Add q6apm mmap and copy compress DAI callbacks to support compress
offload playback.
Co-developed-by: Mohammad Rafi Shaik <quic_mohs@xxxxxxxxxxx>
Signed-off-by: Mohammad Rafi Shaik <quic_mohs@xxxxxxxxxxx>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@xxxxxxxxxx>
---
sound/soc/qcom/qdsp6/q6apm-dai.c | 81 ++++++++++++++++++++++++++++++++
1 file changed, 81 insertions(+)
diff --git a/sound/soc/qcom/qdsp6/q6apm-dai.c b/sound/soc/qcom/qdsp6/q6apm-dai.c
index c67147e5388b..5eb0b864c740 100644
--- a/sound/soc/qcom/qdsp6/q6apm-dai.c
+++ b/sound/soc/qcom/qdsp6/q6apm-dai.c
@@ -737,6 +737,85 @@ static int q6apm_dai_compr_set_metadata(struct snd_soc_component *component,
return ret;
}
+static int q6apm_dai_compr_mmap(struct snd_soc_component *component,
+ struct snd_compr_stream *stream,
+ struct vm_area_struct *vma)
+{
+ struct snd_compr_runtime *runtime = stream->runtime;
+ struct q6apm_dai_rtd *prtd = runtime->private_data;
+ struct device *dev = component->dev;
+
+ return dma_mmap_coherent(dev, vma, prtd->dma_buffer.area, prtd->dma_buffer.addr,
+ prtd->dma_buffer.bytes);
+}
+
+static int q6apm_compr_copy(struct snd_soc_component *component,
+ struct snd_compr_stream *stream, char __user *buf,
+ size_t count)
+{
+ struct snd_compr_runtime *runtime = stream->runtime;
+ struct q6apm_dai_rtd *prtd = runtime->private_data;
+ void *dstn;
+ unsigned long flags;
+ size_t copy;
+ u32 wflags = 0;
+ u32 app_pointer;
+ u32 bytes_received;
+ uint32_t bytes_to_write;
+ int avail, bytes_in_flight = 0;
+
+ bytes_received = prtd->bytes_received;
+
+ /**
+ * Make sure that next track data pointer is aligned at 32 bit boundary
+ * This is a Mandatory requirement from DSP data buffers alignment
+ */
+ if (prtd->next_track)
+ bytes_received = ALIGN(prtd->bytes_received, prtd->pcm_count);
+
+ app_pointer = bytes_received/prtd->pcm_size;
+ app_pointer = bytes_received - (app_pointer * prtd->pcm_size);
+ dstn = prtd->dma_buffer.area + app_pointer;
+
+ if (count < prtd->pcm_size - app_pointer) {
+ if (copy_from_user(dstn, buf, count))
+ return -EFAULT;
+ } else {
+ copy = prtd->pcm_size - app_pointer;
+ if (copy_from_user(dstn, buf, copy))
+ return -EFAULT;
+ if (copy_from_user(prtd->dma_buffer.area, buf + copy, count - copy))
+ return -EFAULT;
+ }
+
+ spin_lock_irqsave(&prtd->lock, flags);
+ bytes_in_flight = prtd->bytes_received - prtd->copied_total;
+
+ if (prtd->next_track) {
+ prtd->next_track = false;
+ prtd->copied_total = ALIGN(prtd->copied_total, prtd->pcm_count);
+ prtd->bytes_sent = ALIGN(prtd->bytes_sent, prtd->pcm_count);
+ }
+
+ prtd->bytes_received = bytes_received + count;
+
+ /* Kick off the data to dsp if its starving!! */
+ if (prtd->state == Q6APM_STREAM_RUNNING && (bytes_in_flight == 0)) {
+ bytes_to_write = prtd->pcm_count;
+ avail = prtd->bytes_received - prtd->bytes_sent;
+
+ if (avail < prtd->pcm_count)
+ bytes_to_write = avail;
+
+ q6apm_write_async(prtd->graph, bytes_to_write, 0, 0, wflags);
+ prtd->bytes_sent += bytes_to_write;
+ }
+
+ spin_unlock_irqrestore(&prtd->lock, flags);
+
+ return count;
+}
+
static const struct snd_compress_ops q6apm_dai_compress_ops = {
.open = q6apm_dai_compr_open,
.free = q6apm_dai_compr_free,
@@ -747,6 +826,8 @@ static const struct snd_compress_ops q6apm_dai_compress_ops = {
.ack = q6apm_dai_compr_ack,
.set_params = q6apm_dai_compr_set_params,
.set_metadata = q6apm_dai_compr_set_metadata,
+ .mmap = q6apm_dai_compr_mmap,
+ .copy = q6apm_compr_copy,
};
static const struct snd_soc_component_driver q6apm_fe_dai_component = {
--
2.21.0
