This patch adds support for rv1126 pdm controller which
redesign cic filiter for better performance.
Signed-off-by: Sugar Zhang <sugar.zhang@xxxxxxxxxxxxxx>
---
Changes in v2: None
sound/soc/rockchip/rockchip_pdm.c | 76 +++++++++++++++++++++++++++++++++++----
sound/soc/rockchip/rockchip_pdm.h | 3 ++
2 files changed, 73 insertions(+), 6 deletions(-)
diff --git a/sound/soc/rockchip/rockchip_pdm.c b/sound/soc/rockchip/rockchip_pdm.c
index 38bd603..67634d1 100644
--- a/sound/soc/rockchip/rockchip_pdm.c
+++ b/sound/soc/rockchip/rockchip_pdm.c
@@ -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);
diff --git a/sound/soc/rockchip/rockchip_pdm.h b/sound/soc/rockchip/rockchip_pdm.h
index 8e5bbaf..13bfbc2 100644
--- a/sound/soc/rockchip/rockchip_pdm.h
+++ b/sound/soc/rockchip/rockchip_pdm.h
@@ -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)
--
2.7.4
