diff options
| author | Samuel Holland <samuel@sholland.org> | 2020-10-14 01:19:29 -0500 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2020-10-26 14:56:55 +0000 |
| commit | e511aed79632e8a2dd03068f8bd11b64cb0d7170 (patch) | |
| tree | 3e63849af133475f5e96af7681f75dd8af553f6a /sound/soc/sunxi/sun8i-codec.c | |
| parent | 1abb43aeadfb513c0a16013cd445fb7dd3b285bb (diff) | |
ASoC: sun8i-codec: Round up the LRCK divisor
The codec supports only power-of-two BCLK/LRCK divisors. If either the
slot width or the number of slots is not a power of two, the LRCK
divisor must be rounded up to provide enough space. To do that, use
order_base_2 (instead of ilog2, which rounds down).
Since the rounded divisor is also needed for setting the SYSCLK/BCLK
divisor, return the order base 2 instead of fully calculating the
hardware register encoding.
Acked-by: Maxime Ripard <mripard@kernel.org>
Signed-off-by: Samuel Holland <samuel@sholland.org>
Link: https://lore.kernel.org/r/20201014061941.4306-6-samuel@sholland.org
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'sound/soc/sunxi/sun8i-codec.c')
| -rw-r--r-- | sound/soc/sunxi/sun8i-codec.c | 22 |
1 files changed, 12 insertions, 10 deletions
diff --git a/sound/soc/sunxi/sun8i-codec.c b/sound/soc/sunxi/sun8i-codec.c index 82576066c249..92fcef45097d 100644 --- a/sound/soc/sunxi/sun8i-codec.c +++ b/sound/soc/sunxi/sun8i-codec.c @@ -305,15 +305,15 @@ static u8 sun8i_codec_get_bclk_div(struct sun8i_codec *scodec, return best_val; } -static int sun8i_codec_get_lrck_div(unsigned int channels, - unsigned int word_size) +static int sun8i_codec_get_lrck_div_order(unsigned int slots, + unsigned int slot_width) { - unsigned int div = word_size * channels; + unsigned int div = slots * slot_width; if (div < 16 || div > 256) return -EINVAL; - return ilog2(div) - 4; + return order_base_2(div); } static int sun8i_codec_hw_params(struct snd_pcm_substream *substream, @@ -321,7 +321,9 @@ static int sun8i_codec_hw_params(struct snd_pcm_substream *substream, struct snd_soc_dai *dai) { struct sun8i_codec *scodec = snd_soc_dai_get_drvdata(dai); - int lrck_div, sample_rate, word_size; + unsigned int slots = params_channels(params); + unsigned int slot_width = params_width(params); + int lrck_div_order, sample_rate, word_size; u8 bclk_div; /* word size */ @@ -351,14 +353,14 @@ static int sun8i_codec_hw_params(struct snd_pcm_substream *substream, SUN8I_AIF1CLK_CTRL_AIF1_BCLK_DIV_MASK, bclk_div << SUN8I_AIF1CLK_CTRL_AIF1_BCLK_DIV); - lrck_div = sun8i_codec_get_lrck_div(params_channels(params), - params_physical_width(params)); - if (lrck_div < 0) - return lrck_div; + /* LRCK divider (BCLK/LRCK ratio) */ + lrck_div_order = sun8i_codec_get_lrck_div_order(slots, slot_width); + if (lrck_div_order < 0) + return lrck_div_order; regmap_update_bits(scodec->regmap, SUN8I_AIF1CLK_CTRL, SUN8I_AIF1CLK_CTRL_AIF1_LRCK_DIV_MASK, - lrck_div << SUN8I_AIF1CLK_CTRL_AIF1_LRCK_DIV); + (lrck_div_order - 4) << SUN8I_AIF1CLK_CTRL_AIF1_LRCK_DIV); sample_rate = sun8i_codec_get_hw_rate(params); if (sample_rate < 0) |