From: Florian Echtler <floe@butterbrot.org>
Date: Tue, 31 May 2016 20:15:32 +0000 (-0300)
Subject: sur40: lower poll interval to fix occasional FPS drops to ~56 FPS
X-Git-Tag: firefly_0821_release~176^2~4^2~31^2~409
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=f8ad7cb60062a5a0514eb720b44f164276ebc4e0;p=firefly-linux-kernel-4.4.55.git

sur40: lower poll interval to fix occasional FPS drops to ~56 FPS

commit af766ee005c496b8567976dc3eed7676443ed6de upstream.

The framerate sometimes drops below 60 Hz if the poll interval is too high.
Lowering it to the minimum of 1 ms fixes this.

Signed-off-by: Martin Kaltenbrunner <modin@yuri.at>
Signed-off-by: Florian Echtler <floe@butterbrot.org>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/input/touchscreen/sur40.c b/drivers/input/touchscreen/sur40.c
index d214f22ed305..07a262bddf57 100644
--- a/drivers/input/touchscreen/sur40.c
+++ b/drivers/input/touchscreen/sur40.c
@@ -126,7 +126,7 @@ struct sur40_image_header {
 #define VIDEO_PACKET_SIZE  16384
 
 /* polling interval (ms) */
-#define POLL_INTERVAL 4
+#define POLL_INTERVAL 1
 
 /* maximum number of contacts FIXME: this is a guess? */
 #define MAX_CONTACTS 64