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

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Message-ID: <20220826082717.GB3151@tom-ThinkPad-T14s-Gen-2i>
Date:   Fri, 26 Aug 2022 10:27:17 +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

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

-- 
Tommaso Merciai
Embedded Linux Engineer
tommaso.merciai@...rulasolutions.com
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