Bitclk is derived from sysclk using bclk_divs. Sysclk can be derived in two ways: (1) directly from MLCK (2) MCLK via PLL
Commit 3c01b9ee2ab9d0d ("ASoC: codec: wm8960: Relax bit clock computation") relaxed bitclk computation when sysclk is directly derived from MCLK.
Lets do the same thing when sysclk is derived via PLL.
Signed-off-by: Daniel Baluta daniel.baluta@nxp.com Acked-by: Charles Keepax ckeepax@opensource.wolfsonmicro.com --- sound/soc/codecs/wm8960.c | 14 +++++++++++++- 1 file changed, 13 insertions(+), 1 deletion(-)
diff --git a/sound/soc/codecs/wm8960.c b/sound/soc/codecs/wm8960.c index 1c973f0..8ab9fa2 100644 --- a/sound/soc/codecs/wm8960.c +++ b/sound/soc/codecs/wm8960.c @@ -679,6 +679,10 @@ int wm8960_configure_sysclk(struct wm8960_priv *wm8960, int mclk, * - freq_out = sysclk * sysclk_divs * - 10 * sysclk = bclk * bclk_divs * + * If we cannot find an exact match for (sysclk, lrclk, bclk) + * triplet, we relax the bclk such that bclk is chosen as the + * closest available frequency greater than expected bclk. + * * @codec: codec structure * @freq_in: input frequency used to derive freq out via PLL * @sysclk_idx: sysclk_divs index for found sysclk @@ -696,11 +700,12 @@ int wm8960_configure_pll(struct snd_soc_codec *codec, int freq_in, { struct wm8960_priv *wm8960 = snd_soc_codec_get_drvdata(codec); int sysclk, bclk, lrclk, freq_out; - int diff, best_freq_out = 0; + int diff, closest, best_freq_out = 0; int i, j, k;
bclk = wm8960->bclk; lrclk = wm8960->lrclk; + closest = freq_in;
*bclk_idx = *dac_idx = *sysclk_idx = -1;
@@ -723,6 +728,13 @@ int wm8960_configure_pll(struct snd_soc_codec *codec, int freq_in, best_freq_out = freq_out; break; } + if (diff > 0 && closest > diff) { + *sysclk_idx = i; + *dac_idx = j; + *bclk_idx = k; + closest = diff; + best_freq_out = freq_out; + } } if (k != ARRAY_SIZE(bclk_divs)) break;