Add fallback debugging (R128_DEBUG=fall) output, and set DO_DEBUG=1 by default

so that we can use the env var to get output.  Add a no_rast driconf option to
force software fallbacks.

1 files changed, 6 insertions, 0 deletions

diff --git a/src/mesa/drivers/dri/r128/r128_context.c b/src/mesa/drivers/dri/r128/r128_context.c
index 2b0363d292..287f041a81 100644
--- a/src/mesa/drivers/dri/r128/r128_context.c
+++ b/src/mesa/drivers/dri/r128/r128_context.c
@@ -89,6 +89,7 @@ static const struct dri_debug_control debug_control[] =
     { "2d",    DEBUG_VERBOSE_2D },
     { "sync",  DEBUG_ALWAYS_SYNC },
     { "api",   DEBUG_VERBOSE_API },
+    { "fall",  DEBUG_VERBOSE_FALL },
     { NULL,    0 }
 };
 
@@ -258,6 +259,11 @@ GLboolean r128CreateContext( const __GLcontextModes *glVisual,
 				     debug_control );
 #endif
 
+   if (driQueryOptionb(&rmesa->optionCache, "no_rast")) {
+      fprintf(stderr, "disabling 3D acceleration\n");
+      FALLBACK(rmesa, R128_FALLBACK_DISABLE, 1);
+   }
+
    return GL_TRUE;
 }