From: Marek Olšák <[email protected]>
---
src/gallium/drivers/radeonsi/si_shader.h | 4 ++++
src/gallium/drivers/radeonsi/si_state_shaders.c | 12 ++++++++++++
2 files changed, 16 insertions(+)
diff --git a/src/gallium/drivers/radeonsi/si_shader.h
b/src/gallium/drivers/radeonsi/si_shader.h
index f49290a..50375e2 100644
--- a/src/gallium/drivers/radeonsi/si_shader.h
+++ b/src/gallium/drivers/radeonsi/si_shader.h
@@ -213,6 +213,10 @@ struct si_shader_selector {
/* PS parameters. */
unsigned db_shader_control;
+ /* Set 0xf or 0x0 (4 bits) per each written output.
+ * ANDed with spi_shader_col_format.
+ */
+ unsigned colors_written_4bit;
/* masks of "get_unique_index" bits */
uint64_t outputs_written;
diff --git a/src/gallium/drivers/radeonsi/si_state_shaders.c
b/src/gallium/drivers/radeonsi/si_state_shaders.c
index 80126f2..9daa924 100644
--- a/src/gallium/drivers/radeonsi/si_state_shaders.c
+++ b/src/gallium/drivers/radeonsi/si_state_shaders.c
@@ -646,6 +646,12 @@ static inline void si_shader_selector_key(struct
pipe_context *ctx,
if (sctx->b.chip_class <= CIK && sctx->b.family != CHIP_HAWAII)
key->ps.color_is_int8 = sctx->framebuffer.color_is_int8;
+ /* Disable unwritten outputs (if WRITE_ALL_CBUFS isn't
enabled). */
+ if (!key->ps.last_cbuf) {
+ key->ps.spi_shader_col_format &=
sel->colors_written_4bit;
+ key->ps.color_is_int8 &= sel->info.colors_written;
+ }
+
if (rs) {
bool is_poly = (sctx->current_rast_prim >=
PIPE_PRIM_TRIANGLES &&
sctx->current_rast_prim <=
PIPE_PRIM_POLYGON) ||
@@ -830,6 +836,12 @@ static void *si_create_shader_selector(struct pipe_context
*ctx,
}
sel->esgs_itemsize = util_last_bit64(sel->outputs_written) * 16;
break;
+
+ case PIPE_SHADER_FRAGMENT:
+ for (i = 0; i < 8; i++)
+ if (sel->info.colors_written & (1 << i))
+ sel->colors_written_4bit |= 0xf << (4 * i);
+ break;
}
/* DB_SHADER_CONTROL */
--
2.1.4
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