[PATCH 1/5] drm/imx: ipuv3 plane: Introduce ipu_plane_cleanup()

[Liu Ying]

On Mon, Nov 23, 2015 at 12:48:13PM +0100, Philipp Zabel wrote:
> Am Freitag, den 20.11.2015, 16:14 +0800 schrieb Liu Ying:
> > This patch adds a helper ipu_plane_cleanup() to cleanup a IPU plane.
> > It can be used in the bailout path of ipu_crtc_init(), for instance.
> > 
> > Signed-off-by: Liu Ying <Ying.Liu at freescale.com>
> > ---
> > This patch applies to the imx-drm/fixes branch of Philipp Zabel's open git.
> > 
> >  drivers/gpu/drm/imx/ipuv3-plane.c | 6 ++++++
> >  drivers/gpu/drm/imx/ipuv3-plane.h | 2 ++
> >  2 files changed, 8 insertions(+)
> > 
> > diff --git a/drivers/gpu/drm/imx/ipuv3-plane.c b/drivers/gpu/drm/imx/ipuv3-plane.c
> > index e2ff410..e60b382 100644
> > --- a/drivers/gpu/drm/imx/ipuv3-plane.c
> > +++ b/drivers/gpu/drm/imx/ipuv3-plane.c
> > @@ -410,3 +410,9 @@ struct ipu_plane *ipu_plane_init(struct drm_device *dev, struct ipu_soc *ipu,
> >  
> >  	return ipu_plane;
> >  }
> > +
> > +void ipu_plane_cleanup(struct ipu_plane *ipu_plane)
> > +{
> > +	drm_plane_cleanup(&ipu_plane->base);
> > +	kfree(ipu_plane);
> > +}
> 
> The name says cleanup, but that's not what it does. This function should
> be named ipu_plane_free, or ipu_plane_destroy. Actually, we have that
> already.

Since ipu_crtc_init() may call ipu_plane_init()/ipu_plane_get_resources()
for a plane, the bailout path deserves the same granularity to clarity the
logic.  It looks somewhat awkward to use the callback plane->destroy() to
tear down the plane in the bailout path or to export the static function
ipu_plane_destroy() and use it directly.

I prefer to change ipu_plane_cleanup to ipu_plane_free and follow the fine
granularity way.

Regards,
Liu Ying

> 
> regards
> Philipp
>