From 25543fa785a32ce22e7374ba403eb6d38854d037 Mon Sep 17 00:00:00 2001 From: Clemens Ladisch Date: Tue, 11 Dec 2007 08:55:16 +0100 Subject: [PATCH] [ALSA] cmipci: document 'Modem' control version check Add a comment that explains why the 'Modem' control doesn't work with newer chips. Signed-off-by: Clemens Ladisch Signed-off-by: Jaroslav Kysela --- sound/pci/cmipci.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/sound/pci/cmipci.c b/sound/pci/cmipci.c index 8cb3436..bc0a195 100644 --- a/sound/pci/cmipci.c +++ b/sound/pci/cmipci.c @@ -2733,6 +2733,10 @@ static int __devinit snd_cmipci_mixer_new(struct cmipci *cm, int pcm_spdif_devic } /* card switches */ + /* + * newer chips don't have the register bits to force modem link + * detection; the bit that was FLINKON now mutes CH1 + */ if (cm->chip_version < 39) { err = snd_ctl_add(cm->card, snd_ctl_new1(&snd_cmipci_modem_switch, cm)); -- 2.7.4