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| author | Linaro CI <ci_notify@linaro.org> | 2020-07-01 07:03:50 +0000 |
|---|---|---|
| committer | Linaro CI <ci_notify@linaro.org> | 2020-07-01 07:03:50 +0000 |
| commit | e16dad5f8f7ec739b0fffa4191c9bb5f37d685d4 (patch) | |
| tree | 5b3f5fdc1efbee532080dce6826adee12a8c6b11 /Documentation | |
| parent | af4c413e851d23be8404d621d0ff74b77f0a9fa7 (diff) | |
| parent | b23c28fe77d938ca6d634a71ea34603ac414019a (diff) | |
Merge remote-tracking branch 'audio/tracking-qcomlt-audio' into integration-linux-qcomlt
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/devicetree/bindings/slimbus/slim-ngd-qcom-ctrl.txt | 1 | ||||
| -rw-r--r-- | Documentation/sound/designs/compress-offload.rst | 84 |
2 files changed, 85 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/slimbus/slim-ngd-qcom-ctrl.txt b/Documentation/devicetree/bindings/slimbus/slim-ngd-qcom-ctrl.txt index e94a2ad3a710..1c615b622d07 100644 --- a/Documentation/devicetree/bindings/slimbus/slim-ngd-qcom-ctrl.txt +++ b/Documentation/devicetree/bindings/slimbus/slim-ngd-qcom-ctrl.txt @@ -14,6 +14,7 @@ Please refer to slimbus/bus.txt for details of the common SLIMBus bindings. must be one of the following. "qcom,slim-ngd-v1.5.0" for MSM8996 "qcom,slim-ngd-v2.1.0" for SDM845 + "qcom,slim-ngd-v2.2.0" for SM8250 - reg: Usage: required diff --git a/Documentation/sound/designs/compress-offload.rst b/Documentation/sound/designs/compress-offload.rst index ad4bfbdacc83..3e241530e173 100644 --- a/Documentation/sound/designs/compress-offload.rst +++ b/Documentation/sound/designs/compress-offload.rst @@ -151,6 +151,58 @@ Modifications include: - Addition of encoding options when required (derived from OpenMAX IL) - Addition of rateControlSupported (missing in OpenMAX AL) +State Machine +============= + +The compressed audio stream state machine is described below :: + + +----------+ + | | + | OPEN | + | | + +----------+ + | + | + | compr_set_params() + | + V + +----------+ + compr_drain_notify() | | + +------------------------>| SETUP | + | | | + | +----------+ + | | + | | + | | compr_write() + | | + | V + | +----------+ + | | | + | | PREPARE | + | | | + | +----------+ + | | + | | + | | compr_start() + | | + | V + +----------+ +----------+ compr_pause() +----------+ + | | | |----------------------->| | + | DRAIN |<-------------------| RUNNING | | PAUSE | + | | | |<-----------------------| | + +----------+ +----------+ compr_resume() +----------+ + | | + | | + | | compr_free() + | | + | V + | +----------+ + | compr_free() | | + +------------------------>| | + | STOP | + | | + +----------+ + Gapless Playback ================ @@ -199,6 +251,38 @@ Sequence flow for gapless would be: (note: order for partial_drain and write for next track can be reversed as well) +Gapless Playback SM +=================== + +For Gapless, we move from running state to partial drain and back, along +with setting of meta_data and signalling for next track :: + + + +----------+ + compr_drain_notify() | | + +------------------------>| RUNNING | + | | | + | +----------+ + | | + | | + | | compr_next_track() + | | + | V + | +----------+ + | | | + | |NEXT_TRACK| + | | | + | +----------+ + | | + | | + | | compr_partial_drain() + | | + | V + | +----------+ + | | | + +------------------------ | PARTIAL_ | + | DRAIN | + +----------+ Not supported ============= |