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authorOldřich Jedlička <oldium.pro@seznam.cz>2009-08-18 16:24:54 -0300
committerMauro Carvalho Chehab <mchehab@redhat.com>2009-09-12 12:19:13 -0300
commit7b54360293c9d72b54e462d146c9376287d2f71b (patch)
tree16309986cc3b89e26ae580638b099f05b3814f11 /drivers/media
parent89dec01b7e251697720ac3d6a5310d72359eba69 (diff)
V4L/DVB (12490): Report only 32kHz for ALSA
There are several reasons: - SAA7133/35 uses DDEP (DemDec Easy Programming mode), which works in 32kHz only - SAA7134 for TV mode uses DemDec mode (32kHz) - Radio works in 32kHz only - When recording 48kHz from Line1/Line2, switching of capture source to TV means switching to 32kHz without any frequency translation Signed-off-by: Oldřich Jedlička <oldium.pro@seznam.cz> Acked-by: hermann pitton <hermann-pitton@arcor.de> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media')
-rw-r--r--drivers/media/video/saa7134/saa7134-alsa.c14
1 files changed, 12 insertions, 2 deletions
diff --git a/drivers/media/video/saa7134/saa7134-alsa.c b/drivers/media/video/saa7134/saa7134-alsa.c
index 8b0b64a8987..7c0a3a3d61a 100644
--- a/drivers/media/video/saa7134/saa7134-alsa.c
+++ b/drivers/media/video/saa7134/saa7134-alsa.c
@@ -435,6 +435,16 @@ snd_card_saa7134_capture_pointer(struct snd_pcm_substream * substream)
/*
* ALSA hardware capabilities definition
+ *
+ * Report only 32kHz for ALSA:
+ *
+ * - SAA7133/35 uses DDEP (DemDec Easy Programming mode), which works in 32kHz
+ * only
+ * - SAA7134 for TV mode uses DemDec mode (32kHz)
+ * - Radio works in 32kHz only
+ * - When recording 48kHz from Line1/Line2, switching of capture source to TV
+ * means
+ * switching to 32kHz without any frequency translation
*/
static struct snd_pcm_hardware snd_card_saa7134_capture =
@@ -448,9 +458,9 @@ static struct snd_pcm_hardware snd_card_saa7134_capture =
SNDRV_PCM_FMTBIT_U8 | \
SNDRV_PCM_FMTBIT_U16_LE | \
SNDRV_PCM_FMTBIT_U16_BE,
- .rates = SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_48000,
+ .rates = SNDRV_PCM_RATE_32000,
.rate_min = 32000,
- .rate_max = 48000,
+ .rate_max = 32000,
.channels_min = 1,
.channels_max = 2,
.buffer_bytes_max = (256*1024),