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ASoC: rockchip: Add support for rv1126 pdm 

This patch adds support for rv1126 pdm controller which
redesign cic filiter for better performance.

Signed-off-by: Sugar Zhang <sugar.zhang@rock-chips.com>
Link: https://lore.kernel.org/r/1630675410-3354-1-git-send-email-sugar.zhang@rock-chips.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Sugar Zhang 2021-09-03 21:23:24 +08:00 committed by Mark Brown
parent 0c7985e1b9
commit d269aa2ab9
No known key found for this signature in database
GPG Key ID: 24D68B725D5487D0
2 changed files with 73 additions and 6 deletions
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76
sound/soc/rockchip/rockchip_pdm.c
View File

@ -24,6 +24,7 @@
enum rk_pdm_version {
RK_PDM_RK3229,
RK_PDM_RK3308,
RK_PDM_RV1126,
};
struct rk_pdm_dev {
@ -121,6 +122,55 @@ static unsigned int get_pdm_ds_ratio(unsigned int sr)
return ratio;
}
static unsigned int get_pdm_cic_ratio(unsigned int clk)
{
switch (clk) {
case 4096000:
case 5644800:
case 6144000:
return 0;
case 2048000:
case 2822400:
case 3072000:
return 1;
case 1024000:
case 1411200:
case 1536000:
return 2;
default:
return 1;
}
}
static unsigned int samplerate_to_bit(unsigned int samplerate)
{
switch (samplerate) {
case 8000:
case 11025:
case 12000:
return 0;
case 16000:
case 22050:
case 24000:
return 1;
case 32000:
return 2;
case 44100:
case 48000:
return 3;
case 64000:
case 88200:
case 96000:
return 4;
case 128000:
case 176400:
case 192000:
return 5;
default:
return 1;
}
}
static inline struct rk_pdm_dev *to_info(struct snd_soc_dai *dai)
{
return snd_soc_dai_get_drvdata(dai);
@ -166,7 +216,8 @@ static int rockchip_pdm_hw_params(struct snd_pcm_substream *substream,
if (ret)
return -EINVAL;
if (pdm->version == RK_PDM_RK3308) {
if (pdm->version == RK_PDM_RK3308 ||
pdm->version == RK_PDM_RV1126) {
rational_best_approximation(clk_out, clk_src,
GENMASK(16 - 1, 0),
GENMASK(16 - 1, 0),
@ -194,8 +245,18 @@ static int rockchip_pdm_hw_params(struct snd_pcm_substream *substream,
PDM_CLK_FD_RATIO_MSK,
val);
}
val = get_pdm_ds_ratio(samplerate);
regmap_update_bits(pdm->regmap, PDM_CLK_CTRL, PDM_DS_RATIO_MSK, val);
if (pdm->version == RK_PDM_RV1126) {
val = get_pdm_cic_ratio(clk_out);
regmap_update_bits(pdm->regmap, PDM_CLK_CTRL, PDM_CIC_RATIO_MSK, val);
val = samplerate_to_bit(samplerate);
regmap_update_bits(pdm->regmap, PDM_CTRL0,
PDM_SAMPLERATE_MSK, PDM_SAMPLERATE(val));
} else {
val = get_pdm_ds_ratio(samplerate);
regmap_update_bits(pdm->regmap, PDM_CLK_CTRL, PDM_DS_RATIO_MSK, val);
}
regmap_update_bits(pdm->regmap, PDM_HPF_CTRL,
PDM_HPF_CF_MSK, PDM_HPF_60HZ);
regmap_update_bits(pdm->regmap, PDM_HPF_CTRL,
@ -441,9 +502,10 @@ static bool rockchip_pdm_precious_reg(struct device *dev, unsigned int reg)
}
static const struct reg_default rockchip_pdm_reg_defaults[] = {
{0x04, 0x78000017},
{0x08, 0x0bb8ea60},
{0x18, 0x0000001f},
{ PDM_CTRL0, 0x78000017 },
{ PDM_CTRL1, 0x0bb8ea60 },
{ PDM_CLK_CTRL, 0x0000e401 },
{ PDM_DMA_CTRL, 0x0000001f },
};
static const struct regmap_config rockchip_pdm_regmap_config = {
@ -469,6 +531,8 @@ static const struct of_device_id rockchip_pdm_match[] __maybe_unused = {
.data = (void *)RK_PDM_RK3308 },
{ .compatible = "rockchip,rk3308-pdm",
.data = (void *)RK_PDM_RK3308 },
{ .compatible = "rockchip,rv1126-pdm",
.data = (void *)RK_PDM_RV1126 },
{},
};
MODULE_DEVICE_TABLE(of, rockchip_pdm_match);

3
sound/soc/rockchip/rockchip_pdm.h
View File

@ -41,6 +41,8 @@
#define PDM_PATH1_EN BIT(28)
#define PDM_PATH0_EN BIT(27)
#define PDM_HWT_EN BIT(26)
#define PDM_SAMPLERATE_MSK GENMASK(7, 5)
#define PDM_SAMPLERATE(x) ((x) << 5)
#define PDM_VDW_MSK (0x1f << 0)
#define PDM_VDW(X) ((X - 1) << 0)
@ -66,6 +68,7 @@
#define PDM_CLK_1280FS (0x2 << 0)
#define PDM_CLK_2560FS (0x3 << 0)
#define PDM_CLK_5120FS (0x4 << 0)
#define PDM_CIC_RATIO_MSK (0x3 << 0)
/* PDM HPF CTRL */
#define PDM_HPF_LE BIT(3)