Mesa (master): iris/gen11+: Move flush for render target change

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Module: Mesa
Branch: master
Commit: bb0c5c487e63e88acbb792f092dd8f392bad8540
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=bb0c5c487e63e88acbb792f092dd8f392bad8540

Author: Jordan Justen <jordan.l.justen at intel.com>
Date:   Fri Feb 15 11:35:28 2019 -0800

iris/gen11+: Move flush for render target change

When starting a BLORP operation, we do the BTI-change flush.  However,
when ending it and transitioning back to regular drawing, we change the
render target again - without a set_framebuffer_state() call.  We need
to do the BTI flush there too.  BLORP flags IRIS_DIRTY_RENDER_BUFFER
now, which will cause the next draw to get the BTI flush again.

(explanation of fix by Ken)

Fixes: 2b956a093a1 ("iris: totally untested icelake support")
Signed-off-by: Jordan Justen <jordan.l.justen at intel.com>
Reviewed-by: Kenneth Graunke <kenneth at whitecape.org>

---

 src/gallium/drivers/iris/iris_state.c | 39 ++++++++++++++++++-----------------
 1 file changed, 20 insertions(+), 19 deletions(-)

diff --git a/src/gallium/drivers/iris/iris_state.c b/src/gallium/drivers/iris/iris_state.c
index da181b187a1..da4ea2cc38d 100644
--- a/src/gallium/drivers/iris/iris_state.c
+++ b/src/gallium/drivers/iris/iris_state.c
@@ -3023,31 +3023,14 @@ iris_set_framebuffer_state(struct pipe_context *ctx,
    /* Render target change */
    ice->state.dirty |= IRIS_DIRTY_BINDINGS_FS;
 
+   ice->state.dirty |= IRIS_DIRTY_RENDER_BUFFER;
+
    ice->state.dirty |= IRIS_DIRTY_RENDER_RESOLVES_AND_FLUSHES;
 
    ice->state.dirty |= ice->state.dirty_for_nos[IRIS_NOS_FRAMEBUFFER];
 
    if (GEN_GEN == 8)
       ice->state.dirty |= IRIS_DIRTY_PMA_FIX;
-
-#if GEN_GEN == 11
-   // XXX: we may want to flag IRIS_DIRTY_MULTISAMPLE (or SAMPLE_MASK?)
-   // XXX: see commit 979fc1bc9bcc64027ff2cfafd285676f31b930a6
-
-   /* The PIPE_CONTROL command description says:
-    *
-    *   "Whenever a Binding Table Index (BTI) used by a Render Target Message
-    *    points to a different RENDER_SURFACE_STATE, SW must issue a Render
-    *    Target Cache Flush by enabling this bit. When render target flush
-    *    is set due to new association of BTI, PS Scoreboard Stall bit must
-    *    be set in this packet."
-    */
-   // XXX: does this need to happen at 3DSTATE_BTP_PS time?
-   iris_emit_pipe_control_flush(&ice->batches[IRIS_BATCH_RENDER],
-                                "workaround: RT BTI change [draw]",
-                                PIPE_CONTROL_RENDER_TARGET_FLUSH |
-                                PIPE_CONTROL_STALL_AT_SCOREBOARD);
-#endif
 }
 
 /**
@@ -5297,6 +5280,24 @@ iris_upload_dirty_render_state(struct iris_context *ice,
       }
    }
 
+   if (GEN_GEN >= 11 && (dirty & IRIS_DIRTY_RENDER_BUFFER)) {
+      // XXX: we may want to flag IRIS_DIRTY_MULTISAMPLE (or SAMPLE_MASK?)
+      // XXX: see commit 979fc1bc9bcc64027ff2cfafd285676f31b930a6
+
+      /* The PIPE_CONTROL command description says:
+       *
+       *   "Whenever a Binding Table Index (BTI) used by a Render Target
+       *    Message points to a different RENDER_SURFACE_STATE, SW must issue a
+       *    Render Target Cache Flush by enabling this bit. When render target
+       *    flush is set due to new association of BTI, PS Scoreboard Stall bit
+       *    must be set in this packet."
+       */
+      // XXX: does this need to happen at 3DSTATE_BTP_PS time?
+      iris_emit_pipe_control_flush(batch, "workaround: RT BTI change [draw]",
+                                   PIPE_CONTROL_RENDER_TARGET_FLUSH |
+                                   PIPE_CONTROL_STALL_AT_SCOREBOARD);
+   }
+
    for (int stage = 0; stage <= MESA_SHADER_FRAGMENT; stage++) {
       if (dirty & (IRIS_DIRTY_BINDINGS_VS << stage)) {
          iris_populate_binding_table(ice, batch, stage, false);