linux-kernel - Re: [PATCH] drm/gma500: remove helper function

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Date:	Mon, 8 Feb 2016 10:03:48 +0100
From:	Daniel Vetter <daniel@...ll.ch>
To:	Patrik Jakobsson <patrik.r.jakobsson@...il.com>
Cc:	Sudip Mukherjee <sudipm.mukherjee@...il.com>,
	David Airlie <airlied@...ux.ie>,
	Daniel Vetter <daniel.vetter@...ll.ch>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	dri-devel <dri-devel@...ts.freedesktop.org>
Subject: Re: [PATCH] drm/gma500: remove helper function

On Sat, Feb 06, 2016 at 06:09:13PM +0100, Patrik Jakobsson wrote:
> On Tue, Feb 2, 2016 at 7:05 AM, Sudip Mukherjee
> <sudipm.mukherjee@...il.com> wrote:
> > We were getting build warning about:
> > drivers/gpu/drm/gma500/mdfld_dsi_output.c:407:2: warning: initialization
> >         from incompatible pointer type
> >
> > The callback to dpms was pointing to a helper function which had a
> > return type of void, whereas the callback should point to a function
> > which has a return type of int.
> > On closer look it turned out that we do not need the helper function
> > since if we call drm_helper_connector_dpms() directly, the first check
> > that drm_helper_connector_dpms() does is: if (mode == connector->dpms)
> >
> > Signed-off-by: Sudip Mukherjee <sudip@...torindia.org>
> 
> Looks good, thanks.
> 
> Signed-off-by: Patrik Jakobsson <patrik.r.jakobsson@...il.com>

Applied to drm-misc, thanks.
-Daniel

> 
> > ---
> >  drivers/gpu/drm/gma500/mdfld_dsi_output.c | 12 +-----------
> >  1 file changed, 1 insertion(+), 11 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/gma500/mdfld_dsi_output.c b/drivers/gpu/drm/gma500/mdfld_dsi_output.c
> > index d758f4c..907cb51 100644
> > --- a/drivers/gpu/drm/gma500/mdfld_dsi_output.c
> > +++ b/drivers/gpu/drm/gma500/mdfld_dsi_output.c
> > @@ -382,16 +382,6 @@ static int mdfld_dsi_connector_mode_valid(struct drm_connector *connector,
> >         return MODE_OK;
> >  }
> >
> > -static void mdfld_dsi_connector_dpms(struct drm_connector *connector, int mode)
> > -{
> > -       if (mode == connector->dpms)
> > -               return;
> > -
> > -       /*first, execute dpms*/
> > -
> > -       drm_helper_connector_dpms(connector, mode);
> > -}
> > -
> >  static struct drm_encoder *mdfld_dsi_connector_best_encoder(
> >                                 struct drm_connector *connector)
> >  {
> > @@ -404,7 +394,7 @@ static struct drm_encoder *mdfld_dsi_connector_best_encoder(
> >
> >  /*DSI connector funcs*/
> >  static const struct drm_connector_funcs mdfld_dsi_connector_funcs = {
> > -       .dpms = /*drm_helper_connector_dpms*/mdfld_dsi_connector_dpms,
> > +       .dpms = drm_helper_connector_dpms,
> >         .detect = mdfld_dsi_connector_detect,
> >         .fill_modes = drm_helper_probe_single_connector_modes,
> >         .set_property = mdfld_dsi_connector_set_property,
> > --
> > 1.9.1
> >

-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch