ASoC: mediatek: mt8183: Fix probe resource cleanup

Cássio Gabriel <cassiogabrielcontato@gmail.com> says:

The MT8183 AFE probe has two cleanup gaps that match issues
recently fixed in newer MediaTek AFE drivers.

First, reserved memory assigned with of_reserved_mem_device_init()
is never released on driver removal or later probe failures.

Second, the probe-time runtime PM resume used before reinitializing
the regmap cache is unchecked, and a regmap_reinit_cache() failure
skips the temporary PM put.

Fix both issues with a devm reserved-memory release action and
checked runtime PM resume handling.

Link: https://patch.msgid.link/20260527-asoc-mt8183-probe-cleanup-v1-0-4f4f5593c8d1@gmail.com

Author: broonie

sound/soc/mediatek/mt8183/mt8183-afe-pcm.c

@@ -766,6 +766,11 @@ static const dai_register_cb dai_register_cbs[] = {
 	mt8183_dai_memif_register,
 };
 
+static void mt8183_afe_release_reserved_mem(void *data)
+{
+	of_reserved_mem_device_release(data);
+}
+
 static int mt8183_afe_pcm_dev_probe(struct platform_device *pdev)
 {
 	struct mtk_base_afe *afe;
@@ -794,6 +799,12 @@ static int mt8183_afe_pcm_dev_probe(struct platform_device *pdev)
 	if (ret) {
 		dev_info(dev, "no reserved memory found, pre-allocating buffers instead\n");
 		afe->preallocate_buffers = true;
+	} else {
+		ret = devm_add_action_or_reset(dev,
+					       mt8183_afe_release_reserved_mem,
+					       dev);
+		if (ret)
+			return ret;
 	}
 
 	/* initial audio related clock */
@@ -833,17 +844,21 @@ static int mt8183_afe_pcm_dev_probe(struct platform_device *pdev)
 
 	/* enable clock for regcache get default value from hw */
 	afe_priv->pm_runtime_bypass_reg_ctl = true;
-	pm_runtime_get_sync(dev);
-
-	ret = regmap_reinit_cache(afe->regmap, &mt8183_afe_regmap_config);
+	ret = pm_runtime_resume_and_get(dev);
 	if (ret) {
-		dev_err(dev, "regmap_reinit_cache fail, ret %d\n", ret);
+		afe_priv->pm_runtime_bypass_reg_ctl = false;
 		goto err_pm_disable;
 	}
 
+	ret = regmap_reinit_cache(afe->regmap, &mt8183_afe_regmap_config);
 	pm_runtime_put_sync(dev);
 	afe_priv->pm_runtime_bypass_reg_ctl = false;
 
+	if (ret) {
+		dev_err(dev, "regmap_reinit_cache fail, ret %d\n", ret);
+		goto err_pm_disable;
+	}
+
 	regcache_cache_only(afe->regmap, true);
 	regcache_mark_dirty(afe->regmap);