diff options
| author | Paul Berry <stereotype441@gmail.com> | 2013-11-04 20:06:48 -0800 |
|---|---|---|
| committer | Paul Berry <stereotype441@gmail.com> | 2013-11-18 10:09:11 -0800 |
| commit | 7dfb4b2d00ddb8e5ee24d4c58eb9415dc4ccc21c (patch) | |
| tree | 79601460f1cdc347b8c9f9e957f2e56a67da7bf2 /src/mesa/drivers/dri/i965/gen7_blorp.cpp | |
| parent | d22220219347689c51134e4a5650d75143748017 (diff) | |
i965/gen7: Emit workaround flush when changing GS enable state.
v2: Don't go to extra work to avoid extraneous flushes. (Previous
experiments in the kernel have suggested that flushing the pipeline
when it is already empty is extremely cheap).
Cc: "10.0" <mesa-stable@lists.freedesktop.org>
Reviewed-by: Eric Anholt <eric@anholt.net>
Diffstat (limited to 'src/mesa/drivers/dri/i965/gen7_blorp.cpp')
| -rw-r--r-- | src/mesa/drivers/dri/i965/gen7_blorp.cpp | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/src/mesa/drivers/dri/i965/gen7_blorp.cpp b/src/mesa/drivers/dri/i965/gen7_blorp.cpp index 540c46dcb40..d48153824de 100644 --- a/src/mesa/drivers/dri/i965/gen7_blorp.cpp +++ b/src/mesa/drivers/dri/i965/gen7_blorp.cpp @@ -402,6 +402,21 @@ gen7_blorp_emit_gs_disable(struct brw_context *brw, OUT_BATCH(0); ADVANCE_BATCH(); + /** + * From Graphics BSpec: 3D-Media-GPGPU Engine > 3D Pipeline Stages > + * Geometry > Geometry Shader > State: + * + * "Note: Because of corruption in IVB:GT2, software needs to flush the + * whole fixed function pipeline when the GS enable changes value in + * the 3DSTATE_GS." + * + * The hardware architects have clarified that in this context "flush the + * whole fixed function pipeline" means to emit a PIPE_CONTROL with the "CS + * Stall" bit set. + */ + if (!brw->is_haswell && brw->gt == 2 && brw->gs.enabled) + gen7_emit_cs_stall_flush(brw); + BEGIN_BATCH(7); OUT_BATCH(_3DSTATE_GS << 16 | (7 - 2)); OUT_BATCH(0); @@ -411,6 +426,7 @@ gen7_blorp_emit_gs_disable(struct brw_context *brw, OUT_BATCH(0); OUT_BATCH(0); ADVANCE_BATCH(); + brw->gs.enabled = false; } /* 3DSTATE_STREAMOUT |