diff options
| author |   Jyri Sarha <jsarha@ti.com> | 2014-06-13 12:50:00 +0300 |
|---|---|---|
| committer |   Mark Brown <broonie@linaro.org> | 2014-06-21 11:05:01 +0100 |
| commit | 0929878f93be5534974e058bc1e4b3abb36478b5 (patch) | |
| tree | bbf7764317a8565a99e66a706e5514e45713cd1a /sound/soc/davinci/davinci-mcasp.c | |
| parent | ASoC: davinci-mcasp: set up channel status bits for S/PDIF mode (diff) | |
| download | linux-dev-0929878f93be5534974e058bc1e4b3abb36478b5.tar.xz linux-dev-0929878f93be5534974e058bc1e4b3abb36478b5.zip | |
ASoC: davinci-mcasp: Allow best effort in selecting BCLK divider
Do not fail if the exact BLCK rate can not be produced, just print a
warning. Check that sysclk frequency is set before implicitly setting
the BCLK divider.
Signed-off-by: Jyri Sarha <jsarha@ti.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
Diffstat (limited to 'sound/soc/davinci/davinci-mcasp.c')
| -rw-r--r-- | sound/soc/davinci/davinci-mcasp.c | 14 |
1 files changed, 9 insertions, 5 deletions
diff --git a/sound/soc/davinci/davinci-mcasp.c b/sound/soc/davinci/davinci-mcasp.c index 121971e1371e..5b81adb3c93e 100644 --- a/sound/soc/davinci/davinci-mcasp.c +++ b/sound/soc/davinci/davinci-mcasp.c @@ -721,14 +721,18 @@ static int davinci_mcasp_hw_params(struct snd_pcm_substream *substream, int ret; /* If mcasp is BCLK master we need to set BCLK divider */ - if (mcasp->bclk_master) { + if (mcasp->bclk_master && mcasp->sysclk_freq) { unsigned int bclk_freq = snd_soc_params_to_bclk(params); + unsigned int div = mcasp->sysclk_freq / bclk_freq; if (mcasp->sysclk_freq % bclk_freq != 0) { - dev_err(mcasp->dev, "Can't produce required BCLK\n"); - return -EINVAL; + if (((mcasp->sysclk_freq / div) - bclk_freq) > + (bclk_freq - (mcasp->sysclk_freq / (div+1)))) + div++; + dev_warn(mcasp->dev, + "Inaccurate BCLK: %u Hz / %u != %u Hz\n", + mcasp->sysclk_freq, div, bclk_freq); } - davinci_mcasp_set_clkdiv( - cpu_dai, 1, mcasp->sysclk_freq / bclk_freq); + davinci_mcasp_set_clkdiv(cpu_dai, 1, div); } ret = mcasp_common_hw_param(mcasp, substream->stream, |