Add q6apm mmap and copy compress DAI callbacks to support compress offload playback.
Signed-off-by: Mohammad Rafi Shaik quic_mohs@quicinc.com Co-developed-by: Srinivas Kandagatla srinivas.kandagatla@linaro.org Signed-off-by: Srinivas Kandagatla srinivas.kandagatla@linaro.org --- 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 8ee14822362b..2c0aa2f4caaf 100644 --- a/sound/soc/qcom/qdsp6/q6apm-dai.c +++ b/sound/soc/qcom/qdsp6/q6apm-dai.c @@ -740,6 +740,85 @@ 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_compr(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, @@ -750,6 +829,8 @@ 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 = {