Mesa (master): r600g: always clear query memory

[Alex Deucher]

Module: Mesa
Branch: master
Commit: 7c1d4781920e34ad5419b4c5cf9d54ae14938844
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=7c1d4781920e34ad5419b4c5cf9d54ae14938844

Author: Alex Deucher <alexdeucher at gmail.com>
Date:   Tue Jun  7 16:44:40 2011 -0400

r600g: always clear query memory

According to the hw documentation, the driver needs to:
- allocate 128 bits for each possible DB
- clear the 128 bits for each possible DB
- write 1 to bits 127 and 63 for upper DBs that don't
exist on a particular asic

Previously we were only doing these steps if the
asic had less than the max possible DBs.

Signed-off-by: Alex Deucher <alexdeucher at gmail.com>

---

 src/gallium/winsys/r600/drm/r600_hw_context.c |    6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/gallium/winsys/r600/drm/r600_hw_context.c b/src/gallium/winsys/r600/drm/r600_hw_context.c
index cb244f2..2159d41 100644
--- a/src/gallium/winsys/r600/drm/r600_hw_context.c
+++ b/src/gallium/winsys/r600/drm/r600_hw_context.c
@@ -1667,7 +1667,7 @@ void r600_query_begin(struct r600_context *ctx, struct r600_query *query)
 	}
 
 	if (query->type == PIPE_QUERY_OCCLUSION_COUNTER &&
-	    num_backends > 0 && num_backends < ctx->max_db) {
+	    num_backends > 0) {
 		/* as per info on ZPASS the driver must set the unusued DB top bits */
 		u32 *results;
 		int i;
@@ -1675,7 +1675,7 @@ void r600_query_begin(struct r600_context *ctx, struct r600_query *query)
 		results = r600_bo_map(ctx->radeon, query->buffer, PB_USAGE_DONTBLOCK | PB_USAGE_CPU_WRITE, NULL);
 		if (results) {
 			memset(results + (query->num_results * 4), 0, ctx->max_db * 4 * 4);
-			
+
 			for (i = num_backends; i < ctx->max_db; i++) {
 				results[(i * 4)+1] = 0x80000000;
 				results[(i * 4)+3] = 0x80000000;
@@ -1683,7 +1683,7 @@ void r600_query_begin(struct r600_context *ctx, struct r600_query *query)
 			r600_bo_unmap(ctx->radeon, query->buffer);
 		}
 	}
-	
+
 	/* emit begin query */
 	if (query->type == PIPE_QUERY_TIME_ELAPSED) {
 		ctx->pm4[ctx->pm4_cdwords++] = PKT3(PKT3_EVENT_WRITE_EOP, 4, 0);