From: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
To: Adam Serbinski <adam@serbinski.com>
Cc: Mark Brown <broonie@kernel.org>, Rob Herring <robh+dt@kernel.org>,
Bjorn Andersson <bjorn.andersson@linaro.org>,
Andy Gross <agross@kernel.org>,
Mark Rutland <mark.rutland@arm.com>,
Liam Girdwood <lgirdwood@gmail.com>,
Patrick Lai <plai@codeaurora.org>,
Banajit Goswami <bgoswami@codeaurora.org>,
Jaroslav Kysela <perex@perex.cz>, Takashi Iwai <tiwai@suse.com>,
alsa-devel@alsa-project.org, linux-arm-msm@vger.kernel.org,
devicetree@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v3 6/6] ASoC: qdsp6: dt-bindings: Add q6afe pcm dt binding documentation
Date: Wed, 12 Feb 2020 11:43:37 +0000 [thread overview]
Message-ID: <b5c1328a-e3ca-826d-9ff0-f2bbce24ac22@linaro.org> (raw)
In-Reply-To: <2989c09149976a28d13d4b4eb10b7c7e@serbinski.com>
On 12/02/2020 11:01, Adam Serbinski wrote:
>>>
>>> +
>>> + - 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.
That's not true atleast by the QDSP documentation,
according to it we will use more slots to transfer at higher sample
rate. ex:
16 kHz data can be transferred using 8 kHz samples in two
slots.
Also there are 32 slots for each of 4 supported channels for PCM AFE port.
>
> 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.
next prev parent reply other threads:[~2020-02-12 11:43 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20200212015222.8229-1-adam@serbinski.com>
2020-02-12 1:52 ` [PATCH v3 1/6] ASoC: qdsp6: dt-bindings: Add q6afe pcm dt binding Adam Serbinski
2020-02-12 1:52 ` [PATCH v3 2/6] ASoC: qdsp6: q6afe: add support to pcm ports Adam Serbinski
2020-02-12 1:52 ` [PATCH v3 3/6] ASoC: qdsp6: q6afe-dai: add support to pcm port dais Adam Serbinski
2020-02-12 9:52 ` Srinivas Kandagatla
2020-02-12 9:53 ` Srinivas Kandagatla
2020-02-12 1:52 ` [PATCH v3 4/6] ASoC: qdsp6: q6routing: add pcm port routing Adam Serbinski
2020-02-12 1:52 ` [PATCH v3 5/6] ASoC: qcom: apq8096: add support for primary and quaternary I2S/PCM Adam Serbinski
2020-02-12 1:52 ` [PATCH v3 6/6] ASoC: qdsp6: dt-bindings: Add q6afe pcm dt binding documentation Adam Serbinski
2020-02-12 9:59 ` Srinivas Kandagatla
2020-02-12 11:01 ` Adam Serbinski
2020-02-12 11:43 ` Srinivas Kandagatla [this message]
2020-02-12 12:07 ` Adam Serbinski
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