Re: [PATCH 3/9] drm/i915: Add crtc->plane_ids_mask

[Paulo Zanoni <paulo.r.zanoni@intel.com>]

Em Ter, 2016-11-08 às 16:47 +0200, ville.syrjala@linux.intel.com
escreveu:
> From: Ville Syrjälä <ville.syrjala@linux.intel.com>
> 
> Add a mask of which planes are available for each pipe. This doesn't
> quite work for old platforms with dynamic plane<->pipe assignment,
> but
> as we don't support that sort of stuff (yet) we can get away with it.
> 
> The main use I have for this is the for_each_plane_id_on_crtc() macro
> for iterating over all possible planes on the crtc. I suppose we
> could
> not add the mask, and instead iterate by comparing intel_plane->pipe
> but then we'd need a local intel_plane variable which is just
> unnecessary clutter in some cases. But I'm not hung up on this, so if
> people prefer the other option I could be convinced to use it.
> 
> Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
> ---
>  drivers/gpu/drm/i915/i915_drv.h      | 4 ++++
>  drivers/gpu/drm/i915/intel_display.c | 3 +++
>  drivers/gpu/drm/i915/intel_drv.h     | 3 ++-
>  3 files changed, 9 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/i915/i915_drv.h
> b/drivers/gpu/drm/i915/i915_drv.h
> index 2451b88b1e82..2325efacbd5c 100644
> --- a/drivers/gpu/drm/i915/i915_drv.h
> +++ b/drivers/gpu/drm/i915/i915_drv.h
> @@ -201,6 +201,10 @@ enum plane_id {
>  	I915_MAX_PLANES,
>  };
>  
> +#define for_each_plane_id_on_crtc(__crtc, __p) \
> +	for ((__p) = PLANE_PRIMARY; (__p) < I915_MAX_PLANES;
> (__p)++) \
> +		for_each_if ((__crtc)->plane_ids_mask & (1 <<
> (__p)))
> +

Let's be consistent: either use BIT() everywhere or use (1 << bit)
everywhere :).

Reviewed-by: Paulo Zanoni <paulo.r.zanoni@intel.com>.


>  enum port {
>  	PORT_NONE = -1,
>  	PORT_A = 0,
> diff --git a/drivers/gpu/drm/i915/intel_display.c
> b/drivers/gpu/drm/i915/intel_display.c
> index b318119330e8..e3ed5d1fcf0d 100644
> --- a/drivers/gpu/drm/i915/intel_display.c
> +++ b/drivers/gpu/drm/i915/intel_display.c
> @@ -15293,6 +15293,7 @@ static int intel_crtc_init(struct
> drm_i915_private *dev_priv, enum pipe pipe)
>  		ret = PTR_ERR(primary);
>  		goto fail;
>  	}
> +	intel_crtc->plane_ids_mask |= BIT(primary->id);
>  
>  	for_each_sprite(dev_priv, pipe, sprite) {
>  		struct intel_plane *plane;
> @@ -15302,6 +15303,7 @@ static int intel_crtc_init(struct
> drm_i915_private *dev_priv, enum pipe pipe)
>  			ret = PTR_ERR(plane);
>  			goto fail;
>  		}
> +		intel_crtc->plane_ids_mask |= BIT(plane->id);
>  	}
>  
>  	cursor = intel_cursor_plane_create(dev_priv, pipe);
> @@ -15309,6 +15311,7 @@ static int intel_crtc_init(struct
> drm_i915_private *dev_priv, enum pipe pipe)
>  		ret = PTR_ERR(cursor);
>  		goto fail;
>  	}
> +	intel_crtc->plane_ids_mask |= BIT(cursor->id);
>  
>  	ret = drm_crtc_init_with_planes(&dev_priv->drm, &intel_crtc-
> >base,
>  					&primary->base, &cursor-
> >base,
> diff --git a/drivers/gpu/drm/i915/intel_drv.h
> b/drivers/gpu/drm/i915/intel_drv.h
> index 58fc8e1d2aa8..a3c696d8bf93 100644
> --- a/drivers/gpu/drm/i915/intel_drv.h
> +++ b/drivers/gpu/drm/i915/intel_drv.h
> @@ -689,8 +689,9 @@ struct intel_crtc {
>  	 * some outputs connected to this crtc.
>  	 */
>  	bool active;
> -	unsigned long enabled_power_domains;
>  	bool lowfreq_avail;
> +	u8 plane_ids_mask;
> +	unsigned long enabled_power_domains;
>  	struct intel_overlay *overlay;
>  	struct intel_flip_work *flip_work;
>  
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