On Wed, Jul 20, 2016 at 04:57:32PM +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>
> > 
> > On certain platforms not all planes support the same set of
> > rotations/reflections, so let's use the per-plane property
> > for this.
> > 
> > This is already a problem on SKL when we use the legay cursor plane
> > as it only supports 0|180 whereas the universal planes support
> > 0|90|180|270, and it will be a problem on CHV soon.
> > 
> > Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
> > ---
> >  drivers/gpu/drm/i915/intel_display.c | 51 
> > +++++++++++++++++++-----------------
> >  drivers/gpu/drm/i915/intel_drv.h     |  4 +--
> >  drivers/gpu/drm/i915/intel_sprite.c  | 12 ++++++++-
> >  3 files changed, 40 insertions(+), 27 deletions(-)
> > 
> > diff --git a/drivers/gpu/drm/i915/intel_display.c 
> > b/drivers/gpu/drm/i915/intel_display.c
> > index 08b9f9a19df0..93ecb259c5ce 100644
> > --- a/drivers/gpu/drm/i915/intel_display.c
> > +++ b/drivers/gpu/drm/i915/intel_display.c
> > @@ -14217,6 +14217,7 @@ static struct drm_plane 
> > *intel_primary_plane_create(struct drm_device *dev,
> >    struct intel_plane *primary = NULL;
> >    struct intel_plane_state *state = NULL;
> >    const uint32_t *intel_primary_formats;
> > +   unsigned int supported_rotations;
> >    unsigned int num_formats;
> >    int ret;
> >  
> > @@ -14289,8 +14290,19 @@ static struct drm_plane 
> > *intel_primary_plane_create(struct drm_device *dev,
> >    if (ret)
> >            goto fail;
> >  
> > +   if (INTEL_INFO(dev)->gen >= 9) {
> > +           supported_rotations =
> > +                   BIT(DRM_ROTATE_0) | BIT(DRM_ROTATE_90) |
> > +                   BIT(DRM_ROTATE_180) | BIT(DRM_ROTATE_270);
> > +   } else if (INTEL_INFO(dev)->gen >= 4) {
> > +           supported_rotations =
> > +                   BIT(DRM_ROTATE_0) | BIT(DRM_ROTATE_180);
> > +   } else {
> > +           supported_rotations = BIT(DRM_ROTATE_0);
> > +   }
> > +
> 
> Might this be more informative if it was;
> 
> supported_rotations = BIT(DRM_ROTATE_0);
> 
> if (gen >= 4)
>       supported_rotations |= BIT(DRM_ROTATE_180);
> 
> Then you could exclude too, for special platforms.

I think I prefer to have explicit "these platforms support exactly these 
things".
Less thinking required.

> 
> Also, use INTEL_GEN()
> 
> >    if (INTEL_INFO(dev)->gen >= 4)
> > -           intel_create_rotation_property(dev, primary);
> > +           intel_create_rotation_property(primary, supported_rotations);
> >  
> >    drm_plane_helper_add(&primary->base, &intel_plane_helper_funcs);
> >  
> > @@ -14303,22 +14315,20 @@ fail:
> >    return NULL;
> >  }
> >  
> > -void intel_create_rotation_property(struct drm_device *dev, struct 
> > intel_plane *plane)
> > +void intel_create_rotation_property(struct intel_plane *plane,
> > +                               unsigned int supported_rotations)
> >  {
> > -   if (!dev->mode_config.rotation_property) {
> > -           unsigned long flags = BIT(DRM_ROTATE_0) |
> > -                   BIT(DRM_ROTATE_180);
> > +   struct drm_device *dev = plane->base.dev;
> >  
> > -           if (INTEL_INFO(dev)->gen >= 9)
> > -                   flags |= BIT(DRM_ROTATE_90) | BIT(DRM_ROTATE_270);
> > +   if (!plane->base.rotation_property)
> > +           plane->base.rotation_property =
> > +                   drm_mode_create_rotation_property(dev,
> > +                                                     
> > supported_rotations);
> >  
> > -           dev->mode_config.rotation_property =
> > -                   drm_mode_create_rotation_property(dev, flags);
> > -   }
> > -   if (dev->mode_config.rotation_property)
> > +   if (plane->base.rotation_property)
> >            drm_object_attach_property(&plane->base.base,
> > -                           dev->mode_config.rotation_property,
> > -                           plane->base.state->rotation);
> > +                                      plane->base.rotation_property,
> > +                                      plane->base.state->rotation);
> >  }
> >  
> >  static int
> > @@ -14449,17 +14459,10 @@ static struct drm_plane 
> > *intel_cursor_plane_create(struct drm_device *dev,
> >    if (ret)
> >            goto fail;
> >  
> > -   if (INTEL_INFO(dev)->gen >= 4) {
> > -           if (!dev->mode_config.rotation_property)
> > -                   dev->mode_config.rotation_property =
> > -                           drm_mode_create_rotation_property(dev,
> > -                                                   BIT(DRM_ROTATE_0) |
> > -                                                   BIT(DRM_ROTATE_180));
> > -           if (dev->mode_config.rotation_property)
> > -                   drm_object_attach_property(&cursor->base.base,
> > -                           dev->mode_config.rotation_property,
> > -                           state->base.rotation);
> > -   }
> > +   if (INTEL_INFO(dev)->gen >= 4)
> 
> INTEL_GEN() while touching it.
> 
> > +           intel_create_rotation_property(cursor,
> > +                                          BIT(DRM_ROTATE_0) |
> > +                                          BIT(DRM_ROTATE_180));
> >  
> >    if (INTEL_INFO(dev)->gen >=9)
> >            state->scaler_id = -1;
> > diff --git a/drivers/gpu/drm/i915/intel_drv.h 
> > b/drivers/gpu/drm/i915/intel_drv.h
> > index 907a72cfdad3..2715aec979fc 100644
> > --- a/drivers/gpu/drm/i915/intel_drv.h
> > +++ b/drivers/gpu/drm/i915/intel_drv.h
> > @@ -1255,8 +1255,8 @@ int intel_plane_atomic_calc_changes(struct 
> > drm_crtc_state *crtc_state,
> >  unsigned int intel_tile_height(const struct drm_i915_private *dev_priv,
> >                           uint64_t fb_modifier, unsigned int cpp);
> >  
> > -void intel_create_rotation_property(struct drm_device *dev,
> > -                                   struct intel_plane *plane);
> > +void intel_create_rotation_property(struct intel_plane *plane,
> > +                               unsigned int supported_rotations);
> >  
> >  void assert_pch_transcoder_disabled(struct drm_i915_private *dev_priv,
> >                                enum pipe pipe);
> > diff --git a/drivers/gpu/drm/i915/intel_sprite.c 
> > b/drivers/gpu/drm/i915/intel_sprite.c
> > index cc6af1410d67..bc41c1bba04c 100644
> > --- a/drivers/gpu/drm/i915/intel_sprite.c
> > +++ b/drivers/gpu/drm/i915/intel_sprite.c
> > @@ -1046,6 +1046,7 @@ intel_plane_init(struct drm_device *dev, enum pipe 
> > pipe, int plane)
> >    struct intel_plane_state *state = NULL;
> >    unsigned long possible_crtcs;
> >    const uint32_t *plane_formats;
> > +   unsigned int supported_rotations;
> >    int num_plane_formats;
> >    int ret;
> >  
> > @@ -1121,6 +1122,15 @@ intel_plane_init(struct drm_device *dev, enum pipe 
> > pipe, int plane)
> >            goto fail;
> >    }
> >  
> > +   if (INTEL_INFO(dev)->gen >= 9) {
> > +           supported_rotations =
> > +                   BIT(DRM_ROTATE_0) | BIT(DRM_ROTATE_90) |
> > +                   BIT(DRM_ROTATE_180) | BIT(DRM_ROTATE_270);
> > +   } else {
> > +           supported_rotations =
> > +                   BIT(DRM_ROTATE_0) | BIT(DRM_ROTATE_180);
> > +   }
> > +
> 
> Same here, I'd put the |='s in order so that new gens add features,
> making easier to get a picture of what was added at which point.
> 
> Regards, Joonas
> 
> >    intel_plane->pipe = pipe;
> >    intel_plane->plane = plane;
> >    intel_plane->frontbuffer_bit = INTEL_FRONTBUFFER_SPRITE(pipe, plane);
> > @@ -1143,7 +1153,7 @@ intel_plane_init(struct drm_device *dev, enum pipe 
> > pipe, int plane)
> >    if (ret)
> >            goto fail;
> >  
> > -   intel_create_rotation_property(dev, intel_plane);
> > +   intel_create_rotation_property(intel_plane, supported_rotations);
> >  
> >    drm_plane_helper_add(&intel_plane->base, &intel_plane_helper_funcs);
> >  
> -- 
> Joonas Lahtinen
> Open Source Technology Center
> Intel Corporation

-- 
Ville Syrjälä
Intel OTC

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