From mboxrd@z Thu Jan  1 00:00:00 1970
From: Daniel Vetter <daniel@ffwll.ch>
Subject: Re: [Intel-gfx] [PATCH 5/6] drm/i915: Handle framebuffer offsets[]
Date: Thu, 24 May 2012 21:01:24 +0200
Message-ID: <20120524190124.GG5078@phenom.ffwll.local>
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To: Ville =?iso-8859-1?Q?Syrj=E4l=E4?= <ville.syrjala@linux.intel.com>
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On Thu, May 24, 2012 at 09:49:15PM +0300, Ville Syrj=E4l=E4 wrote:
> On Thu, May 24, 2012 at 11:31:32AM -0700, Jesse Barnes wrote:
> > On Thu, 24 May 2012 21:08:58 +0300
> > ville.syrjala@linux.intel.com wrote:
> > =

> > > From: Ville Syrj=E4l=E4 <ville.syrjala@linux.intel.com>
> > > =

> > > Take fb->offset[0] into account when calculating the linear and tile =
x/y
> > > offsets.
> > > =

> > > For non-tiled surfaces fb->offset[0] is simply added to the linear
> > > byte offset.
> > > =

> > > For tiled surfaces treat fb->offsets[0] as a byte offset into the
> > > linearized view of the surface. So we end up converting fb->offsets[0]
> > > into additional x and y offsets.
> > =

> > Do you have code using a non-zero offsets[0]?  At least for current
> > code that would indicate some kind of problem... though hopefully we'll
> > be adding planar support back again sometime soon.
> =

> I did have some test app that used offsets[] at some point, but tbh I
> didn't excercise these changes with it.
> =

> I have a sort of semi working skeleton of a test app which I just modify
> for various use cases as need arises. I really should try to clean it up
> a bit and generalize it so that it wouldn't need constant code changes
> to test different scenarios.

Yeah, I want these little test apps as testcases in i-g-t.
-Daniel
-- =

Daniel Vetter
Mail: daniel@ffwll.ch
Mobile: +41 (0)79 365 57 48