Mesa (master): i965: Always set depth/stencil write enables on gen7+

[Jason Ekstrand]

Module: Mesa
Branch: master
Commit: 514bb6f41ec139baeaf56b57d7bc1034fb114234
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=514bb6f41ec139baeaf56b57d7bc1034fb114234

Author: Jason Ekstrand <jason.ekstrand at intel.com>
Date:   Mon May  7 10:57:49 2018 -0700

i965: Always set depth/stencil write enables on gen7+

The hardware will AND these fields with the corresponding fields in
DEPTH_STENCIL_STATE so there's no real reason to toggle them on and off
based on state bits.  This removes our reliance on the _NEW_DEPTH and
_NEW_STENCIL state bits and better matches what ISL does.

Reviewed-by: Kenneth Graunke <kenneth at whitecape.org>

---

 src/mesa/drivers/dri/i965/gen7_misc_state.c  | 8 +++-----
 src/mesa/drivers/dri/i965/gen8_depth_state.c | 9 +++------
 2 files changed, 6 insertions(+), 11 deletions(-)

diff --git a/src/mesa/drivers/dri/i965/gen7_misc_state.c b/src/mesa/drivers/dri/i965/gen7_misc_state.c
index e3a355fae3..42ab271e6a 100644
--- a/src/mesa/drivers/dri/i965/gen7_misc_state.c
+++ b/src/mesa/drivers/dri/i965/gen7_misc_state.c
@@ -109,8 +109,8 @@ gen7_emit_depth_stencil_hiz(struct brw_context *brw,
    OUT_BATCH((depth_mt ? depth_mt->surf.row_pitch - 1 : 0) |
              (depthbuffer_format << 18) |
              ((hiz ? 1 : 0) << 22) |
-             ((stencil_mt != NULL && brw->stencil_write_enabled) << 27) |
-             (brw_depth_writes_enabled(brw) << 28) |
+             ((stencil_mt != NULL) << 27) | /* Stencil Write Enable */
+             ((depth_mt != NULL) << 28) | /* Depth Write Enable */
              (surftype << 29));
 
    /* 3DSTATE_DEPTH_BUFFER dw2 */
@@ -192,9 +192,7 @@ gen7_emit_depth_stencil_hiz(struct brw_context *brw,
  */
 const struct brw_tracked_state gen7_depthbuffer = {
    .dirty = {
-      .mesa = _NEW_BUFFERS |
-              _NEW_DEPTH |
-              _NEW_STENCIL,
+      .mesa = _NEW_BUFFERS,
       .brw = BRW_NEW_AUX_STATE |
              BRW_NEW_BATCH |
              BRW_NEW_BLORP,
diff --git a/src/mesa/drivers/dri/i965/gen8_depth_state.c b/src/mesa/drivers/dri/i965/gen8_depth_state.c
index 1c77218d2b..a00e22a686 100644
--- a/src/mesa/drivers/dri/i965/gen8_depth_state.c
+++ b/src/mesa/drivers/dri/i965/gen8_depth_state.c
@@ -39,9 +39,7 @@ emit_depth_packets(struct brw_context *brw,
                    struct intel_mipmap_tree *depth_mt,
                    uint32_t depthbuffer_format,
                    uint32_t depth_surface_type,
-                   bool depth_writable,
                    struct intel_mipmap_tree *stencil_mt,
-                   bool stencil_writable,
                    bool hiz,
                    uint32_t width,
                    uint32_t height,
@@ -64,8 +62,8 @@ emit_depth_packets(struct brw_context *brw,
    BEGIN_BATCH(8);
    OUT_BATCH(GEN7_3DSTATE_DEPTH_BUFFER << 16 | (8 - 2));
    OUT_BATCH(depth_surface_type << 29 |
-             (depth_writable ? (1 << 28) : 0) |
-             (stencil_mt != NULL && stencil_writable) << 27 |
+             (depth_mt != NULL) << 28 | /* Depth Write Enable */
+             (stencil_mt != NULL) << 27 | /* Stencil Write Enable */
              (hiz ? 1 : 0) << 22 |
              depthbuffer_format << 18 |
              (depth_mt ? depth_mt->surf.row_pitch - 1 : 0));
@@ -204,8 +202,7 @@ gen8_emit_depth_stencil_hiz(struct brw_context *brw,
    }
 
    emit_depth_packets(brw, depth_mt, brw_depthbuffer_format(brw), surftype,
-                      brw_depth_writes_enabled(brw),
-                      stencil_mt, brw->stencil_write_enabled,
+                      stencil_mt,
                       hiz, width, height, depth, lod, min_array_element);
 }