From: Marek Olšák <marek.ol...@amd.com>
---
src/gallium/drivers/radeon/r600_buffer_common.c | 6 ++++--
src/gallium/drivers/radeon/r600_pipe_common.c | 1 +
src/gallium/drivers/radeon/r600_pipe_common.h | 1 +
3 files changed, 6 insertions(+), 2 deletions(-)
diff --git a/src/gallium/drivers/radeon/r600_buffer_common.c
b/src/gallium/drivers/radeon/r600_buffer_common.c
index fc5f6c2..d5ee188 100644
--- a/src/gallium/drivers/radeon/r600_buffer_common.c
+++ b/src/gallium/drivers/radeon/r600_buffer_common.c
@@ -111,7 +111,8 @@ bool r600_init_resource(struct r600_common_screen *rscreen,
switch (res->b.b.usage) {
case PIPE_USAGE_STREAM:
- flags = RADEON_FLAG_GTT_WC;
+ if (!(rscreen->debug_flags & DBG_NO_WC))
+ flags = RADEON_FLAG_GTT_WC;
/* fall through */
case PIPE_USAGE_STAGING:
/* Transfers are likely to occur more often with these
resources. */
@@ -133,7 +134,8 @@ bool r600_init_resource(struct r600_common_screen *rscreen,
default:
/* Not listing GTT here improves performance in some apps. */
res->domains = RADEON_DOMAIN_VRAM;
- flags |= RADEON_FLAG_GTT_WC;
+ if (!(rscreen->debug_flags & DBG_NO_WC))
+ flags |= RADEON_FLAG_GTT_WC;
break;
}
diff --git a/src/gallium/drivers/radeon/r600_pipe_common.c
b/src/gallium/drivers/radeon/r600_pipe_common.c
index 79b4b54..b12992d 100644
--- a/src/gallium/drivers/radeon/r600_pipe_common.c
+++ b/src/gallium/drivers/radeon/r600_pipe_common.c
@@ -351,6 +351,7 @@ static const struct debug_named_value
common_debug_options[] = {
{ "switch_on_eop", DBG_SWITCH_ON_EOP, "Program WD/IA to switch on
end-of-packet." },
{ "forcedma", DBG_FORCE_DMA, "Use asynchronous DMA for all operations
when possible." },
{ "precompile", DBG_PRECOMPILE, "Compile one shader variant at shader
creation." },
+ { "nowc", DBG_NO_WC, "Disable GTT write combining" },
DEBUG_NAMED_VALUE_END /* must be last */
};
diff --git a/src/gallium/drivers/radeon/r600_pipe_common.h
b/src/gallium/drivers/radeon/r600_pipe_common.h
index fbd2a21..01c4bd3 100644
--- a/src/gallium/drivers/radeon/r600_pipe_common.h
+++ b/src/gallium/drivers/radeon/r600_pipe_common.h
@@ -95,6 +95,7 @@
#define DBG_FORCE_DMA (1llu << 38)
#define DBG_PRECOMPILE (1llu << 39)
#define DBG_INFO (1llu << 40)
+#define DBG_NO_WC (1llu << 41)
#define R600_MAP_BUFFER_ALIGNMENT 64
--
2.1.4
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