From: Marcin Rudowski Date: Mon, 6 Feb 2006 11:15:14 +0000 (-0200) Subject: V4L/DVB (3266): Fix NICAM buzz on analog sound X-Git-Tag: v2.6.16-rc3~135^2^2~14 X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=1b0bb68d30b27b067fc654a0668d02c5bfc653a2;p=linux-2.6 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 Signed-off-by: Ricardo Cerqueira Signed-off-by: Mauro Carvalho Chehab --- diff --git a/drivers/media/video/cx88/cx88-core.c b/drivers/media/video/cx88/cx88-core.c index 8d6d6a6cf7..3720f24a25 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 */