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>

diff --git a/src/gallium/drivers/r600/evergreen_state.c b/src/gallium/drivers/r600/evergreen_state.c
index c6702a9..96c6b11 100644 (file)
--- 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 (file)
--- 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 (file)
--- 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 (file)
--- 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 (file)
--- 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 (file)
--- 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)