linux-kernel - Re: [PATCH] media: imx: remove code for non-existing config IMX_GPT

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Message-ID: <CAKXUXMx81Mvo_H4KzkHXgPbYq07SbEuTcs9LBae5D5GRTK_T0Q@mail.gmail.com>
Date:   Wed, 23 Nov 2022 09:24:42 +0100
From:   Lukas Bulwahn <lukas.bulwahn@...il.com>
To:     Tommaso Merciai <tommaso.merciai@...rulasolutions.com>
Cc:     Steve Longerbeam <slongerbeam@...il.com>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Shawn Guo <shawnguo@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Fabio Estevam <festevam@...il.com>,
        NXP Linux Team <linux-imx@....com>,
        linux-media@...r.kernel.org, linux-staging@...ts.linux.dev,
        linux-arm-kernel@...ts.infradead.org,
        kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] media: imx: remove code for non-existing config IMX_GPT_ICAP

On Wed, Nov 23, 2022 at 9:21 AM Tommaso Merciai
<tommaso.merciai@...rulasolutions.com> wrote:
>
> Hi Lukas,
>
> On Wed, Nov 23, 2022 at 08:56:06AM +0100, Lukas Bulwahn wrote:
> > On Tue, Nov 22, 2022 at 5:09 PM Tommaso Merciai
> > <tommaso.merciai@...rulasolutions.com> wrote:
> > >
> > > Hi Lukas,
> > >
> > > On Tue, Nov 22, 2022 at 02:23:30PM +0100, Lukas Bulwahn wrote:
> > > > There never was a config IMX_GPT_ICAP in the repository. So remove the code
> > > > conditional on this config and simplify the callers that just called empty
> > > > functions.
> > > >
> > > > Signed-off-by: Lukas Bulwahn <lukas.bulwahn@...il.com>
> > > > ---
> > > >  drivers/staging/media/imx/imx-media-fim.c | 54 -----------------------
> > > >  1 file changed, 54 deletions(-)
> > > >
> > > > diff --git a/drivers/staging/media/imx/imx-media-fim.c b/drivers/staging/media/imx/imx-media-fim.c
> > > > index 3a9182933508..19a48eb445fd 100644
> > > > --- a/drivers/staging/media/imx/imx-media-fim.c
> > > > +++ b/drivers/staging/media/imx/imx-media-fim.c
> > > > @@ -187,54 +187,6 @@ static void frame_interval_monitor(struct imx_media_fim *fim,
> > > >               send_fim_event(fim, error_avg);
> > > >  }
> > > >
> > > > -#ifdef CONFIG_IMX_GPT_ICAP
> > > > -/*
> > > > - * Input Capture method of measuring frame intervals. Not subject
> > > > - * to interrupt latency.
> > > > - */
> > > > -static void fim_input_capture_handler(int channel, void *dev_id,
> > > > -                                   ktime_t timestamp)
> > > > -{
> > > > -     struct imx_media_fim *fim = dev_id;
> > > > -     unsigned long flags;
> > > > -
> > > > -     spin_lock_irqsave(&fim->lock, flags);
> > > > -
> > > > -     frame_interval_monitor(fim, timestamp);
> > > > -
> > > > -     if (!completion_done(&fim->icap_first_event))
> > > > -             complete(&fim->icap_first_event);
> > > > -
> > > > -     spin_unlock_irqrestore(&fim->lock, flags);
> > > > -}
> > > > -
> > > > -static int fim_request_input_capture(struct imx_media_fim *fim)
> > > > -{
> > > > -     init_completion(&fim->icap_first_event);
> > > > -
> > > > -     return mxc_request_input_capture(fim->icap_channel,
> > > > -                                      fim_input_capture_handler,
> > > > -                                      fim->icap_flags, fim);
> > > > -}
> > > > -
> > > > -static void fim_free_input_capture(struct imx_media_fim *fim)
> > > > -{
> > > > -     mxc_free_input_capture(fim->icap_channel, fim);
> > > > -}
> > > > -
> > > > -#else /* CONFIG_IMX_GPT_ICAP */
> > > > -
> > > > -static int fim_request_input_capture(struct imx_media_fim *fim)
> > > > -{
> > > > -     return 0;
> > > > -}
> > > > -
> > > > -static void fim_free_input_capture(struct imx_media_fim *fim)
> > > > -{
> > > > -}
> > > > -
> > > > -#endif /* CONFIG_IMX_GPT_ICAP */
> > > > -
> > > >  /*
> > > >   * In case we are monitoring the first frame interval after streamon
> > > >   * (when fim->num_skip = 0), we need a valid fim->last_ts before we
> > > > @@ -435,14 +387,8 @@ int imx_media_fim_set_stream(struct imx_media_fim *fim,
> > > >               spin_unlock_irqrestore(&fim->lock, flags);
> > > >
> > > >               if (icap_enabled(fim)) {
> > > > -                     ret = fim_request_input_capture(fim);
> > > > -                     if (ret)
> > > > -                             goto out;
> > > >                       fim_acquire_first_ts(fim);
> > > >               }
> > >
> > > As suggested by the checkpatch.pl:
> > > WARNING: braces {} are not necessary for single statement blocks
> > >
> > > > -     } else {
> > > > -             if (icap_enabled(fim))
> > > > -                     fim_free_input_capture(fim);
> > > >       }
> > > >
> > > >       fim->stream_on = on;
> > > > --
> > > > 2.17.1
> > > >
> > >
> >
> > Strangely, my checkpatch invocation on next-20221116 did not show that
> > warning and I am unaware that I made any specific changes to
> > checkpatch or its configuration.
> >
> > Anyway, checkpatch and you, Tommaso, are right and the patch can of
> > course be improved. I sent out a patch v2:
> >
> > https://lore.kernel.org/all/20221123075216.28193-1-lukas.bulwahn@gmail.com/
> >
> > I hope to get an Acked-by: tag from you now. Thanks.
>
> Sorry I miss the tag :)
>
> Acked-by: Tommaso Merciai <tommaso.merciai@...rulasolutions.com>
>
> Apply the patch then run:
>  scripts/checkpatch.pl -f drivers/staging/media/imx/imx-media-fim.c
>

I see. I usually just run checkpatch.pl on the patch, but do not apply
the patch and run checkpatch on the file. That explains the difference
of observations. Good to know.

Lukas

> Regards,
> Tommaso
>
> >
> > Lukas
> >
> > > Apart of this, patch looks good to me.
> > > Thanks.
> > >
> > > Regards,
> > > Tommaso
> > >
> > > --
> > > Tommaso Merciai
> > > Embedded Linux Engineer
> > > tommaso.merciai@...rulasolutions.com
> > > __________________________________
> > >
> > > Amarula Solutions SRL
> > > Via Le Canevare 30, 31100 Treviso, Veneto, IT
> > > T. +39 042 243 5310
> > > info@...rulasolutions.com
> > > www.amarulasolutions.com
>
> --
> Tommaso Merciai
> Embedded Linux Engineer
> tommaso.merciai@...rulasolutions.com
> __________________________________
>
> Amarula Solutions SRL
> Via Le Canevare 30, 31100 Treviso, Veneto, IT
> T. +39 042 243 5310
> info@...rulasolutions.com
> www.amarulasolutions.com