linux-kernel - Re: [PATCH] drm/amd/display: fix compilation error

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Date:   Thu, 13 Jun 2019 14:52:34 -0400
From:   Alex Deucher <alexdeucher@...il.com>
To:     Sam Ravnborg <sam@...nborg.org>
Cc:     Hariprasad Kelam <hariprasad.kelam@...il.com>,
        LKML <linux-kernel@...r.kernel.org>,
        Yongqiang Sun <yongqiang.sun@....com>,
        Charlene Liu <charlene.liu@....com>,
        Leo Li <sunpeng.li@....com>,
        Bhawanpreet Lakha <Bhawanpreet.Lakha@....com>,
        Gloria Li <geling.li@....com>,
        amd-gfx list <amd-gfx@...ts.freedesktop.org>,
        Nicholas Kazlauskas <nicholas.kazlauskas@....com>,
        David Airlie <airlied@...ux.ie>,
        Dmytro Laktyushkin <Dmytro.Laktyushkin@....com>,
        Tony Cheng <tony.cheng@....com>,
        Maling list - DRI developers 
        <dri-devel@...ts.freedesktop.org>,
        Alex Deucher <alexander.deucher@....com>,
        Christian König <christian.koenig@....com>,
        Anthony Koo <Anthony.Koo@....com>
Subject: Re: [PATCH] drm/amd/display: fix compilation error

On Thu, Jun 13, 2019 at 2:42 PM Sam Ravnborg <sam@...nborg.org> wrote:
>
> Hi Alex.
>
> On Wed, Jun 12, 2019 at 10:35:26PM -0400, Alex Deucher wrote:
> > On Wed, Jun 12, 2019 at 10:34 PM Hariprasad Kelam
> > <hariprasad.kelam@...il.com> wrote:
> > >
> > > this patch fixes below compilation error
> > >
> > > drivers/gpu/drm/amd/amdgpu/../display/dc/dcn10/dcn10_hw_sequencer.c: In
> > > function ‘dcn10_apply_ctx_for_surface’:
> > > drivers/gpu/drm/amd/amdgpu/../display/dc/dcn10/dcn10_hw_sequencer.c:2378:3:
> > > error: implicit declaration of function ‘udelay’
> > > [-Werror=implicit-function-declaration]
> > >    udelay(underflow_check_delay_us);
> > >
> > > Signed-off-by: Hariprasad Kelam <hariprasad.kelam@...il.com>
>
> Am I right in assuming you took this patch?
>
> I expect that new code using udelay was added to the amd tree,
> and when merged with drm-misc-next it failed, because drm-misc-next no
> longer had drmP.h included so no implicit include of delay.h
>
> The root cause was that my original patchset should have been based
> on the amd tree, and applied there :-(

No worries.  I've picked it up.

Alex