ASoC: rockchip: spdif: restore register during runtime_suspend/resume cycle

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>
Signed-off-by: Mark Brown <broonie@kernel.org>

1 files changed, 11 insertions, 1 deletions

diff --git a/sound/soc/rockchip/rockchip_spdif.c b/sound/soc/rockchip/rockchip_spdif.c
index 4ca265737eda..fa8101d1e16f 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);
 
@@ -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,