From mboxrd@z Thu Jan  1 00:00:00 1970
From: "Jindal, Sonika" <sonika.jindal@intel.com>
Subject: Re: [PATCH 10/11] drm/i915: Add 180 degree primary
 plane rotation support
Date: Fri, 27 Jun 2014 16:45:29 +0530
Message-ID: <53AD5251.10809@intel.com>
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To: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>, intel-gfx@lists.freedesktop.org
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On 6/27/2014 4:08 PM, Tvrtko Ursulin wrote:
> 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);
>
> Also, do we need a path for turning FBC back on once plane orientation
> goes back to a supported configuration?
>
> Regards,
>
> Tvrtko
>
True, looks like it should be added. I'l add and post.
-Sonika