ASoC: samsung: spdif: move .suspend/.resume to component

There is no big difference at implementation for .suspend/.resume
between DAI driver and Component driver.
But because some driver is using DAI version, thus ALSA SoC needs
to keep supporting it, hence, framework becoming verbose.
If we can switch all DAI driver .suspend/.resume to Component driver,
we can remove verbose code from ALSA SoC.

Driver is getting its private data via dai->dev.
But dai->dev and component->dev are same dev, thus, we can convert
these. For same reason, we can convert dai->active to
component->active if necessary.

This patch moves DAI driver .suspend/.resume to Component driver
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Link: https://lore.kernel.org/r/874kwrym42.wl-kuninori.morimoto.gx@renesas.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/samsung/spdif.c

@@ -91,6 +91,12 @@ struct samsung_spdif_info {
 static struct snd_dmaengine_dai_dma_data spdif_stereo_out;
 static struct samsung_spdif_info spdif_info;
 
+static inline struct samsung_spdif_info
+*component_to_info(struct snd_soc_component *component)
+{
+	return snd_soc_component_get_drvdata(component);
+}
+
 static inline struct samsung_spdif_info *to_info(struct snd_soc_dai *cpu_dai)
 {
 	return snd_soc_dai_get_drvdata(cpu_dai);
@@ -290,9 +296,9 @@ static void spdif_shutdown(struct snd_pcm_substream *substream,
 }
 
 #ifdef CONFIG_PM
-static int spdif_suspend(struct snd_soc_dai *cpu_dai)
+static int spdif_suspend(struct snd_soc_component *component)
 {
-	struct samsung_spdif_info *spdif = to_info(cpu_dai);
+	struct samsung_spdif_info *spdif = component_to_info(component);
 	u32 con = spdif->saved_con;
 
 	dev_dbg(spdif->dev, "Entered %s\n", __func__);
@@ -307,9 +313,9 @@ static int spdif_suspend(struct snd_soc_dai *cpu_dai)
 	return 0;
 }
 
-static int spdif_resume(struct snd_soc_dai *cpu_dai)
+static int spdif_resume(struct snd_soc_component *component)
 {
-	struct samsung_spdif_info *spdif = to_info(cpu_dai);
+	struct samsung_spdif_info *spdif = component_to_info(component);
 
 	dev_dbg(spdif->dev, "Entered %s\n", __func__);
 
@@ -343,12 +349,12 @@ static struct snd_soc_dai_driver samsung_spdif_dai = {
 				SNDRV_PCM_RATE_96000),
 		.formats = SNDRV_PCM_FMTBIT_S16_LE, },
 	.ops = &spdif_dai_ops,
-	.suspend = spdif_suspend,
-	.resume = spdif_resume,
 };
 
 static const struct snd_soc_component_driver samsung_spdif_component = {
 	.name		= "samsung-spdif",
+	.suspend	= spdif_suspend,
+	.resume		= spdif_resume,
 };
 
 static int spdif_probe(struct platform_device *pdev)