diff options
| -rw-r--r-- | src/gallium/drivers/radeonsi/si_state.c | 21 |
1 files changed, 7 insertions, 14 deletions
diff --git a/src/gallium/drivers/radeonsi/si_state.c b/src/gallium/drivers/radeonsi/si_state.c index a44f977402a..8d9fe539922 100644 --- a/src/gallium/drivers/radeonsi/si_state.c +++ b/src/gallium/drivers/radeonsi/si_state.c @@ -88,27 +88,20 @@ static unsigned si_pack_float_12p4(float x) /* * Inferred framebuffer and blender state. * - * One of the reasons CB_TARGET_MASK must be derived from the framebuffer state - * is that: - * - The blend state mask is 0xf most of the time. - * - The COLOR1 format isn't INVALID because of possible dual-source blending, - * so COLOR1 is enabled pretty much all the time. - * So CB_TARGET_MASK is the only register that can disable COLOR1. - * - * Another reason is to avoid a hang with dual source blending. + * CB_TARGET_MASK is emitted here to avoid a hang with dual source blending + * if there is not enough PS outputs. */ static void si_emit_cb_render_state(struct si_context *sctx, struct r600_atom *atom) { struct radeon_winsys_cs *cs = sctx->b.gfx.cs; struct si_state_blend *blend = sctx->queued.named.blend; - uint32_t cb_target_mask = 0, i; - - for (i = 0; i < sctx->framebuffer.state.nr_cbufs; i++) - if (sctx->framebuffer.state.cbufs[i]) - cb_target_mask |= 0xf << (4*i); + uint32_t cb_target_mask, i; + /* CB_COLORn_INFO.FORMAT=INVALID disables empty colorbuffer slots. */ if (blend) - cb_target_mask &= blend->cb_target_mask; + cb_target_mask = blend->cb_target_mask; + else + cb_target_mask = 0xffffffff; /* Avoid a hang that happens when dual source blending is enabled * but there is not enough color outputs. This is undefined behavior, |