diff options
Diffstat (limited to 'src/mesa/drivers/dri/i965/brw_vs_state.c')
| -rw-r--r-- | src/mesa/drivers/dri/i965/brw_vs_state.c | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/src/mesa/drivers/dri/i965/brw_vs_state.c b/src/mesa/drivers/dri/i965/brw_vs_state.c index 6e66f54524b..942581696d8 100644 --- a/src/mesa/drivers/dri/i965/brw_vs_state.c +++ b/src/mesa/drivers/dri/i965/brw_vs_state.c @@ -77,12 +77,19 @@ vs_unit_create_from_key(struct brw_context *brw, struct brw_vs_unit_key *key) { struct brw_vs_unit_state vs; dri_bo *bo; + int chipset_max_threads; memset(&vs, 0, sizeof(vs)); vs.thread0.kernel_start_pointer = brw->vs.prog_bo->offset >> 6; /* reloc */ vs.thread0.grf_reg_count = ALIGN(key->total_grf, 16) / 16 - 1; vs.thread1.floating_point_mode = BRW_FLOATING_POINT_NON_IEEE_754; + /* Choosing multiple program flow means that we may get 2-vertex threads, + * which will have the channel mask for dwords 4-7 enabled in the thread, + * and those dwords will be written to the second URB handle when we + * brw_urb_WRITE() results. + */ + vs.thread1.single_program_flow = 0; vs.thread3.urb_entry_read_length = key->urb_entry_read_length; vs.thread3.const_urb_entry_read_length = key->curb_entry_read_length; vs.thread3.dispatch_grf_start_reg = 1; @@ -91,8 +98,13 @@ vs_unit_create_from_key(struct brw_context *brw, struct brw_vs_unit_key *key) vs.thread4.nr_urb_entries = key->nr_urb_entries; vs.thread4.urb_entry_allocation_size = key->urb_size - 1; - vs.thread4.max_threads = MIN2(MAX2(0, (key->nr_urb_entries - 6) / 2 - 1), - 15); + + if (BRW_IS_G4X(brw)) + chipset_max_threads = 32; + else + chipset_max_threads = 16; + vs.thread4.max_threads = CLAMP(key->nr_urb_entries / 2, + 1, chipset_max_threads) - 1; if (INTEL_DEBUG & DEBUG_SINGLE_THREAD) vs.thread4.max_threads = 0; |