[PATCH v2] ASoC: rockchip: i2s: restore register during runtime_suspend/resume cycle
From: Sugar Zhang <hidden>
Date: 2016-09-06 01:26:15
Also in:
alsa-devel, linux-rockchip, lkml
Subsystem:
arm/rockchip soc support, sound, sound - soc layer / dynamic audio power management (asoc), the rest · Maintainers:
Heiko Stuebner, Jaroslav Kysela, Takashi Iwai, Liam Girdwood, Mark Brown, Linus Torvalds
when step into runtime_suspend, i2s pd will be disabled and loss state. so need to restore register when runtime_resume. Signed-off-by: Sugar Zhang <redacted> --- Changes in v2: - remove system suspend/resume and restore register in runtime_suspend/resume per Doug Anderson's suggestion sound/soc/rockchip/rockchip_i2s.c | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-)
diff --git a/sound/soc/rockchip/rockchip_i2s.c b/sound/soc/rockchip/rockchip_i2s.c
index 652e8c5..98b6822 100644
--- a/sound/soc/rockchip/rockchip_i2s.c
+++ b/sound/soc/rockchip/rockchip_i2s.c@@ -57,6 +57,7 @@ static int i2s_runtime_suspend(struct device *dev) { struct rk_i2s_dev *i2s = dev_get_drvdata(dev); + regcache_cache_only(i2s->regmap, true); clk_disable_unprepare(i2s->mclk); return 0;
@@ -65,7 +66,7 @@ static int i2s_runtime_suspend(struct device *dev) static int i2s_runtime_resume(struct device *dev) { struct rk_i2s_dev *i2s = dev_get_drvdata(dev); - int ret; + int ret = 0; ret = clk_prepare_enable(i2s->mclk); if (ret) {
@@ -73,7 +74,14 @@ static int i2s_runtime_resume(struct device *dev) return ret; } - return 0; + regcache_cache_only(i2s->regmap, false); + regcache_mark_dirty(i2s->regmap); + + ret = regcache_sync(i2s->regmap); + if (ret) + clk_disable_unprepare(i2s->mclk); + + return ret; } static inline struct rk_i2s_dev *to_info(struct snd_soc_dai *dai)
--
1.9.1