i915g: implement hw clear

Benefits:
- spares us a relocation.
- needed for zone rendering (if that ever happens).
- just awesome.

v2: Rename the debug option. Completely disabling the blitter is
required for Y tiling to work, so this option will cover other
code paths in the future.

v3: Implement suggestions by Jakob Bornecrantz.

Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

1 files changed, 2 insertions, 1 deletions

diff --git a/src/gallium/drivers/i915/i915_debug.c b/src/gallium/drivers/i915/i915_debug.c
index 1713bf131f..c4eed473e9 100644
--- a/src/gallium/drivers/i915/i915_debug.c
+++ b/src/gallium/drivers/i915/i915_debug.c
@@ -46,17 +46,18 @@ static const struct debug_named_value debug_options[] = {
 };
 
 unsigned i915_debug = 0;
-boolean i915_tiling = TRUE;
 
 DEBUG_GET_ONCE_FLAGS_OPTION(i915_debug, "I915_DEBUG", debug_options, 0)
 DEBUG_GET_ONCE_BOOL_OPTION(i915_no_tiling, "I915_NO_TILING", FALSE)
 DEBUG_GET_ONCE_BOOL_OPTION(i915_lie, "I915_LIE", FALSE)
+DEBUG_GET_ONCE_BOOL_OPTION(i915_use_blitter, "I915_USE_BLITTER", FALSE)
 
 void i915_debug_init(struct i915_screen *is)
 {
    i915_debug = debug_get_option_i915_debug();
    is->debug.tiling = !debug_get_option_i915_no_tiling();
    is->debug.lie = debug_get_option_i915_lie();
+   is->debug.use_blitter = debug_get_option_i915_use_blitter();
 }