linux-kernel - Re: [PATCH v10] staging: fbtft: add tearing signal detect

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Message-ID: <20210127144946.GF2696@kadam>
Date:   Wed, 27 Jan 2021 17:49:46 +0300
From:   Dan Carpenter <dan.carpenter@...cle.com>
To:     Greg KH <gregkh@...uxfoundation.org>
Cc:     carlis <zhangxuezhi3@...il.com>,
        Andy Whitcroft <apw@...onical.com>,
        Joe Perches <joe@...ches.com>, devel@...verdev.osuosl.org,
        linux-fbdev@...r.kernel.org, mh12gx2825@...il.com,
        oliver.graute@...oconnector.com, linux-kernel@...r.kernel.org,
        dri-devel@...ts.freedesktop.org, sbrivio@...hat.com,
        colin.king@...onical.com, zhangxuezhi1@...ong.com
Subject: Re: [PATCH v10] staging: fbtft: add tearing signal detect

On Wed, Jan 27, 2021 at 03:25:20PM +0100, Greg KH wrote:
> On Wed, Jan 27, 2021 at 10:17:08PM +0800, carlis wrote:
> > On Wed, 27 Jan 2021 15:13:05 +0100
> > Greg KH <gregkh@...uxfoundation.org> wrote:
> > 
> > > On Wed, Jan 27, 2021 at 10:08:09PM +0800, carlis wrote:
> > > > On Wed, 27 Jan 2021 14:51:55 +0100
> > > > Greg KH <gregkh@...uxfoundation.org> wrote:
> > > >   
> > > > > On Wed, Jan 27, 2021 at 09:42:52PM +0800, Carlis wrote:  
> > > > > > From: zhangxuezhi <zhangxuezhi1@...ong.com>
> > > > > > 
> > > > > > For st7789v ic,when we need continuous full screen refresh, it
> > > > > > is best to wait for the TE signal arrive to avoid screen tearing
> > > > > > 
> > > > > > Signed-off-by: zhangxuezhi <zhangxuezhi1@...ong.com>    
> > > > > 
> > > > > Please slow down and wait at least a day between patch
> > > > > submissions, there is no rush here.
> > > > > 
> > > > > And also, ALWAYS run scripts/checkpatch.pl on your submissions, so
> > > > > that you don't have a maintainer asking you about basic problems,
> > > > > like are in this current patch :(
> > > > > 
> > > > > thanks,
> > > > > 
> > > > > greg k-h  
> > > > 
> > > > hi,
> > > >   This is my first patch contribution to Linux, so some of the rules
> > > > are not very clear .In addition, I can confirm that before sending
> > > > patch, I check it with checkPatch.py every time.Thank you very much
> > > > for your help  
> > > 
> > > Please read Documentation/SubmittingPatches which has a link to the
> > > checklist and other documentation you should read.
> > > 
> > > And I doubt you are running checkpatch on your submission, as there is
> > > obvious coding style issues in it.  If so, please provide the output
> > > as it must be broken :(
> > > 
> > > thanks,
> > > 
> > > greg k-h
> > hi, the patch v11 checkpatch.pl output is below:
> > 
> > carlis@...rmsz-10:~/work/linux-kernel/linux$ ./scripts/checkpatch.pl
> > 0001-staging-fbtft-add-tearing-signal-detect.patch total: 0 errors, 0
> > warnings, 0 checks, 176 lines checked
> > 
> > 0001-staging-fbtft-add-tearing-signal-detect.patch has no obvious style
> > problems and is ready for submission.
> 
> Wow, my apologies!
> 
> Andy and Joe, there's something wrong here that is missing the fact that
> a line is being indented with spaces and not tabs in the patch
> at https://lore.kernel.org/r/1611754972-151016-1-git-send-email-zhangxuezhi3@gmail.com
> 
> Any ideas what broke?
> 

    /*Tearing Effect Line On*/

Comments are the exception to the "no spaces at the start of a line"
rule.  I was expecting that the kbuild-bot would send a Smatch warning
for inconsistent indenting, but comments are not counted there either.

I'm sort of surprised that we don't have checkpatch rule about the
missing space characters.  It should be: "/* Tearing Effect Line On */".

regards,
dan carpenter