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ALSA: hda - Get rid of magic digits for subdev hack

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Define a proper const for a magic 31bit flag for subdev / NID setup
with a brief comment.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai 2009-11-16 11:25:33 +01:00
parent 4d02d1b638
commit 9c96fa599f
6 changed files with 17 additions and 8 deletions
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2
sound/pci/hda/hda_codec.c
View File

@ -1523,7 +1523,7 @@ int snd_hda_ctl_add(struct hda_codec *codec, hda_nid_t nid,
int err;
struct hda_nid_item *item;
if (kctl->id.subdevice & (1<<31)) {
if (kctl->id.subdevice & HDA_SUBDEV_NID_FLAG) {
if (nid == 0)
nid = kctl->id.subdevice & 0xffff;
kctl->id.subdevice = 0;

15
sound/pci/hda/hda_local.h
View File

@ -23,6 +23,15 @@
#ifndef __SOUND_HDA_LOCAL_H
#define __SOUND_HDA_LOCAL_H
/* We abuse kcontrol_new.subdev field to pass the NID corresponding to
* the given new control. If id.subdev has a bit flag HDA_SUBDEV_NID_FLAG,
* snd_hda_ctl_add() takes the lower-bit subdev value as a valid NID.
*
* Note that the subdevice field is cleared again before the real registration
* in snd_hda_ctl_add(), so that this value won't appear in the outside.
*/
#define HDA_SUBDEV_NID_FLAG (1U << 31)
/*
* for mixer controls
*/
@ -33,7 +42,7 @@
/* mono volume with index (index=0,1,...) (channel=1,2) */
#define HDA_CODEC_VOLUME_MONO_IDX(xname, xcidx, nid, channel, xindex, direction) \
{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xcidx, \
.subdevice = (1<<31)|(nid), \
.subdevice = HDA_SUBDEV_NID_FLAG | (nid), \
.access = SNDRV_CTL_ELEM_ACCESS_READWRITE | \
SNDRV_CTL_ELEM_ACCESS_TLV_READ | \
SNDRV_CTL_ELEM_ACCESS_TLV_CALLBACK, \
@ -54,7 +63,7 @@
/* mono mute switch with index (index=0,1,...) (channel=1,2) */
#define HDA_CODEC_MUTE_MONO_IDX(xname, xcidx, nid, channel, xindex, direction) \
{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xcidx, \
.subdevice = (1<<31)|(nid), \
.subdevice = HDA_SUBDEV_NID_FLAG | (nid), \
.info = snd_hda_mixer_amp_switch_info, \
.get = snd_hda_mixer_amp_switch_get, \
.put = snd_hda_mixer_amp_switch_put, \
@ -71,7 +80,7 @@
/* special beep mono mute switch with index (index=0,1,...) (channel=1,2) */
#define HDA_CODEC_MUTE_BEEP_MONO_IDX(xname, xcidx, nid, channel, xindex, direction) \
{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xcidx, \
.subdevice = (1<<31)|(nid), \
.subdevice = HDA_SUBDEV_NID_FLAG | (nid), \
.info = snd_hda_mixer_amp_switch_info, \
.get = snd_hda_mixer_amp_switch_get, \
.put = snd_hda_mixer_amp_switch_put_beep, \

2
sound/pci/hda/patch_analog.c
View File

@ -2572,7 +2572,7 @@ static int add_control(struct ad198x_spec *spec, int type, const char *name,
if (! knew->name)
return -ENOMEM;
if (get_amp_nid_(val))
knew->subdevice = (1<<31)|get_amp_nid_(val);
knew->subdevice = HDA_SUBDEV_NID_FLAG | get_amp_nid_(val);
knew->private_value = val;
return 0;
}

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

@ -4324,7 +4324,7 @@ static int add_control(struct alc_spec *spec, int type, const char *name,
if (!knew->name)
return -ENOMEM;
if (get_amp_nid_(val))
knew->subdevice = (1<<31)|get_amp_nid_(val);
knew->subdevice = HDA_SUBDEV_NID_FLAG | get_amp_nid_(val);
knew->private_value = val;
return 0;
}

2
sound/pci/hda/patch_sigmatel.c
View File

@ -2689,7 +2689,7 @@ stac_control_new(struct sigmatel_spec *spec,
return NULL;
}
if (nid)
knew->subdevice = (1<<31)|nid;
knew->subdevice = HDA_SUBDEV_NID_FLAG | nid;
return knew;
}

2
sound/pci/hda/patch_via.c
View File

@ -443,7 +443,7 @@ static int via_add_control(struct via_spec *spec, int type, const char *name,
if (!knew->name)
return -ENOMEM;
if (get_amp_nid_(val))
knew->subdevice = (1<<31)|get_amp_nid_(val);
knew->subdevice = HDA_SUBDEV_NID_FLAG | get_amp_nid_(val);
knew->private_value = val;
return 0;
}