From: Takashi Iwai Date: Tue, 11 Sep 2012 12:24:43 +0000 (+0200) Subject: ALSA: pcm - Use UNKNOWN chmap for mono streams X-Git-Tag: firefly_0821_release~3680^2~1845^2~43^2~8 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=2dc6fbf0078e8148b571f1bbec704ca5c8e2ec2c;p=firefly-linux-kernel-4.4.55.git ALSA: pcm - Use UNKNOWN chmap for mono streams In general, mono streams have no dedicated speaker assignment, thus they should be rather marked as UNKNOWN position. Signed-off-by: Takashi Iwai --- diff --git a/sound/core/pcm_lib.c b/sound/core/pcm_lib.c index 0a750ec5c400..9647a22ed69a 100644 --- a/sound/core/pcm_lib.c +++ b/sound/core/pcm_lib.c @@ -2311,7 +2311,7 @@ EXPORT_SYMBOL(snd_pcm_lib_readv); /* default channel maps for multi-channel playbacks, up to 8 channels */ const struct snd_pcm_chmap_elem snd_pcm_std_chmaps[] = { { .channels = 1, - .map = { SNDRV_CHMAP_FC } }, + .map = { SNDRV_CHMAP_UNKNOWN } }, { .channels = 2, .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR } }, { .channels = 4, @@ -2333,7 +2333,7 @@ EXPORT_SYMBOL_GPL(snd_pcm_std_chmaps); /* alternative channel maps with CLFE <-> surround swapped for 6/8 channels */ const struct snd_pcm_chmap_elem snd_pcm_alt_chmaps[] = { { .channels = 1, - .map = { SNDRV_CHMAP_FC } }, + .map = { SNDRV_CHMAP_UNKNOWN } }, { .channels = 2, .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR } }, { .channels = 4,