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-rw-r--r--src/gallium/drivers/radeonsi/si_state.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/src/gallium/drivers/radeonsi/si_state.c b/src/gallium/drivers/radeonsi/si_state.c
index 5caa921..53f860d 100644
--- a/src/gallium/drivers/radeonsi/si_state.c
+++ b/src/gallium/drivers/radeonsi/si_state.c
@@ -454,6 +454,10 @@ static void *si_create_blend_state_mode(struct pipe_context *ctx,
/* Only set dual source blending for MRT0 to avoid a hang. */
if (i >= 1 && blend->dual_src_blend) {
+ /* Vulkan does this for dual source blending. */
+ if (i == 1)
+ blend_cntl |= S_028780_ENABLE(1);
+
si_pm4_set_reg(pm4, R_028780_CB_BLEND0_CONTROL + i * 4, blend_cntl);
continue;
}