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SubjectApplied "ASoC: sun4i-i2s: Fix the MCLK and BCLK dividers on newer SoCs" to the asoc tree
Date
The patch

ASoC: sun4i-i2s: Fix the MCLK and BCLK dividers on newer SoCs

has been applied to the asoc tree at

https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git for-5.4

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark

From c1d3a921d72bd21f266ca28c15213fbe78160a4b Mon Sep 17 00:00:00 2001
From: Maxime Ripard <maxime.ripard@bootlin.com>
Date: Mon, 19 Aug 2019 21:25:16 +0200
Subject: [PATCH] ASoC: sun4i-i2s: Fix the MCLK and BCLK dividers on newer SoCs

From: Marcus Cooper <codekipper@gmail.com>

The clock division dividers have changed between the older (A10/A31) and
newer (H3, A64, etc) SoCs.

While this was addressed through an offset on some SoCs, it was missing
some dividers as well, so the support wasn't perfect. Let's introduce a
pointer in the quirk structure for the divider calculation functions to use
so we can have the proper range now.

Signed-off-by: Marcus Cooper <codekipper@gmail.com>
[Maxime: Fix the commit log, use a field in the quirk structure]
Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>
Link: https://lore.kernel.org/r/0e5b4abf06cd3202354315201c6af44caeb20236.1566242458.git-series.maxime.ripard@bootlin.com
Signed-off-by: Mark Brown <broonie@kernel.org>
---
sound/soc/sunxi/sun4i-i2s.c | 63 ++++++++++++++++++++++++++++---------
1 file changed, 49 insertions(+), 14 deletions(-)

diff --git a/sound/soc/sunxi/sun4i-i2s.c b/sound/soc/sunxi/sun4i-i2s.c
index acfcdb26086a..0a7f1d0f7371 100644
--- a/sound/soc/sunxi/sun4i-i2s.c
+++ b/sound/soc/sunxi/sun4i-i2s.c
@@ -129,8 +129,6 @@ struct sun4i_i2s;
* @has_fmt_set_lrck_period: SoC requires lrclk period to be set.
* @reg_offset_txdata: offset of the tx fifo.
* @sun4i_i2s_regmap: regmap config to use.
- * @mclk_offset: Value by which mclkdiv needs to be adjusted.
- * @bclk_offset: Value by which bclkdiv needs to be adjusted.
* @field_clkdiv_mclk_en: regmap field to enable mclk output.
* @field_fmt_wss: regmap field to set word select size.
* @field_fmt_sr: regmap field to set sample resolution.
@@ -142,8 +140,6 @@ struct sun4i_i2s_quirks {
bool has_fmt_set_lrck_period;
unsigned int reg_offset_txdata; /* TX FIFO */
const struct regmap_config *sun4i_i2s_regmap;
- unsigned int mclk_offset;
- unsigned int bclk_offset;

/* Register fields for i2s */
struct reg_field field_clkdiv_mclk_en;
@@ -152,6 +148,11 @@ struct sun4i_i2s_quirks {
struct reg_field field_fmt_bclk;
struct reg_field field_fmt_lrclk;

+ const struct sun4i_i2s_clk_div *bclk_dividers;
+ unsigned int num_bclk_dividers;
+ const struct sun4i_i2s_clk_div *mclk_dividers;
+ unsigned int num_mclk_dividers;
+
unsigned long (*get_bclk_parent_rate)(const struct sun4i_i2s *);
s8 (*get_sr)(const struct sun4i_i2s *, int);
s8 (*get_wss)(const struct sun4i_i2s *, int);
@@ -208,6 +209,24 @@ static const struct sun4i_i2s_clk_div sun4i_i2s_mclk_div[] = {
/* TODO - extend divide ratio supported by newer SoCs */
};

+static const struct sun4i_i2s_clk_div sun8i_i2s_clk_div[] = {
+ { .div = 1, .val = 1 },
+ { .div = 2, .val = 2 },
+ { .div = 4, .val = 3 },
+ { .div = 6, .val = 4 },
+ { .div = 8, .val = 5 },
+ { .div = 12, .val = 6 },
+ { .div = 16, .val = 7 },
+ { .div = 24, .val = 8 },
+ { .div = 32, .val = 9 },
+ { .div = 48, .val = 10 },
+ { .div = 64, .val = 11 },
+ { .div = 96, .val = 12 },
+ { .div = 128, .val = 13 },
+ { .div = 176, .val = 14 },
+ { .div = 192, .val = 15 },
+};
+
static unsigned long sun4i_i2s_get_bclk_parent_rate(const struct sun4i_i2s *i2s)
{
return i2s->mclk_freq;
@@ -223,11 +242,12 @@ static int sun4i_i2s_get_bclk_div(struct sun4i_i2s *i2s,
unsigned int sampling_rate,
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 i;

- for (i = 0; i < ARRAY_SIZE(sun4i_i2s_bclk_div); i++) {
- const struct sun4i_i2s_clk_div *bdiv = &sun4i_i2s_bclk_div[i];
+ for (i = 0; i < i2s->variant->num_bclk_dividers; i++) {
+ const struct sun4i_i2s_clk_div *bdiv = &dividers[i];

if (bdiv->div == div)
return bdiv->val;
@@ -240,11 +260,12 @@ static int sun4i_i2s_get_mclk_div(struct sun4i_i2s *i2s,
unsigned long parent_rate,
unsigned long mclk_rate)
{
+ const struct sun4i_i2s_clk_div *dividers = i2s->variant->mclk_dividers;
int div = parent_rate / mclk_rate;
int i;

- for (i = 0; i < ARRAY_SIZE(sun4i_i2s_mclk_div); i++) {
- const struct sun4i_i2s_clk_div *mdiv = &sun4i_i2s_mclk_div[i];
+ for (i = 0; i < i2s->variant->num_mclk_dividers; i++) {
+ const struct sun4i_i2s_clk_div *mdiv = &dividers[i];

if (mdiv->div == div)
return mdiv->val;
@@ -326,10 +347,6 @@ static int sun4i_i2s_set_clk_rate(struct snd_soc_dai *dai,
return -EINVAL;
}

- /* Adjust the clock division values if needed */
- bclk_div += i2s->variant->bclk_offset;
- mclk_div += i2s->variant->mclk_offset;
-
regmap_write(i2s->regmap, SUN4I_I2S_CLK_DIV_REG,
SUN4I_I2S_CLK_DIV_BCLK(bclk_div) |
SUN4I_I2S_CLK_DIV_MCLK(mclk_div));
@@ -969,6 +986,10 @@ static const struct sun4i_i2s_quirks sun4i_a10_i2s_quirks = {
.field_fmt_sr = REG_FIELD(SUN4I_I2S_FMT0_REG, 4, 5),
.field_fmt_bclk = REG_FIELD(SUN4I_I2S_FMT0_REG, 6, 6),
.field_fmt_lrclk = REG_FIELD(SUN4I_I2S_FMT0_REG, 7, 7),
+ .bclk_dividers = sun4i_i2s_bclk_div,
+ .num_bclk_dividers = ARRAY_SIZE(sun4i_i2s_bclk_div),
+ .mclk_dividers = sun4i_i2s_mclk_div,
+ .num_mclk_dividers = ARRAY_SIZE(sun4i_i2s_mclk_div),
.get_bclk_parent_rate = sun4i_i2s_get_bclk_parent_rate,
.get_sr = sun4i_i2s_get_sr,
.get_wss = sun4i_i2s_get_wss,
@@ -985,6 +1006,10 @@ static const struct sun4i_i2s_quirks sun6i_a31_i2s_quirks = {
.field_fmt_sr = REG_FIELD(SUN4I_I2S_FMT0_REG, 4, 5),
.field_fmt_bclk = REG_FIELD(SUN4I_I2S_FMT0_REG, 6, 6),
.field_fmt_lrclk = REG_FIELD(SUN4I_I2S_FMT0_REG, 7, 7),
+ .bclk_dividers = sun4i_i2s_bclk_div,
+ .num_bclk_dividers = ARRAY_SIZE(sun4i_i2s_bclk_div),
+ .mclk_dividers = sun4i_i2s_mclk_div,
+ .num_mclk_dividers = ARRAY_SIZE(sun4i_i2s_mclk_div),
.get_bclk_parent_rate = sun4i_i2s_get_bclk_parent_rate,
.get_sr = sun4i_i2s_get_sr,
.get_wss = sun4i_i2s_get_wss,
@@ -1001,6 +1026,10 @@ static const struct sun4i_i2s_quirks sun8i_a83t_i2s_quirks = {
.field_fmt_sr = REG_FIELD(SUN4I_I2S_FMT0_REG, 4, 5),
.field_fmt_bclk = REG_FIELD(SUN4I_I2S_FMT0_REG, 6, 6),
.field_fmt_lrclk = REG_FIELD(SUN4I_I2S_FMT0_REG, 7, 7),
+ .bclk_dividers = sun8i_i2s_clk_div,
+ .num_bclk_dividers = ARRAY_SIZE(sun8i_i2s_clk_div),
+ .mclk_dividers = sun8i_i2s_clk_div,
+ .num_mclk_dividers = ARRAY_SIZE(sun8i_i2s_clk_div),
.get_bclk_parent_rate = sun8i_i2s_get_bclk_parent_rate,
.get_sr = sun8i_i2s_get_sr_wss,
.get_wss = sun8i_i2s_get_sr_wss,
@@ -1012,14 +1041,16 @@ static const struct sun4i_i2s_quirks sun8i_h3_i2s_quirks = {
.has_reset = true,
.reg_offset_txdata = SUN8I_I2S_FIFO_TX_REG,
.sun4i_i2s_regmap = &sun8i_i2s_regmap_config,
- .mclk_offset = 1,
- .bclk_offset = 2,
.has_fmt_set_lrck_period = true,
.field_clkdiv_mclk_en = REG_FIELD(SUN4I_I2S_CLK_DIV_REG, 8, 8),
.field_fmt_wss = REG_FIELD(SUN4I_I2S_FMT0_REG, 0, 2),
.field_fmt_sr = REG_FIELD(SUN4I_I2S_FMT0_REG, 4, 6),
.field_fmt_bclk = REG_FIELD(SUN4I_I2S_FMT0_REG, 7, 7),
.field_fmt_lrclk = REG_FIELD(SUN4I_I2S_FMT0_REG, 19, 19),
+ .bclk_dividers = sun8i_i2s_clk_div,
+ .num_bclk_dividers = ARRAY_SIZE(sun8i_i2s_clk_div),
+ .mclk_dividers = sun8i_i2s_clk_div,
+ .num_mclk_dividers = ARRAY_SIZE(sun8i_i2s_clk_div),
.get_bclk_parent_rate = sun8i_i2s_get_bclk_parent_rate,
.get_sr = sun8i_i2s_get_sr_wss,
.get_wss = sun8i_i2s_get_sr_wss,
@@ -1036,6 +1067,10 @@ static const struct sun4i_i2s_quirks sun50i_a64_codec_i2s_quirks = {
.field_fmt_sr = REG_FIELD(SUN4I_I2S_FMT0_REG, 4, 5),
.field_fmt_bclk = REG_FIELD(SUN4I_I2S_FMT0_REG, 6, 6),
.field_fmt_lrclk = REG_FIELD(SUN4I_I2S_FMT0_REG, 7, 7),
+ .bclk_dividers = sun4i_i2s_bclk_div,
+ .num_bclk_dividers = ARRAY_SIZE(sun4i_i2s_bclk_div),
+ .mclk_dividers = sun4i_i2s_mclk_div,
+ .num_mclk_dividers = ARRAY_SIZE(sun4i_i2s_mclk_div),
.get_bclk_parent_rate = sun4i_i2s_get_bclk_parent_rate,
.get_sr = sun4i_i2s_get_sr,
.get_wss = sun4i_i2s_get_wss,
--
2.20.1
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