[Intel-gfx] i915: Dealing with 90° rotated display ?

[Ville Syrjälä]

On Wed, Feb 15, 2017 at 03:54:17PM +0100, Hans de Goede wrote:
> Hi Jani,
> 
> As discussed here:
> 
> https://bugs.freedesktop.org/show_bug.cgi?id=94894
> 
> I've a mini-laptop which uses a phone-screen,
> so the native orientation of the screen is portrait,
> where as for a clam-shell device one wants it to
> be landscape. Ideally there would be a flag somewhere
> to tell the i915 driver that the panel is mounted
> 90° rotated in its bezel and have the i915 driver
> apply that rotation on top of whatever rotation
> userspace requests.
> 
> So question is there already a place (variable) in
> the i915 driver where one can set such a rotation
> offset to apply on top of what userspace requests ?
> 
> If not do you have any idea how feasible adding one
> would be and can you give me a few pointers / hints
> where to start with such a thing ?

You could have a look at my branch (which I pointed out in the bug).

But note that 90/270 degree rotation is a little busted currently.
You'll need at least
https://patchwork.freedesktop.org/patch/120208/

-- 
Ville Syrjälä
Intel OTC