linux-kernel - Re: [EXT] Re: [PATCH v5 2/4] media: amphion: tell and handle contiguous and non contiguous format

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Date:   Fri, 26 Aug 2022 10:34:08 +0200
From:   Tommaso Merciai <tommaso.merciai@...rulasolutions.com>
To:     Ming Qian <ming.qian@....com>
Cc:     "mchehab@...nel.org" <mchehab@...nel.org>,
        "hverkuil-cisco@...all.nl" <hverkuil-cisco@...all.nl>,
        "shawnguo@...nel.org" <shawnguo@...nel.org>,
        "robh+dt@...nel.org" <robh+dt@...nel.org>,
        "s.hauer@...gutronix.de" <s.hauer@...gutronix.de>,
        "kernel@...gutronix.de" <kernel@...gutronix.de>,
        "festevam@...il.com" <festevam@...il.com>,
        dl-linux-imx <linux-imx@....com>,
        "X.H. Bao" <xiahong.bao@....com>,
        "linux-media@...r.kernel.org" <linux-media@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [EXT] Re: [PATCH v5 2/4] media: amphion: tell and handle
 contiguous and non contiguous format

On Fri, Aug 26, 2022 at 10:27:17AM +0200, Tommaso Merciai wrote:
> Hi Ming,
> 
> On Fri, Aug 26, 2022 at 07:47:47AM +0000, Ming Qian wrote:
> > [snip]
> > 
> > >> diff --git a/drivers/media/platform/amphion/vpu_helpers.c
> > >> b/drivers/media/platform/amphion/vpu_helpers.c
> > >> index e9aeb3453dfc..019c77e84514 100644
> > >> --- a/drivers/media/platform/amphion/vpu_helpers.c
> > >> +++ b/drivers/media/platform/amphion/vpu_helpers.c
> > >> @@ -59,6 +59,36 @@ const struct vpu_format
> > >*vpu_helper_find_format(struct vpu_inst *inst, u32 type,
> > >>       return NULL;
> > >>  }
> > >>
> > >> +const struct vpu_format *vpu_helper_find_sibling(struct vpu_inst
> > >> +*inst, u32 type, u32 pixelfmt) {
> > >> +     const struct vpu_format *fmt;
> > >> +     const struct vpu_format *sibling;
> > >> +
> > >> +     fmt = vpu_helper_find_format(inst, type, pixelfmt);
> > >> +     if (!fmt || !fmt->sibling)
> > >> +             return NULL;
> > >> +
> > >> +     sibling = vpu_helper_find_format(inst, type, fmt->sibling);
> > >> +     if (!sibling || sibling->sibling != fmt->pixfmt ||
> > >> +         sibling->comp_planes != fmt->comp_planes)
> > >> +             return NULL;
> > >
> > >I think to preserve code style you need the following solutions on this if
> > >statement:
> > >
> > >if (!sibling || (sibling->sibling != fmt->pixfmt) ||
> > >    (sibling->comp_planes != fmt->comp_planes))
> > >         return NULL;
> > >
> > >I think I have suggested to you this solution on the v4. But never mind we
> > >need this :)
> > >
> > >Thanks
> > >
> > 
> > Hi Tommaso,
> >     The parentheses are unnecessary, the checkpatch.pl will report the following style problems if I add the parentheses:
> > 
> > CHECK: Unnecessary parentheses around 'sibling->sibling != fmt->pixfmt'
> > #11: FILE: drivers/media/platform/amphion/vpu_helpers.c:72:
> > +       if (!sibling || (sibling->sibling != fmt->pixfmt) ||
> > +           (sibling->comp_planes != fmt->comp_planes))
> > 
> > CHECK: Unnecessary parentheses around 'sibling->comp_planes != fmt->comp_planes'
> > #11: FILE: drivers/media/platform/amphion/vpu_helpers.c:72:
> > +       if (!sibling || (sibling->sibling != fmt->pixfmt) ||
> > +           (sibling->comp_planes != fmt->comp_planes))
> > 
> > total: 0 errors, 0 warnings, 2 checks, 10 lines checked
> > 
> > NOTE: For some of the reported defects, checkpatch may be able to
> >       mechanically convert to the typical style using --fix or --fix-inplace.
> > 
> > 1.patch has style problems, please review.
> > 
> > NOTE: If any of the errors are false positives, please report
> >       them to the maintainer, see CHECKPATCH in MAINTAINERS.
> 
> Sorry, my bad. I don't check this using checkpatch.pl, but checking the
> others driver code, you are right. Thanks for clarify this.
> 
> Then, Looks good to me.
> 
> Regards,
> Tommaso

Forgot the tag:

Reviewed-by: Tommaso Merciai <tommaso.merciai@...rulasolutions.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

-- 
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