Add support to gapless playback by implementing metadata, next_track, drain and partial drain support.
Gapless on Q6ASM is implemented by opening 2 streams in a single q6asm stream and toggling them on next track.
Signed-off-by: Srinivas Kandagatla srinivas.kandagatla@linaro.org --- sound/soc/qcom/qdsp6/q6asm-dai.c | 103 +++++++++++++++++++++++++++++-- sound/soc/qcom/qdsp6/q6asm.h | 1 + 2 files changed, 98 insertions(+), 6 deletions(-)
diff --git a/sound/soc/qcom/qdsp6/q6asm-dai.c b/sound/soc/qcom/qdsp6/q6asm-dai.c index 420aaaa67788..4ecf9cb658ae 100644 --- a/sound/soc/qcom/qdsp6/q6asm-dai.c +++ b/sound/soc/qcom/qdsp6/q6asm-dai.c @@ -67,11 +67,14 @@ struct q6asm_dai_rtd { uint16_t bits_per_sample; uint16_t source; /* Encoding source bit mask */ struct audio_client *audio_client; + uint32_t next_track_stream_id; + bool next_track; uint32_t stream_id; uint16_t session_id; enum stream_state state; uint32_t initial_samples_drop; uint32_t trailing_samples_drop; + bool notify_on_drain; };
struct q6asm_dai_data { @@ -510,13 +513,19 @@ static void compress_event_handler(uint32_t opcode, uint32_t token, struct q6asm_dai_rtd *prtd = priv; struct snd_compr_stream *substream = prtd->cstream; unsigned long flags; + u32 wflags = 0; uint64_t avail; - uint32_t bytes_written; + uint32_t bytes_written, bytes_to_write; + bool is_last_buffer = false;
switch (opcode) { case ASM_CLIENT_EVENT_CMD_RUN_DONE: spin_lock_irqsave(&prtd->lock, flags); if (!prtd->bytes_sent) { + q6asm_stream_remove_initial_silence(prtd->audio_client, + prtd->stream_id, + prtd->initial_samples_drop); + q6asm_write_async(prtd->audio_client, prtd->stream_id, prtd->pcm_count, 0, 0, 0); prtd->bytes_sent += prtd->pcm_count; @@ -526,7 +535,30 @@ static void compress_event_handler(uint32_t opcode, uint32_t token, break;
case ASM_CLIENT_EVENT_CMD_EOS_DONE: - prtd->state = Q6ASM_STREAM_STOPPED; + spin_lock_irqsave(&prtd->lock, flags); + if (prtd->notify_on_drain) { + if (substream->partial_drain) { + /* + * Close old stream and make it stale, switch + * the active stream now! + */ + q6asm_cmd_nowait(prtd->audio_client, + prtd->stream_id, + CMD_CLOSE); + /* + * vaild stream ids start from 1, So we are + * toggling this between 1 and 2. + */ + prtd->stream_id = (prtd->stream_id == 1 ? 2 : 1); + } + + snd_compr_drain_notify(prtd->cstream); + prtd->notify_on_drain = false; + + } else { + prtd->state = Q6ASM_STREAM_STOPPED; + } + spin_unlock_irqrestore(&prtd->lock, flags); break;
case ASM_CLIENT_EVENT_DATA_WRITE_DONE: @@ -542,13 +574,32 @@ static void compress_event_handler(uint32_t opcode, uint32_t token, }
avail = prtd->bytes_received - prtd->bytes_sent; + if (avail > prtd->pcm_count) { + bytes_to_write = prtd->pcm_count; + } else { + if (substream->partial_drain || prtd->notify_on_drain) + is_last_buffer = true; + bytes_to_write = avail; + } + + if (bytes_to_write) { + if (substream->partial_drain && is_last_buffer) { + wflags |= ASM_LAST_BUFFER_FLAG; + q6asm_stream_remove_trailing_silence(prtd->audio_client, + prtd->stream_id, + prtd->trailing_samples_drop); + }
- if (avail >= prtd->pcm_count) { q6asm_write_async(prtd->audio_client, prtd->stream_id, - prtd->pcm_count, 0, 0, 0); - prtd->bytes_sent += prtd->pcm_count; + bytes_to_write, 0, 0, wflags); + + prtd->bytes_sent += bytes_to_write; }
+ if (prtd->notify_on_drain && is_last_buffer) + q6asm_cmd_nowait(prtd->audio_client, + prtd->stream_id, CMD_EOS); + spin_unlock_irqrestore(&prtd->lock, flags); break;
@@ -628,9 +679,15 @@ static int q6asm_dai_compr_free(struct snd_soc_component *component, struct snd_soc_pcm_runtime *rtd = stream->private_data;
if (prtd->audio_client) { - if (prtd->state) + if (prtd->state) { q6asm_cmd(prtd->audio_client, prtd->stream_id, CMD_CLOSE); + if (prtd->next_track_stream_id) { + q6asm_cmd(prtd->audio_client, + prtd->next_track_stream_id, + CMD_CLOSE); + } + }
snd_dma_free_pages(&prtd->dma_buffer); q6asm_unmap_memory_regions(stream->direction, @@ -905,6 +962,32 @@ static int q6asm_dai_compr_set_metadata(struct snd_soc_component *component, break; case SNDRV_COMPRESS_ENCODER_DELAY: prtd->initial_samples_drop = metadata->value[0]; + if (prtd->next_track_stream_id) { + ret = q6asm_open_write(prtd->audio_client, + prtd->next_track_stream_id, + prtd->codec.id, + prtd->codec.profile, + prtd->bits_per_sample, + true); + if (ret < 0) { + dev_err(component->dev, "q6asm_open_write failed\n"); + return ret; + } + ret = __q6asm_dai_compr_set_codec_params(component, stream, + &prtd->codec, + prtd->next_track_stream_id); + if (ret < 0) { + dev_err(component->dev, "q6asm_open_write failed\n"); + return ret; + } + + ret = q6asm_stream_remove_initial_silence(prtd->audio_client, + prtd->next_track_stream_id, + prtd->initial_samples_drop); + prtd->next_track_stream_id = 0; + + } + break; default: ret = -EINVAL; @@ -938,6 +1021,14 @@ static int q6asm_dai_compr_trigger(struct snd_soc_component *component, ret = q6asm_cmd_nowait(prtd->audio_client, prtd->stream_id, CMD_PAUSE); break; + case SND_COMPR_TRIGGER_NEXT_TRACK: + prtd->next_track = true; + prtd->next_track_stream_id = (prtd->stream_id == 1 ? 2 : 1); + break; + case SND_COMPR_TRIGGER_DRAIN: + case SND_COMPR_TRIGGER_PARTIAL_DRAIN: + prtd->notify_on_drain = true; + break; default: ret = -EINVAL; break; diff --git a/sound/soc/qcom/qdsp6/q6asm.h b/sound/soc/qcom/qdsp6/q6asm.h index f20e1441988f..82e584aa534f 100644 --- a/sound/soc/qcom/qdsp6/q6asm.h +++ b/sound/soc/qcom/qdsp6/q6asm.h @@ -33,6 +33,7 @@ enum {
#define MAX_SESSIONS 8 #define FORMAT_LINEAR_PCM 0x0000 +#define ASM_LAST_BUFFER_FLAG BIT(30)
struct q6asm_flac_cfg { u32 sample_rate;