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authorOlivier Moysan <olivier.moysan@st.com>2019-04-03 15:23:34 +0200
committerMark Brown <broonie@kernel.org>2019-04-04 20:55:48 +0700
commit2f7c4ce09a43457666592f36e18a5db58cca86a0 (patch)
tree9c00e572f25804feb3e7dd8d7f6d947e5cc299d7 /sound/soc/codecs/cs42l51.c
parent11b9cd748e3107df5c5e040a4daa986a3c6d8b75 (diff)
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/cs42l51.c')
-rw-r--r--sound/soc/codecs/cs42l51.c30
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);