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ASoC: rockchip: pdm_v2: calculate the data shift if not set by dts on rv1126b

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Change-Id: I0ae2d47d3f1091fd1673508ccc36a8e0daebb9a2
Signed-off-by: Jason Zhu <jason.zhu@rock-chips.com>
This commit is contained in:
Jason Zhu
2025-04-02 15:43:50 +08:00
committed by Tao Huang
parent d87bfc4a09
commit 79b29646f6
1 changed files with 13 additions and 2 deletions
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15
sound/soc/rockchip/rockchip_pdm_v2.c
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@@ -136,7 +136,7 @@ static void rockchip_pdm_v2_rxctrl(struct rk_pdm_v2_dev *pdm, int on)
static int rockchip_pdm_v2_set_samplerate(struct rk_pdm_v2_dev *pdm, unsigned int samplerate)
{
unsigned int upsamplerate, mclk, ratio, scale = 0;
int index, ret = 0;
int i, index, ret = 0;
index = get_pdm_v2_clkref(pdm, samplerate);
if (index < 0)
@@ -152,6 +152,17 @@ static int rockchip_pdm_v2_set_samplerate(struct rk_pdm_v2_dev *pdm, unsigned in
if (ret)
return ret;
if (pdm->version == RV1126B_PDM) {
/* calculate the data shift if not set by dts.
* Set default phase offset of 180 degrees.
*/
mclk = clk_get_rate(pdm->clk);
if (pdm->data_shift[0] == 0) {
for (i = 0; i < PDM_V2_CHANNEL_MAX; i++)
pdm->data_shift[i] = (mclk / upsamplerate / 2) + 1;
}
}
ratio = upsamplerate / samplerate / 2;
switch (ratio) {
case 8:
@@ -241,6 +252,7 @@ static int rockchip_pdm_v2_hw_params(struct snd_pcm_substream *substream,
PDM_V2_FILT1_HPF_V2_FREQ_60);
}
rockchip_pdm_v2_set_samplerate(pdm, params_rate(params));
if (pdm->version == RV1126B_PDM) {
/* PDM data shift */
n = params_channels(params);
@@ -266,7 +278,6 @@ static int rockchip_pdm_v2_hw_params(struct snd_pcm_substream *substream,
}
}
rockchip_pdm_v2_set_samplerate(pdm, params_rate(params));
val = 0;
switch (params_format(params)) {
case SNDRV_PCM_FORMAT_S16_LE: