Mesa (master): iris: implement another workaround for non pipelined states

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Module: Mesa
Branch: master
Commit: 9eca823cce84d7b055714ebda303f7e299a680d5
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=9eca823cce84d7b055714ebda303f7e299a680d5

Author: Lionel Landwerlin <lionel.g.landwerlin at intel.com>
Date:   Wed Jan 15 15:14:10 2020 +0200

iris: implement another workaround for non pipelined states

v2: add comment (Ken)

Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin at intel.com>
Reviewed-by: Kenneth Graunke <kenneth at whitecape.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3408>

---

 src/gallium/drivers/iris/iris_state.c | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/src/gallium/drivers/iris/iris_state.c b/src/gallium/drivers/iris/iris_state.c
index e872b14cf18..7ead920cadf 100644
--- a/src/gallium/drivers/iris/iris_state.c
+++ b/src/gallium/drivers/iris/iris_state.c
@@ -387,6 +387,8 @@ emit_state(struct iris_batch *batch,
 static void
 flush_before_state_base_change(struct iris_batch *batch)
 {
+   const struct gen_device_info *devinfo = &batch->screen->devinfo;
+
    /* Flush before emitting STATE_BASE_ADDRESS.
     *
     * This isn't documented anywhere in the PRM.  However, it seems to be
@@ -412,7 +414,18 @@ flush_before_state_base_change(struct iris_batch *batch)
                               "change STATE_BASE_ADDRESS (flushes)",
                               PIPE_CONTROL_RENDER_TARGET_FLUSH |
                               PIPE_CONTROL_DEPTH_CACHE_FLUSH |
-                              PIPE_CONTROL_DATA_CACHE_FLUSH);
+                              PIPE_CONTROL_DATA_CACHE_FLUSH |
+                              /* GEN:BUG:1606662791:
+                               *
+                               *   Software must program PIPE_CONTROL command
+                               *   with "HDC Pipeline Flush" prior to
+                               *   programming of the below two non-pipeline
+                               *   state :
+                               *      * STATE_BASE_ADDRESS
+                               *      * 3DSTATE_BINDING_TABLE_POOL_ALLOC
+                               */
+                              ((GEN_GEN == 12 && devinfo->revision == 0 /* A0 */ ?
+                                PIPE_CONTROL_FLUSH_HDC : 0)));
 }
 
 static void