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From:   Geert Uytterhoeven <geert@linux-m68k.org>
Date:   Mon, 25 Apr 2022 14:49:12 +0200
Message-ID: <CAMuHMdX4_PKsGGRj6yGhDGfaRD-6PqiJeCnKq0yUicfMutOP4g@mail.gmail.com>
Subject: Re: [PATCH 1/3] ASoC: sh: rz-ssi: Drop unused macros
To:     Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Cc:     Mark Brown <broonie@kernel.org>,
        Liam Girdwood <lgirdwood@gmail.com>,
        Jaroslav Kysela <perex@perex.cz>,
        Takashi Iwai <tiwai@suse.com>,
        ALSA Development Mailing List <alsa-devel@alsa-project.org>,
        Nobuhiro Iwamatsu <nobuhiro1.iwamatsu@toshiba.co.jp>,
        Pavel Machek <pavel@denx.de>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        Linux-Renesas <linux-renesas-soc@vger.kernel.org>,
        Prabhakar <prabhakar.csengg@gmail.com>,
        Biju Das <biju.das.jz@bp.renesas.com>
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Hi Prabhakar,

On Fri, Apr 22, 2022 at 7:32 PM Lad Prabhakar
<prabhakar.mahadev-lad.rj@bp.renesas.com> wrote:
> Drop unused macros SSIFSR_TDC and SSIFSR_RDC.
>
> Reported-by: Nobuhiro Iwamatsu <nobuhiro1.iwamatsu@toshiba.co.jp>
> Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>

Thanks for your patch!

What does this fix?
Is the real issue that there are 32 FIFO entries, and the TDC and RDC
fields are 6 bits wide, while the mask uses 0x1f instead of 0x3f?

> --- a/sound/soc/sh/rz-ssi.c
> +++ b/sound/soc/sh/rz-ssi.c
> @@ -59,9 +59,7 @@
>  #define SSIFSR_RDC_MASK                0x3f
>  #define SSIFSR_RDC_SHIFT       8
>
> -#define SSIFSR_TDC(x)          (((x) & 0x1f) << 24)
>  #define SSIFSR_TDE             BIT(16)
> -#define SSIFSR_RDC(x)          (((x) & 0x1f) << 8)
>  #define SSIFSR_RDF             BIT(0)
>
>  #define SSIOFR_LRCONT          BIT(8)

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds