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SubjectApplied "ASoC: sun4i-i2s: Pass the channels number as an argument" to the asoc tree
The patch

ASoC: sun4i-i2s: Pass the channels number as an argument

has been applied to the asoc tree at for-5.4

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tree (usually sometime in the next 24 hours) and sent to Linus during
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From 0083a507a78fdfa868acc0709408b59e72488a61 Mon Sep 17 00:00:00 2001
From: Maxime Ripard <>
Date: Mon, 19 Aug 2019 21:25:25 +0200
Subject: [PATCH] ASoC: sun4i-i2s: Pass the channels number as an argument

The channels number have been hardcoded to 2 so far, while the controller
supports more than that.

Remove the instance where it has been hardcoded to compute the BCLK
divider, and pass it through as an argument to ease further support of more

Signed-off-by: Maxime Ripard <>
Signed-off-by: Mark Brown <>
sound/soc/sunxi/sun4i-i2s.c | 8 +++++---
1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/sound/soc/sunxi/sun4i-i2s.c b/sound/soc/sunxi/sun4i-i2s.c
index 4c636f1cf7dc..6b172dfbc25d 100644
--- a/sound/soc/sunxi/sun4i-i2s.c
+++ b/sound/soc/sunxi/sun4i-i2s.c
@@ -238,10 +238,11 @@ static unsigned long sun8i_i2s_get_bclk_parent_rate(const struct sun4i_i2s *i2s)
static int sun4i_i2s_get_bclk_div(struct sun4i_i2s *i2s,
unsigned long parent_rate,
unsigned int sampling_rate,
+ unsigned int channels,
unsigned int word_size)
const struct sun4i_i2s_clk_div *dividers = i2s->variant->bclk_dividers;
- int div = parent_rate / sampling_rate / word_size / 2;
+ int div = parent_rate / sampling_rate / word_size / channels;
int i;

for (i = 0; i < i2s->variant->num_bclk_dividers; i++) {
@@ -286,6 +287,7 @@ static bool sun4i_i2s_oversample_is_valid(unsigned int oversample)

static int sun4i_i2s_set_clk_rate(struct snd_soc_dai *dai,
unsigned int rate,
+ unsigned int channels,
unsigned int word_size)
struct sun4i_i2s *i2s = snd_soc_dai_get_drvdata(dai);
@@ -333,7 +335,7 @@ static int sun4i_i2s_set_clk_rate(struct snd_soc_dai *dai,

bclk_parent_rate = i2s->variant->get_bclk_parent_rate(i2s);
bclk_div = sun4i_i2s_get_bclk_div(i2s, bclk_parent_rate,
- rate, word_size);
+ rate, channels, word_size);
if (bclk_div < 0) {
dev_err(dai->dev, "Unsupported BCLK divider: %d\n", bclk_div);
return -EINVAL;
@@ -488,7 +490,7 @@ static int sun4i_i2s_hw_params(struct snd_pcm_substream *substream,
regmap_field_write(i2s->field_fmt_sr, sr);

return sun4i_i2s_set_clk_rate(dai, params_rate(params),
- params_width(params));
+ 2, params_width(params));

static int sun4i_i2s_set_soc_fmt(const struct sun4i_i2s *i2s,
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