ASoC: SOF: amd: acp-pcm: Take buffer information directly from runtime

Instead of using the values from ipc_params, take them directly from
substream->runtime.

This is in preparation of making the platform hw_params callback to be
IPC agnostic.

Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Reviewed-by: Rander Wang <rander.wang@intel.com>
Reviewed-by: Daniel Baluta <daniel.baluta@nxp.com>
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20220304205733.62233-3-pierre-louis.bossart@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>

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

@@ -19,13 +19,14 @@
 int acp_pcm_hw_params(struct snd_sof_dev *sdev, struct snd_pcm_substream *substream,
 		      struct snd_pcm_hw_params *params, struct sof_ipc_stream_params *ipc_params)
 {
-	struct acp_dsp_stream *stream = substream->runtime->private_data;
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	struct acp_dsp_stream *stream = runtime->private_data;
 	unsigned int buf_offset, index;
 	u32 size;
 	int ret;
 
-	size = ipc_params->buffer.size;
-	stream->num_pages = ipc_params->buffer.pages;
+	size = runtime->dma_bytes;
+	stream->num_pages = PFN_UP(runtime->dma_bytes);
 	stream->dmab = substream->runtime->dma_buffer_p;
 
 	ret = acp_dsp_stream_config(sdev, stream);