From c8f174900926d3b58cd048ac33b4cbb3de419bfe Mon Sep 17 00:00:00 2001 From: Oliver Date: Mon, 15 Jun 2026 00:08:47 +0100 Subject: Input: sur40 - fix MAX_CONTACTS value based on PixelSense specification The Samsung SUR40 with Microsoft PixelSense is offically specified to support 52 simultaneuous touch contacts, not 64. The value of 64 was an unverified guess as noted by the FIXME comment. Update MAX_CONTACTS to match the documented hardware specification and remove the FIXME. Signed-off-by: Oliver Link: https://patch.msgid.link/20260614230847.4938-1-oliverburns.kernel@gmail.com Signed-off-by: Dmitry Torokhov --- drivers/input/touchscreen/sur40.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'drivers') diff --git a/drivers/input/touchscreen/sur40.c b/drivers/input/touchscreen/sur40.c index fe63d53d56db..77ec2c94b91f 100644 --- a/drivers/input/touchscreen/sur40.c +++ b/drivers/input/touchscreen/sur40.c @@ -128,8 +128,8 @@ struct sur40_image_header { /* polling interval (ms) */ #define POLL_INTERVAL 1 -/* maximum number of contacts FIXME: this is a guess? */ -#define MAX_CONTACTS 64 +/* maximum number of contacts */ +#define MAX_CONTACTS 52 /* control commands */ #define SUR40_GET_VERSION 0xb0 /* 12 bytes string */ -- cgit v1.2.3