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broadcom/compiler: track passthrough Z writes

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In some cases we need to make the shaders write the Z value produced
from rasterization (FEP). Track these instances because they are relevant
to early EZ setup.

Reviewed-by: Alejandro Piñeiro <apinheiro@igalia.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/14037>
This commit is contained in:
Iago Toral Quiroga
2021-12-03 10:22:45 +01:00
committed by Marge Bot
parent 6d4a645c90
commit a65c605365
3 changed files with 4 additions and 0 deletions
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1
src/broadcom/compiler/nir_to_vir.c
View File

@@ -1741,6 +1741,7 @@ emit_frag_end(struct v3d_compile *c)
/* Shader doesn't write to gl_FragDepth, take Z from /* Shader doesn't write to gl_FragDepth, take Z from
* FEP. * FEP.
*/ */
c->writes_z_from_fep = true;
inst = vir_MOV_dest(c, tlbu_reg, vir_nop_reg()); inst = vir_MOV_dest(c, tlbu_reg, vir_nop_reg());
if (c->devinfo->ver >= 42) { if (c->devinfo->ver >= 42) {

2
src/broadcom/compiler/v3d_compiler.h
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@@ -655,6 +655,7 @@ struct v3d_compile {
bool uses_center_w; bool uses_center_w;
bool writes_z; bool writes_z;
bool writes_z_from_fep;
bool reads_z; bool reads_z;
bool uses_implicit_point_line_varyings; bool uses_implicit_point_line_varyings;
@@ -968,6 +969,7 @@ struct v3d_fs_prog_data {
uint8_t num_inputs; uint8_t num_inputs;
bool writes_z; bool writes_z;
bool writes_z_from_fep;
bool disable_ez; bool disable_ez;
bool uses_center_w; bool uses_center_w;
bool uses_implicit_point_line_varyings; bool uses_implicit_point_line_varyings;

1
src/broadcom/compiler/vir.c
View File

@@ -807,6 +807,7 @@ v3d_fs_set_prog_data(struct v3d_compile *c,
{ {
v3d_set_fs_prog_data_inputs(c, prog_data); v3d_set_fs_prog_data_inputs(c, prog_data);
prog_data->writes_z = c->writes_z; prog_data->writes_z = c->writes_z;
prog_data->writes_z_from_fep = c->writes_z_from_fep;
prog_data->disable_ez = !c->s->info.fs.early_fragment_tests; prog_data->disable_ez = !c->s->info.fs.early_fragment_tests;
prog_data->uses_center_w = c->uses_center_w; prog_data->uses_center_w = c->uses_center_w;
prog_data->uses_implicit_point_line_varyings = prog_data->uses_implicit_point_line_varyings =