From: José Fonseca <jfonseca@vmware.com>
Date: Mon, 14 Mar 2011 16:55:46 +0000 (+0000)
Subject: svga: Tell the host to discard when doing writes without FLUSH_EXPLICIT.
X-Git-Tag: mesa-7.11-rc1~1448
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=b0fff8d17eb65368db018f6ccc226482ccf46763;p=platform%2Fupstream%2Fmesa.git

svga: Tell the host to discard when doing writes without FLUSH_EXPLICIT.
---

diff --git a/src/gallium/drivers/svga/svga_resource_buffer.c b/src/gallium/drivers/svga/svga_resource_buffer.c
index ae854a8..2d7c524 100644
--- a/src/gallium/drivers/svga/svga_resource_buffer.c
+++ b/src/gallium/drivers/svga/svga_resource_buffer.c
@@ -228,11 +228,18 @@ svga_buffer_unmap( struct pipe_context *pipe,
    if(sbuf->hwbuf)
       sws->buffer_unmap(sws, sbuf->hwbuf);
 
-   if(sbuf->map.writing) {
-      if(!sbuf->map.flush_explicit) {
-         /* No mapped range was flushed -- flush the whole buffer */
+   if (sbuf->map.writing) {
+      if (!sbuf->map.flush_explicit) {
+         /*
+          * Mapped range not flushed explicitly, so flush the whole buffer,
+          * and tell the host to discard the contents when processing the DMA
+          * command.
+          */
+
          SVGA_DBG(DEBUG_DMA, "flushing the whole buffer\n");
    
+         sbuf->dma.flags.discard = TRUE;
+
          svga_buffer_add_range(sbuf, 0, sbuf->b.b.width0);
       }