linux-kernel - [PATCH][INPUT]s3c2410_ts.c add report for ABS_PRESSURE, this fix tslib problem that not, been able to detect pen-down and pen-up events.

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Date:	Thu, 05 May 2011 15:54:22 +0800
From:	microcai <microcaicai@...il.com>
To:	arnaud.patard@...-net.org, ben@...tec.co.uk
CC:	LKML <linux-kernel@...r.kernel.org>
Subject: [PATCH][INPUT]s3c2410_ts.c add report for ABS_PRESSURE, this fix
 tslib problem that not, been able to detect pen-down and pen-up events.

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Hash: SHA1

Heya,

I'm not sure if this works for every SoC, but works for my machine.
The tslib was never never able to detect pen-down and pen-up event even
the driver does report BT_TOUCH up and down, I figure out that what
it need is actually ABS_PRESSURE.

Spend days and night debug tslib, but amazing that it's the driver
that case the problem.

I've see the log,

   - remove ABS_PRESSURE reporting, tslib can be fixed

It was removed once, so, I'm not sure if my patch fits for all, or
just my ugly hardware?


- From 995fbed3a4b0a913916b96eef907abe47fec3f91 Mon Sep 17 00:00:00 2001
From: microcai <microcai@...oraproject.org>
Date: Thu, 5 May 2011 14:40:44 +0800
Subject: [PATCH] add report for ABS_PRESSURE, this fix tslib problem
that not
 been able to detect pen-down and pen-up events.

- ---
 drivers/input/touchscreen/s3c2410_ts.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/drivers/input/touchscreen/s3c2410_ts.c
b/drivers/input/touchscreen/s3c2410_ts.c
index 8feb7f3..ecab5d4 100644
- --- a/drivers/input/touchscreen/s3c2410_ts.c
+++ b/drivers/input/touchscreen/s3c2410_ts.c
@@ -126,6 +126,7 @@ static void touch_timer_fire(unsigned long data)
 			input_report_abs(ts.input, ABS_Y, ts.yp);

 			input_report_key(ts.input, BTN_TOUCH, 1);
+			input_report_abs(ts.input, ABS_PRESSURE, 1);
 			input_sync(ts.input);

 			ts.xp = 0;
@@ -140,6 +141,7 @@ static void touch_timer_fire(unsigned long data)
 		ts.count = 0;

 		input_report_key(ts.input, BTN_TOUCH, 0);
+		input_report_abs(ts.input, ABS_PRESSURE, 0);
 		input_sync(ts.input);

 		writel(WAIT4INT | INT_DOWN, ts.io + S3C2410_ADCTSC);
@@ -318,6 +320,7 @@ static int __devinit s3c2410ts_probe(struct
platform_device *pdev)
 	ts.input->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
 	input_set_abs_params(ts.input, ABS_X, 0, 0x3FF, 0, 0);
 	input_set_abs_params(ts.input, ABS_Y, 0, 0x3FF, 0, 0);
+	input_set_abs_params(ts.input, ABS_PRESSURE, 0, 1, 0, 0);

 	ts.input->name = "S3C24XX TouchScreen";
 	ts.input->id.bustype = BUS_HOST;
- -- 
1.7.5.rc3


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