ASoC: mt8183: fix audio playback slowly after playback during bootup

Before regmap_reinit_cache we must reset audio regs as default values.
So we use reset controller unit(toprgu) to reset audio hw.
Signed-off-by: Jiaxin Yu <jiaxin.yu@mediatek.com>
Reviewed-by: Yingjoe Chen <yingjoe.chen@mediatek.com>
Link: https://lore.kernel.org/r/1569580317-21181-5-git-send-email-jiaxin.yu@mediatek.comSigned-off-by: Mark Brown <broonie@kernel.org>

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

@@ -11,6 +11,7 @@
 #include <linux/of.h>
 #include <linux/of_address.h>
 #include <linux/pm_runtime.h>
+#include <linux/reset.h>
 
 #include "mt8183-afe-common.h"
 #include "mt8183-afe-clk.h"
@@ -1089,6 +1090,7 @@ static int mt8183_afe_pcm_dev_probe(struct platform_device *pdev)
 	struct mtk_base_afe *afe;
 	struct mt8183_afe_private *afe_priv;
 	struct device *dev;
+	struct reset_control *rstc;
 	int i, irq_id, ret;
 
 	afe = devm_kzalloc(&pdev->dev, sizeof(*afe), GFP_KERNEL);
@@ -1126,6 +1128,19 @@ static int mt8183_afe_pcm_dev_probe(struct platform_device *pdev)
 		return ret;
 	}
 
+	rstc = devm_reset_control_get(dev, "audiosys");
+	if (IS_ERR(rstc)) {
+		ret = PTR_ERR(rstc);
+		dev_err(dev, "could not get audiosys reset:%d\n", ret);
+		return ret;
+	}
+
+	ret = reset_control_reset(rstc);
+	if (ret) {
+		dev_err(dev, "failed to trigger audio reset:%d\n", ret);
+		return ret;
+	}
+
 	/* enable clock for regcache get default value from hw */
 	afe_priv->pm_runtime_bypass_reg_ctl = true;
 	pm_runtime_get_sync(&pdev->dev);