Re: [PATCH 4/7] drm/i915: Use the per-plane rotation property

[Joonas Lahtinen <joonas.lahtinen@linux.intel.com>]

On ke, 2016-07-20 at 16:18 +0300, ville.syrjala@linux.intel.com wrote:
> From: Ville Syrjälä <ville.syrjala@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@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.

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
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