[PATCH 2/3] ASoC: fsl_micfil: Add mclk enable flag
From: Shengjiu Wang <hidden>
Date: 2024-09-27 08:23:21
Also in:
alsa-devel, linux-sound, lkml
Subsystem:
freescale soc sound drivers, sound, sound - soc layer / dynamic audio power management (asoc), the rest · Maintainers:
Shengjiu Wang, Xiubo Li, Jaroslav Kysela, Takashi Iwai, Liam Girdwood, Mark Brown, Linus Torvalds
Previously the mclk is enabled in probe() stage, which is not necessary. Move mclk enablement to hw_params() and mclk disablement to hw_free() will be more efficient. 'mclk_flag' is used for this case. Signed-off-by: Shengjiu Wang <redacted> --- sound/soc/fsl/fsl_micfil.c | 29 +++++++++++++++++++++++------ 1 file changed, 23 insertions(+), 6 deletions(-)
diff --git a/sound/soc/fsl/fsl_micfil.c b/sound/soc/fsl/fsl_micfil.c
index c347cb3a4712..6ecf46e9ac4c 100644
--- a/sound/soc/fsl/fsl_micfil.c
+++ b/sound/soc/fsl/fsl_micfil.c@@ -58,6 +58,7 @@ struct fsl_micfil { int vad_detected; struct fsl_micfil_verid verid; struct fsl_micfil_param param; + bool mclk_flag; /* mclk enable flag */ }; struct fsl_micfil_soc_data {
@@ -693,7 +694,6 @@ static int fsl_micfil_reparent_rootclk(struct fsl_micfil *micfil, unsigned int s clk = micfil->mclk; /* Disable clock first, for it was enabled by pm_runtime */ - clk_disable_unprepare(clk); fsl_asoc_reparent_pll_clocks(dev, clk, micfil->pll8k_clk, micfil->pll11k_clk, ratio); ret = clk_prepare_enable(clk);
@@ -730,6 +730,8 @@ static int fsl_micfil_hw_params(struct snd_pcm_substream *substream, if (ret) return ret; + micfil->mclk_flag = true; + ret = clk_set_rate(micfil->mclk, rate * clk_div * osr * 8); if (ret) return ret;
@@ -764,6 +766,17 @@ static int fsl_micfil_hw_params(struct snd_pcm_substream *substream, return 0; } +static int fsl_micfil_hw_free(struct snd_pcm_substream *substream, + struct snd_soc_dai *dai) +{ + struct fsl_micfil *micfil = snd_soc_dai_get_drvdata(dai); + + clk_disable_unprepare(micfil->mclk); + micfil->mclk_flag = false; + + return 0; +} + static int fsl_micfil_dai_probe(struct snd_soc_dai *cpu_dai) { struct fsl_micfil *micfil = dev_get_drvdata(cpu_dai->dev);
@@ -806,6 +819,7 @@ static const struct snd_soc_dai_ops fsl_micfil_dai_ops = { .startup = fsl_micfil_startup, .trigger = fsl_micfil_trigger, .hw_params = fsl_micfil_hw_params, + .hw_free = fsl_micfil_hw_free, }; static struct snd_soc_dai_driver fsl_micfil_dai = {
@@ -1279,7 +1293,8 @@ static int fsl_micfil_runtime_suspend(struct device *dev) regcache_cache_only(micfil->regmap, true); - clk_disable_unprepare(micfil->mclk); + if (micfil->mclk_flag) + clk_disable_unprepare(micfil->mclk); clk_disable_unprepare(micfil->busclk); return 0;
@@ -1294,10 +1309,12 @@ static int fsl_micfil_runtime_resume(struct device *dev) if (ret < 0) return ret; - ret = clk_prepare_enable(micfil->mclk); - if (ret < 0) { - clk_disable_unprepare(micfil->busclk); - return ret; + if (micfil->mclk_flag) { + ret = clk_prepare_enable(micfil->mclk); + if (ret < 0) { + clk_disable_unprepare(micfil->busclk); + return ret; + } } regcache_cache_only(micfil->regmap, false);
--
2.34.1