Workaround for Radeon lockups on fast machines

1 files changed, 13 insertions, 1 deletions

diff --git a/shared-core/radeon_state.c b/shared-core/radeon_state.c
index 15cd759a..42b48df6 100644
--- a/shared-core/radeon_state.c
+++ b/shared-core/radeon_state.c
@@ -1692,6 +1692,19 @@ static int radeon_emit_packet3_cliprect( drm_device_t *dev,
 		if ( i < cmdbuf->nbox ) {
 			if (DRM_COPY_FROM_USER_UNCHECKED( &box, &boxes[i], sizeof(box) ))
 				return DRM_ERR(EFAULT);
+			/* FIXME The second and subsequent times round this loop, send a
+			 * WAIT_UNTIL_3D_IDLE before calling emit_clip_rect(). This
+			 * fixes a lockup on fast machines when sending several
+			 * cliprects with a cmdbuf, as when waving a 2D window over
+			 * a 3D window. Something in the commands from user space
+			 * seems to hang the card when they're sent several times
+			 * in a row. That would be the correct place to fix it but
+			 * this works around it until I can figure that out - Tim Smith */
+			if ( i ) {
+				BEGIN_RING( 2 );
+				RADEON_WAIT_UNTIL_3D_IDLE();
+				ADVANCE_RING();
+			}
 			radeon_emit_clip_rect( dev_priv, &box );
 		}
 		
@@ -1700,7 +1713,6 @@ static int radeon_emit_packet3_cliprect( drm_device_t *dev,
 		ADVANCE_RING();
 
 	} while ( ++i < cmdbuf->nbox );
-
  	if (cmdbuf->nbox == 1)
 		cmdbuf->nbox = 0;