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ALSA: echoaudio: remove line-out volume from vmixer cards 

There is a long standing bug in the drivers for cards with a vmixer because
I overlooked a detail in the c++ generic driver by echoaudio. Those cards
do not have a line-out volume control. It is a virtual control provided by
the generic driver. The bug is harmless because the DSP just ignores the
command to change the volume.
*NB:* It breaks alsa-tools/echomixer. A patch for it will follow.

This patch removes the line-out volume control from vmixer-equipped cards.

Signed-off-by: Giuliano Pochini <pochini@shiny.it>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Giuliano Pochini 2009-03-15 21:33:34 +01:00 committed by Takashi Iwai
parent 041b62374c
commit 9f5d790d1b
1 changed files with 3 additions and 14 deletions
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17
sound/pci/echoaudio/echoaudio.c
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@ -950,6 +950,8 @@ static int __devinit snd_echo_new_pcm(struct echoaudio *chip)
Control interface
******************************************************************************/
#ifndef ECHOCARD_HAS_VMIXER
/******************* PCM output volume *******************/
static int snd_echo_output_gain_info(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_info *uinfo)
@ -1001,18 +1003,6 @@ static int snd_echo_output_gain_put(struct snd_kcontrol *kcontrol,
return changed;
}
#ifdef ECHOCARD_HAS_VMIXER
/* On Vmixer cards this one controls the line-out volume */
static struct snd_kcontrol_new snd_echo_line_output_gain __devinitdata = {
.name = "Line Playback Volume",
.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
.access = SNDRV_CTL_ELEM_ACCESS_READWRITE | SNDRV_CTL_ELEM_ACCESS_TLV_READ,
.info = snd_echo_output_gain_info,
.get = snd_echo_output_gain_get,
.put = snd_echo_output_gain_put,
.tlv = {.p = db_scale_output_gain},
};
#else
static struct snd_kcontrol_new snd_echo_pcm_output_gain __devinitdata = {
.name = "PCM Playback Volume",
.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
@ -1022,6 +1012,7 @@ static struct snd_kcontrol_new snd_echo_pcm_output_gain __devinitdata = {
.put = snd_echo_output_gain_put,
.tlv = {.p = db_scale_output_gain},
};
#endif
@ -2037,8 +2028,6 @@ static int __devinit snd_echo_probe(struct pci_dev *pci,
#ifdef ECHOCARD_HAS_VMIXER
snd_echo_vmixer.count = num_pipes_out(chip) * num_busses_out(chip);
if ((err = snd_ctl_add(chip->card, snd_ctl_new1(&snd_echo_line_output_gain, chip))) < 0)
goto ctl_error;
if ((err = snd_ctl_add(chip->card, snd_ctl_new1(&snd_echo_vmixer, chip))) < 0)
goto ctl_error;
#else