ASoC: amd: acp-pcm-dma: add .delay support

Now ALSA SoC supports .delay for component.
This patch uses it, and not update runtime->delay on .pointer
directly / secretly.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Link: https://lore.kernel.org/r/8735nwy25o.wl-kuninori.morimoto.gx@renesas.com
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/amd/acp-pcm-dma.c

@@ -1003,6 +1003,7 @@ static snd_pcm_uframes_t acp_dma_pointer(struct snd_soc_component *component,
 
 	struct snd_pcm_runtime *runtime = substream->runtime;
 	struct audio_substream_data *rtd = runtime->private_data;
+	struct audio_drv_data *adata = dev_get_drvdata(component->dev);
 
 	if (!rtd)
 		return -EINVAL;
@@ -1023,7 +1024,7 @@ static snd_pcm_uframes_t acp_dma_pointer(struct snd_soc_component *component,
 		}
 		if (bytescount > 0) {
 			delay = do_div(bytescount, period_bytes);
-			runtime->delay = bytes_to_frames(runtime, delay);
+			adata->delay += bytes_to_frames(runtime, delay);
 		}
 	} else {
 		buffersize = frames_to_bytes(runtime, runtime->buffer_size);
@@ -1035,6 +1036,17 @@ static snd_pcm_uframes_t acp_dma_pointer(struct snd_soc_component *component,
 	return bytes_to_frames(runtime, pos);
 }
 
+static snd_pcm_sframes_t acp_dma_delay(struct snd_soc_component *component,
+				       struct snd_pcm_substream *substream)
+{
+	struct audio_drv_data *adata = dev_get_drvdata(component->dev);
+	snd_pcm_sframes_t delay = adata->delay;
+
+	adata->delay = 0;
+
+	return delay;
+}
+
 static int acp_dma_prepare(struct snd_soc_component *component,
 			   struct snd_pcm_substream *substream)
 {
@@ -1198,6 +1210,7 @@ static const struct snd_soc_component_driver acp_asoc_platform = {
 	.hw_params	= acp_dma_hw_params,
 	.trigger	= acp_dma_trigger,
 	.pointer	= acp_dma_pointer,
+	.delay		= acp_dma_delay,
 	.prepare	= acp_dma_prepare,
 	.pcm_construct	= acp_dma_new,
 };

sound/soc/amd/acp.h

@@ -151,6 +151,7 @@ struct audio_drv_data {
 	struct snd_pcm_substream *capture_i2sbt_stream;
 	void __iomem *acp_mmio;
 	u32 asic_type;
+	snd_pcm_sframes_t delay;
 };
 
 /*