Re: [PATCH 8/9] drm/i915: Don't populate plane->plane for cursors and sprites

["Ville Syrjälä" <ville.syrjala@linux.intel.com>]

On Thu, Dec 15, 2016 at 05:05:05PM -0200, Paulo Zanoni wrote:
> Em Ter, 2016-11-22 às 18:02 +0200, ville.syrjala@linux.intel.com
> escreveu:
> > From: Ville Syrjälä <ville.syrjala@linux.intel.com>
> > 
> > With plane->plane now purely reserved for the primary planes, let's
> > not even populate it for cursors and sprites. Let's switch the type
> > to enum plane as well since it's no longer being abused for anything
> > else.
> 
> Since it's a primary plane thing, I think it makes more sense to just
> leave it at struct intel_crtc instead of having a field that's unused
> and doesn't make sense in some cases.

Primary plane aren't really primary planes on old platforms though.
That's just a software concept that has no bearing on the hardware.

> The crtc struct already includes
> some fields that are specific to primary planes, so I think it's a good
> place. Or we could create a new class: struct intel_primary_plane {
> struct intel_plane base; enum plane legacy_plane };
> 
> Following is a patch suggestion (probably impossible to apply due to my
> editor breaking long lines). Any arguments against it?
> 
> --8<----------------------------------------------------------
> 
> diff --git a/drivers/gpu/drm/i915/intel_display.c
> b/drivers/gpu/drm/i915/intel_display.c
> index bc1af87..c54b1a7 100644
> --- a/drivers/gpu/drm/i915/intel_display.c
> +++ b/drivers/gpu/drm/i915/intel_display.c
> @@ -15065,14 +15065,6 @@ intel_primary_plane_create(struct
> drm_i915_private *dev_priv, enum pipe pipe)
>  		state->scaler_id = -1;
>  	}
>  	primary->pipe = pipe;
> -	/*
> -	 * On gen2/3 only plane A can do FBC, but the panel fitter and
> LVDS
> -	 * port is hooked to pipe B. Hence we want plane A feeding
> pipe B.
> -	 */
> -	if (HAS_FBC(dev_priv) && INTEL_GEN(dev_priv) < 4)
> -		primary->plane = (enum plane) !pipe;
> -	else
> -		primary->plane = (enum plane) pipe;
>  	primary->id = PLANE_PRIMARY;
>  	primary->frontbuffer_bit = INTEL_FRONTBUFFER_PRIMARY(pipe);
>  	primary->check_plane = intel_check_primary_plane;
> @@ -15120,7 +15112,7 @@ intel_primary_plane_create(struct
> drm_i915_private *dev_priv, enum pipe pipe)
>  					       0, &intel_plane_funcs,
>  					       intel_primary_formats,
> num_formats,
>  					       DRM_PLANE_TYPE_PRIMARY,
> -					       "plane %c",
> plane_name(primary->plane));
> +					       "plane %c",
> pipe_name(pipe)); /* FIXME */
>  	if (ret)
>  		goto fail;
>  
> @@ -15272,7 +15264,6 @@ intel_cursor_plane_create(struct
> drm_i915_private *dev_priv, enum pipe pipe)
>  	cursor->can_scale = false;
>  	cursor->max_downscale = 1;
>  	cursor->pipe = pipe;
> -	cursor->plane = pipe;
>  	cursor->id = PLANE_CURSOR;
>  	cursor->frontbuffer_bit = INTEL_FRONTBUFFER_CURSOR(pipe);
>  	cursor->check_plane = intel_check_cursor_plane;
> @@ -15390,7 +15381,14 @@ static int intel_crtc_init(struct
> drm_i915_private *dev_priv, enum pipe pipe)
>  		goto fail;
>  
>  	intel_crtc->pipe = pipe;
> -	intel_crtc->plane = primary->plane;
> +	/*
> +	 * On gen2/3 only plane A can do FBC, but the panel fitter and
> LVDS
> +	 * port is hooked to pipe B. Hence we want plane A feeding
> pipe B.
> +	 */
> +	if (HAS_FBC(dev_priv) && INTEL_GEN(dev_priv) < 4)
> +		intel_crtc->plane = (enum plane) !pipe;
> +	else
> +		intel_crtc->plane = (enum plane) pipe;
>  
>  	intel_crtc->cursor_base = ~0;
>  	intel_crtc->cursor_cntl = ~0;
> @@ -16866,11 +16864,11 @@ void i915_redisable_vga(struct
> drm_i915_private *dev_priv)
>  	intel_display_power_put(dev_priv, POWER_DOMAIN_VGA);
>  }
>  
> -static bool primary_get_hw_state(struct intel_plane *plane)
> +static bool primary_get_hw_state(struct intel_crtc *crtc)
>  {
> -	struct drm_i915_private *dev_priv = to_i915(plane->base.dev);
> +	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
>  
> -	return I915_READ(DSPCNTR(plane->plane)) &
> DISPLAY_PLANE_ENABLE;
> +	return I915_READ(DSPCNTR(crtc->plane)) & DISPLAY_PLANE_ENABLE;
>  }
>  
>  /* FIXME read out full plane state for all planes */
> @@ -16880,8 +16878,7 @@ static void readout_plane_state(struct
> intel_crtc *crtc)
>  	struct intel_plane_state *plane_state =
>  		to_intel_plane_state(primary->state);
>  
> -	plane_state->base.visible = crtc->active &&
> -		primary_get_hw_state(to_intel_plane(primary));
> +	plane_state->base.visible = crtc->active &&
> primary_get_hw_state(crtc);
>  
>  	if (plane_state->base.visible)
>  		crtc->base.state->plane_mask |= 1 <<
> drm_plane_index(primary);
> diff --git a/drivers/gpu/drm/i915/intel_drv.h
> b/drivers/gpu/drm/i915/intel_drv.h
> index 362f698..b2bdd49 100644
> --- a/drivers/gpu/drm/i915/intel_drv.h
> +++ b/drivers/gpu/drm/i915/intel_drv.h
> @@ -767,7 +767,6 @@ struct intel_plane_wm_parameters {
>  
>  struct intel_plane {
>  	struct drm_plane base;
> -	u8 plane;
>  	enum plane_id id;
>  	enum pipe pipe;
>  	bool can_scale;
> diff --git a/drivers/gpu/drm/i915/intel_sprite.c
> b/drivers/gpu/drm/i915/intel_sprite.c
> index 63154a5..1044095 100644
> --- a/drivers/gpu/drm/i915/intel_sprite.c
> +++ b/drivers/gpu/drm/i915/intel_sprite.c
> @@ -1111,7 +1111,6 @@ intel_sprite_plane_create(struct drm_i915_private
> *dev_priv,
>  	}
>  
>  	intel_plane->pipe = pipe;
> -	intel_plane->plane = plane;
>  	intel_plane->id = PLANE_SPRITE0 + plane;
>  	intel_plane->frontbuffer_bit = INTEL_FRONTBUFFER_SPRITE(pipe,
> plane);
>  	intel_plane->check_plane = intel_check_sprite_plane;
> 
> --8<----------------------------------------------------------
> 
> > 
> > Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
> > ---
> >  drivers/gpu/drm/i915/intel_display.c | 1 -
> >  drivers/gpu/drm/i915/intel_drv.h     | 2 +-
> >  drivers/gpu/drm/i915/intel_sprite.c  | 1 -
> >  3 files changed, 1 insertion(+), 3 deletions(-)
> > 
> > diff --git a/drivers/gpu/drm/i915/intel_display.c
> > b/drivers/gpu/drm/i915/intel_display.c
> > index b6d5d5e5cc99..f180f14fcf3a 100644
> > --- a/drivers/gpu/drm/i915/intel_display.c
> > +++ b/drivers/gpu/drm/i915/intel_display.c
> > @@ -15188,7 +15188,6 @@ intel_cursor_plane_create(struct
> > drm_i915_private *dev_priv, enum pipe pipe)
> >  	cursor->can_scale = false;
> >  	cursor->max_downscale = 1;
> >  	cursor->pipe = pipe;
> > -	cursor->plane = pipe;
> >  	cursor->id = PLANE_CURSOR;
> >  	cursor->frontbuffer_bit = INTEL_FRONTBUFFER_CURSOR(pipe);
> >  	cursor->check_plane = intel_check_cursor_plane;
> > diff --git a/drivers/gpu/drm/i915/intel_drv.h
> > b/drivers/gpu/drm/i915/intel_drv.h
> > index c1b245853ba9..d14718e09911 100644
> > --- a/drivers/gpu/drm/i915/intel_drv.h
> > +++ b/drivers/gpu/drm/i915/intel_drv.h
> > @@ -767,7 +767,7 @@ struct intel_plane_wm_parameters {
> >  
> >  struct intel_plane {
> >  	struct drm_plane base;
> > -	u8 plane;
> > +	enum plane plane;
> >  	enum plane_id id;
> >  	enum pipe pipe;
> >  	bool can_scale;
> > diff --git a/drivers/gpu/drm/i915/intel_sprite.c
> > b/drivers/gpu/drm/i915/intel_sprite.c
> > index 63154a5a9305..1044095d0084 100644
> > --- a/drivers/gpu/drm/i915/intel_sprite.c
> > +++ b/drivers/gpu/drm/i915/intel_sprite.c
> > @@ -1111,7 +1111,6 @@ intel_sprite_plane_create(struct
> > drm_i915_private *dev_priv,
> >  	}
> >  
> >  	intel_plane->pipe = pipe;
> > -	intel_plane->plane = plane;
> >  	intel_plane->id = PLANE_SPRITE0 + plane;
> >  	intel_plane->frontbuffer_bit =
> > INTEL_FRONTBUFFER_SPRITE(pipe, plane);
> >  	intel_plane->check_plane = intel_check_sprite_plane;

-- 
Ville Syrjälä
Intel OTC
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