Supported on R700 and up.
Signed-off-by: Glenn Kennard <glenn.kenn...@gmail.com>
---
Not exactly a commonly used extension, but might as well set the
hardware registers rather than just dropping the hint on the floor.
src/gallium/drivers/r600/evergreen_state.c | 13 +++++++++++++
src/gallium/drivers/r600/evergreend.h | 7 +++++++
src/gallium/drivers/r600/r600_shader.c | 1 +
src/gallium/drivers/r600/r600_shader.h | 2 ++
src/gallium/drivers/r600/r600_state.c | 15 +++++++++++++++
src/gallium/drivers/r600/r600d.h | 8 ++++++++
6 files changed, 46 insertions(+)
diff --git a/src/gallium/drivers/r600/evergreen_state.c
b/src/gallium/drivers/r600/evergreen_state.c
index c6702a9..96c6b11 100644
--- a/src/gallium/drivers/r600/evergreen_state.c
+++ b/src/gallium/drivers/r600/evergreen_state.c
@@ -2940,6 +2940,19 @@ void evergreen_update_ps_state(struct pipe_context *ctx,
struct r600_pipe_shader
db_shader_control |= S_02880C_STENCIL_EXPORT_ENABLE(stencil_export);
db_shader_control |= S_02880C_MASK_EXPORT_ENABLE(mask_export);
+ switch (rshader->ps_conservative_z) {
+ default: /* fall through */
+ case TGSI_FS_DEPTH_LAYOUT_ANY:
+ db_shader_control |=
S_02880C_CONSERVATIVE_Z_EXPORT(V_02880C_EXPORT_ANY_Z);
+ break;
+ case TGSI_FS_DEPTH_LAYOUT_GREATER:
+ db_shader_control |=
S_02880C_CONSERVATIVE_Z_EXPORT(V_02880C_EXPORT_GREATER_THAN_Z);
+ break;
+ case TGSI_FS_DEPTH_LAYOUT_LESS:
+ db_shader_control |=
S_02880C_CONSERVATIVE_Z_EXPORT(V_02880C_EXPORT_LESS_THAN_Z);
+ break;
+ }
+
exports_ps = 0;
for (i = 0; i < rshader->noutput; i++) {
if (rshader->output[i].name == TGSI_SEMANTIC_POSITION ||
diff --git a/src/gallium/drivers/r600/evergreend.h
b/src/gallium/drivers/r600/evergreend.h
index 937ffcb..a9a65f7 100644
--- a/src/gallium/drivers/r600/evergreend.h
+++ b/src/gallium/drivers/r600/evergreend.h
@@ -815,6 +815,13 @@
#define V_02880C_EXPORT_DB_FOUR16 0x01
#define V_02880C_EXPORT_DB_TWO 0x02
#define S_02880C_ALPHA_TO_MASK_DISABLE(x) (((x) & 0x1) << 12)
+#define S_02880C_CONSERVATIVE_Z_EXPORT(x) (((x) & 0x03) << 16)
+#define G_02880C_CONSERVATIVE_Z_EXPORT(x) (((x) >> 16) & 0x03)
+#define C_02880C_CONSERVATIVE_Z_EXPORT 0xFFFCFFFF
+#define V_02880C_EXPORT_ANY_Z 0
+#define V_02880C_EXPORT_LESS_THAN_Z 1
+#define V_02880C_EXPORT_GREATER_THAN_Z 2
+#define V_02880C_EXPORT_RESERVED 3
#define R_028A00_PA_SU_POINT_SIZE 0x028A00
#define S_028A00_HEIGHT(x) (((x) & 0xFFFF) << 0)
diff --git a/src/gallium/drivers/r600/r600_shader.c
b/src/gallium/drivers/r600/r600_shader.c
index 8efe902..560696d 100644
--- a/src/gallium/drivers/r600/r600_shader.c
+++ b/src/gallium/drivers/r600/r600_shader.c
@@ -2048,6 +2048,7 @@ static int r600_shader_from_tgsi(struct r600_context
*rctx,
shader->fs_write_all =
ctx.info.properties[TGSI_PROPERTY_FS_COLOR0_WRITES_ALL_CBUFS];
shader->vs_position_window_space =
ctx.info.properties[TGSI_PROPERTY_VS_WINDOW_SPACE_POSITION];
+ shader->ps_conservative_z =
ctx.info.properties[TGSI_PROPERTY_FS_DEPTH_LAYOUT];
if (shader->vs_as_gs_a)
vs_add_primid_output(&ctx, key.vs.prim_id_out);
diff --git a/src/gallium/drivers/r600/r600_shader.h
b/src/gallium/drivers/r600/r600_shader.h
index c240e71..e085263 100644
--- a/src/gallium/drivers/r600/r600_shader.h
+++ b/src/gallium/drivers/r600/r600_shader.h
@@ -76,6 +76,8 @@ struct r600_shader {
boolean uses_tex_buffers;
boolean gs_prim_id_input;
+ unsigned ps_conservative_z;
+
/* Size in bytes of a data item in the ring(s) (single vertex data).
Stages with only one ring items 123 will be set to 0. */
unsigned ring_item_sizes[4];
diff --git a/src/gallium/drivers/r600/r600_state.c
b/src/gallium/drivers/r600/r600_state.c
index 1be3e1b..09b2325 100644
--- a/src/gallium/drivers/r600/r600_state.c
+++ b/src/gallium/drivers/r600/r600_state.c
@@ -2533,6 +2533,21 @@ void r600_update_ps_state(struct pipe_context *ctx,
struct r600_pipe_shader *sha
if (rshader->uses_kill)
db_shader_control |= S_02880C_KILL_ENABLE(1);
+ if (rctx->b.chip_class >= R700) {
+ switch (rshader->ps_conservative_z) {
+ default: /* fall through */
+ case TGSI_FS_DEPTH_LAYOUT_ANY:
+ db_shader_control |=
S_02880C_CONSERVATIVE_Z_EXPORT(V_02880C_EXPORT_ANY_Z);
+ break;
+ case TGSI_FS_DEPTH_LAYOUT_GREATER:
+ db_shader_control |=
S_02880C_CONSERVATIVE_Z_EXPORT(V_02880C_EXPORT_GREATER_THAN_Z);
+ break;
+ case TGSI_FS_DEPTH_LAYOUT_LESS:
+ db_shader_control |=
S_02880C_CONSERVATIVE_Z_EXPORT(V_02880C_EXPORT_LESS_THAN_Z);
+ break;
+ }
+ }
+
exports_ps = 0;
for (i = 0; i < rshader->noutput; i++) {
if (rshader->output[i].name == TGSI_SEMANTIC_POSITION ||
diff --git a/src/gallium/drivers/r600/r600d.h b/src/gallium/drivers/r600/r600d.h
index 6bba88c..06c4356 100644
--- a/src/gallium/drivers/r600/r600d.h
+++ b/src/gallium/drivers/r600/r600d.h
@@ -853,6 +853,14 @@
#define S_02880C_DUAL_EXPORT_ENABLE(x) (((x) & 0x1) << 9)
#define G_02880C_DUAL_EXPORT_ENABLE(x) (((x) >> 9) & 0x1)
#define C_02880C_DUAL_EXPORT_ENABLE 0xFFFFFDFF
+#define S_02880C_CONSERVATIVE_Z_EXPORT(x) (((x) & 0x03) << 13)
+#define G_02880C_CONSERVATIVE_Z_EXPORT(x) (((x) >> 13) & 0x03)
+#define C_02880C_CONSERVATIVE_Z_EXPORT 0xFFFF9FFF
+#define V_02880C_EXPORT_ANY_Z 0
+#define V_02880C_EXPORT_LESS_THAN_Z 1
+#define V_02880C_EXPORT_GREATER_THAN_Z 2
+#define V_02880C_EXPORT_RESERVED 3
+
#define R_028DF8_PA_SU_POLY_OFFSET_DB_FMT_CNTL 0x028DF8
#define S_028DF8_POLY_OFFSET_NEG_NUM_DB_BITS(x) (((x) & 0xFF) << 0)
#define G_028DF8_POLY_OFFSET_NEG_NUM_DB_BITS(x) (((x) >> 0) & 0xFF)
--
1.9.1
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