_ca0106_capture_2_ops);
map = clfe_map;
break; break;
case 3: case 3:
snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_ca0106_playback_unknown_ops); snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_ca0106_playback_unknown_ops);
snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_ca0106_capture_3_ops); snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_ca0106_capture_3_ops);
map = side_map;
break; break;
} }
@ -1388,6 +1411,11 @@ static int __devinit snd_ca0106_pcm(struct snd_ca0106 *emu, int device)
return err; return err;
} }
err = snd_pcm_add_chmap_ctls(pcm, SNDRV_PCM_STREAM_PLAYBACK, map, 2,
1 << 2, NULL);
if (err < 0)
return err;
emu->pcm[device] = pcm; emu->pcm[device] = pcm;
return 0; return 0;

6
sound/pci/cmipci.c
View file

@ -1962,6 +1962,12 @@ static int __devinit snd_cmipci_pcm_spdif_new(struct cmipci *cm, int device)
snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV, snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
snd_dma_pci_data(cm->pci), 64*1024, 128*1024); snd_dma_pci_data(cm->pci), 64*1024, 128*1024);
err = snd_pcm_add_chmap_ctls(pcm, SNDRV_PCM_STREAM_PLAYBACK,
snd_pcm_alt_chmaps, cm->max_channels, 0,
NULL);
if (err < 0)
return err;
return 0; return 0;
} }

50
sound/pci/ctxfi/ctpcm.c
View file

@ -395,12 +395,38 @@ static struct snd_pcm_ops ct_pcm_capture_ops = {
.page = snd_pcm_sgbuf_ops_page, .page = snd_pcm_sgbuf_ops_page,
}; };
static const struct snd_pcm_chmap_elem surround_map[] = {
{ .channels = 1,
.map = { SNDRV_CHMAP_MONO } },
{ .channels = 2,
.map = { SNDRV_CHMAP_RL, SNDRV_CHMAP_RR } },
{ }
};
static const struct snd_pcm_chmap_elem clfe_map[] = {
{ .channels = 1,
.map = { SNDRV_CHMAP_MONO } },
{ .channels = 2,
.map = { SNDRV_CHMAP_FC, SNDRV_CHMAP_LFE } },
{ }
};
static const struct snd_pcm_chmap_elem side_map[] = {
{ .channels = 1,
.map = { SNDRV_CHMAP_MONO } },
{ .channels = 2,
.map = { SNDRV_CHMAP_SL, SNDRV_CHMAP_SR } },
{ }
};
/* Create ALSA pcm device */ /* Create ALSA pcm device */
int ct_alsa_pcm_create(struct ct_atc *atc, int ct_alsa_pcm_create(struct ct_atc *atc,
enum CTALSADEVS device, enum CTALSADEVS device,
const char *device_name) const char *device_name)
{ {
struct snd_pcm *pcm; struct snd_pcm *pcm;
const struct snd_pcm_chmap_elem *map;
int chs;
int err; int err;
int playback_count, capture_count; int playback_count, capture_count;
@ -427,6 +453,30 @@ int ct_alsa_pcm_create(struct ct_atc *atc,
snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV_SG, snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV_SG,
snd_dma_pci_data(atc->pci), 128*1024, 128*1024); snd_dma_pci_data(atc->pci), 128*1024, 128*1024);
chs = 2;
switch (device) {
case FRONT:
chs = 8;
map = snd_pcm_std_chmaps;
break;
case SURROUND:
map = surround_map;
break;
case CLFE:
map = clfe_map;
break;
case SIDE:
map = side_map;
break;
default:
map = snd_pcm_std_chmaps;
break;
}
err = snd_pcm_add_chmap_ctls(pcm, SNDRV_PCM_STREAM_PLAYBACK, map, chs,
0, NULL);
if (err < 0)
return err;
#ifdef CONFIG_PM_SLEEP #ifdef CONFIG_PM_SLEEP
atc->pcms[device] = pcm; atc->pcms[device] = pcm;
#endif #endif

21
sound/pci/emu10k1/emu10k1x.c
View file

@ -830,9 +830,22 @@ static irqreturn_t snd_emu10k1x_interrupt(int irq, void *dev_id)
return IRQ_HANDLED; return IRQ_HANDLED;
} }
static const struct snd_pcm_chmap_elem surround_map[] = {
{ .channels = 2,
.map = { SNDRV_CHMAP_RL, SNDRV_CHMAP_RR } },
{ }
};
static const struct snd_pcm_chmap_elem clfe_map[] = {
{ .channels = 2,
.map = { SNDRV_CHMAP_FC, SNDRV_CHMAP_LFE } },
{ }
};
static int __devinit snd_emu10k1x_pcm(struct emu10k1x *emu, int device, struct snd_pcm **rpcm) static int __devinit snd_emu10k1x_pcm(struct emu10k1x *emu, int device, struct snd_pcm **rpcm)
{ {
struct snd_pcm *pcm; struct snd_pcm *pcm;
const struct snd_pcm_chmap_elem *map = NULL;
int err; int err;
int capture = 0; int capture = 0;
@ -861,12 +874,15 @@ static int __devinit snd_emu10k1x_pcm(struct emu10k1x *emu, int device, struct s
switch(device) { switch(device) {
case 0: case 0:
strcpy(pcm->name, "EMU10K1X Front"); strcpy(pcm->name, "EMU10K1X Front");
map = snd_pcm_std_chmaps;
break; break;
case 1: case 1:
strcpy(pcm->name, "EMU10K1X Rear"); strcpy(pcm->name, "EMU10K1X Rear");
map = surround_map;
break; break;
case 2: case 2:
strcpy(pcm->name, "EMU10K1X Center/LFE"); strcpy(pcm->name, "EMU10K1X Center/LFE");
map = clfe_map;
break; break;
} }
emu->pcm = pcm; emu->pcm = pcm;
@ -875,6 +891,11 @@ static int __devinit snd_emu10k1x_pcm(struct emu10k1x *emu, int device, struct s
snd_dma_pci_data(emu->pci), snd_dma_pci_data(emu->pci),
32*1024, 32*1024); 32*1024, 32*1024);
err = snd_pcm_add_chmap_ctls(pcm, SNDRV_PCM_STREAM_PLAYBACK, map, 2,
1 << 2, NULL);
if (err < 0)
return err;
if (rpcm) if (rpcm)
*rpcm = pcm; *rpcm = pcm;

66
sound/pci/ens1370.c
View file

@ -55,8 +55,10 @@
#ifdef CHIP1370 #ifdef CHIP1370
#define DRIVER_NAME "ENS1370" #define DRIVER_NAME "ENS1370"
#define CHIP_NAME "ES1370" /* it can be ENS but just to keep compatibility... */
#else #else
#define DRIVER_NAME "ENS1371" #define DRIVER_NAME "ENS1371"
#define CHIP_NAME "ES1371"
#endif #endif
@ -1258,6 +1260,14 @@ static struct snd_pcm_ops snd_ensoniq_capture_ops = {
.pointer = snd_ensoniq_capture_pointer, .pointer = snd_ensoniq_capture_pointer,
}; };
static const struct snd_pcm_chmap_elem surround_map[] = {
{ .channels = 1,
.map = { SNDRV_CHMAP_MONO } },
{ .channels = 2,
.map = { SNDRV_CHMAP_RL, SNDRV_CHMAP_RR } },
{ }
};
static int __devinit snd_ensoniq_pcm(struct ensoniq * ensoniq, int device, static int __devinit snd_ensoniq_pcm(struct ensoniq * ensoniq, int device,
struct snd_pcm ** rpcm) struct snd_pcm ** rpcm)
{ {
@ -1266,11 +1276,7 @@ static int __devinit snd_ensoniq_pcm(struct ensoniq * ensoniq, int device,
if (rpcm) if (rpcm)
*rpcm = NULL; *rpcm = NULL;
#ifdef CHIP1370 err = snd_pcm_new(ensoniq->card, CHIP_NAME "/1", device, 1, 1, &pcm);
err = snd_pcm_new(ensoniq->card, "ES1370/1", device, 1, 1, &pcm);
#else
err = snd_pcm_new(ensoniq->card, "ES1371/1", device, 1, 1, &pcm);
#endif
if (err < 0) if (err < 0)
return err; return err;
@ -1283,16 +1289,22 @@ static int __devinit snd_ensoniq_pcm(struct ensoniq * ensoniq, int device,
pcm->private_data = ensoniq; pcm->private_data = ensoniq;
pcm->info_flags = 0; pcm->info_flags = 0;
#ifdef CHIP1370 strcpy(pcm->name, CHIP_NAME " DAC2/ADC");
strcpy(pcm->name, "ES1370 DAC2/ADC");
#else
strcpy(pcm->name, "ES1371 DAC2/ADC");
#endif
ensoniq->pcm1 = pcm; ensoniq->pcm1 = pcm;
snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV, snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
snd_dma_pci_data(ensoniq->pci), 64*1024, 128*1024); snd_dma_pci_data(ensoniq->pci), 64*1024, 128*1024);
#ifdef CHIP1370
err = snd_pcm_add_chmap_ctls(pcm, SNDRV_PCM_STREAM_PLAYBACK,
surround_map, 2, 0, NULL);
#else
err = snd_pcm_add_chmap_ctls(pcm, SNDRV_PCM_STREAM_PLAYBACK,
snd_pcm_std_chmaps, 2, 0, NULL);
#endif
if (err < 0)
return err;
if (rpcm) if (rpcm)
*rpcm = pcm; *rpcm = pcm;
return 0; return 0;
@ -1306,11 +1318,7 @@ static int __devinit snd_ensoniq_pcm2(struct ensoniq * ensoniq, int device,
if (rpcm) if (rpcm)
*rpcm = NULL; *rpcm = NULL;
#ifdef CHIP1370 err = snd_pcm_new(ensoniq->card, CHIP_NAME "/2", device, 1, 0, &pcm);
err = snd_pcm_new(ensoniq->card, "ES1370/2", device, 1, 0, &pcm);
#else
err = snd_pcm_new(ensoniq->card, "ES1371/2", device, 1, 0, &pcm);
#endif
if (err < 0) if (err < 0)
return err; return err;
@ -1321,16 +1329,22 @@ static int __devinit snd_ensoniq_pcm2(struct ensoniq * ensoniq, int device,
#endif #endif
pcm->private_data = ensoniq; pcm->private_data = ensoniq;
pcm->info_flags = 0; pcm->info_flags = 0;
#ifdef CHIP1370 strcpy(pcm->name, CHIP_NAME " DAC1");
strcpy(pcm->name, "ES1370 DAC1");
#else
strcpy(pcm->name, "ES1371 DAC1");
#endif
ensoniq->pcm2 = pcm; ensoniq->pcm2 = pcm;
snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV, snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
snd_dma_pci_data(ensoniq->pci), 64*1024, 128*1024); snd_dma_pci_data(ensoniq->pci), 64*1024, 128*1024);
#ifdef CHIP1370
err = snd_pcm_add_chmap_ctls(pcm, SNDRV_PCM_STREAM_PLAYBACK,
snd_pcm_std_chmaps, 2, 0, NULL);
#else
err = snd_pcm_add_chmap_ctls(pcm, SNDRV_PCM_STREAM_PLAYBACK,
surround_map, 2, 0, NULL);
#endif
if (err < 0)
return err;
if (rpcm) if (rpcm)
*rpcm = pcm; *rpcm = pcm;
return 0; return 0;
@ -1885,11 +1899,7 @@ static void snd_ensoniq_proc_read(struct snd_info_entry *entry,
{ {
struct ensoniq *ensoniq = entry->private_data; struct ensoniq *ensoniq = entry->private_data;
#ifdef CHIP1370 snd_iprintf(buffer, "Ensoniq AudioPCI " CHIP_NAME "\n\n");
snd_iprintf(buffer, "Ensoniq AudioPCI ES1370\n\n");
#else
snd_iprintf(buffer, "Ensoniq AudioPCI ES1371\n\n");
#endif
snd_iprintf(buffer, "Joystick enable : %s\n", snd_iprintf(buffer, "Joystick enable : %s\n",
ensoniq->ctrl & ES_JYSTK_EN ? "on" : "off"); ensoniq->ctrl & ES_JYSTK_EN ? "on" : "off");
#ifdef CHIP1370 #ifdef CHIP1370
@ -2361,11 +2371,7 @@ static int __devinit snd_ensoniq_midi(struct ensoniq * ensoniq, int device,
*rrawmidi = NULL; *rrawmidi = NULL;
if ((err = snd_rawmidi_new(ensoniq->card, "ES1370/1", device, 1, 1, &rmidi)) < 0) if ((err = snd_rawmidi_new(ensoniq->card, "ES1370/1", device, 1, 1, &rmidi)) < 0)
return err; return err;
#ifdef CHIP1370 strcpy(rmidi->name, CHIP_NAME);
strcpy(rmidi->name, "ES1370");
#else
strcpy(rmidi->name, "ES1371");
#endif
snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT, &snd_ensoniq_midi_output); snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT, &snd_ensoniq_midi_output);
snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT, &snd_ensoniq_midi_input); snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT, &snd_ensoniq_midi_input);
rmidi->info_flags |= SNDRV_RAWMIDI_INFO_OUTPUT | SNDRV_RAWMIDI_INFO_INPUT | rmidi->info_flags |= SNDRV_RAWMIDI_INFO_OUTPUT | SNDRV_RAWMIDI_INFO_INPUT |

7
sound/pci/fm801.c
View file

@ -711,6 +711,13 @@ static int __devinit snd_fm801_pcm(struct fm801 *chip, int device, struct snd_pc
snd_dma_pci_data(chip->pci), snd_dma_pci_data(chip->pci),
chip->multichannel ? 128*1024 : 64*1024, 128*1024); chip->multichannel ? 128*1024 : 64*1024, 128*1024);
err = snd_pcm_add_chmap_ctls(pcm, SNDRV_PCM_STREAM_PLAYBACK,
snd_pcm_alt_chmaps,
chip->multichannel ? 6 : 2, 0,
NULL);
if (err < 0)
return err;
if (rpcm) if (rpcm)
*rpcm = pcm; *rpcm = pcm;
return 0; return 0;

36
sound/pci/hda/hda_codec.c
View file

@ -3688,6 +3688,36 @@ int /*__devinit*/ snd_hda_build_controls(struct hda_bus *bus)
} }
EXPORT_SYMBOL_HDA(snd_hda_build_controls); EXPORT_SYMBOL_HDA(snd_hda_build_controls);
/*
* add standard channel maps if not specified
*/
static int add_std_chmaps(struct hda_codec *codec)
{
int i, str, err;
for (i = 0; i < codec->num_pcms; i++) {
for (str = 0; str < 2; str++) {
struct snd_pcm *pcm = codec->pcm_info[i].pcm;
struct hda_pcm_stream *hinfo =
&codec->pcm_info[i].stream[str];
struct snd_pcm_chmap *chmap;
if (codec->pcm_info[i].own_chmap)
continue;
if (!pcm || !hinfo->substreams)
continue;
err = snd_pcm_add_chmap_ctls(pcm, str,
snd_pcm_std_chmaps,
hinfo->channels_max,
0, &chmap);
if (err < 0)
return err;
chmap->channel_mask = SND_PCM_CHMAP_MASK_2468;
}
}
return 0;
}
int snd_hda_codec_build_controls(struct hda_codec *codec) int snd_hda_codec_build_controls(struct hda_codec *codec)
{ {
int err = 0; int err = 0;
@ -3699,6 +3729,12 @@ int snd_hda_codec_build_controls(struct hda_codec *codec)
err = codec->patch_ops.build_controls(codec); err = codec->patch_ops.build_controls(codec);
if (err < 0) if (err < 0)
return err; return err;
/* we create chmaps here instead of build_pcms */
err = add_std_chmaps(codec);
if (err < 0)
return err;
snd_hda_jack_report_sync(codec); /* call at the last init point */ snd_hda_jack_report_sync(codec); /* call at the last init point */
return 0; return 0;
} }

1
sound/pci/hda/hda_codec.h
View file

@ -776,6 +776,7 @@ struct hda_pcm {
unsigned int pcm_type; /* HDA_PCM_TYPE_XXX */ unsigned int pcm_type; /* HDA_PCM_TYPE_XXX */
int device; /* device number to assign */ int device; /* device number to assign */
struct snd_pcm *pcm; /* assigned PCM instance */ struct snd_pcm *pcm; /* assigned PCM instance */
bool own_chmap; /* codec driver provides own channel maps */
}; };
/* codec information */ /* codec information */

347
sound/pci/hda/patch_hdmi.c
View file

@ -35,6 +35,7 @@
#include <sound/core.h> #include <sound/core.h>
#include <sound/jack.h> #include <sound/jack.h>
#include <sound/asoundef.h> #include <sound/asoundef.h>
#include <sound/tlv.h>
#include "hda_codec.h" #include "hda_codec.h"
#include "hda_local.h" #include "hda_local.h"
#include "hda_jack.h" #include "hda_jack.h"
@ -73,6 +74,8 @@ struct hdmi_spec_per_pin {
struct delayed_work work; struct delayed_work work;
int repoll_count; int repoll_count;
bool non_pcm; bool non_pcm;
bool chmap_set; /* channel-map override by ALSA API? */
unsigned char chmap[8]; /* ALSA API channel-map */
}; };
struct hdmi_spec { struct hdmi_spec {
@ -82,6 +85,7 @@ struct hdmi_spec {
int num_pins; int num_pins;
struct hdmi_spec_per_pin pins[MAX_HDMI_PINS]; struct hdmi_spec_per_pin pins[MAX_HDMI_PINS];
struct hda_pcm pcm_rec[MAX_HDMI_PINS]; struct hda_pcm pcm_rec[MAX_HDMI_PINS];
unsigned int channels_max; /* max over all cvts */
/* /*
* Non-generic ATI/NVIDIA specific * Non-generic ATI/NVIDIA specific
@ -548,7 +552,7 @@ static void hdmi_debug_channel_mapping(struct hda_codec *codec,
} }
static void hdmi_setup_channel_mapping(struct hda_codec *codec, static void hdmi_std_setup_channel_mapping(struct hda_codec *codec,
hda_nid_t pin_nid, hda_nid_t pin_nid,
bool non_pcm, bool non_pcm,
int ca) int ca)
@ -588,6 +592,136 @@ static void hdmi_setup_channel_mapping(struct hda_codec *codec,
hdmi_debug_channel_mapping(codec, pin_nid); hdmi_debug_channel_mapping(codec, pin_nid);
} }
struct channel_map_table {
unsigned char map; /* ALSA API channel map position */
unsigned char cea_slot; /* CEA slot value */
int spk_mask; /* speaker position bit mask */
};
static struct channel_map_table map_tables[] = {
{ SNDRV_CHMAP_FL, 0x00, FL },
{ SNDRV_CHMAP_FR, 0x01, FR },
{ SNDRV_CHMAP_RL, 0x04, RL },
{ SNDRV_CHMAP_RR, 0x05, RR },
{ SNDRV_CHMAP_LFE, 0x02, LFE },
{ SNDRV_CHMAP_FC, 0x03, FC },
{ SNDRV_CHMAP_RLC, 0x06, RLC },
{ SNDRV_CHMAP_RRC, 0x07, RRC },
{} /* terminator */
};
/* from ALSA API channel position to speaker bit mask */
static int to_spk_mask(unsigned char c)
{
struct channel_map_table *t = map_tables;
for (; t->map; t++) {
if (t->map == c)
return t->spk_mask;
}
return 0;
}
/* from ALSA API channel position to CEA slot */
static int to_cea_slot(unsigned char c)
{
struct channel_map_table *t = map_tables;
for (; t->map; t++) {
if (t->map == c)
return t->cea_slot;
}
return 0x0f;
}
/* from CEA slot to ALSA API channel position */
static int from_cea_slot(unsigned char c)
{
struct channel_map_table *t = map_tables;
for (; t->map; t++) {
if (t->cea_slot == c)
return t->map;
}
return 0;
}
/* from speaker bit mask to ALSA API channel position */
static int spk_to_chmap(int spk)
{
struct channel_map_table *t = map_tables;
for (; t->map; t++) {
if (t->spk_mask == spk)
return t->map;
}
return 0;
}
/* get the CA index corresponding to the given ALSA API channel map */
static int hdmi_manual_channel_allocation(int chs, unsigned char *map)
{
int i, spks = 0, spk_mask = 0;
for (i = 0; i < chs; i++) {
int mask = to_spk_mask(map[i]);
if (mask) {
spk_mask |= mask;
spks++;
}
}
for (i = 0; i < ARRAY_SIZE(channel_allocations); i++) {
if ((chs == channel_allocations[i].channels ||
spks == channel_allocations[i].channels) &&
(spk_mask & channel_allocations[i].spk_mask) ==
channel_allocations[i].spk_mask)
return channel_allocations[i].ca_index;
}
return -1;
}
/* set up the channel slots for the given ALSA API channel map */
static int hdmi_manual_setup_channel_mapping(struct hda_codec *codec,
hda_nid_t pin_nid,
int chs, unsigned char *map)
{
int i;
for (i = 0; i < 8; i++) {
int val, err;
if (i < chs)
val = to_cea_slot(map[i]);
else
val = 0xf;
val |= (i << 4);
err = snd_hda_codec_write(codec, pin_nid, 0,
AC_VERB_SET_HDMI_CHAN_SLOT, val);
if (err)
return -EINVAL;
}
return 0;
}
/* store ALSA API channel map from the current default map */
static void hdmi_setup_fake_chmap(unsigned char *map, int ca)
{
int i;
for (i = 0; i < 8; i++) {
if (i < channel_allocations[ca].channels)
map[i] = from_cea_slot((hdmi_channel_mapping[ca][i] >> 4) & 0x0f);
else
map[i] = 0;
}
}
static void hdmi_setup_channel_mapping(struct hda_codec *codec,
hda_nid_t pin_nid, bool non_pcm, int ca,
int channels, unsigned char *map)
{
if (!non_pcm && map) {
hdmi_manual_setup_channel_mapping(codec, pin_nid,
channels, map);
} else {
hdmi_std_setup_channel_mapping(codec, pin_nid, non_pcm, ca);
hdmi_setup_fake_chmap(map, ca);
}
}
/* /*
* Audio InfoFrame routines * Audio InfoFrame routines
@ -726,7 +860,12 @@ static void hdmi_setup_audio_infoframe(struct hda_codec *codec, int pin_idx,
if (!eld->monitor_present) if (!eld->monitor_present)
return; return;
ca = hdmi_channel_allocation(eld, channels); if (!non_pcm && per_pin->chmap_set)
ca = hdmi_manual_channel_allocation(channels, per_pin->chmap);
else
ca = hdmi_channel_allocation(eld, channels);
if (ca < 0)
ca = 0;
memset(&ai, 0, sizeof(ai)); memset(&ai, 0, sizeof(ai));
if (eld->conn_type == 0) { /* HDMI */ if (eld->conn_type == 0) { /* HDMI */
@ -763,7 +902,8 @@ static void hdmi_setup_audio_infoframe(struct hda_codec *codec, int pin_idx,
"pin=%d channels=%d\n", "pin=%d channels=%d\n",
pin_nid, pin_nid,
channels); channels);
hdmi_setup_channel_mapping(codec, pin_nid, non_pcm, ca); hdmi_setup_channel_mapping(codec, pin_nid, non_pcm, ca,
channels, per_pin->chmap);
hdmi_stop_infoframe_trans(codec, pin_nid); hdmi_stop_infoframe_trans(codec, pin_nid);
hdmi_fill_audio_infoframe(codec, pin_nid, hdmi_fill_audio_infoframe(codec, pin_nid,
ai.bytes, sizeof(ai)); ai.bytes, sizeof(ai));
@ -772,7 +912,8 @@ static void hdmi_setup_audio_infoframe(struct hda_codec *codec, int pin_idx,
/* For non-pcm audio switch, setup new channel mapping /* For non-pcm audio switch, setup new channel mapping
* accordingly */ * accordingly */
if (per_pin->non_pcm != non_pcm) if (per_pin->non_pcm != non_pcm)
hdmi_setup_channel_mapping(codec, pin_nid, non_pcm, ca); hdmi_setup_channel_mapping(codec, pin_nid, non_pcm, ca,
channels, per_pin->chmap);
} }
per_pin->non_pcm = non_pcm; per_pin->non_pcm = non_pcm;
@ -1098,8 +1239,11 @@ static int hdmi_add_cvt(struct hda_codec *codec, hda_nid_t cvt_nid)
per_cvt->cvt_nid = cvt_nid; per_cvt->cvt_nid = cvt_nid;
per_cvt->channels_min = 2; per_cvt->channels_min = 2;
if (chans <= 16) if (chans <= 16) {
per_cvt->channels_max = chans; per_cvt->channels_max = chans;
if (chans > spec->channels_max)
spec->channels_max = chans;
}
err = snd_hda_query_supported_pcm(codec, cvt_nid, err = snd_hda_query_supported_pcm(codec, cvt_nid,
&per_cvt->rates, &per_cvt->rates,
@ -1250,7 +1394,10 @@ static int hdmi_pcm_close(struct hda_pcm_stream *hinfo,
AC_VERB_SET_PIN_WIDGET_CONTROL, AC_VERB_SET_PIN_WIDGET_CONTROL,
pinctl & ~PIN_OUT); pinctl & ~PIN_OUT);
snd_hda_spdif_ctls_unassign(codec, pin_idx); snd_hda_spdif_ctls_unassign(codec, pin_idx);
per_pin->chmap_set = false;
memset(per_pin->chmap, 0, sizeof(per_pin->chmap));
} }
return 0; return 0;
} }
@ -1261,6 +1408,135 @@ static const struct hda_pcm_ops generic_ops = {
.cleanup = generic_hdmi_playback_pcm_cleanup, .cleanup = generic_hdmi_playback_pcm_cleanup,
}; };
/*
* ALSA API channel-map control callbacks
*/
static int hdmi_chmap_ctl_info(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_info *uinfo)
{
struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol);
struct hda_codec *codec = info->private_data;
struct hdmi_spec *spec = codec->spec;
uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
uinfo->count = spec->channels_max;
uinfo->value.integer.min = 0;
uinfo->value.integer.max = SNDRV_CHMAP_LAST;
return 0;
}
static int hdmi_chmap_ctl_tlv(struct snd_kcontrol *kcontrol, int op_flag,
unsigned int size, unsigned int __user *tlv)
{
struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol);
struct hda_codec *codec = info->private_data;
struct hdmi_spec *spec = codec->spec;
const unsigned int valid_mask =
FL | FR | RL | RR | LFE | FC | RLC | RRC;
unsigned int __user *dst;
int chs, count = 0;
if (size < 8)
return -ENOMEM;
if (put_user(SNDRV_CTL_TLVT_CONTAINER, tlv))
return -EFAULT;
size -= 8;
dst = tlv + 2;
for (chs = 2; chs <= spec->channels_max; chs++) {
int i, c;
struct cea_channel_speaker_allocation *cap;
cap = channel_allocations;
for (i = 0; i < ARRAY_SIZE(channel_allocations); i++, cap++) {
int chs_bytes = chs * 4;
if (cap->channels != chs)
continue;
if (cap->spk_mask & ~valid_mask)
continue;
if (size < 8)
return -ENOMEM;
if (put_user(SNDRV_CTL_TLVT_CHMAP_VAR, dst) ||
put_user(chs_bytes, dst + 1))
return -EFAULT;
dst += 2;
size -= 8;
count += 8;
if (size < chs_bytes)
return -ENOMEM;
size -= chs_bytes;
count += chs_bytes;
for (c = 7; c >= 0; c--) {
int spk = cap->speakers[c];
if (!spk)
continue;
if (put_user(spk_to_chmap(spk), dst))
return -EFAULT;
dst++;
}
}
}
if (put_user(count, tlv + 1))
return -EFAULT;
return 0;
}
static int hdmi_chmap_ctl_get(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol);
struct hda_codec *codec = info->private_data;
struct hdmi_spec *spec = codec->spec;
int pin_idx = kcontrol->private_value;
struct hdmi_spec_per_pin *per_pin = &spec->pins[pin_idx];
int i;
for (i = 0; i < ARRAY_SIZE(per_pin->chmap); i++)
ucontrol->value.integer.value[i] = per_pin->chmap[i];
return 0;
}
static int hdmi_chmap_ctl_put(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol);
struct hda_codec *codec = info->private_data;
struct hdmi_spec *spec = codec->spec;
int pin_idx = kcontrol->private_value;
struct hdmi_spec_per_pin *per_pin = &spec->pins[pin_idx];
unsigned int ctl_idx;
struct snd_pcm_substream *substream;
unsigned char chmap[8];
int i, ca, prepared = 0;
ctl_idx = snd_ctl_get_ioffidx(kcontrol, &ucontrol->id);
substream = snd_pcm_chmap_substream(info, ctl_idx);
if (!substream || !substream->runtime)
return -EBADFD;
switch (substream->runtime->status->state) {
case SNDRV_PCM_STATE_OPEN:
case SNDRV_PCM_STATE_SETUP:
break;
case SNDRV_PCM_STATE_PREPARED:
prepared = 1;
break;
default:
return -EBUSY;
}
memset(chmap, 0, sizeof(chmap));
for (i = 0; i < ARRAY_SIZE(chmap); i++)
chmap[i] = ucontrol->value.integer.value[i];
if (!memcmp(chmap, per_pin->chmap, sizeof(chmap)))
return 0;
ca = hdmi_manual_channel_allocation(ARRAY_SIZE(chmap), chmap);
if (ca < 0)
return -EINVAL;
per_pin->chmap_set = true;
memcpy(per_pin->chmap, chmap, sizeof(chmap));
if (prepared)
hdmi_setup_audio_infoframe(codec, pin_idx, per_pin->non_pcm,
substream);
return 0;
}
static int generic_hdmi_build_pcms(struct hda_codec *codec) static int generic_hdmi_build_pcms(struct hda_codec *codec)
{ {
struct hdmi_spec *spec = codec->spec; struct hdmi_spec *spec = codec->spec;
@ -1273,6 +1549,7 @@ static int generic_hdmi_build_pcms(struct hda_codec *codec)
info = &spec->pcm_rec[pin_idx]; info = &spec->pcm_rec[pin_idx];
info->name = get_hdmi_pcm_name(pin_idx); info->name = get_hdmi_pcm_name(pin_idx);
info->pcm_type = HDA_PCM_TYPE_HDMI; info->pcm_type = HDA_PCM_TYPE_HDMI;
info->own_chmap = true;
pstr = &info->stream[SNDRV_PCM_STREAM_PLAYBACK]; pstr = &info->stream[SNDRV_PCM_STREAM_PLAYBACK];
pstr->substreams = 1; pstr->substreams = 1;
@ -1330,6 +1607,27 @@ static int generic_hdmi_build_controls(struct hda_codec *codec)
hdmi_present_sense(per_pin, 0); hdmi_present_sense(per_pin, 0);
} }
/* add channel maps */
for (pin_idx = 0; pin_idx < spec->num_pins; pin_idx++) {
struct snd_pcm_chmap *chmap;
struct snd_kcontrol *kctl;
int i;
err = snd_pcm_add_chmap_ctls(codec->pcm_info[pin_idx].pcm,
SNDRV_PCM_STREAM_PLAYBACK,
NULL, 0, pin_idx, &chmap);
if (err < 0)
return err;
/* override handlers */
chmap->private_data = codec;
kctl = chmap->kctl;
for (i = 0; i < kctl->count; i++)
kctl->vd[i].access |= SNDRV_CTL_ELEM_ACCESS_WRITE;
kctl->info = hdmi_chmap_ctl_info;
kctl->get = hdmi_chmap_ctl_get;
kctl->put = hdmi_chmap_ctl_put;
kctl->tlv.c = hdmi_chmap_ctl_tlv;
}
return 0; return 0;
} }
@ -1857,6 +2155,43 @@ static int patch_nvhdmi_2ch(struct hda_codec *codec)
return 0; return 0;
} }
static int nvhdmi_7x_8ch_build_pcms(struct hda_codec *codec)
{
struct hdmi_spec *spec = codec->spec;
int err = simple_playback_build_pcms(codec);
spec->pcm_rec[0].own_chmap = true;
return err;
}
static int nvhdmi_7x_8ch_build_controls(struct hda_codec *codec)
{
struct hdmi_spec *spec = codec->spec;
struct snd_pcm_chmap *chmap;
int err;
err = simple_playback_build_controls(codec);
if (err < 0)
return err;
/* add channel maps */
err = snd_pcm_add_chmap_ctls(spec->pcm_rec[0].pcm,
SNDRV_PCM_STREAM_PLAYBACK,
snd_pcm_alt_chmaps, 8, 0, &chmap);
if (err < 0)
return err;
switch (codec->preset->id) {
case 0x10de0002:
case 0x10de0003:
case 0x10de0005:
case 0x10de0006:
chmap->channel_mask = (1U << 2) | (1U << 8);
break;
case 0x10de0007:
chmap->channel_mask = (1U << 2) | (1U << 6) | (1U << 8);
}
return 0;
}
static int patch_nvhdmi_8ch_7x(struct hda_codec *codec) static int patch_nvhdmi_8ch_7x(struct hda_codec *codec)
{ {
struct hdmi_spec *spec; struct hdmi_spec *spec;
@ -1867,6 +2202,8 @@ static int patch_nvhdmi_8ch_7x(struct hda_codec *codec)
spec->multiout.max_channels = 8; spec->multiout.max_channels = 8;
spec->pcm_playback = nvhdmi_pcm_playback_8ch_7x; spec->pcm_playback = nvhdmi_pcm_playback_8ch_7x;
codec->patch_ops.init = nvhdmi_7x_init_8ch; codec->patch_ops.init = nvhdmi_7x_init_8ch;
codec->patch_ops.build_pcms = nvhdmi_7x_8ch_build_pcms;
codec->patch_ops.build_controls = nvhdmi_7x_8ch_build_controls;
/* Initialize the audio infoframe channel mask and checksum to something /* Initialize the audio infoframe channel mask and checksum to something
* valid */ * valid */

2
sound/pci/hda/patch_realtek.c
View file

@ -2287,6 +2287,8 @@ static int alc_build_pcms(struct hda_codec *codec)
p = &alc_pcm_analog_playback; p = &alc_pcm_analog_playback;
info->stream[SNDRV_PCM_STREAM_PLAYBACK] = *p; info->stream[SNDRV_PCM_STREAM_PLAYBACK] = *p;
info->stream[SNDRV_PCM_STREAM_PLAYBACK].nid = spec->multiout.dac_nids[0]; info->stream[SNDRV_PCM_STREAM_PLAYBACK].nid = spec->multiout.dac_nids[0];
info->stream[SNDRV_PCM_STREAM_PLAYBACK].channels_max =
spec->multiout.max_channels;
} }
if (spec->adc_nids) { if (spec->adc_nids) {
p = spec->stream_analog_capture; p = spec->stream_analog_capture;

20
sound/pci/intel8x0.c
View file

@ -1541,6 +1541,26 @@ static int __devinit snd_intel8x0_pcm1(struct intel8x0 *chip, int device,
snd_dma_pci_data(chip->pci), snd_dma_pci_data(chip->pci),
rec->prealloc_size, rec->prealloc_max_size); rec->prealloc_size, rec->prealloc_max_size);
if (rec->ac97_idx == ICHD_PCMOUT && rec->playback_ops) {
struct snd_pcm_chmap *chmap;
int chs = 2;
if (rec->ac97_idx == ICHD_PCMOUT) {
if (chip->multi8)
chs = 8;
else if (chip->multi6)
chs = 6;
else if (chip->multi4)
chs = 4;
}
err = snd_pcm_add_chmap_ctls(pcm, SNDRV_PCM_STREAM_PLAYBACK,
snd_pcm_alt_chmaps, chs, 0,
&chmap);
if (err < 0)
return err;
chmap->channel_mask = SND_PCM_CHMAP_MASK_2468;
chip->ac97[0]->chmaps[SNDRV_PCM_STREAM_PLAYBACK] = chmap;
}
return 0; return 0;
} }

23
sound/pci/via82xx.c
View file

@ -1440,6 +1440,7 @@ static void init_viadev(struct via82xx *chip, int idx, unsigned int reg_offset,
static int __devinit snd_via8233_pcm_new(struct via82xx *chip) static int __devinit snd_via8233_pcm_new(struct via82xx *chip)
{ {
struct snd_pcm *pcm; struct snd_pcm *pcm;
struct snd_pcm_chmap *chmap;
int i, err; int i, err;
chip->playback_devno = 0; /* x 4 */ chip->playback_devno = 0; /* x 4 */
@ -1467,6 +1468,12 @@ static int __devinit snd_via8233_pcm_new(struct via82xx *chip)
snd_dma_pci_data(chip->pci), snd_dma_pci_data(chip->pci),
64*1024, VIA_MAX_BUFSIZE); 64*1024, VIA_MAX_BUFSIZE);
err = snd_pcm_add_chmap_ctls(pcm, SNDRV_PCM_STREAM_PLAYBACK,
snd_pcm_std_chmaps, 2, 0,
&chmap);
if (err < 0)
return err;
/* PCM #1: multi-channel playback and 2nd capture */ /* PCM #1: multi-channel playback and 2nd capture */
err = snd_pcm_new(chip->card, chip->card->shortname, 1, 1, 1, &pcm); err = snd_pcm_new(chip->card, chip->card->shortname, 1, 1, 1, &pcm);
if (err < 0) if (err < 0)
@ -1484,6 +1491,14 @@ static int __devinit snd_via8233_pcm_new(struct via82xx *chip)
snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV_SG, snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV_SG,
snd_dma_pci_data(chip->pci), snd_dma_pci_data(chip->pci),
64*1024, VIA_MAX_BUFSIZE); 64*1024, VIA_MAX_BUFSIZE);
err = snd_pcm_add_chmap_ctls(pcm, SNDRV_PCM_STREAM_PLAYBACK,
snd_pcm_alt_chmaps, 6, 0,
&chmap);
if (err < 0)
return err;
chip->ac97->chmaps[SNDRV_PCM_STREAM_PLAYBACK] = chmap;
return 0; return 0;
} }
@ -1493,6 +1508,7 @@ static int __devinit snd_via8233_pcm_new(struct via82xx *chip)
static int __devinit snd_via8233a_pcm_new(struct via82xx *chip) static int __devinit snd_via8233a_pcm_new(struct via82xx *chip)
{ {
struct snd_pcm *pcm; struct snd_pcm *pcm;
struct snd_pcm_chmap *chmap;
int err; int err;
chip->multi_devno = 0; chip->multi_devno = 0;
@ -1519,6 +1535,13 @@ static int __devinit snd_via8233a_pcm_new(struct via82xx *chip)
snd_dma_pci_data(chip->pci), snd_dma_pci_data(chip->pci),
64*1024, VIA_MAX_BUFSIZE); 64*1024, VIA_MAX_BUFSIZE);
err = snd_pcm_add_chmap_ctls(pcm, SNDRV_PCM_STREAM_PLAYBACK,
snd_pcm_alt_chmaps, 6, 0,
&chmap);
if (err < 0)
return err;
chip->ac97->chmaps[SNDRV_PCM_STREAM_PLAYBACK] = chmap;
/* SPDIF supported? */ /* SPDIF supported? */
if (! ac97_can_spdif(chip->ac97)) if (! ac97_can_spdif(chip->ac97))
return 0; return 0;

18
sound/pci/ymfpci/ymfpci_main.c
View file

@ -1166,6 +1166,11 @@ int __devinit snd_ymfpci_pcm(struct snd_ymfpci *chip, int device, struct snd_pcm
snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV, snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
snd_dma_pci_data(chip->pci), 64*1024, 256*1024); snd_dma_pci_data(chip->pci), 64*1024, 256*1024);
err = snd_pcm_add_chmap_ctls(pcm, SNDRV_PCM_STREAM_PLAYBACK,
snd_pcm_std_chmaps, 2, 0, NULL);
if (err < 0)
return err;
if (rpcm) if (rpcm)
*rpcm = pcm; *rpcm = pcm;
return 0; return 0;
@ -1257,6 +1262,14 @@ static struct snd_pcm_ops snd_ymfpci_playback_4ch_ops = {
.pointer = snd_ymfpci_playback_pointer, .pointer = snd_ymfpci_playback_pointer,
}; };
static const struct snd_pcm_chmap_elem surround_map[] = {
{ .channels = 1,
.map = { SNDRV_CHMAP_MONO } },
{ .channels = 2,
.map = { SNDRV_CHMAP_RL, SNDRV_CHMAP_RR } },
{ }
};
int __devinit snd_ymfpci_pcm_4ch(struct snd_ymfpci *chip, int device, struct snd_pcm ** rpcm) int __devinit snd_ymfpci_pcm_4ch(struct snd_ymfpci *chip, int device, struct snd_pcm ** rpcm)
{ {
struct snd_pcm *pcm; struct snd_pcm *pcm;
@ -1278,6 +1291,11 @@ int __devinit snd_ymfpci_pcm_4ch(struct snd_ymfpci *chip, int device, struct snd
snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV, snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
snd_dma_pci_data(chip->pci), 64*1024, 256*1024); snd_dma_pci_data(chip->pci), 64*1024, 256*1024);
err = snd_pcm_add_chmap_ctls(pcm, SNDRV_PCM_STREAM_PLAYBACK,
surround_map, 2, 0, NULL);
if (err < 0)
return err;
if (rpcm) if (rpcm)
*rpcm = pcm; *rpcm = pcm;
return 0; return 0;