At Mon, 04 Nov 2013 14:19:49 +0100, Takashi Iwai wrote:
At Mon, 4 Nov 2013 20:52:38 +0800, Raymond Yau wrote:
Refer to patch ALSA: Implement channel maps for standard onboard AC97 drivers
e36e3b86c78cee9c7435eb33e0ef8a788193e812<
https://git.kernel.org/cgit/linux/kernel/git/tiwai/sound.git/commit/sound/pc...
It seem that channal map is not working when testing with alsa-lib/test/chmap.c with the emulated intel8x0 inside virtualbox
What doesn't work actually? The lack of chmap for the capture? Please give a bit more explanations about your problem.
/alsa-lib/test$ ./chmap -Dhw:0,0 query Cannot query maps
OK. An untested fix patch is below.
Let me know if the patch worked. Then I'll apply it with Cc to stable.
thanks,
Takashi
- if (rec->ac97_idx == ICHD_PCMOUT && rec->playback_ops)
+if (device == 0 && rec->playback_ops) {
after change the above line
/alsa-lib/test$ ./chmap -Dhw:0,0 query Type = FIXED, Channels = 2 FL FR
is there any option to test the channel map of the capture device ?
The -s option specifies the stream direction. I forgot to add the help string, just take a look at the source.
Meanwhile, most of drivers don't provide the chmap for the capture direction just because they are up to two channels, and obviously it's only FL/FR. The chmap support has been added for drivers of consumer cards that are capable of multi channels.
Takashi
diff --git a/sound/pci/intel8x0.c b/sound/pci/intel8x0.c index 59c8aaebb91e..8d7a92ac616d 100644 --- a/sound/pci/intel8x0.c +++ b/sound/pci/intel8x0.c @@ -1541,17 +1541,15 @@ static int snd_intel8x0_pcm1(struct intel8x0 *chip, int device, snd_dma_pci_data(chip->pci), rec->prealloc_size, rec->prealloc_max_size);
- if (rec->ac97_idx == ICHD_PCMOUT && rec->playback_ops) {
- if (rec->playback_ops == &snd_intel8x0_playback_ops) { struct snd_pcm_chmap *chmap; int chs = 2;
if (rec->ac97_idx == ICHD_PCMOUT) {if (chip->multi8)chs = 8;else if (chip->multi6)chs = 6;else if (chip->multi4)chs = 4;}
if (chip->multi8)chs = 8;else if (chip->multi6)chs = 6;else if (chip->multi4)chs = 4;