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

[Jindal, Sonika]

On 6/19/2014 1:25 PM, Daniel Vetter wrote:
> On Thu, Jun 19, 2014 at 9:52 AM, Jindal, Sonika <sonika.jindal at intel.com> wrote:
>>> No, this really should be done in
>>> drm_fb_helper_restore_fbdev_mode_unlocked in drm_fb_helper.c. Well, in the
>>> restore_fbdev_mode function in there. Once that's done and once omap is
>>> also using the generic rotation properties (I think it is already) we can
>>> remove the rotation handling code from omap's last_close. Please also
>>> throw a (compile-tested-only) patch on top for that so that Rob Clark can
>>> pick it up.
>>> -Daniel
>>>
>> Ok, I will add it. So should I add a function pointer say reset_properties
>> in crtc, which will be called from restore_fbdev_mode?
>
> No, I think it should directly reset the relevant properties. This
> might mean that we have to move the rotation property pointer to
> struct drm_plane so that restore_fbdev_mode can get at it. Or we wrap
> up a helper for internal property setting purposes which bails out if
> the property isn't attached to the relevant object.
So, I will move rotation_property to drm_plane and for each plane where 
this property is attached, will call drm_object_property_set_value.
Please correct me if I am wrong.
>
> This way it will automatically work for all drivers that support
> rotation. With a callback we still have the same problem that each
> driver needs to do their own magic, which means they'll get it wrong.
> Letting helpers take care of such details gives us a much stronger
> platfrom with drm drivers.
> -Daniel
>