diff options
| author |   Mark Brown <broonie@opensource.wolfsonmicro.com> | 2012-04-05 12:55:20 +0100 |
|---|---|---|
| committer | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2012-04-10 11:11:22 +0100 |
| commit | 20dc24a951f4792070803d8f1838c8ed3f4e5d57 (patch) | |
| tree | b111a1254243eb8ae8901f1a3448802900c752e4 /sound/soc/codecs/wm8994.c | |
| parent | ASoC: wm8994: Don't test for NULL before release_firmware() (diff) | |
| download | linux-dev-20dc24a951f4792070803d8f1838c8ed3f4e5d57.tar.xz linux-dev-20dc24a951f4792070803d8f1838c8ed3f4e5d57.zip | |
ASoC: wm8994: Implement FLL bypass support
Later WM8994 class devices can bypass the FLL from BCLK. Do this
automatically when the FLL input and output frequencies match up.
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Diffstat (limited to 'sound/soc/codecs/wm8994.c')
| -rw-r--r-- | sound/soc/codecs/wm8994.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/sound/soc/codecs/wm8994.c b/sound/soc/codecs/wm8994.c index 8b05e78b11c9..01ecdb56ecdc 100644 --- a/sound/soc/codecs/wm8994.c +++ b/sound/soc/codecs/wm8994.c @@ -1977,6 +1977,14 @@ static int _wm8994_set_fll(struct snd_soc_codec *codec, int id, int src, snd_soc_update_bits(codec, WM8994_FLL1_CONTROL_1 + reg_offset, WM8994_FLL1_ENA, 0); + if (wm8994->fll_byp && src == WM8994_FLL_SRC_BCLK && + freq_in == freq_out) { + dev_dbg(codec->dev, "Bypassing FLL%d\n", id + 1); + snd_soc_update_bits(codec, WM8994_FLL1_CONTROL_5 + reg_offset, + WM8958_FLL1_BYP, WM8958_FLL1_BYP); + goto out; + } + reg = (fll.outdiv << WM8994_FLL1_OUTDIV_SHIFT) | (fll.fll_fratio << WM8994_FLL1_FRATIO_SHIFT); snd_soc_update_bits(codec, WM8994_FLL1_CONTROL_2 + reg_offset, @@ -1991,6 +1999,7 @@ static int _wm8994_set_fll(struct snd_soc_codec *codec, int id, int src, fll.n << WM8994_FLL1_N_SHIFT); snd_soc_update_bits(codec, WM8994_FLL1_CONTROL_5 + reg_offset, + WM8958_FLL1_BYP | WM8994_FLL1_REFCLK_DIV_MASK | WM8994_FLL1_REFCLK_SRC_MASK, (fll.clk_ref_div << WM8994_FLL1_REFCLK_DIV_SHIFT) | @@ -2053,6 +2062,7 @@ static int _wm8994_set_fll(struct snd_soc_codec *codec, int id, int src, } } +out: wm8994->fll[id].in = freq_in; wm8994->fll[id].out = freq_out; wm8994->fll[id].src = src; @@ -3579,6 +3589,14 @@ static int wm8994_codec_probe(struct snd_soc_codec *codec) case WM8958: wm8994->hubs.dcs_readback_mode = 1; wm8994->hubs.hp_startup_mode = 1; + + switch (wm8994->revision) { + case 0: + break; + default: + wm8994->fll_byp = true; + break; + } break; case WM1811: @@ -3586,6 +3604,7 @@ static int wm8994_codec_probe(struct snd_soc_codec *codec) wm8994->hubs.no_series_update = 1; wm8994->hubs.hp_startup_mode = 1; wm8994->hubs.no_cache_class_w = true; + wm8994->fll_byp = true; switch (wm8994->revision) { case 0: |