diff options
| author | Bard Liao <bardliao@realtek.com> | 2015-03-09 11:55:23 +0300 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2015-03-09 21:12:48 +0300 |
| commit | 485372dc24ca2eaac18ce41a51b9dd017bc11400 (patch) | |
| tree | 3f18931542971cfc56369cc115c1da1e231761de /sound/soc/codecs/rt5670.c | |
| parent | bd22f9d405eb14cc074d294919d0b909e0bc6170 (diff) | |
| download | linux-485372dc24ca2eaac18ce41a51b9dd017bc11400.tar.xz | |
ASoC: rt5670: Check sysclk source by private data
Currently, is_sys_clk_from_pll check sysclk source by reading codec
register value. And it will be invoked before updating dapm widget
power. In some machine driver, snd_soc_dai_set_sysclk is called in
dapm event to switch codec sysclk to RC clock in idle mode. And in
some use cases (such as syspend/resume) hw_params will not be called
when the dapm widget is powered up. As a result, is_sys_clk_from_pll
will return 0 although it is supposed to be 1.
To solve this, we let is_sys_clk_from_pll check sysclk sysclk_src
which is stored in private data and don't change the value of sysclk_src
when codec sysclk is switched to internal clock. The internal clock
can only be used in idle mode, so it sould be fine if we don't set
sysclk_src to internal clock.
Signed-off-by: Bard Liao <bardliao@realtek.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'sound/soc/codecs/rt5670.c')
| -rw-r--r-- | sound/soc/codecs/rt5670.c | 13 |
1 files changed, 5 insertions, 8 deletions
diff --git a/sound/soc/codecs/rt5670.c b/sound/soc/codecs/rt5670.c index 32cd26678bae..9e3bc43178f1 100644 --- a/sound/soc/codecs/rt5670.c +++ b/sound/soc/codecs/rt5670.c @@ -517,11 +517,10 @@ static int set_dmic_clk(struct snd_soc_dapm_widget *w, static int is_sys_clk_from_pll(struct snd_soc_dapm_widget *source, struct snd_soc_dapm_widget *sink) { - unsigned int val; + struct snd_soc_codec *codec = source->codec; + struct rt5670_priv *rt5670 = snd_soc_codec_get_drvdata(codec); - val = snd_soc_read(source->codec, RT5670_GLB_CLK); - val &= RT5670_SCLK_SRC_MASK; - if (val == RT5670_SCLK_SRC_PLL1) + if (rt5670->sysclk_src == RT5670_SCLK_S_PLL1) return 1; else return 0; @@ -2270,9 +2269,6 @@ static int rt5670_set_dai_sysclk(struct snd_soc_dai *dai, struct rt5670_priv *rt5670 = snd_soc_codec_get_drvdata(codec); unsigned int reg_val = 0; - if (freq == rt5670->sysclk && clk_id == rt5670->sysclk_src) - return 0; - switch (clk_id) { case RT5670_SCLK_S_MCLK: reg_val |= RT5670_SCLK_SRC_MCLK; @@ -2290,7 +2286,8 @@ static int rt5670_set_dai_sysclk(struct snd_soc_dai *dai, snd_soc_update_bits(codec, RT5670_GLB_CLK, RT5670_SCLK_SRC_MASK, reg_val); rt5670->sysclk = freq; - rt5670->sysclk_src = clk_id; + if (clk_id != RT5670_SCLK_S_RCCLK) + rt5670->sysclk_src = clk_id; dev_dbg(dai->dev, "Sysclk is %dHz and clock id is %d\n", freq, clk_id); |