From: Marek Olšák <maraeo@gmail.com>
Date: Thu, 1 Nov 2012 01:00:37 +0000 (+0100)
Subject: r600g: re-enable handling of DISCARD_RANGE, improving performance
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=1eedebc65b02130ef7a27062a1ed67972a317a08;p=mesa.git

r600g: re-enable handling of DISCARD_RANGE, improving performance

It seems to work for me now. Even the graphics corruption is gone.

This also boosts performance in Reaction Quake.
---

diff --git a/src/gallium/drivers/r600/r600_buffer.c b/src/gallium/drivers/r600/r600_buffer.c
index 116ab51196f..968824ea1bb 100644
--- a/src/gallium/drivers/r600/r600_buffer.c
+++ b/src/gallium/drivers/r600/r600_buffer.c
@@ -136,7 +136,6 @@ static void *r600_buffer_transfer_map(struct pipe_context *ctx,
 			r600_set_constants_dirty_if_bound(rctx, rbuffer);
 		}
 	}
-#if 0 /* this is broken (see Bug 53130) */
 	else if ((usage & PIPE_TRANSFER_DISCARD_RANGE) &&
 		 !(usage & PIPE_TRANSFER_UNSYNCHRONIZED) &&
 		 rctx->screen->has_streamout &&
@@ -159,7 +158,6 @@ static void *r600_buffer_transfer_map(struct pipe_context *ctx,
 							ptransfer, data, staging);
 		}
 	}
-#endif
 
 	data = rctx->ws->buffer_map(rbuffer->cs_buf, rctx->cs, usage);
 	if (!data) {