Re: [PATCH 9/9] drm/i915: Add rotation property for sprites

[Imre Deak <imre.deak@intel.com>]

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On Mon, 2013-09-30 at 17:44 +0300, ville.syrjala@linux.intel.com wrote:
> From: Ville Syrjälä <ville.syrjala@linux.intel.com>
> 
> Sprite planes support 180 degree rotation. The lower layers are now in
> place, so hook in the standard rotation property to expose the feature
> to the users.
> 
> Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
> ---
>  drivers/gpu/drm/i915/i915_drv.h     |  1 +
>  drivers/gpu/drm/i915/intel_sprite.c | 42 ++++++++++++++++++++++++++++++++++++-
>  2 files changed, 42 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
> index 08e96a8..48d4d5f 100644
> --- a/drivers/gpu/drm/i915/i915_drv.h
> +++ b/drivers/gpu/drm/i915/i915_drv.h
> @@ -1356,6 +1356,7 @@ typedef struct drm_i915_private {
>  
>  	struct drm_property *broadcast_rgb_property;
>  	struct drm_property *force_audio_property;
> +	struct drm_property *rotation_property;
>  
>  	bool hw_contexts_disabled;
>  	uint32_t hw_context_size;
> diff --git a/drivers/gpu/drm/i915/intel_sprite.c b/drivers/gpu/drm/i915/intel_sprite.c
> index 028a979..49f8238 100644
> --- a/drivers/gpu/drm/i915/intel_sprite.c
> +++ b/drivers/gpu/drm/i915/intel_sprite.c
> @@ -1033,6 +1033,30 @@ out_unlock:
>  	return ret;
>  }
>  
> +static int intel_plane_set_property(struct drm_plane *plane,
> +				    struct drm_property *prop,
> +				    uint64_t val)
> +{
> +	struct drm_i915_private *dev_priv = plane->dev->dev_private;
> +	struct intel_plane *intel_plane = to_intel_plane(plane);
> +	uint64_t old_val;
> +	int ret = -ENOENT;
> +
> +	if (prop == dev_priv->rotation_property) {
> +		/* exactly one rotation angle please */
> +		if (hweight32(val & 0xf) != 1)
> +			return -EINVAL;
> +
> +		old_val = intel_plane->rotation;
> +		intel_plane->rotation = val;
> +		ret = intel_plane_restore(plane);
> +		if (ret)
> +			intel_plane->rotation = old_val;
> +	}
> +
> +	return ret;
> +}
> +
>  int intel_plane_restore(struct drm_plane *plane)
>  {
>  	struct intel_plane *intel_plane = to_intel_plane(plane);
> @@ -1059,6 +1083,7 @@ static const struct drm_plane_funcs intel_plane_funcs = {
>  	.update_plane = intel_update_plane,
>  	.disable_plane = intel_disable_plane,
>  	.destroy = intel_destroy_plane,
> +	.set_property = intel_plane_set_property,
>  };
>  
>  static uint32_t ilk_plane_formats[] = {
> @@ -1095,6 +1120,7 @@ static uint32_t vlv_plane_formats[] = {
>  int
>  intel_plane_init(struct drm_device *dev, enum pipe pipe, int plane)
>  {
> +	struct drm_i915_private *dev_priv = dev->dev_private;
>  	struct intel_plane *intel_plane;
>  	unsigned long possible_crtcs;
>  	const uint32_t *plane_formats;
> @@ -1168,8 +1194,22 @@ intel_plane_init(struct drm_device *dev, enum pipe pipe, int plane)
>  			     &intel_plane_funcs,
>  			     plane_formats, num_plane_formats,
>  			     false);
> -	if (ret)
> +	if (ret) {
>  		kfree(intel_plane);
> +		goto out;
> +	}
> +
> +	if (!dev_priv->rotation_property)
> +		dev_priv->rotation_property =
> +			drm_mode_create_rotation_property(dev,
> +							  BIT(DRM_ROTATE_0) |
> +							  BIT(DRM_ROTATE_180));
> +
> +	if (dev_priv->rotation_property)
> +		drm_object_attach_property(&intel_plane->base.base,
> +					   dev_priv->rotation_property,
> +					   intel_plane->rotation);

drm_mode_create_rotation_property() can fail silently, I think we should
handle it.

--Imre


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