linux-kernel - Re: build failure of next-20220906 due to 396369d67549 ("drm: vkms: Add support to the RGB565 format")

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Date:   Fri, 9 Sep 2022 10:43:17 -0100
From:   Melissa Wen <mwen@...lia.com>
To:     Sudip Mukherjee <sudipm.mukherjee@...il.com>
Cc:     Igor Torrente <igormtorrente@...il.com>,
        Melissa Wen <melissa.srw@...il.com>,
        Haneen Mohammed <hamohammed.sa@...il.com>,
        Rodrigo Siqueira <rodrigosiqueiramelo@...il.com>,
        David Airlie <airlied@...ux.ie>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        dri-devel <dri-devel@...ts.freedesktop.org>,
        linux-next <linux-next@...r.kernel.org>
Subject: Re: build failure of next-20220906 due to 396369d67549 ("drm: vkms:
 Add support to the RGB565 format")

On 09/07, Sudip Mukherjee wrote:
> On Wed, Sep 7, 2022 at 8:23 PM Melissa Wen <mwen@...lia.com> wrote:
> >
> > On 09/07, Sudip Mukherjee wrote:
> > > Hi Melissa,
> > >
> > > On Wed, Sep 7, 2022 at 6:05 PM Melissa Wen <mwen@...lia.com> wrote:
> > > >
> > > > On 09/06, Sudip Mukherjee wrote:
> > > > > On Tue, Sep 6, 2022 at 4:59 PM Sudip Mukherjee (Codethink)
> > > > > <sudipm.mukherjee@...il.com> wrote:
> > > > > >
> > > > > > Hi All,
> > > > > >
> > > > > > The builds of next-20220906 fails for mips, xtensa and arm allmodconfig.
> > > > > >
> > > > > > The errors in mips and xtensa are:
> > > > > >
> > > > > > ERROR: modpost: "__divdi3" [drivers/gpu/drm/vkms/vkms.ko] undefined!
> > > > > > ERROR: modpost: "__udivdi3" [drivers/gpu/drm/vkms/vkms.ko] undefined!
> > > > > >
> > > > > > The error in arm is:
> > > > > >
> > > > > > ERROR: modpost: "__aeabi_uldivmod" [drivers/gpu/drm/vkms/vkms.ko] undefined!
> > > > > > ERROR: modpost: "__aeabi_ldivmod" [drivers/gpu/drm/vkms/vkms.ko] undefined!
> > > > > >
> > > > > >
> > > > > > Trying to do a git bisect to find out the offending commit.
> > > > >
> > > > > git bisect points to 396369d67549 ("drm: vkms: Add support to the
> > > > > RGB565 format")
> > > >
> > > > Hi Sudip,
> > > >
> > > > Thanks for pointing out this issue.
> > > >
> > > > I think we can replace the macros that are triggering those compilation
> > > > error by functions in drm/drm_fixed.h that do the same calculation.
> > > >
> > > > I checked those errors when building for arm and i386 and the issues are
> > > > fixed after applying the patch below. I appreciate if you can test.
> > >
> > > Sorry, could not test as the downloaded mbox is saying patch is
> > > corrupted and could not be applied. Can you please attach the patch or
> > > maybe send using git send-email.
> >
> > Sorry, my bad. It's attached. Let me know if goes smoothly.
> 
> Thanks. That was perfect.
> And with that I can confirm I don't see the failure on mips and arm.
> Not tested on xtensa but should be fixed there also.
> 
> Tested-by: Sudip Mukherjee <sudipm.mukherjee@...il.com>

Thanks for testing it.

Melissa
> 
> 
> -- 
> Regards
> Sudip

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