Module: Mesa
Branch: master
Commit: 9ef23e428bd18c412499471b4e3550a489b72c3f
URL:    
http://cgit.freedesktop.org/mesa/mesa/commit/?id=9ef23e428bd18c412499471b4e3550a489b72c3f

Author: Icecream95 <[email protected]>
Date:   Wed Dec 23 23:30:24 2020 +1300

panfrost: Fix discard behaviour on Bifrost

Set zs_update_operation to FORCE_LATE, as we don't want to update
depth if the fragment is discarded.

Set pixel_kill_operation to WEAK_EARLY to match the blob.

Reviewed-and-tested-by: Alyssa Rosenzweig <[email protected]>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/8235>

---

 src/gallium/drivers/panfrost/pan_assemble.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/gallium/drivers/panfrost/pan_assemble.c 
b/src/gallium/drivers/panfrost/pan_assemble.c
index fc645dcd953..48dcd0fe3d5 100644
--- a/src/gallium/drivers/panfrost/pan_assemble.c
+++ b/src/gallium/drivers/panfrost/pan_assemble.c
@@ -82,6 +82,9 @@ pan_prepare_bifrost_props(struct panfrost_shader_state *state,
                 if (state->writes_depth || state->writes_stencil) {
                         state->properties.bifrost.zs_update_operation = 
MALI_PIXEL_KILL_FORCE_LATE;
                         state->properties.bifrost.pixel_kill_operation = 
MALI_PIXEL_KILL_FORCE_LATE;
+                } else if (state->can_discard) {
+                        state->properties.bifrost.zs_update_operation = 
MALI_PIXEL_KILL_FORCE_LATE;
+                        state->properties.bifrost.pixel_kill_operation = 
MALI_PIXEL_KILL_WEAK_EARLY;
                 } else {
                         state->properties.bifrost.zs_update_operation = 
MALI_PIXEL_KILL_STRONG_EARLY;
                         state->properties.bifrost.pixel_kill_operation = 
MALI_PIXEL_KILL_FORCE_EARLY;

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