From c4c78c275abffe8d1014b1355f02239859d6aa2b Mon Sep 17 00:00:00 2001 From: Kenneth Graunke Date: Tue, 7 Aug 2012 09:13:04 -0700 Subject: [PATCH] i965: Use 64-bit writes for timestamp queries. The hardware seems to use the length of the PIPE_CONTROL command to indicate whether the write is 64-bits or 32-bits. Which makes sense for immediate writes. Daniel discovered this by writing a pattern into the query object bo and noticing that the high 32-bits were left intact, even on those pipe control writes that seemingly worked. Signed-off-by: Daniel Vetter Signed-off-by: Kenneth Graunke Reviewed-by: Daniel Vetter Reviewed-by: Eric Anholt --- src/mesa/drivers/dri/i965/brw_queryobj.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/src/mesa/drivers/dri/i965/brw_queryobj.c b/src/mesa/drivers/dri/i965/brw_queryobj.c index 229aeb7..afa3091 100644 --- a/src/mesa/drivers/dri/i965/brw_queryobj.c +++ b/src/mesa/drivers/dri/i965/brw_queryobj.c @@ -49,14 +49,15 @@ static void write_timestamp(struct intel_context *intel, drm_intel_bo *query_bo, int idx) { if (intel->gen >= 6) { - BEGIN_BATCH(4); - OUT_BATCH(_3DSTATE_PIPE_CONTROL | (4 - 2)); + BEGIN_BATCH(5); + OUT_BATCH(_3DSTATE_PIPE_CONTROL | (5 - 2)); OUT_BATCH(PIPE_CONTROL_WRITE_TIMESTAMP); OUT_RELOC(query_bo, I915_GEM_DOMAIN_INSTRUCTION, I915_GEM_DOMAIN_INSTRUCTION, PIPE_CONTROL_GLOBAL_GTT_WRITE | idx * sizeof(uint64_t)); OUT_BATCH(0); + OUT_BATCH(0); ADVANCE_BATCH(); } else { BEGIN_BATCH(4); -- 2.7.4