[PATCH 3/7] drm: Add support for optional per-plane rotation property

[Ville Syrjälä]

On Wed, Jul 20, 2016 at 04:51:57PM +0300, Joonas Lahtinen wrote:
> On ke, 2016-07-20 at 16:18 +0300, ville.syrjala at linux.intel.com wrote:
> > From: Ville Syrjälä <ville.syrjala at linux.intel.com>
> > 
> > Not all planes on the ssytem may support the same rotations/reflections,
> 
> s/ssytem/system/
> 
> > so make it possible to create a separate property for each plane.
> > This way userspace gets told exactly which rotations/reflections are
> > possible for each plane.
> > 
> > Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
> > ---
> >  drivers/gpu/drm/drm_atomic.c    | 6 ++++--
> >  drivers/gpu/drm/drm_fb_helper.c | 6 +++++-
> >  include/drm/drm_crtc.h          | 2 ++
> >  3 files changed, 11 insertions(+), 3 deletions(-)
> > 
> > diff --git a/drivers/gpu/drm/drm_atomic.c b/drivers/gpu/drm/drm_atomic.c
> > index 5f0002897862..38b023da6f09 100644
> > --- a/drivers/gpu/drm/drm_atomic.c
> > +++ b/drivers/gpu/drm/drm_atomic.c
> > @@ -710,7 +710,8 @@ int drm_atomic_plane_set_property(struct drm_plane 
> > *plane,
> >            state->src_w = val;
> >    } else if (property == config->prop_src_h) {
> >            state->src_h = val;
> > -   } else if (property == config->rotation_property) {
> > +   } else if (property == config->rotation_property ||
> > +              property == plane->rotation_property) {
> >            if (!is_power_of_2(val & DRM_ROTATE_MASK))
> >                    return -EINVAL;
> >            state->rotation = val;
> > @@ -768,7 +769,8 @@ drm_atomic_plane_get_property(struct drm_plane *plane,
> >            *val = state->src_w;
> >    } else if (property == config->prop_src_h) {
> >            *val = state->src_h;
> > -   } else if (property == config->rotation_property) {
> > +   } else if (property == config->rotation_property ||
> > +              property == plane->rotation_property) {
> >            *val = state->rotation;
> >    } else if (plane->funcs->atomic_get_property) {
> >            return plane->funcs->atomic_get_property(plane, state, 
> > property, val);
> > diff --git a/drivers/gpu/drm/drm_fb_helper.c 
> > b/drivers/gpu/drm/drm_fb_helper.c
> > index ce54e985d91b..ce536c0553e5 100644
> > --- a/drivers/gpu/drm/drm_fb_helper.c
> > +++ b/drivers/gpu/drm/drm_fb_helper.c
> > @@ -392,7 +392,11 @@ static int restore_fbdev_mode(struct drm_fb_helper 
> > *fb_helper)
> >            if (plane->type != DRM_PLANE_TYPE_PRIMARY)
> >                    drm_plane_force_disable(plane);
> >  
> > -           if (dev->mode_config.rotation_property) {
> > +           if (plane->rotation_property) {
> > +                   drm_mode_plane_set_obj_prop(plane,
> > +                                               
> > plane->rotation_property,
> > +                                               BIT(DRM_ROTATE_0));
> > +           } else if (dev->mode_config.rotation_property) {
> 
> Why not clear the mode_config.rotation_property too, still?

I would be cleared if any plane uses it. Though I'm not sure mixing
per-plane and global rotation props in one device makes any real sense.

Or maybe I should just nuke the global property?

> 
> Regards, Joonas
> 
> >                    drm_mode_plane_set_obj_prop(plane,
> >                                                
> > dev->mode_config.rotation_property,
> >                                                BIT(DRM_ROTATE_0));
> > diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h
> > index b7ac7dcf52db..8d65e85d6d91 100644
> > --- a/include/drm/drm_crtc.h
> > +++ b/include/drm/drm_crtc.h
> > @@ -1737,6 +1737,8 @@ struct drm_plane {
> >    const struct drm_plane_helper_funcs *helper_private;
> >  
> >    struct drm_plane_state *state;
> > +
> > +   struct drm_property *rotation_property;
> >  };
> >  
> >  /**
> -- 
> Joonas Lahtinen
> Open Source Technology Center
> Intel Corporation

-- 
Ville Syrjälä
Intel OTC