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authorMark Brown <broonie@kernel.org>2017-11-10 21:30:45 +0000
committerMark Brown <broonie@kernel.org>2017-11-10 21:30:45 +0000
commit4d0210e6d0aec4b95c762e2af1afa688cc512547 (patch)
tree2f91017daa464223883d9295786ea1c20de0633c /sound
parent60190e46df7fc6e9fe558e3c0aa8af8d70ebc8fa (diff)
parent316b7758c998fb13371d14bb6c9e45ab129c19a7 (diff)
downloadlinux-4d0210e6d0aec4b95c762e2af1afa688cc512547.tar.bz2
Merge remote-tracking branch 'asoc/fix/sunxi' into asoc-linus
Diffstat (limited to 'sound')
-rw-r--r--sound/soc/sunxi/sun8i-codec.c59
1 files changed, 55 insertions, 4 deletions
diff --git a/sound/soc/sunxi/sun8i-codec.c b/sound/soc/sunxi/sun8i-codec.c
index abfb710df7cb..50a9e077f01b 100644
--- a/sound/soc/sunxi/sun8i-codec.c
+++ b/sound/soc/sunxi/sun8i-codec.c
@@ -73,6 +73,7 @@
#define SUN8I_SYS_SR_CTRL_AIF2_FS_MASK GENMASK(11, 8)
#define SUN8I_AIF1CLK_CTRL_AIF1_WORD_SIZ_MASK GENMASK(5, 4)
#define SUN8I_AIF1CLK_CTRL_AIF1_LRCK_DIV_MASK GENMASK(8, 6)
+#define SUN8I_AIF1CLK_CTRL_AIF1_BCLK_DIV_MASK GENMASK(12, 9)
struct sun8i_codec {
struct device *dev;
@@ -170,11 +171,11 @@ static int sun8i_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
/* clock masters */
switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
- case SND_SOC_DAIFMT_CBS_CFS: /* DAI Slave */
- value = 0x0; /* Codec Master */
+ case SND_SOC_DAIFMT_CBS_CFS: /* Codec slave, DAI master */
+ value = 0x1;
break;
- case SND_SOC_DAIFMT_CBM_CFM: /* DAI Master */
- value = 0x1; /* Codec Slave */
+ case SND_SOC_DAIFMT_CBM_CFM: /* Codec Master, DAI slave */
+ value = 0x0;
break;
default:
return -EINVAL;
@@ -226,12 +227,57 @@ static int sun8i_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
return 0;
}
+struct sun8i_codec_clk_div {
+ u8 div;
+ u8 val;
+};
+
+static const struct sun8i_codec_clk_div sun8i_codec_bclk_div[] = {
+ { .div = 1, .val = 0 },
+ { .div = 2, .val = 1 },
+ { .div = 4, .val = 2 },
+ { .div = 6, .val = 3 },
+ { .div = 8, .val = 4 },
+ { .div = 12, .val = 5 },
+ { .div = 16, .val = 6 },
+ { .div = 24, .val = 7 },
+ { .div = 32, .val = 8 },
+ { .div = 48, .val = 9 },
+ { .div = 64, .val = 10 },
+ { .div = 96, .val = 11 },
+ { .div = 128, .val = 12 },
+ { .div = 192, .val = 13 },
+};
+
+static u8 sun8i_codec_get_bclk_div(struct sun8i_codec *scodec,
+ unsigned int rate,
+ unsigned int word_size)
+{
+ unsigned long clk_rate = clk_get_rate(scodec->clk_module);
+ unsigned int div = clk_rate / rate / word_size / 2;
+ unsigned int best_val = 0, best_diff = ~0;
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(sun8i_codec_bclk_div); i++) {
+ const struct sun8i_codec_clk_div *bdiv = &sun8i_codec_bclk_div[i];
+ unsigned int diff = abs(bdiv->div - div);
+
+ if (diff < best_diff) {
+ best_diff = diff;
+ best_val = bdiv->val;
+ }
+ }
+
+ return best_val;
+}
+
static int sun8i_codec_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct snd_soc_dai *dai)
{
struct sun8i_codec *scodec = snd_soc_codec_get_drvdata(dai->codec);
int sample_rate;
+ u8 bclk_div;
/*
* The CPU DAI handles only a sample of 16 bits. Configure the
@@ -241,6 +287,11 @@ static int sun8i_codec_hw_params(struct snd_pcm_substream *substream,
SUN8I_AIF1CLK_CTRL_AIF1_WORD_SIZ_MASK,
SUN8I_AIF1CLK_CTRL_AIF1_WORD_SIZ_16);
+ bclk_div = sun8i_codec_get_bclk_div(scodec, params_rate(params), 16);
+ regmap_update_bits(scodec->regmap, SUN8I_AIF1CLK_CTRL,
+ SUN8I_AIF1CLK_CTRL_AIF1_BCLK_DIV_MASK,
+ bclk_div << SUN8I_AIF1CLK_CTRL_AIF1_BCLK_DIV);
+
regmap_update_bits(scodec->regmap, SUN8I_AIF1CLK_CTRL,
SUN8I_AIF1CLK_CTRL_AIF1_LRCK_DIV_MASK,
SUN8I_AIF1CLK_CTRL_AIF1_LRCK_DIV_16);