The patch

ASoC: sun8i-codec: Invert Master / Slave condition

has been applied to the asoc tree at

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

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 560bfe774f058e97596f30ff71cffdac52b72914 Mon Sep 17 00:00:00 2001

From: Maxime Ripard maxime.ripard@free-electrons.com Date: Wed, 8 Nov 2017 16:47:08 +0100 Subject: [PATCH] ASoC: sun8i-codec: Invert Master / Slave condition

The current code had the condition backward when checking if the codec should be running in slave or master mode.

Fix it, and make the comment a bit more readable.

Fixes: 36c684936fae ("ASoC: Add sun8i digital audio codec") Signed-off-by: Maxime Ripard maxime.ripard@free-electrons.com Reviewed-by: Chen-Yu Tsai wens@csie.org Signed-off-by: Mark Brown broonie@kernel.org Cc: stable@vger.kernel.org --- sound/soc/sunxi/sun8i-codec.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/sound/soc/sunxi/sun8i-codec.c b/sound/soc/sunxi/sun8i-codec.c index abfb710df7cb..038107baf414 100644 --- a/sound/soc/sunxi/sun8i-codec.c +++ b/sound/soc/sunxi/sun8i-codec.c @@ -170,11 +170,11 @@ 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;

On Wed, Nov 8, 2017 at 11:47 PM, Maxime Ripard maxime.ripard@free-electrons.com wrote:

While the current code was reporting to be able to work in master mode, it failed to do so because the BCLK divider wasn't programmed, meaning that the BCLK would run at the PLL's frequency no matter the sample rate.

It was obviously a bit too fast.

Add support to retrieve the divider to use, and set it. Since our PLL is not always able to generate a perfect multiple of the sample rate, we'll have to choose the closest divider that matches our setup.

Fixes: 36c684936fae ("ASoC: Add sun8i digital audio codec") Cc: stable@vger.kernel.org Signed-off-by: Maxime Ripard maxime.ripard@free-electrons.com

---

sound/soc/sunxi/sun8i-codec.c | 53 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 53 insertions(+)

diff --git a/sound/soc/sunxi/sun8i-codec.c b/sound/soc/sunxi/sun8i-codec.c index 038107baf414..522546e6b153 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; @@ -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 +287,13 @@ 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);

This looks like it's using 16 bit words regardless of the settings in params.

•   bclk_div = sun8i_codec_get_bclk_div(scodec, params_rate(params),
  

•                                       params_width(params));
  

But here you pass params_width(params). Seems a bit error prone.

Otherwise,

Reviewed-by: Chen-Yu Tsai wens@csie.org

•   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);
  

-- 2.14.3

On Wed, Nov 8, 2017 at 11:47 PM, Maxime Ripard maxime.ripard@free-electrons.com wrote:

Since its introduction, the codec had an inversion of the left and right channels. It turned out to be pretty simple as it appears that the codec doesn't have the same polarity on the LRCK signal than the I2S block.

Fix this by inverting our bit value for the LRCK inversion.

Fixes: 36c684936fae ("ASoC: Add sun8i digital audio codec") Cc: stable@vger.kernel.org Signed-off-by: Maxime Ripard maxime.ripard@free-electrons.com

I suggest adding a comment in case anyone stumbles across it.

Otherwise,

Reviewed-by: Chen-Yu Tsai wens@csie.org

---

sound/soc/sunxi/sun8i-codec.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sound/soc/sunxi/sun8i-codec.c b/sound/soc/sunxi/sun8i-codec.c index 522546e6b153..c8dcb1502d74 100644 --- a/sound/soc/sunxi/sun8i-codec.c +++ b/sound/soc/sunxi/sun8i-codec.c @@ -200,7 +200,7 @@ static int sun8i_set_fmt(struct snd_soc_dai *dai, unsigned int fmt) value << SUN8I_AIF1CLK_CTRL_AIF1_BCLK_INV); regmap_update_bits(scodec->regmap, SUN8I_AIF1CLK_CTRL, BIT(SUN8I_AIF1CLK_CTRL_AIF1_LRCK_INV),

•                      value << SUN8I_AIF1CLK_CTRL_AIF1_LRCK_INV);
  

•                      !value << SUN8I_AIF1CLK_CTRL_AIF1_LRCK_INV);
  
    /* DAI format */
    switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
  

-- 2.14.3