[PATCH 23/133] [Jaunty SRU] ARM.imx51 Freescale:ENGR00109721 IPUv3:Fix the issue of resizing from 1280*720 to 800*480

[Brad Figg]

From: Liu Ying <b17645 at freescale.com>

1) Fix the wrong condition to do downsizing in IC channels.
2) Add downsize/resize capability checking of IC channels.

Signed-off-by: Liu Ying <b17645 at freescale.com>
Signed-off-by: Brad Figg <brad.figg at canonical.com>
---
 drivers/mxc/ipu3/ipu_ic.c |   11 +++++++++--
 1 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/drivers/mxc/ipu3/ipu_ic.c b/drivers/mxc/ipu3/ipu_ic.c
index 1d658cd..c7708a3 100644
--- a/drivers/mxc/ipu3/ipu_ic.c
+++ b/drivers/mxc/ipu3/ipu_ic.c
@@ -601,14 +601,21 @@ static bool _calc_resize_coeffs(uint32_t inSize, uint32_t outSize,
 	uint32_t tempSize;
 	uint32_t tempDownsize;
 
+	/* Input size cannot be more than 4096 */
+	/* Output size cannot be more than 1024 */
+	if ((inSize > 4096) || (outSize > 1024))
+		return false;
+
 	/* Cannot downsize more than 8:1 */
 	if ((outSize << 3) < inSize)
 		return false;
 
-	/* compute downsizing coefficient */
+	/* Compute downsizing coefficient */
+	/* Output of downsizing unit cannot be more than 1024 */
 	tempDownsize = 0;
 	tempSize = inSize;
-	while ((tempSize >= outSize * 2) && (tempDownsize < 2)) {
+	while (((tempSize > 1024) || (tempSize >= outSize * 2)) &&
+	       (tempDownsize < 2)) {
 		tempSize >>= 1;
 		tempDownsize++;
 	}
-- 
1.6.0.4