Re: i915: Dealing with 90° rotated display ?

From: "Ville Syrjälä" <ville.syrjala@linux.intel.com>
To: Hans de Goede <hdegoede@redhat.com>
Cc: Jani Nikula <jani.nikula@intel.com>,
	intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org
Subject: Re: i915: Dealing with 90° rotated display ?
Date: Wed, 15 Feb 2017 16:59:15 +0200	[thread overview]
Message-ID: <20170215145915.GZ31595@intel.com> (raw)
In-Reply-To: <596c390e-d639-2368-88cf-80451e50f4c6@redhat.com>

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
_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel