Mesa (10.6): radeonsi: fix polygon offset scale

[Emil Velikov]

Module: Mesa
Branch: 10.6
Commit: e7e38e11c3ec7ae03d46451ce45b7226a56ac25c
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=e7e38e11c3ec7ae03d46451ce45b7226a56ac25c

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
(cherry picked from commit bfac8ba9d32be351277c7ea814ac9848bdcb1f16)

---

 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 7f0fdd5..4d38a32 100644
--- a/src/gallium/drivers/radeonsi/si_state.c
+++ b/src/gallium/drivers/radeonsi/si_state.c
@@ -634,7 +634,7 @@ 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;
 
 	tmp = S_0286D4_FLAT_SHADE_ENA(1);
 	if (state->sprite_coord_enable) {