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>
diff --git a/sound/pci/echoaudio/echoaudio.c b/sound/pci/echoaudio/echoaudio.c
index 8dbc5c4..4b70ea1 100644
--- a/sound/pci/echoaudio/echoaudio.c
+++ b/sound/pci/echoaudio/echoaudio.c
@@ -950,6 +950,8 @@
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 @@
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 @@
.put = snd_echo_output_gain_put,
.tlv = {.p = db_scale_output_gain},
};
+
#endif
@@ -2037,8 +2028,6 @@
#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