linux-kernel - Re: [PATCH v2 2/7] ASoC: mediatek: mt7986: support audio clock control

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Date:   Wed, 5 Jul 2023 07:52:51 +0000
From:   Maso Huang (黃加竹) 
        <Maso.Huang@...iatek.com>
To:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "robh+dt@...nel.org" <robh+dt@...nel.org>,
        "linux-mediatek@...ts.infradead.org" 
        <linux-mediatek@...ts.infradead.org>,
        Trevor Wu (吳文良) <Trevor.Wu@...iatek.com>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        Allen-KH Cheng (程冠勳) 
        <Allen-KH.Cheng@...iatek.com>,
        "broonie@...nel.org" <broonie@...nel.org>,
        "renzhijie2@...wei.com" <renzhijie2@...wei.com>,
        "conor+dt@...nel.org" <conor+dt@...nel.org>,
        "tiwai@...e.com" <tiwai@...e.com>,
        "lgirdwood@...il.com" <lgirdwood@...il.com>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "krzysztof.kozlowski+dt@...aro.org" 
        <krzysztof.kozlowski+dt@...aro.org>,
        "matthias.bgg@...il.com" <matthias.bgg@...il.com>,
        "perex@...ex.cz" <perex@...ex.cz>,
        Jiaxin Yu (俞家鑫) <Jiaxin.Yu@...iatek.com>,
        "angelogioacchino.delregno@...labora.com" 
        <angelogioacchino.delregno@...labora.com>,
        "alsa-devel@...a-project.org" <alsa-devel@...a-project.org>
Subject: Re: [PATCH v2 2/7] ASoC: mediatek: mt7986: support audio clock
 control

On Tue, 2023-07-04 at 10:53 +0200, AngeloGioacchino Del Regno wrote:
>  	 
> External email : Please do not click links or open attachments until
> you have verified the sender or the content.
>  Il 26/06/23 04:34, Maso Huang ha scritto:
> > Add audio clock wrapper and audio tuner control.
> > 
> > Signed-off-by: Maso Huang <maso.huang@...iatek.com>
> > ---
> >   sound/soc/mediatek/mt7986/mt7986-afe-clk.c | 75
> ++++++++++++++++++++++
> >   sound/soc/mediatek/mt7986/mt7986-afe-clk.h | 18 ++++++
> >   2 files changed, 93 insertions(+)
> >   create mode 100644 sound/soc/mediatek/mt7986/mt7986-afe-clk.c
> >   create mode 100644 sound/soc/mediatek/mt7986/mt7986-afe-clk.h
> > 
> > diff --git a/sound/soc/mediatek/mt7986/mt7986-afe-clk.c
> b/sound/soc/mediatek/mt7986/mt7986-afe-clk.c
> > new file mode 100644
> > index 000000000000..a8b5fae05673
> > --- /dev/null
> > +++ b/sound/soc/mediatek/mt7986/mt7986-afe-clk.c
> > @@ -0,0 +1,75 @@
> > +// SPDX-License-Identifier: GPL-2.0
> > +/*
> > + * mt7986-afe-clk.c  --  MediaTek 7986 afe clock ctrl
> > + *
> > + * Copyright (c) 2021 MediaTek Inc.
> > + * Author: Vic Wu <vic.wu@...iatek.com>
> > + *         Maso Huang <maso.huang@...iatek.com>
> > + */
> > +
> > +#include <linux/clk.h>
> > +
> > +#include "mt7986-afe-common.h"
> > +#include "mt7986-afe-clk.h"
> > +#include "mt7986-reg.h"
> > +
> > +enum {
> > +CK_INFRA_AUD_BUS_CK = 0,
> > +CK_INFRA_AUD_26M_CK,
> > +CK_INFRA_AUD_L_CK,
> > +CK_INFRA_AUD_AUD_CK,
> > +CK_INFRA_AUD_EG2_CK,
> > +CLK_NUM
> > +};
> > +
> > +static const char *aud_clks[CLK_NUM] = {
> > +[CK_INFRA_AUD_BUS_CK] = "aud_bus_ck",
> > +[CK_INFRA_AUD_26M_CK] = "aud_26m_ck",
> > +[CK_INFRA_AUD_L_CK] = "aud_l_ck",
> > +[CK_INFRA_AUD_AUD_CK] = "aud_aud_ck",
> > +[CK_INFRA_AUD_EG2_CK] = "aud_eg2_ck",
> > +};
> > +
> > +int mt7986_init_clock(struct mtk_base_afe *afe)
> > +{
> > +struct mt7986_afe_private *afe_priv = afe->platform_priv;
> > +int ret, i;
> > +
> > +afe_priv->clks = devm_kcalloc(afe->dev, CLK_NUM,
> > +sizeof(*afe_priv->clks), GFP_KERNEL);
> > +if (!afe_priv->clks)
> > +return -ENOMEM;
> > +afe_priv->num_clks = CLK_NUM;
> > +
> > +for (i = 0; i < afe_priv->num_clks; i++)
> > +afe_priv->clks[i].id = aud_clks[i];
> > +
> > +ret = devm_clk_bulk_get(afe->dev, afe_priv->num_clks, afe_priv-
> >clks);
> > +if (ret)
> > +return dev_err_probe(afe->dev, ret, "Failed to get clocks\n");
> > +
> > +return 0;
> > +}
> > +
> > +int mt7986_afe_enable_clock(struct mtk_base_afe *afe)
> > +{
> > +struct mt7986_afe_private *afe_priv = afe->platform_priv;
> > +int ret;
> > +
> > +ret = clk_bulk_prepare_enable(afe_priv->num_clks, afe_priv->clks);
> 
> You don't need a wrapper function for just a single
> clk_bulk_prepare_enable() call.
> 

OK, I'll use clk_bulk_prepare_enable directly.

> > +if (ret)
> > +return dev_err_probe(afe->dev, ret, "Failed to enable clocks\n");
> > +
> > +return 0;
> > +}
> > +EXPORT_SYMBOL_GPL(mt7986_afe_enable_clock);
> > +
> > +int mt7986_afe_disable_clock(struct mtk_base_afe *afe)
> > +{
> > +struct mt7986_afe_private *afe_priv = afe->platform_priv;
> > +
> > +clk_bulk_disable_unprepare(afe_priv->num_clks, afe_priv->clks);
> 
> Same for this one....
> 

OK.

> ... which means that this file will have only mt7986_init_clock() so,
> ultimately,
> you don't need a mt7986-afe-clk.c file at all.
> Please merge this logic into mt7986-afe-pcm.c, which is also the only
> user of it.
> 
> Thanks,
> Angelo
> 

Hi Angelo,

Thanks for your review.
I'll remove mt7986-afe-clk.c and merge related clock api to mt7986-afe-
pcm.c in v3 patch.

Best regards,
Maso