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| author | Takashi Iwai <tiwai@suse.de> | 2009-11-16 11:25:33 +0100 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2009-11-16 11:35:23 +0100 |
| commit | 9c96fa599fe4f0ccc6e3e606df6652335afe28e8 (patch) | |
| tree | 319ab013b3bcba5fe750c51873d9977122bdcd98 /sound/pci/hda/hda_local.h | |
| parent | 4d02d1b638af580ae3d69367248539a8b3893064 (diff) | |
| download | op-kernel-dev-9c96fa599fe4f0ccc6e3e606df6652335afe28e8.zip op-kernel-dev-9c96fa599fe4f0ccc6e3e606df6652335afe28e8.tar.gz | |
ALSA: hda - Get rid of magic digits for subdev hack
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>
Diffstat (limited to 'sound/pci/hda/hda_local.h')
| -rw-r--r-- | sound/pci/hda/hda_local.h | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/sound/pci/hda/hda_local.h b/sound/pci/hda/hda_local.h index 3bfcf42..4e77f47 100644 --- a/sound/pci/hda/hda_local.h +++ b/sound/pci/hda/hda_local.h @@ -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, \ |
