diff options
| author | Olivier Moysan <olivier.moysan@st.com> | 2019-04-03 16:23:34 +0300 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2019-04-04 16:55:48 +0300 |
| commit | 2f7c4ce09a43457666592f36e18a5db58cca86a0 (patch) | |
| tree | 9c00e572f25804feb3e7dd8d7f6d947e5cc299d7 /sound/soc/codecs | |
| parent | 11b9cd748e3107df5c5e040a4daa986a3c6d8b75 (diff) | |
| download | linux-2f7c4ce09a43457666592f36e18a5db58cca86a0.tar.xz | |
ASoC: cs42l51: add support of master mode
Add support of master mode for cs42l51 cirrus audio codec.
Signed-off-by: Olivier Moysan <olivier.moysan@st.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'sound/soc/codecs')
| -rw-r--r-- | sound/soc/codecs/cs42l51.c | 30 |
1 files changed, 27 insertions, 3 deletions
diff --git a/sound/soc/codecs/cs42l51.c b/sound/soc/codecs/cs42l51.c index 9b3ffa16b204..397b68901d1c 100644 --- a/sound/soc/codecs/cs42l51.c +++ b/sound/soc/codecs/cs42l51.c @@ -340,6 +340,19 @@ static struct cs42l51_ratios slave_auto_ratios[] = { { 256, CS42L51_DSM_MODE, 1 }, { 384, CS42L51_DSM_MODE, 1 }, }; +/* + * Master mode mclk/fs ratios. + * Recommended configurations are SSM for 4-50khz and DSM for 50-100kHz ranges + * The table below provides support of following ratios: + * 128: SSM (%128) with div2 disabled + * 256: SSM (%128) with div2 enabled + * In both cases, if sampling rate is above 50kHz, SSM is overridden + * with DSM (%128) configuration + */ +static struct cs42l51_ratios master_ratios[] = { + { 128, CS42L51_SSM_MODE, 0 }, { 256, CS42L51_SSM_MODE, 1 }, +}; + static int cs42l51_set_dai_sysclk(struct snd_soc_dai *codec_dai, int clk_id, unsigned int freq, int dir) { @@ -362,11 +375,13 @@ static int cs42l51_hw_params(struct snd_pcm_substream *substream, unsigned int ratio; struct cs42l51_ratios *ratios = NULL; int nr_ratios = 0; - int intf_ctl, power_ctl, fmt; + int intf_ctl, power_ctl, fmt, mode; switch (cs42l51->func) { case MODE_MASTER: - return -EINVAL; + ratios = master_ratios; + nr_ratios = ARRAY_SIZE(master_ratios); + break; case MODE_SLAVE: ratios = slave_ratios; nr_ratios = ARRAY_SIZE(slave_ratios); @@ -402,7 +417,16 @@ static int cs42l51_hw_params(struct snd_pcm_substream *substream, switch (cs42l51->func) { case MODE_MASTER: intf_ctl |= CS42L51_INTF_CTL_MASTER; - power_ctl |= CS42L51_MIC_POWER_CTL_SPEED(ratios[i].speed_mode); + mode = ratios[i].speed_mode; + /* Force DSM mode if sampling rate is above 50kHz */ + if (rate > 50000) + mode = CS42L51_DSM_MODE; + power_ctl |= CS42L51_MIC_POWER_CTL_SPEED(mode); + /* + * Auto detect mode is not applicable for master mode and has to + * be disabled. Otherwise SPEED[1:0] bits will be ignored. + */ + power_ctl &= ~CS42L51_MIC_POWER_CTL_AUTO; break; case MODE_SLAVE: power_ctl |= CS42L51_MIC_POWER_CTL_SPEED(ratios[i].speed_mode); |