This stores the result of can_do_pipelined_register_writes() in the
context struct so we can find out later whether LRI can be used to
program the L3 configuration.
---
src/mesa/drivers/dri/i965/brw_context.h | 5 +++++
src/mesa/drivers/dri/i965/intel_extensions.c | 8 +++++---
2 files changed, 10 insertions(+), 3 deletions(-)
diff --git a/src/mesa/drivers/dri/i965/brw_context.h
b/src/mesa/drivers/dri/i965/brw_context.h
index 41ba769..25776c6 100644
--- a/src/mesa/drivers/dri/i965/brw_context.h
+++ b/src/mesa/drivers/dri/i965/brw_context.h
@@ -1194,6 +1194,11 @@ struct brw_context
bool use_resource_streamer;
/**
+ * Whether LRI can be used to write register values from the batch buffer.
+ */
+ bool can_do_pipelined_register_writes;
+
+ /**
* Some versions of Gen hardware don't do centroid interpolation correctly
* on unlit pixels, causing incorrect values for derivatives near triangle
* edges. Enabling this flag causes the fragment shader to use
diff --git a/src/mesa/drivers/dri/i965/intel_extensions.c
b/src/mesa/drivers/dri/i965/intel_extensions.c
index 3c764be..0164e6b 100644
--- a/src/mesa/drivers/dri/i965/intel_extensions.c
+++ b/src/mesa/drivers/dri/i965/intel_extensions.c
@@ -42,8 +42,8 @@
static bool
can_do_pipelined_register_writes(struct brw_context *brw)
{
- /* Supposedly, Broadwell just works. */
- if (brw->gen >= 8)
+ /* Supposedly Broadwell just works, and earlier gens are sloppy. */
+ if (brw->gen != 7)
return true;
static int result = -1;
@@ -318,6 +318,8 @@ intelInitExtensions(struct gl_context *ctx)
}
brw->predicate.supported = false;
+ brw->can_do_pipelined_register_writes =
+ can_do_pipelined_register_writes(brw);
if (brw->gen >= 7) {
ctx->Extensions.ARB_conservative_depth = true;
@@ -330,7 +332,7 @@ intelInitExtensions(struct gl_context *ctx)
ctx->Extensions.ARB_texture_compression_bptc = true;
ctx->Extensions.ARB_texture_view = true;
- if (can_do_pipelined_register_writes(brw)) {
+ if (brw->can_do_pipelined_register_writes) {
ctx->Extensions.ARB_draw_indirect = true;
ctx->Extensions.ARB_transform_feedback2 = true;
ctx->Extensions.ARB_transform_feedback3 = true;
--
2.4.6
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