r600g: Pass conservative depth parameters to hw

Supported on R700 and up.

Signed-off-by: Glenn Kennard <glenn.kennard@gmail.com>
Reviewed-by: Marek Olšák <marek.olsak@amd.com>

6 files changed, 46 insertions, 0 deletions

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 fc6335a..101acd4 100644
--- a/src/gallium/drivers/r600/r600_shader.c
+++ b/src/gallium/drivers/r600/r600_shader.c
@@ -2044,6 +2044,7 @@ 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)