linux-kernel - Re: [PATCH 1/3] ASoC: sh: rz-ssi: Drop unused macros

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Date:   Mon, 25 Apr 2022 17:09:23 +0100
From:   "Lad, Prabhakar" <prabhakar.csengg@...il.com>
To:     Geert Uytterhoeven <geert@...ux-m68k.org>
Cc:     Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>,
        Mark Brown <broonie@...nel.org>,
        Liam Girdwood <lgirdwood@...il.com>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>,
        ALSA Development Mailing List <alsa-devel@...a-project.org>,
        Nobuhiro Iwamatsu <nobuhiro1.iwamatsu@...hiba.co.jp>,
        Pavel Machek <pavel@...x.de>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux-Renesas <linux-renesas-soc@...r.kernel.org>,
        Biju Das <biju.das.jz@...renesas.com>
Subject: Re: [PATCH 1/3] ASoC: sh: rz-ssi: Drop unused macros

Hi Geert,

Thank you for the review.

On Mon, Apr 25, 2022 at 1:49 PM Geert Uytterhoeven <geert@...ux-m68k.org> wrote:
>
> Hi Prabhakar,
>
> On Fri, Apr 22, 2022 at 7:32 PM Lad Prabhakar
> <prabhakar.mahadev-lad.rj@...renesas.com> wrote:
> > Drop unused macros SSIFSR_TDC and SSIFSR_RDC.
> >
> > Reported-by: Nobuhiro Iwamatsu <nobuhiro1.iwamatsu@...hiba.co.jp>
> > Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@...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?
>
I was in two minds here as you have already spotted the masks are
incorrect, instead of fixing the masks I choose to drop the macros
itself as they were not used. Let me know what are your thoughts on
this.

Cheers,
Prabhakar

> > --- 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@...ux-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