linux-kernel - Re: [PATCH v2] drm/i915: Consistently use enum pipe for PCH transcoders

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Date:   Wed, 19 Jul 2017 09:49:59 -0700
From:   Matthias Kaehlcke <mka@...omium.org>
To:     Jani Nikula <jani.nikula@...ux.intel.com>,
        Daniel Vetter <daniel.vetter@...el.com>,
        intel-gfx <intel-gfx@...ts.freedesktop.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        dri-devel@...ts.freedesktop.org,
        Stéphane Marchesin <stephane.marchesin@...il.com>,
        Grant Grundler <grundler@...omium.org>
Subject: Re: [PATCH v2] drm/i915: Consistently use enum pipe for PCH
 transcoders

El Wed, Jul 19, 2017 at 08:30:36AM +0200 Daniel Vetter ha dit:

> On Tue, Jul 18, 2017 at 01:48:53PM -0700, Matthias Kaehlcke wrote:
> > Hi Daniel,
> > 
> > El Tue, Jul 18, 2017 at 08:39:50AM +0200 Daniel Vetter ha dit:
> > 
> > > On Mon, Jul 17, 2017 at 11:14:03AM -0700, Matthias Kaehlcke wrote:
> > > > The current code uses in some instances enum transcoder for PCH
> > > > transcoders and enum pipe in others. This is error prone and clang
> > > > raises warnings like this:
> > > > 
> > > > drivers/gpu/drm/i915/intel_dp.c:3546:51: warning: implicit conversion
> > > >   from enumeration type 'enum pipe' to different enumeration type
> > > >   'enum transcoder' [-Wenum-conversion]
> > > >     intel_set_pch_fifo_underrun_reporting(dev_priv, PIPE_A, false);
> > > > 
> > > > Consistently use the type enum pipe for PCH transcoders.
> > > > 
> > > > Signed-off-by: Matthias Kaehlcke <mka@...omium.org>
> > > 
> > > Somehow git apply-mbox could parse it, but manually applying using patch
> > > worked. Not sure what's going on, maybe double-check it's all right.
> > 
> > Not sure what happened, one of the patch fragments only has one '@'
> > instead of two, with that fixed the patch applies.
> > 
> > Unfortunately the manual application missed some fragments:
> > 
> > drivers/gpu/drm/i915/intel_display.c:5350:51: warning: implicit
> >   conversion from enumeration type 'enum transcoder' to different
> >   enumeration type 'enum pipe' [-Wenum-conversion]
> >                 intel_set_pch_fifo_underrun_reporting(dev_priv, TRANSCODER_A,
> >                 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~           ^~~~~~~~~~~~
> > drivers/gpu/drm/i915/intel_display.c:5436:51: warning: implicit
> >   conversion from enumeration type 'enum transcoder' to different
> >   enumeration type 'enum pipe' [-Wenum-conversion]
> >                 intel_set_pch_fifo_underrun_reporting(dev_priv, TRANSCODER_A,
> >                 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~           ^~~~~~~~~~~~
> > drivers/gpu/drm/i915/intel_display.c:5534:51: warning: implicit
> >   conversion from enumeration type 'enum transcoder' to different
> >   enumeration type 'enum pipe' [-Wenum-conversion]
> >                 intel_set_pch_fifo_underrun_reporting(dev_priv, TRANSCODER_A,
> >                 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~           ^~~~~~~~~~~~
> > drivers/gpu/drm/i915/intel_display.c:5563:51: warning: implicit
> >   conversion from enumeration type 'enum transcoder' to different
> >   enumeration type 'enum pipe' [-Wenum-conversion]
> >                 intel_set_pch_fifo_underrun_reporting(dev_priv, TRANSCODER_A,
> > 
> > 
> > What would be the best way forward from here? Revert the manual
> > application and apply again, or a fixup patch?
> 
> Drat I screwed up :-( drm-intel-next-queued is non-rebasing, that means I
> need a fixup patch. I should have checked more carefully that I have all
> the hunks, but patch -p1 seemed happy ...

Ok, I will send a fixup patch shortly

Matthias