[PATCH 2/2] drm: simple_kms_helper: add support for bridges

[Andrea Merello]

On Tue, Aug 23, 2016 at 5:20 PM, Daniel Vetter <daniel at ffwll.ch> wrote:

> On Tue, Aug 23, 2016 at 04:08:04PM +0200, Andrea Merello wrote:
> > Introduce drm_simple_display_pipe_attach_bridge() in order
> > to make it possible to use drm encoders with the simple display
> > pipes managed by simple_kms_helpers
> >
> > Suggested-by: Daniel Vetter <daniel at ffwll.ch>
> > Signed-off-by: Andrea Merello <andrea.merello at gmail.com>
> > Cc: Noralf Trønnes <noralf at tronnes.org>
> > Cc: Daniel Vetter <daniel at ffwll.ch>
> > Cc: David Airlie <airlied at linux.ie>
>
> Threading of your patch series is somehow broken, usually that should all
> work nicely if you've set up git send-email.
>
> One question: Should we ahve a drm_simple_display_pipe_detach_bridge (for
> cleanup) too?
>

Unsure if it worths. May be nice to have a balanced pair, but it would
probably end up in
a quite redundant one-line func, that only calls drm_bridge_detach with the
very same argument.

..But of course if you want I can add it in v2 series.

(ACK for all other things)

Andrea


> -Daniel
>
> >
> > diff --git a/drivers/gpu/drm/drm_simple_kms_helper.c
> b/drivers/gpu/drm/drm_simple_kms_helper.c
> > index 3a48c7c..05ee61d 100644
> > --- a/drivers/gpu/drm/drm_simple_kms_helper.c
> > +++ b/drivers/gpu/drm/drm_simple_kms_helper.c
> > @@ -133,6 +133,28 @@ static const struct drm_plane_funcs
> drm_simple_kms_plane_funcs = {
> >  };
> >
> >  /**
> > + * drm_simple_display_pipe_attach_bridge - Attach a bridge to the
> display pipe
> > + * @pipe: simple display pipe object
> > + * @bridge: bridge to attach
> > + *
> > + * Makes it possible to still use the drm_simple_display_pipe helpers
> when
> > + * a DRM bridge has to be used.
> > + * Note that you probably want to initialize the pipe by passing a NULL
> > + * connector to drm_simple_display_pipe_init()
> > + *
> > + * Returns:
> > + * Zero on success, negative error code on failure.
> > + */
> > +int drm_simple_display_pipe_attach_bridge(struct
> drm_simple_display_pipe *pipe,
> > +                                     struct drm_bridge *bridge)
> > +{
> > +     bridge->encoder = &pipe->encoder;
> > +     pipe->encoder.bridge = bridge;
> > +     return drm_bridge_attach(pipe->encoder.dev, bridge);
> > +}
> > +EXPORT_SYMBOL(drm_simple_display_pipe_attach_bridge);
> > +
> > +/**
> >   * drm_simple_display_pipe_init - Initialize a simple display pipeline
> >   * @dev: DRM device
> >   * @pipe: simple display pipe object to initialize
> > diff --git a/include/drm/drm_simple_kms_helper.h
> b/include/drm/drm_simple_kms_helper.h
> > index 2690397..1d73bcf 100644
> > --- a/include/drm/drm_simple_kms_helper.h
> > +++ b/include/drm/drm_simple_kms_helper.h
> > @@ -85,6 +85,9 @@ struct drm_simple_display_pipe {
> >       const struct drm_simple_display_pipe_funcs *funcs;
> >  };
> >
> > +int drm_simple_display_pipe_attach_bridge(struct
> drm_simple_display_pipe *pipe,
> > +                                     struct drm_bridge *bridge);
> > +
> >  int drm_simple_display_pipe_init(struct drm_device *dev,
> >                       struct drm_simple_display_pipe *pipe,
> >                       const struct drm_simple_display_pipe_funcs *funcs,
> > --
> > 2.7.4
>
> --
> Daniel Vetter
> Software Engineer, Intel Corporation
> http://blog.ffwll.ch
>
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