[i915] Add INTEL_DEBUG=sync debug flag to wait for fences after making them.

3 files changed, 8 insertions, 0 deletions

diff --git a/src/mesa/drivers/dri/i915/intel_context.c b/src/mesa/drivers/dri/i915/intel_context.c
index 2b93f60ab4..a26a424f86 100644
--- a/src/mesa/drivers/dri/i915/intel_context.c
+++ b/src/mesa/drivers/dri/i915/intel_context.c
@@ -245,6 +245,7 @@ static const struct dri_debug_control debug_control[] = {
    {"reg", DEBUG_REGION},
    {"fbo", DEBUG_FBO},
    {"lock", DEBUG_LOCK},
+   {"sync", DEBUG_SYNC},
    {NULL, 0}
 };
 
diff --git a/src/mesa/drivers/dri/i915/intel_context.h b/src/mesa/drivers/dri/i915/intel_context.h
index 7272f8f352..4bec712f3d 100644
--- a/src/mesa/drivers/dri/i915/intel_context.h
+++ b/src/mesa/drivers/dri/i915/intel_context.h
@@ -355,6 +355,7 @@ extern int INTEL_DEBUG;
 #define DEBUG_REGION    0x400
 #define DEBUG_FBO       0x800
 #define DEBUG_LOCK      0x1000
+#define DEBUG_SYNC	0x2000
 
 #define DBG(...)  do { if (INTEL_DEBUG & FILE_DEBUG_FLAG) _mesa_printf(__VA_ARGS__); } while(0)
 
diff --git a/src/mesa/drivers/dri/intel/intel_batchbuffer.c b/src/mesa/drivers/dri/intel/intel_batchbuffer.c
index 9ec60fcff3..4e698627a3 100644
--- a/src/mesa/drivers/dri/intel/intel_batchbuffer.c
+++ b/src/mesa/drivers/dri/intel/intel_batchbuffer.c
@@ -212,6 +212,12 @@ intel_batchbuffer_flush(struct intel_batchbuffer *batch)
    if (!was_locked)
       UNLOCK_HARDWARE(intel);
 
+   if (INTEL_DEBUG & DEBUG_SYNC) {
+      fprintf(stderr, "waiting for idle\n");
+      if (batch->last_fence != NULL)
+	 dri_fence_wait(batch->last_fence);
+   }
+
    /* Reset the buffer:
     */
    intel_batchbuffer_reset(batch);