Messages in this thread Patch in this message | | | From | Sugar Zhang <> | Subject | [PATCH v2] ASoC: rockchip: spdif: restore register during runtime_suspend/resume cycle | Date | Tue, 6 Sep 2016 09:23:55 +0800 |
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when step into runtime_suspend, spdif pd will be disabled and loss state. so need to restore register when runtime_resume.
Signed-off-by: Sugar Zhang <sugar.zhang@rock-chips.com>
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Changes in v2: - remove system suspend/resume and restore register in runtime_suspend/resume per Doug Anderson's suggestion
sound/soc/rockchip/rockchip_spdif.c | 14 ++++++++++++-- 1 file changed, 12 insertions(+), 2 deletions(-)
diff --git a/sound/soc/rockchip/rockchip_spdif.c b/sound/soc/rockchip/rockchip_spdif.c index 4ca2657..0eb8d49 100644 --- a/sound/soc/rockchip/rockchip_spdif.c +++ b/sound/soc/rockchip/rockchip_spdif.c @@ -65,6 +65,7 @@ static int __maybe_unused rk_spdif_runtime_suspend(struct device *dev) { struct rk_spdif_dev *spdif = dev_get_drvdata(dev); + regcache_cache_only(spdif->regmap, true); clk_disable_unprepare(spdif->mclk); clk_disable_unprepare(spdif->hclk); @@ -74,7 +75,7 @@ static int __maybe_unused rk_spdif_runtime_suspend(struct device *dev) static int __maybe_unused rk_spdif_runtime_resume(struct device *dev) { struct rk_spdif_dev *spdif = dev_get_drvdata(dev); - int ret; + int ret = 0; ret = clk_prepare_enable(spdif->mclk); if (ret) { @@ -88,7 +89,16 @@ static int __maybe_unused rk_spdif_runtime_resume(struct device *dev) return ret; } - return 0; + regcache_cache_only(spdif->regmap, false); + regcache_mark_dirty(spdif->regmap); + + ret = regcache_sync(spdif->regmap); + if (ret) { + clk_disable_unprepare(spdif->mclk); + clk_disable_unprepare(spdif->hclk); + } + + return ret; } static int rk_spdif_hw_params(struct snd_pcm_substream *substream, -- 1.9.1
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