intel: Add a batch flush between front-buffer downsample and X protocol.

[mesa.git] / src / mesa / drivers / dri / i965 / gen6_vs_state.c

diff --git a/src/mesa/drivers/dri/i965/gen6_vs_state.c b/src/mesa/drivers/dri/i965/gen6_vs_state.c
index 7c459b4071911d46cc6d623c8b819e3607cee7c6..c5f2fd03a504847d16f45b623b4d8b406ce12156 100644 (file)
--- a/src/mesa/drivers/dri/i965/gen6_vs_state.c
+++ b/src/mesa/drivers/dri/i965/gen6_vs_state.c
@@ -101,12 +101,16 @@ upload_vs_state(struct brw_context *brw)
    struct gl_context *ctx = &brw->ctx;
    uint32_t floating_point_mode = 0;
 
-   /* From the BSpec, Volume 2a, Part 3 "Vertex Shader", Section
+   /* From the BSpec, 3D Pipeline > Geometry > Vertex Shader > State,
     * 3DSTATE_VS, Dword 5.0 "VS Function Enable":
+    *
     *   [DevSNB] A pipeline flush must be programmed prior to a 3DSTATE_VS
     *   command that causes the VS Function Enable to toggle. Pipeline
     *   flush can be executed by sending a PIPE_CONTROL command with CS
     *   stall bit set and a post sync operation.
+    *
+    * Although we don't disable the VS during normal drawing, BLORP sometimes
+    * disables it.  To be safe, do the flush here just in case.
     */
    intel_emit_post_sync_nonzero_flush(brw);
 
@@ -145,7 +149,7 @@ upload_vs_state(struct brw_context *brw)
    OUT_BATCH(_3DSTATE_VS << 16 | (6 - 2));
    OUT_BATCH(brw->vs.prog_offset);
    OUT_BATCH(floating_point_mode |
-            ((ALIGN(brw->sampler.count, 4)/4) << GEN6_VS_SAMPLER_COUNT_SHIFT));
+            ((ALIGN(brw->vs.sampler_count, 4)/4) << GEN6_VS_SAMPLER_COUNT_SHIFT));
 
    if (brw->vs.prog_data->base.total_scratch) {
       OUT_RELOC(brw->vs.scratch_bo,
@@ -155,7 +159,8 @@ upload_vs_state(struct brw_context *brw)
       OUT_BATCH(0);
    }
 
-   OUT_BATCH((1 << GEN6_VS_DISPATCH_START_GRF_SHIFT) |
+   OUT_BATCH((brw->vs.prog_data->base.dispatch_grf_start_reg <<
+              GEN6_VS_DISPATCH_START_GRF_SHIFT) |
             (brw->vs.prog_data->base.urb_read_length << GEN6_VS_URB_READ_LENGTH_SHIFT) |
             (0 << GEN6_VS_URB_ENTRY_READ_OFFSET_SHIFT));