src/mesa/drivers/dri/i965/gen8_ds_state.c

   1 /*
   2  * Copyright © 2014 Intel Corporation
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  21  * DEALINGS IN THE SOFTWARE.
  22  */
  23
  24 #include "brw_context.h"
  25 #include "brw_state.h"
  26 #include "brw_defines.h"
  27 #include "intel_batchbuffer.h"
  28
  29 static void
  30 gen8_upload_ds_state(struct brw_context *brw)
  31 {
  32    /* Disable the DS Unit */
  33    int ds_pkt_len = brw->gen >= 9 ? 11 : 9;
  34    BEGIN_BATCH(ds_pkt_len);
  35    OUT_BATCH(_3DSTATE_DS << 16 | (ds_pkt_len - 2));
  36    for (int i = 0; i < ds_pkt_len - 1; i++)
  37       OUT_BATCH(0);
  38    ADVANCE_BATCH();
  39 }
  40
  41 const struct brw_tracked_state gen8_ds_state = {
  42    .dirty = {
  43       .mesa  = 0,
  44       .brw   = BRW_NEW_CONTEXT,
  45    },
  46    .emit = gen8_upload_ds_state,
  47 };