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radeonsi: take into account NULL colorbuffers when computing CB_TARGET_MASK

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Reviewed-by: Michel Dänzer <michel.daenzer@amd.com>
This commit is contained in:
Marek Olšák 2014-12-08 15:58:42 +01:00
parent 3291eedfe6
commit 15186607bb
1 changed files with 12 additions and 4 deletions
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16
src/gallium/drivers/radeonsi/si_state.c
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@ -210,13 +210,19 @@ static unsigned si_pack_float_12p4(float x)
} }
/* /*
* inferred framebuffer and blender state * Inferred framebuffer and blender state.
*
* One of the reasons this 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.
*/ */
static void si_update_fb_blend_state(struct si_context *sctx) static void si_update_fb_blend_state(struct si_context *sctx)
{ {
struct si_pm4_state *pm4; struct si_pm4_state *pm4;
struct si_state_blend *blend = sctx->queued.named.blend; struct si_state_blend *blend = sctx->queued.named.blend;
uint32_t mask; uint32_t mask = 0, i;
if (blend == NULL) if (blend == NULL)
return; return;
@ -225,10 +231,12 @@ static void si_update_fb_blend_state(struct si_context *sctx)
if (pm4 == NULL) if (pm4 == NULL)
return; return;
mask = (1ULL << ((unsigned)sctx->framebuffer.state.nr_cbufs * 4)) - 1; for (i = 0; i < sctx->framebuffer.state.nr_cbufs; i++)
if (sctx->framebuffer.state.cbufs[i])
mask |= 0xf << (4*i);
mask &= blend->cb_target_mask; mask &= blend->cb_target_mask;
si_pm4_set_reg(pm4, R_028238_CB_TARGET_MASK, mask);
si_pm4_set_reg(pm4, R_028238_CB_TARGET_MASK, mask);
si_pm4_set_state(sctx, fb_blend, pm4); si_pm4_set_state(sctx, fb_blend, pm4);
} }