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ALSA: isight: add AudioEnable register write

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which is needed to get the iSight to talk.

Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Stefan Richter 2011-05-11 10:49:58 +02:00 committed by Takashi Iwai
parent f2934cd499
commit 8839eedafd
1 changed files with 14 additions and 3 deletions
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17
sound/firewire/isight.c
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@ -345,7 +345,7 @@ static int isight_hw_free(struct snd_pcm_substream *substream)
static int isight_start_streaming(struct isight *isight)
{
__be32 sample_rate;
__be32 value;
unsigned int i;
int err;
@ -356,10 +356,10 @@ static int isight_start_streaming(struct isight *isight)
return 0;
}
sample_rate = cpu_to_be32(RATE_48000);
value = cpu_to_be32(RATE_48000);
err = snd_fw_transaction(isight->unit, TCODE_WRITE_QUADLET_REQUEST,
isight->audio_base + REG_SAMPLE_RATE,
&sample_rate, 4);
&value, 4);
if (err < 0)
return err;
@ -367,6 +367,13 @@ static int isight_start_streaming(struct isight *isight)
if (err < 0)
goto error;
value = cpu_to_be32(AUDIO_ENABLE);
err = snd_fw_transaction(isight->unit, TCODE_WRITE_QUADLET_REQUEST,
isight->audio_base + REG_AUDIO_ENABLE,
&value, 4);
if (err < 0)
goto err_resources;
isight->context = fw_iso_context_create(isight->device->card,
FW_ISO_CONTEXT_RECEIVE,
isight->resources.channel,
@ -400,6 +407,10 @@ err_context:
fw_iso_context_destroy(isight->context);
isight->context = NULL;
err_resources:
value = 0;
snd_fw_transaction(isight->unit, TCODE_WRITE_QUADLET_REQUEST,
isight->audio_base + REG_AUDIO_ENABLE,
&value, 4);
fw_iso_resources_free(&isight->resources);
error:
return err;