Faith Ekstrand authored Aug 03, 2017 and Daniel Stone committed Aug 04, 2017

Previously, the test used the old 64x64 convention that Ville introduced
for CCS tiles and not the current 128x32 Y-tile convention.  Also, the
original scheme for generating the CCS data was over-complicated and
didn't work correctly because it assumed you could cut the main surface
at an arbitrary Y coordinate.  While you clearly *can* do this (the
hardware does), it's not a good idea for a generator in a test.  The new
scheme, introduced here, is entirely based on the relationship between
cache-lines in the main surface and the CCS that's documented in the
PRM.  By keeping everything CCS cache-line aligned, our chances of
generating correct data for an arbitrary-size surface are much higher.

[daniels: Align CCS surface size to full height, per kernel
          requirements. Invert compressed/uncompressed red back so the
	  top half of the display is compressed.]

Fixes: d900dd85

 ("tests/kms_ccs: Add test for render compression")
Signed-off-by: Jason Ekstrand <jason.ekstrand@intel.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Ben Widawsky <benjamin.widawsky@intel.com>
Cc: Daniel Stone <daniels@collabora.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Ben Widawsky <ben@bwidawsk.net>
Reviewed-by: Daniel Stone <daniels@collabora.com>
Signed-off-by: Daniel Stone <daniels@collabora.com>