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i965: Set "Position XY Offset Select" bits in 3DSTATE_PS on Broadwell.

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Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Eric Anholt <eric@anholt.net>
Reviewed-by: Anuj Phogat <anuj.phogat@gmail.com>
This commit is contained in:
Kenneth Graunke 2014-02-10 17:31:00 -08:00
parent 01c42b2be6
commit 61d7ea4b16
1 changed files with 18 additions and 0 deletions
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18
src/mesa/drivers/dri/i965/gen8_ps_state.c
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@ -184,6 +184,24 @@ upload_ps_state(struct brw_context *brw)
if (brw->wm.prog_data->prog_offset_16)
dw6 |= GEN7_PS_16_DISPATCH_ENABLE;
/* From the documentation for this packet:
* "If the PS kernel does not need the Position XY Offsets to
* compute a Position Value, then this field should be programmed
* to POSOFFSET_NONE."
*
* "SW Recommendation: If the PS kernel needs the Position Offsets
* to compute a Position XY value, this field should match Position
* ZW Interpolation Mode to ensure a consistent position.xyzw
* computation."
*
* We only require XY sample offsets. So, this recommendation doesn't
* look useful at the moment. We might need this in future.
*/
if (brw->wm.prog_data->uses_pos_offset)
dw6 |= GEN7_PS_POSOFFSET_SAMPLE;
else
dw6 |= GEN7_PS_POSOFFSET_NONE;
dw7 |=
brw->wm.prog_data->first_curbe_grf << GEN7_PS_DISPATCH_START_GRF_SHIFT_0 |
brw->wm.prog_data->first_curbe_grf_16<< GEN7_PS_DISPATCH_START_GRF_SHIFT_2;