From: Jon Hunter <jonathanh@nvidia.com>
To: "Michał Mirosław" <mirq-linux@rere.qmqm.pl>,
"Sameer Pujar" <spujar@nvidia.com>
Cc: <broonie@kernel.org>, <lgirdwood@gmail.com>, <robh+dt@kernel.org>,
<kuninori.morimoto.gx@renesas.com>,
<pierre-louis.bossart@linux.intel.com>, <perex@perex.cz>,
<tiwai@suse.com>, <thierry.reding@gmail.com>,
<alsa-devel@alsa-project.org>, <devicetree@vger.kernel.org>,
<linux-tegra@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
<sharadg@nvidia.com>, <mkumard@nvidia.com>,
<viswanathl@nvidia.com>, <rlokhande@nvidia.com>,
<dramesh@nvidia.com>, <atalambedu@nvidia.com>,
<nwartikar@nvidia.com>, <swarren@nvidia.com>,
<nicoleotsuka@gmail.com>
Subject: Re: [PATCH v3 10/13] ASoC: tegra: Add audio graph based card driver
Date: Thu, 1 Oct 2020 20:44:44 +0100 [thread overview]
Message-ID: <85fe1be4-7b67-da99-06a5-28089f662a1d@nvidia.com> (raw)
In-Reply-To: <20201001190733.GD23339@qmqm.qmqm.pl>
On 01/10/2020 20:07, Michał Mirosław wrote:
> On Thu, Oct 01, 2020 at 11:03:04PM +0530, Sameer Pujar wrote:
>> Add Tegra audio machine driver which is based on generic audio graph card
>> driver. It re-uses most of the common stuff from audio graph driver and
>> uses the same DT binding. Required Tegra specific customizations are done
>> in the driver.
> [...]
>> + switch (srate) {
>> + case 11025:
>> + case 22050:
>> + case 44100:
>> + case 88200:
>> + case 176400:
>> + plla_out0_rate = chip_data->plla_out0_rates[x11_RATE];
>> + plla_rate = chip_data->plla_rates[x11_RATE];
>> + break;
>> + case 8000:
>> + case 16000:
>> + case 32000:
>> + case 48000:
>> + case 96000:
>> + case 192000:
> [...]
>
> Do you really need to enumerate the frequencies? Wouldn't just checking
> srate % 11025 be enough to divide the set in two? Or just calculating
> the PLLA base rate by multiplying?
This is quite common among other ASoC drivers from what I can see. The
PLL rate does not scale with the srate, we just use a different PLL rate
depending on if the srate is 11025 Hz or 8000 Hz based. I don't see any
need to change the above.
Cheers
Jon
--
nvpublic
next prev parent reply other threads:[~2020-10-01 19:44 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-01 17:32 [PATCH v3 00/13] Audio graph card updates and usage with Tegra210 audio Sameer Pujar
2020-10-01 17:32 ` [PATCH v3 01/13] ASoC: soc-core: Fix component name_prefix parsing Sameer Pujar
2020-10-01 18:53 ` Michał Mirosław
2020-10-02 8:50 ` Sameer Pujar
2020-10-01 17:32 ` [PATCH v3 02/13] ASoC: soc-pcm: Get all BEs along DAPM path Sameer Pujar
2020-10-01 17:32 ` [PATCH v3 03/13] ASoC: audio-graph: Use of_node and DAI for DPCM DAI link names Sameer Pujar
2020-10-01 17:32 ` [PATCH v3 04/13] ASoC: audio-graph: Identify 'no_pcm' DAI links for DPCM Sameer Pujar
2020-10-01 17:32 ` [PATCH v3 05/13] ASoC: audio-graph: Support empty Codec endpoint Sameer Pujar
2020-10-01 17:33 ` [PATCH v3 06/13] ASoC: simple-card-utils: Expose new members for asoc_simple_priv Sameer Pujar
2020-10-02 1:45 ` Kuninori Morimoto
2020-10-02 8:59 ` Sameer Pujar
2020-10-01 17:33 ` [PATCH v3 07/13] ASoC: audio-graph: Update driver as per new exposed members Sameer Pujar
2020-10-02 1:46 ` Kuninori Morimoto
2020-10-02 9:00 ` Sameer Pujar
2020-10-01 17:33 ` [PATCH v3 08/13] ASoC: audio-graph: Expose helpers from audio graph Sameer Pujar
2020-10-01 17:33 ` [PATCH v3 09/13] ASoC: dt-bindings: tegra: Add schema for audio graph card Sameer Pujar
2020-10-06 20:34 ` Rob Herring
2020-10-07 7:13 ` Sameer Pujar
2020-10-16 5:14 ` Sameer Pujar
2020-10-16 16:42 ` Mark Brown
2020-10-01 17:33 ` [PATCH v3 10/13] ASoC: tegra: Add audio graph based card driver Sameer Pujar
2020-10-01 19:07 ` Michał Mirosław
2020-10-01 19:44 ` Jon Hunter [this message]
2020-10-01 20:57 ` Dmitry Osipenko
2020-10-01 21:02 ` Dmitry Osipenko
2020-10-02 8:51 ` Sameer Pujar
2020-10-02 5:34 ` Kuninori Morimoto
2020-10-02 9:08 ` Sameer Pujar
2020-10-04 23:20 ` Kuninori Morimoto
2020-10-01 17:33 ` [PATCH v3 11/13] arm64: defconfig: Enable Tegra audio graph " Sameer Pujar
2020-10-01 17:33 ` [PATCH v3 12/13] arm64: tegra: Audio graph header for Tegra210 Sameer Pujar
2020-10-01 17:33 ` [PATCH v3 13/13] arm64: tegra: Audio graph sound card for Jetson Nano and TX1 Sameer Pujar
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