[alsa-devel][PATCH 2/2] ASoC: fsl_ssi: sound is wrong after suspend/resume
From: Zidan Wang <hidden>
Date: 2015-07-06 08:47:56
Also in:
alsa-devel, 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
The register SFCSR is volatile, but some bits in it need to be recovered after suspend/resume. Signed-off-by: Zidan Wang <redacted> --- sound/soc/fsl/fsl_ssi.c | 12 ++++++++++++ 1 file changed, 12 insertions(+)
diff --git a/sound/soc/fsl/fsl_ssi.c b/sound/soc/fsl/fsl_ssi.c
index 52b894f..e414f18 100644
--- a/sound/soc/fsl/fsl_ssi.c
+++ b/sound/soc/fsl/fsl_ssi.c@@ -262,6 +262,9 @@ struct fsl_ssi_private { unsigned int baudclk_streams; unsigned int bitclk_freq; + /*regcache for SFCSR*/ + u32 regcache_sfcsr; + /* DMA params */ struct snd_dmaengine_dai_dma_data dma_params_tx; struct snd_dmaengine_dai_dma_data dma_params_rx;
@@ -1553,6 +1556,9 @@ static int fsl_ssi_suspend(struct device *dev) struct fsl_ssi_private *ssi_private = dev_get_drvdata(dev); struct regmap *regs = ssi_private->regs; + regmap_read(regs, CCSR_SSI_SFCSR, + &ssi_private->regcache_sfcsr); + regcache_cache_only(regs, true); regcache_mark_dirty(regs);
@@ -1565,6 +1571,12 @@ static int fsl_ssi_resume(struct device *dev) struct regmap *regs = ssi_private->regs; regcache_cache_only(regs, false); + + regmap_update_bits(regs, CCSR_SSI_SFCSR, + CCSR_SSI_SFCSR_RFWM1_MASK | CCSR_SSI_SFCSR_TFWM1_MASK | + CCSR_SSI_SFCSR_RFWM0_MASK | CCSR_SSI_SFCSR_TFWM0_MASK, + ssi_private->regcache_sfcsr); + return regcache_sync(regs); } #endif /* CONFIG_PM_SLEEP */
--
1.9.1