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authorDanylo Piliaiev <[email protected]>2019-08-01 13:57:14 +0300
committerJason Ekstrand <[email protected]>2019-08-08 13:39:15 +0000
commitb8842bc3128a255677a1a8ea5207df46f8e54a04 (patch)
treecce70187d7af24768bc3866b0fdcf99c174ed5ed /src/mesa
parent23a9d20997517dfff7f35e3a6c2b954564f0f6c4 (diff)
i965: Emit a dummy MEDIA_VFE_STATE before switching from GPGPU to 3D
There is an object-level preemption workaround which requires this. However, even without object-level preemption, we seem to have issues with geometry flickering when 3D and compute are combined in the same batch and this appears to fix it. Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=110395 Suggested-by: Jason Ekstrand <[email protected]> Signed-off-by: Danylo Piliaiev <[email protected]> Reviewed-by: Kenneth Graunke <[email protected]> Cc: [email protected]
Diffstat (limited to 'src/mesa')
-rw-r--r--src/mesa/drivers/dri/i965/brw_misc_state.c21
1 files changed, 21 insertions, 0 deletions
diff --git a/src/mesa/drivers/dri/i965/brw_misc_state.c b/src/mesa/drivers/dri/i965/brw_misc_state.c
index b752294250e..e73cadc5d3e 100644
--- a/src/mesa/drivers/dri/i965/brw_misc_state.c
+++ b/src/mesa/drivers/dri/i965/brw_misc_state.c
@@ -493,6 +493,27 @@ brw_emit_select_pipeline(struct brw_context *brw, enum brw_pipeline pipeline)
}
}
+ if (devinfo->gen == 9 && pipeline == BRW_RENDER_PIPELINE) {
+ /* We seem to have issues with geometry flickering when 3D and compute
+ * are combined in the same batch and this appears to fix it.
+ */
+ const uint32_t subslices = MAX2(brw->screen->subslice_total, 1);
+ const uint32_t maxNumberofThreads =
+ devinfo->max_cs_threads * subslices - 1;
+
+ BEGIN_BATCH(9);
+ OUT_BATCH(MEDIA_VFE_STATE << 16 | (9 - 2));
+ OUT_BATCH(0);
+ OUT_BATCH(0);
+ OUT_BATCH(2 << 8 | maxNumberofThreads << 16);
+ OUT_BATCH(0);
+ OUT_BATCH(2 << 16);
+ OUT_BATCH(0);
+ OUT_BATCH(0);
+ OUT_BATCH(0);
+ ADVANCE_BATCH();
+ }
+
if (devinfo->gen >= 6) {
/* From "BXML » GT » MI » vol1a GPU Overview » [Instruction]
* PIPELINE_SELECT [DevBWR+]":