radeonsi: Fix hardware state for dual source blending
Set up CB_SHADER_MASK register according to pixel shader exports, and enable
some minimal state for colour buffer 1 in case dual source blending is used.
diff --git a/src/gallium/drivers/radeonsi/radeonsi_shader.c b/src/gallium/drivers/radeonsi/radeonsi_shader.c
index 484f7ec..3e023f8 100644
--- a/src/gallium/drivers/radeonsi/radeonsi_shader.c
+++ b/src/gallium/drivers/radeonsi/radeonsi_shader.c
@@ -461,6 +461,8 @@
else
si_shader_ctx->shader->spi_shader_col_format |=
V_028714_SPI_SHADER_32_ABGR << (4 * cbuf);
+
+ si_shader_ctx->shader->cb_shader_mask |= 0xf << (4 * cbuf);
}
}
@@ -806,6 +808,7 @@
si_shader_ctx->shader->spi_shader_col_format |=
V_028714_SPI_SHADER_32_ABGR;
+ si_shader_ctx->shader->cb_shader_mask |= S_02823C_OUTPUT0_ENABLE(0xf);
}
/* Specify whether the EXEC mask represents the valid mask */
@@ -830,6 +833,8 @@
si_shader_ctx->shader->spi_shader_col_format |=
si_shader_ctx->shader->spi_shader_col_format << 4;
+ si_shader_ctx->shader->cb_shader_mask |=
+ si_shader_ctx->shader->cb_shader_mask << 4;
}
last_args[3] = lp_build_const_int32(base->gallivm, V_008DFC_SQ_EXP_MRT);