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| author | Marcin Rudowski <mar_rud@poczta.onet.pl> | 2006-02-06 09:15:14 -0200 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@infradead.org> | 2006-02-06 09:15:14 -0200 |
| commit | 17801f5fa2e31b60f26aadd7ba41395dd1b1093e (patch) | |
| tree | d1df5f2f1efb863786e4cf76ffc756b42d114fa8 | |
| parent | bbab6fd81f26b210f0815d79064a3387c3a1ade3 (diff) | |
| download | blackbird-op-linux-17801f5fa2e31b60f26aadd7ba41395dd1b1093e.tar.gz blackbird-op-linux-17801f5fa2e31b60f26aadd7ba41395dd1b1093e.zip | |
V4L/DVB (3266): Fix NICAM buzz on analog sound
Apparently, having the number of lines fixed at 4 reduces (or even kills)
the buzz found in NICAM stereo with analog sound.
Signed-off-by: Marcin Rudowski <mar_rud@poczta.onet.pl>
Signed-off-by: Ricardo Cerqueira <v4l@cerqueira.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
| -rw-r--r-- | drivers/media/video/cx88/cx88-core.c | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/drivers/media/video/cx88/cx88-core.c b/drivers/media/video/cx88/cx88-core.c index 8d6d6a6cf785..3720f24a25cf 100644 --- a/drivers/media/video/cx88/cx88-core.c +++ b/drivers/media/video/cx88/cx88-core.c @@ -787,12 +787,14 @@ static int set_pll(struct cx88_core *core, int prescale, u32 ofreq) int cx88_start_audio_dma(struct cx88_core *core) { + /* constant 128 made buzz in analog Nicam-stereo for bigger fifo_size */ + int bpl = cx88_sram_channels[SRAM_CH25].fifo_size/4; /* setup fifo + format */ - cx88_sram_channel_setup(core, &cx88_sram_channels[SRAM_CH25], 128, 0); - cx88_sram_channel_setup(core, &cx88_sram_channels[SRAM_CH26], 128, 0); + cx88_sram_channel_setup(core, &cx88_sram_channels[SRAM_CH25], bpl, 0); + cx88_sram_channel_setup(core, &cx88_sram_channels[SRAM_CH26], bpl, 0); - cx_write(MO_AUDD_LNGTH, 128); /* fifo bpl size */ - cx_write(MO_AUDR_LNGTH, 128); /* fifo bpl size */ + cx_write(MO_AUDD_LNGTH, bpl); /* fifo bpl size */ + cx_write(MO_AUDR_LNGTH, bpl); /* fifo bpl size */ /* start dma */ cx_write(MO_AUD_DMACNTRL, 0x0003); /* Up and Down fifo enable */ |
