Mesa (master): r600g: fix num_banks interpretation on eg+

[Alex Deucher]

Module: Mesa
Branch: master
Commit: c4930cb417defe9f58c27e909adb18d3c7784883
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=c4930cb417defe9f58c27e909adb18d3c7784883

Author: Alex Deucher <alexdeucher at gmail.com>
Date:   Wed Jun 22 12:33:01 2011 -0400

r600g: fix num_banks interpretation on eg+

Field is encoded:
0 = 4 banks
1 = 8 banks
2 = 16 banks

Signed-off-by: Alex Deucher <alexdeucher at gmail.com>

---

 src/gallium/winsys/r600/drm/r600_drm.c |   15 ++++++++++++++-
 1 files changed, 14 insertions(+), 1 deletions(-)

diff --git a/src/gallium/winsys/r600/drm/r600_drm.c b/src/gallium/winsys/r600/drm/r600_drm.c
index 03fe385..4602f7f 100644
--- a/src/gallium/winsys/r600/drm/r600_drm.c
+++ b/src/gallium/winsys/r600/drm/r600_drm.c
@@ -156,7 +156,20 @@ static int eg_interpret_tiling(struct radeon *radeon, uint32_t tiling_config)
 		return -EINVAL;
 	}
 
-	radeon->tiling_info.num_banks = (tiling_config & 0xf0) >> 4;
+	switch ((tiling_config & 0xf0) >> 4) {
+	case 0:
+		radeon->tiling_info.num_banks = 4;
+		break;
+	case 1:
+		radeon->tiling_info.num_banks = 8;
+		break;
+	case 2:
+		radeon->tiling_info.num_banks = 16;
+		break;
+	default:
+		return -EINVAL;
+
+	}
 
 	switch ((tiling_config & 0xf00) >> 8) {
 	case 0: