Messages in this thread | | | Date | Wed, 12 Feb 2020 06:01:46 -0500 | From | Adam Serbinski <> | Subject | Re: [PATCH v3 6/6] ASoC: qdsp6: dt-bindings: Add q6afe pcm dt binding documentation |
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On 2020-02-12 04:59, Srinivas Kandagatla wrote: > On 12/02/2020 01:52, Adam Serbinski wrote: >> This patch adds documentation of bindings required for PCM ports on >> AFE. >> >> Signed-off-by: Adam Serbinski <adam@serbinski.com> >> CC: Andy Gross <agross@kernel.org> >> CC: Mark Rutland <mark.rutland@arm.com> >> CC: Liam Girdwood <lgirdwood@gmail.com> >> CC: Patrick Lai <plai@codeaurora.org> >> CC: Banajit Goswami <bgoswami@codeaurora.org> >> CC: Jaroslav Kysela <perex@perex.cz> >> CC: Takashi Iwai <tiwai@suse.com> >> CC: alsa-devel@alsa-project.org >> CC: linux-arm-msm@vger.kernel.org >> CC: devicetree@vger.kernel.org >> CC: linux-kernel@vger.kernel.org >> --- >> .../devicetree/bindings/sound/qcom,q6afe.txt | 42 >> +++++++++++++++++++ >> 1 file changed, 42 insertions(+) >> >> diff --git a/Documentation/devicetree/bindings/sound/qcom,q6afe.txt >> b/Documentation/devicetree/bindings/sound/qcom,q6afe.txt >> index d74888b9f1bb..6b1b17d31a2a 100644 >> --- a/Documentation/devicetree/bindings/sound/qcom,q6afe.txt >> +++ b/Documentation/devicetree/bindings/sound/qcom,q6afe.txt >> @@ -51,6 +51,24 @@ configuration of each dai. Must contain the >> following properties. >> Definition: Must be list of serial data lines used by this dai. >> should be one or more of the 0-3 sd lines. >> + - qcom,pcm-quantype >> + Usage: required for pcm interface >> + Value type: <u32> >> + Definition: PCM quantization type >> + 0 - ALAW, no padding >> + 1 - MULAW, no padding >> + 2 - Linear, no padding >> + 3 - ALAW, padding >> + 4 - MULAW, padding >> + 5 - Linear, padding >> + >> + - qcom,pcm-slot-mapping >> + Usage: required for pcm interface > > Are these not specific to 8k and 16k mode ? > We should probably list values for both modes here.
No, this is just the offset that the audio sample is placed in with respect to a maximum of 4 slots, 16 bits wide, beginning with the sync pulse.
When switching between 8 and 16k sample rate, it is just the sync pulse rate that is changed. The audio sample will be delivered in the same slot, just at a different frequency.
>> + Value type: <prop-encoded-array> >> + Definition: Slot mapping for audio channels. Array size is the >> number >> + of slots, minimum 1, maximum 4. The value is 0 for no mapping >> + to the slot, or the channel number from 1 to 32. >> + >> - qcom,tdm-sync-mode: >> Usage: required for tdm interface >> Value type: <prop-encoded-array> >> @@ -174,5 +192,29 @@ q6afe@4 { >> reg = <23>; >> qcom,sd-lines = <1>; >> }; >> + >> + pri-pcm-rx@105 { >> + reg = <105>; >> + qcom,pcm-quantype = <2>; >> + qcom,pcm-slot-mapping = <1>; >> + }; >> + >> + pri-pcm-tx@106 { >> + reg = <106>; >> + qcom,pcm-quantype = <2>; >> + qcom,pcm-slot-mapping = <1>; >> + }; >> + >> + quat-pcm-rx@111 { >> + reg = <111>; >> + qcom,pcm-quantype = <5>; >> + qcom,pcm-slot-mapping = <0 0 1>; >> + }; >> + >> + quat-pcm-tx@112 { >> + reg = <112>; >> + qcom,pcm-quantype = <5>; >> + qcom,pcm-slot-mapping = <0 0 1>; >> + }; >> }; >> }; >>
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