From: Florian Echtler <floe@butterbrot.org>
Date: Tue, 31 May 2016 20:15:32 +0000 (-0300)
Subject: [media] sur40: lower poll interval to fix occasional FPS drops to ~56 FPS
X-Git-Tag: v4.8-rc1~152^2~162
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=af766ee005c496b8567976dc3eed7676443ed6de;p=karo-tx-linux.git

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

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>
Cc: <stable@vger.kernel.org>      # for v4.2 and up
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
---

diff --git a/drivers/input/touchscreen/sur40.c b/drivers/input/touchscreen/sur40.c
index f124f3af0de1..bff525f26e87 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