1 files changed, 31 insertions, 0 deletions
diff --git a/sound/soc/sof/intel/hda-stream.c b/sound/soc/sof/intel/hda-stream.c
index 48ea187f72302..8504a4f27b608 100644
--- a/sound/soc/sof/intel/hda-stream.c
+++ b/sound/soc/sof/intel/hda-stream.c
@@ -1095,3 +1095,34 @@ u64 hda_dsp_get_stream_llp(struct snd_sof_dev *sdev,
 
 	return ((u64)llp_u << 32) | llp_l;
 }
+
+/**
+ * hda_dsp_get_stream_ldp - Retrieve the LDP (Linear DMA Position) of the stream
+ * @sdev: SOF device
+ * @component: ASoC component
+ * @substream: PCM substream
+ *
+ * Returns the raw Linear Link Position value
+ */
+u64 hda_dsp_get_stream_ldp(struct snd_sof_dev *sdev,
+			   struct snd_soc_component *component,
+			   struct snd_pcm_substream *substream)
+{
+	struct hdac_stream *hstream = substream->runtime->private_data;
+	struct hdac_ext_stream *hext_stream = stream_to_hdac_ext_stream(hstream);
+	u32 ldp_l, ldp_u;
+
+	/*
+	 * The pphc_addr have been calculated during probe in
+	 * hda_dsp_stream_init():
+	 * pphc_addr = sdev->bar[HDA_DSP_PP_BAR] +
+	 *	       SOF_HDA_PPHC_BASE +
+	 *	       SOF_HDA_PPHC_INTERVAL * stream_index
+	 *
+	 * Use this pre-calculated address to avoid repeated re-calculation.
+	 */
+	ldp_l = readl(hext_stream->pphc_addr + AZX_REG_PPHCLDPL);
+	ldp_u = readl(hext_stream->pphc_addr + AZX_REG_PPHCLDPU);
+
+	return ((u64)ldp_u << 32) | ldp_l;
+}