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i965: Fix GPU hangs in the dummy fragment shader.

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The dummy FB write failed to specify EOT and a message length, causing
the GPU to hang.  Now we can enjoy "everyone's favorite color" again.

Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Eric Anholt <eric@anholt.net>
This commit is contained in:
Kenneth Graunke 2012-02-18 12:59:40 -08:00
parent 0342ffba1f
commit 393b42240f
1 changed files with 2 additions and 0 deletions
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src/mesa/drivers/dri/i965/brw_fs_visitor.cpp
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@ -1809,6 +1809,8 @@ fs_visitor::emit_dummy_fs()
fs_inst *write;
write = emit(FS_OPCODE_FB_WRITE, fs_reg(0), fs_reg(0));
write->base_mrf = 2;
write->mlen = 4;
write->eot = true;
}
/* The register location here is relative to the start of the URB