[PATCH 07/10] ASoC: mediatek: mt8196: fix runtime resume error handling

[phucduc.bui@gmail.com]

From: bui duc phuc <phucduc.bui@gmail.com>

Propagate errors from regcache_sync() and main clock enable operations
instead of ignoring them.

On failure, restore cache-only mode, disable register access clocks, and
clear the 26M clock request as needed to clean up the runtime resume
state.

Fixes: 7384ecab34eb ("ASoC: mediatek: mt8196: support audio clock control")
Signed-off-by: bui duc phuc <phucduc.bui@gmail.com>
---
 sound/soc/mediatek/mt8196/mt8196-afe-pcm.c | 18 +++++++++++++++---
 1 file changed, 15 insertions(+), 3 deletions(-)

diff --git a/sound/soc/mediatek/mt8196/mt8196-afe-pcm.c b/sound/soc/mediatek/mt8196/mt8196-afe-pcm.c
index dcee037991aa..9888812cd993 100644
--- a/sound/soc/mediatek/mt8196/mt8196-afe-pcm.c
+++ b/sound/soc/mediatek/mt8196/mt8196-afe-pcm.c
@@ -2211,7 +2211,7 @@ static int mt8196_afe_runtime_suspend(struct device *dev)
 static int mt8196_afe_runtime_resume(struct device *dev)
 {
 	struct mtk_base_afe *afe = dev_get_drvdata(dev);
-	int ret = 0;
+	int ret;
 
 	ret = mt8196_afe_enable_reg_rw_clk(afe);
 	if (ret)
@@ -2222,7 +2222,9 @@ static int mt8196_afe_runtime_resume(struct device *dev)
 		goto skip_regmap;
 	}
 	regcache_cache_only(afe->regmap, false);
-	regcache_sync(afe->regmap);
+	ret = regcache_sync(afe->regmap);
+	if (ret)
+		goto err_set_cache_only;
 
 	/* set audio 26M request */
 	regmap_update_bits(afe->regmap, AFE_SPM_CONTROL_REQ, 0x1, 0x1);
@@ -2233,10 +2235,20 @@ static int mt8196_afe_runtime_resume(struct device *dev)
 			   CPU_HD_ALIGN_MASK_SFT, 0 << CPU_HD_ALIGN_SFT);
 
 	/* enable AFE */
-	mt8196_afe_enable_main_clock(afe);
+	ret = mt8196_afe_enable_main_clock(afe);
+	if (ret)
+		goto err_reset_26m_req;
 
 skip_regmap:
 	return 0;
+
+err_reset_26m_req:
+	regmap_update_bits(afe->regmap, AFE_SPM_CONTROL_REQ, 0x1, 0x0);
+err_set_cache_only:
+	regcache_cache_only(afe->regmap, true);
+	mt8196_afe_disable_reg_rw_clk(afe);
+
+	return ret;
 }
 
 static int mt8196_afe_component_probe(struct snd_soc_component *component)
-- 
2.43.0