linux-kernel - Re: [PATCH v5 1/6] drm: panfrost: add optional bus

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Date:   Fri, 17 May 2019 17:16:49 -0500
From:   Rob Herring <robh+dt@...nel.org>
To:     Clément Péron <peron.clem@...il.com>
Cc:     David Airlie <airlied@...ux.ie>, Daniel Vetter <daniel@...ll.ch>,
        Mark Rutland <mark.rutland@....com>,
        Maxime Ripard <maxime.ripard@...tlin.com>,
        Chen-Yu Tsai <wens@...e.org>,
        Tomeu Vizoso <tomeu.vizoso@...labora.com>,
        Will Deacon <will.deacon@....com>,
        Robin Murphy <robin.murphy@....com>,
        Joerg Roedel <joro@...tes.org>,
        Neil Armstrong <narmstrong@...libre.com>,
        Steven Price <steven.price@....com>,
        dri-devel <dri-devel@...ts.freedesktop.org>,
        devicetree <devicetree@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "moderated list:ARM/FREESCALE IMX / MXC ARM ARCHITECTURE" 
        <linux-arm-kernel@...ts.infradead.org>,
        Linux IOMMU <iommu@...ts.linux-foundation.org>
Subject: Re: [PATCH v5 1/6] drm: panfrost: add optional bus_clock

On Fri, May 17, 2019 at 5:08 PM Clément Péron <peron.clem@...il.com> wrote:
>
> Hi Rob,
>
> On Fri, 17 May 2019 at 22:07, Rob Herring <robh+dt@...nel.org> wrote:
> >
> > On Fri, May 17, 2019 at 1:47 PM Clément Péron <peron.clem@...il.com> wrote:
> > >
> > > Allwinner H6 has an ARM Mali-T720 MP2 which required a bus_clock.
> > >
> > > Add an optional bus_clock at the init of the panfrost driver.
> > >
> > > Signed-off-by: Clément Péron <peron.clem@...il.com>
> > > ---
> > >  drivers/gpu/drm/panfrost/panfrost_device.c | 25 +++++++++++++++++++++-
> > >  drivers/gpu/drm/panfrost/panfrost_device.h |  1 +
> > >  2 files changed, 25 insertions(+), 1 deletion(-)
> > >
> > > diff --git a/drivers/gpu/drm/panfrost/panfrost_device.c b/drivers/gpu/drm/panfrost/panfrost_device.c
> > > index 3b2bced1b015..8da6e612d384 100644
> > > --- a/drivers/gpu/drm/panfrost/panfrost_device.c
> > > +++ b/drivers/gpu/drm/panfrost/panfrost_device.c
> > > @@ -44,7 +44,8 @@ static int panfrost_clk_init(struct panfrost_device *pfdev)
> > >
> > >         pfdev->clock = devm_clk_get(pfdev->dev, NULL);
> > >         if (IS_ERR(pfdev->clock)) {
> > > -               dev_err(pfdev->dev, "get clock failed %ld\n", PTR_ERR(pfdev->clock));
> > > +               dev_err(pfdev->dev, "get clock failed %ld\n",
> > > +                       PTR_ERR(pfdev->clock));
> >
> > Please drop this whitespace change.
>
> Sorry, I thought it was only a mistake here, I will drop it.
> Why are they so many lines over 80 characters?

I'd guess most are prints and/or just slightly over.

> Is there a specific coding style to follow ?

Yes, but generally the 80 character thing is more a guidance. Not
having unrelated changes in a single commit is more of a hard rule.

Rob