Re: [PATCH 10/11] drm/i915: Add 180 degree primary plane rotation support

Tvrtko Ursulin
2014-06-27T10:35:00Z

Hi,

On 06/18/2014 09:57 AM, sonika.jindal@intel.com wrote:
[snip]
> +static int intel_primary_plane_set_property(struct drm_plane *plane,
> + struct drm_property *prop,
> + uint64_t val)
> +{
> + struct drm_device *dev = plane->dev;
> + struct drm_i915_private *dev_priv = dev->dev_private;
> + struct intel_plane *intel_plane = to_intel_plane(plane);
> + struct intel_crtc *intel_crtc = to_intel_crtc(plane->crtc);
> + struct drm_crtc *crtc = &intel_crtc->base;
> + 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;
> +
> + if (intel_crtc->active && intel_crtc->primary_enabled) {
> + intel_crtc_wait_for_pending_flips(crtc);
> +
> + /* FBC does not work on some platforms for rotated planes */
> + if (dev_priv->fbc.plane == intel_crtc->plane &&
> + INTEL_INFO(dev)->gen <= 4 && !IS_G4X(dev) &&
> + intel_plane->rotation != BIT(DRM_ROTATE_0))
> + intel_disable_fbc(dev);
> +
> + dev_priv->display.update_primary_plane(crtc, crtc->primary->fb, 0, 0);
> + } else {
> + DRM_DEBUG_KMS("[CRTC:%d] is not active. Only rotation property is updated\n",
> + crtc->base.id);
> + ret = 0;
> + }
> + }
> +
> + return ret;
> +}

It looks like this will incorrectly propagate -ENOENT if property on an
active plane is modified.

Regards,

Tvrtko