V4L/DVB (12490): Report only 32kHz for ALSA

[karo-tx-linux.git] / drivers / media / video / saa7134 / saa7134-alsa.c

diff --git a/drivers/media/video/saa7134/saa7134-alsa.c b/drivers/media/video/saa7134/saa7134-alsa.c
index 8b0b64a89874dcbaa1e591c72af22074477a8c88..7c0a3a3d61a6fad64ace851d7061f57574a05b99 100644 (file)
--- 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),