Re: [PATCH 0/4] NV12 rotation GTT handling prep work

Ville Syrjälä
2015-09-21T12:18:22Z

On Mon, Sep 21, 2015 at 10:45:31AM +0100, Tvrtko Ursulin wrote:
> From: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
>
> GTT page remapping logic for 90/270 rotation needs some
> extensions to support NV12 90/270 rotation work which is
> currently underway.
>
> Main thing is really to support building of the rotated
> page mapping from two planes instead of one, and adding
> appropriate calculations for the half-height UV plane
> geometry.
>
> Those are stored in the existing rotation info data
> associated with the rotated view and are also used to
> return the appropriate plane start address when queried
> from the display code.

BTW I started to hatch something to uswe
intel_gen4_compute_page_offset() on SKL+, and also start to handle fb
offsets[0] somehow. I didn't get too far yet, but I figured I'll post a
reference here in case people are intersted in this sort of stuff:

git://github.com/vsyrjala/linux.git tile_size

>
> Tvrtko Ursulin (4):
> drm/i915: Support planar formats in tile height calculations
> drm/i915: Support appending to the rotated pages mapping
> drm/i915: Support NV12 in rotated GGTT mapping
> drm/i915: Enable querying offset of UV plane with
> intel_plane_obj_offset
>
> drivers/gpu/drm/i915/i915_gem_gtt.c | 58 ++++++++++++++++++++++++++++--------
> drivers/gpu/drm/i915/i915_gem_gtt.h | 4 +++
> drivers/gpu/drm/i915/intel_display.c | 48 ++++++++++++++++++++++-------
> drivers/gpu/drm/i915/intel_drv.h | 6 ++--
> drivers/gpu/drm/i915/intel_sprite.c | 4 +--
> 5 files changed, 93 insertions(+), 27 deletions(-)
>
> --
> 2.5.1
>
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--
Ville Syrjälä
Intel OTC