[alsa-devel] [PATCH] cmipci at 96kHz
tiwai at suse.de
Wed Oct 31 09:25:55 CET 2007
At Tue, 30 Oct 2007 17:22:50 +0300,
Timofei V. Bondarenko wrote:
> Clemens Ladisch wrote:
> > Timofei V. Bondarenko wrote:
> >> This patch adds support for 88.2k, 96k, and 128k samplerates
> >> on cmi8738-55 chip.
> >> Analog playback works fine on all channels.
> >> Analog capture works well too, though the extra samples seems
> >> interpolated by hardware.
> >> spdif playback and capture works fine.
> >> + freq_ext = CM_CH0_SRATE_88K | CM_CH0_SRATE_96K;
> > I'd guess there should be a new symbol CM_CH0_SRATE_128K.
> Ok. One more one-time-use symbol.
> >> + case 88200:
> >> + freq = 44100;
> >> + case 96000:
> >> + freq = 48000;
> >> + case 128000:
> >> + freq = 32000; /* not matter,
> > Wouldn't it be simpler to divide freq by two in all three cases?
> Not so easy, 128/2 = 64 - is an invalid rate,
> snd_cmipci_rate_freq() will complain.
> On another hand an invalid 64k/2=32k (valid) - this make snd_BUG() in
> snd_cmipci_rate_freq() useless.
> If the '68 chip also don't care about CM_REG_FUNCTRL1:ASFC/DSFC then
> freq can be set to 0 for all doubled frequencies.
The changes in your patch look good to me, but I'd like to ask you to
fix the coding style. (At least, we should follow the standard coding
style for new codes.)
Run checkpatch.pl script included in linux-kernel/scripts directory,
and you'll see what I meant :)
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