From: Greg Hackmann <ghackmann@google.com>
Date: Fri, 27 Sep 2013 17:23:41 +0000 (-0700)
Subject: hwc: do not allow gsc downscaling by exactly max_downscale
X-Git-Tag: cm-11.0-XNPH22R-bacon-03d77315ea~1^2~6
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=c0b4a4f1a8b088964ded32dfee294b9199c71534;p=GitHub%2FLineageOS%2Fandroid_hardware_samsung_slsi_exynos5.git

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>
---

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 @@ static bool exynos5_supports_gscaler(hwc_layer_1_t &layer, int format,
             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) &&