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 07:47:47 +0000
From:   Ming Qian <ming.qian@....com>
To:     Tommaso Merciai <tommaso.merciai@...rulasolutions.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

[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.