[Intel-gfx] [PATCH 14/18] drm/i915: Embed rotation_info under intel_framebuffer

Ville Syrjälä ville.syrjala at linux.intel.com
Thu Jan 21 04:06:27 PST 2016

On Wed, Jan 20, 2016 at 09:08:50PM +0000, Chris Wilson wrote:
> On Wed, Jan 20, 2016 at 09:05:35PM +0200, ville.syrjala at linux.intel.com wrote:
> > From: Ville Syrjälä <ville.syrjala at linux.intel.com>
> > 
> > Instead of repopulatin the rotation_info struct for the fb every time
> > we try to use the fb, we can just populate it once when creating the fb,
> > and later we can just copy the pre-populate struct into the gtt_view.
> But the rotation state isn't tied to the fb, but to the plane+fb.
> i.e. I can show the same fb on an unrotated pipe at the same time as
> showing it rotated, right?

Yep. The rotation info basically just tells us how we need to shuffle
the pages for this particular fb if we want to scan it out in the
90/270 degree orientation.

Ville Syrjälä
Intel OTC

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