linux-kernel - Re: [PATCH v2 1/7] ASoC: mediatek: mt7986: add common header

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Date:   Tue, 4 Jul 2023 11:01:09 +0200
From:   AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>
To:     Maso Huang <maso.huang@...iatek.com>,
        Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>,
        Trevor Wu <trevor.wu@...iatek.com>,
        Jiaxin Yu <jiaxin.yu@...iatek.com>,
        Ren Zhijie <renzhijie2@...wei.com>,
        Allen-KH Cheng <allen-kh.cheng@...iatek.com>,
        alsa-devel@...a-project.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org
Subject: Re: [PATCH v2 1/7] ASoC: mediatek: mt7986: add common header

Il 26/06/23 04:34, Maso Huang ha scritto:
> Add header files for register definition and structure.
> 
> Signed-off-by: Maso Huang <maso.huang@...iatek.com>
> ---
>   sound/soc/mediatek/mt7986/mt7986-afe-common.h |  51 +++++
>   sound/soc/mediatek/mt7986/mt7986-reg.h        | 206 ++++++++++++++++++
>   2 files changed, 257 insertions(+)
>   create mode 100644 sound/soc/mediatek/mt7986/mt7986-afe-common.h
>   create mode 100644 sound/soc/mediatek/mt7986/mt7986-reg.h
> 
> diff --git a/sound/soc/mediatek/mt7986/mt7986-afe-common.h b/sound/soc/mediatek/mt7986/mt7986-afe-common.h
> new file mode 100644
> index 000000000000..646e1be4fdce
> --- /dev/null
> +++ b/sound/soc/mediatek/mt7986/mt7986-afe-common.h
> @@ -0,0 +1,51 @@
> +/* SPDX-License-Identifier: GPL-2.0 */
> +/*
> + * mt7986-afe-common.h  --  MediaTek 7986 audio driver definitions
> + *
> + * Copyright (c) 2021 MediaTek Inc.
> + * Author: Vic Wu <vic.wu@...iatek.com>
> + *         Maso Huang <maso.huang@...iatek.com>
> + */
> +
> +#ifndef _MT_7986_AFE_COMMON_H_
> +#define _MT_7986_AFE_COMMON_H_
> +
> +#include <sound/soc.h>
> +#include <linux/clk.h>
> +#include <linux/list.h>
> +#include <linux/regmap.h>
> +#include "../common/mtk-base-afe.h"
> +
> +enum {
> +	MT7986_MEMIF_DL1,
> +	MT7986_MEMIF_VUL12,
> +	MT7986_MEMIF_NUM,
> +	MT7986_DAI_ETDM = MT7986_MEMIF_NUM,
> +	MT7986_DAI_NUM,
> +};
> +
> +enum {
> +	MT7986_IRQ_0,
> +	MT7986_IRQ_1,
> +	MT7986_IRQ_2,
> +	MT7986_IRQ_NUM,
> +};
> +
> +struct clk;
> +
> +struct mt7986_afe_private {
> +	struct clk_bulk_data *clks;
> +	int num_clks;
> +
> +	int pm_runtime_bypass_reg_ctl;
> +
> +	/* dai */
> +	void *dai_priv[MT7986_DAI_NUM];
> +};
> +
> +unsigned int mt7986_afe_rate_transform(struct device *dev,
> +				       unsigned int rate);
> +
> +/* dai register */
> +int mt7986_dai_etdm_register(struct mtk_base_afe *afe);
> +#endif
> diff --git a/sound/soc/mediatek/mt7986/mt7986-reg.h b/sound/soc/mediatek/mt7986/mt7986-reg.h
> new file mode 100644
> index 000000000000..6433cdf3da92
> --- /dev/null
> +++ b/sound/soc/mediatek/mt7986/mt7986-reg.h
> @@ -0,0 +1,206 @@
> +/* SPDX-License-Identifier: GPL-2.0 */
> +/*
> + * mt7986-reg.h  --  MediaTek 7986 audio driver reg definition
> + *
> + * Copyright (c) 2021 MediaTek Inc.
> + * Author: Vic Wu <vic.wu@...iatek.com>
> + *         Maso Huang <maso.huang@...iatek.com>
> + */
> +
> +#ifndef _MT7986_REG_H_
> +#define _MT7986_REG_H_

..snip..

> +/* ETDM_OUT5_CON4 */
> +#define OUT_RELATCH(x)                  ((x) << 24)
> +#define OUT_RELATCH_SFT                 24
> +#define OUT_RELATCH_MASK                GENMASK(28, 24)
> +#define OUT_CLK_SRC(x)                  ((x) << 6)
> +#define OUT_CLK_SRC_SFT                 6
> +#define OUT_CLK_SRC_MASK                GENMASK(8, 6)
> +#define OUT_SEL_FS(x)                   ((x) << 0)

A number shifted by zero bits is equal to itself, so, this statement doesn't
make sense. I understand why you want a OUT_SEL_FS(x) definition though, so
you could do it like:

#define OUT_SEL_FS(x)			(x)

After which,
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>

Regards,
Angelo