commit c0b4a4f1a8b088964ded32dfee294b9199c71534
author Greg Hackmann <ghackmann@google.com> Fri Sep 27 10:23:41 2013 -0700
committer Greg Hackmann <ghackmann@google.com> Fri Sep 27 10:23:43 2013 -0700
tree 83b5e10795bba63d9c367a5a5aa61338014f1b6a
parent d03ee77200600d35e18055b8cea259c613ffcfa1

hwc: do not allow gsc downscaling by exactly max_downscale

The Gscaler registers do not have enough bits to represent downscaling
by exactly 16x

Bug: 10946861

Change-Id: I6a9921193d9188bca2344815c29863c550c5e3dd
Signed-off-by: Greg Hackmann <ghackmann@google.com>

libhwc/hwc.cpp

diff --git a/libhwc/hwc.cpp b/libhwc/hwc.cpp
index d5a7603..546b047 100644
--- a/libhwc/hwc.cpp
+++ b/libhwc/hwc.cpp
@@ -401,11 +401,11 @@
             dst_crop_w_aligned(dest_w) &&
             handle->stride <= max_w &&
             handle->stride % GSC_W_ALIGNMENT == 0 &&
-            src_w <= dest_w * max_downscale &&
+            src_w < dest_w * max_downscale &&
             dest_w <= src_w * max_upscale &&
             handle->vstride <= max_h &&
             handle->vstride % GSC_H_ALIGNMENT == 0 &&
-            src_h <= dest_h * max_downscale &&
+            src_h < dest_h * max_downscale &&
             dest_h <= src_h * max_upscale &&
             // per 46.2
             (!rot90or270 || layer.sourceCrop.top % 2 == 0) &&