[PATCH 40/59] drm/arcpgu: Stop using drm_device->dev_private

[Daniel Vetter]

On Fri, Apr 24, 2020 at 6:46 PM Sam Ravnborg <sam at ravnborg.org> wrote:
>
> Hi Daniel.
>
> On Wed, Apr 15, 2020 at 09:40:15AM +0200, Daniel Vetter wrote:
> > Upcasting using a container_of macro is more typesafe, faster and
> > easier for the compiler to optimize.
> >
> > Signed-off-by: Daniel Vetter <daniel.vetter at intel.com>
> > Cc: Alexey Brodkin <abrodkin at synopsys.com>
>
> Subject: drm/arc: arcpgu: Stop using drm_device->dev_private
>
> And another bikeshedding below.
> With this considered:
> Acked-by: Sam Ravnborg <sam at ravnborg.org>
>
> > ---
> >  drivers/gpu/drm/arc/arcpgu.h      | 2 ++
> >  drivers/gpu/drm/arc/arcpgu_crtc.c | 4 ++--
> >  drivers/gpu/drm/arc/arcpgu_drv.c  | 4 +---
> >  3 files changed, 5 insertions(+), 5 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/arc/arcpgu.h b/drivers/gpu/drm/arc/arcpgu.h
> > index cd9e932f501e..87821c91a00c 100644
> > --- a/drivers/gpu/drm/arc/arcpgu.h
> > +++ b/drivers/gpu/drm/arc/arcpgu.h
> > @@ -17,6 +17,8 @@ struct arcpgu_drm_private {
> >       struct drm_plane        *plane;
> >  };
> >
> > +#define dev_to_arcpgu(x) container_of(x, struct arcpgu_drm_private, drm)
> > +
> Preferred name is to_arcgpu(). There is no device in the name of struct
> arcpgu_drm_private. And the general consensus it to use to_<driver> for
> the top-level struct.

[Sorry just realized I never replied on-list for this here]

drm_device very much has a dev_  and there's some other drivders with
this pattern too. Plus I think it's more consistent with the other
macros in here. For simple drivers where there's only 1 structure I
agree though, so if you insist I can follow up with a patch. Fixing
this in-series is imo too much trouble for the benefit, every single
patch would need to be redone ...

Cheers, Daniel

>
> >  #define crtc_to_arcpgu_priv(x) container_of(x, struct arcpgu_drm_private, crtc)
> >
> >  static inline void arc_pgu_write(struct arcpgu_drm_private *arcpgu,
> > diff --git a/drivers/gpu/drm/arc/arcpgu_crtc.c b/drivers/gpu/drm/arc/arcpgu_crtc.c
> > index be7c29cec318..ba796a216244 100644
> > --- a/drivers/gpu/drm/arc/arcpgu_crtc.c
> > +++ b/drivers/gpu/drm/arc/arcpgu_crtc.c
> > @@ -178,7 +178,7 @@ static const struct drm_plane_funcs arc_pgu_plane_funcs = {
> >
> >  static struct drm_plane *arc_pgu_plane_init(struct drm_device *drm)
> >  {
> > -     struct arcpgu_drm_private *arcpgu = drm->dev_private;
> > +     struct arcpgu_drm_private *arcpgu = dev_to_arcpgu(drm);
> >       struct drm_plane *plane = NULL;
> >       int ret;
> >
> > @@ -202,7 +202,7 @@ static struct drm_plane *arc_pgu_plane_init(struct drm_device *drm)
> >
> >  int arc_pgu_setup_crtc(struct drm_device *drm)
> >  {
> > -     struct arcpgu_drm_private *arcpgu = drm->dev_private;
> > +     struct arcpgu_drm_private *arcpgu = dev_to_arcpgu(drm);
> >       struct drm_plane *primary;
> >       int ret;
> >
> > diff --git a/drivers/gpu/drm/arc/arcpgu_drv.c b/drivers/gpu/drm/arc/arcpgu_drv.c
> > index bbd7acb150f3..81b8d7ae6623 100644
> > --- a/drivers/gpu/drm/arc/arcpgu_drv.c
> > +++ b/drivers/gpu/drm/arc/arcpgu_drv.c
> > @@ -50,8 +50,6 @@ static int arcpgu_load(struct arcpgu_drm_private *arcpgu)
> >       struct resource *res;
> >       int ret;
> >
> > -     drm->dev_private = arcpgu;
> > -
> >       arcpgu->clk = devm_clk_get(drm->dev, "pxlclk");
> >       if (IS_ERR(arcpgu->clk))
> >               return PTR_ERR(arcpgu->clk);
> > @@ -120,7 +118,7 @@ static int arcpgu_show_pxlclock(struct seq_file *m, void *arg)
> >  {
> >       struct drm_info_node *node = (struct drm_info_node *)m->private;
> >       struct drm_device *drm = node->minor->dev;
> > -     struct arcpgu_drm_private *arcpgu = drm->dev_private;
> > +     struct arcpgu_drm_private *arcpgu = dev_to_arcpgu(drm);
> >       unsigned long clkrate = clk_get_rate(arcpgu->clk);
> >       unsigned long mode_clock = arcpgu->crtc.mode.crtc_clock * 1000;
> >
> > --
> > 2.25.1
> >
> > _______________________________________________
> > dri-devel mailing list
> > dri-devel at lists.freedesktop.org
> > https://lists.freedesktop.org/mailman/listinfo/dri-devel



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