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ALSA: dice: fix wrong channel mappping at higher sampling rate

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The channel mapping is initialized by amdtp_stream_set_parameters(), however
Dice driver set it before calling this function. Furthermore, the setting is
wrong because the index is the value of array, and vice versa.

This commit moves codes for channel mapping after the function and set it correctly.

Reported-by: Daniel Robbins <drobbins@funtoo.org>
Fixes: 10550bea44 ("ALSA: dice/firewire-lib: Keep dualwire mode but obsolete CIP_HI_DUALWIRE")
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Cc: <stable@vger.kernel.org> # 3.16
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Sakamoto 2014-08-29 13:40:44 +09:00 committed by Takashi Iwai
parent 1a22e7758e
commit 1033eb5b5a
1 changed files with 9 additions and 5 deletions
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14
sound/firewire/dice.c
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@ -579,11 +579,6 @@ static int dice_hw_params(struct snd_pcm_substream *substream,
return err;
}
for (i = 0; i < channels; i++) {
dice->stream.pcm_positions[i * 2] = i;
dice->stream.pcm_positions[i * 2 + 1] = i + channels;
}
rate /= 2;
channels *= 2;
}
@ -591,6 +586,15 @@ static int dice_hw_params(struct snd_pcm_substream *substream,
mode = rate_index_to_mode(rate_index);
amdtp_stream_set_parameters(&dice->stream, rate, channels,
dice->rx_midi_ports[mode]);
if (rate_index > 4) {
channels /= 2;
for (i = 0; i < channels; i++) {
dice->stream.pcm_positions[i] = i * 2;
dice->stream.pcm_positions[i + channels] = i * 2 + 1;
}
}
amdtp_stream_set_pcm_format(&dice->stream,
params_format(hw_params));