Mesa (master): radeonsi: fix polygon offset scale

[Marek Olšák]

Module: Mesa
Branch: master
Commit: bfac8ba9d32be351277c7ea814ac9848bdcb1f16
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=bfac8ba9d32be351277c7ea814ac9848bdcb1f16

Author: Marek Olšák <marek.olsak at amd.com>
Date:   Tue Aug 11 22:36:51 2015 +0200

radeonsi: fix polygon offset scale

The value was copied from r300g, which uses 1/12 subpixels, but this hw
uses 1/16 subpixels.

Fixes piglit: gl-1.4-polygon-offset (formerly a glean test)

Reviewed-by: Michel Dänzer <michel.daenzer at amd.com>
Cc: mesa-stable at lists.freedesktop.org

---

 src/gallium/drivers/radeonsi/si_state.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/gallium/drivers/radeonsi/si_state.c b/src/gallium/drivers/radeonsi/si_state.c
index 7b45273..3260943 100644
--- a/src/gallium/drivers/radeonsi/si_state.c
+++ b/src/gallium/drivers/radeonsi/si_state.c
@@ -666,7 +666,7 @@ static void *si_create_rs_state(struct pipe_context *ctx,
 
 	/* offset */
 	rs->offset_units = state->offset_units;
-	rs->offset_scale = state->offset_scale * 12.0f;
+	rs->offset_scale = state->offset_scale * 16.0f;
 
 	si_pm4_set_reg(pm4, R_0286D4_SPI_INTERP_CONTROL_0,
 		S_0286D4_FLAT_SHADE_ENA(1) |