diff options
Diffstat (limited to 'target/linux/s3c24xx/patches-2.6.24/1314-palliate_touch_screen_jitter.patch.patch')
| -rw-r--r-- | target/linux/s3c24xx/patches-2.6.24/1314-palliate_touch_screen_jitter.patch.patch | 130 |
1 files changed, 0 insertions, 130 deletions
diff --git a/target/linux/s3c24xx/patches-2.6.24/1314-palliate_touch_screen_jitter.patch.patch b/target/linux/s3c24xx/patches-2.6.24/1314-palliate_touch_screen_jitter.patch.patch deleted file mode 100644 index 751d46416..000000000 --- a/target/linux/s3c24xx/patches-2.6.24/1314-palliate_touch_screen_jitter.patch.patch +++ /dev/null @@ -1,130 +0,0 @@ -From abe8f448547d1bd69ac2963e07e2657f27b79691 Mon Sep 17 00:00:00 2001 -From: I-Fan Chen <tick@openmoko.com> -Date: Wed, 29 Oct 2008 03:15:18 +0000 -Subject: [PATCH] palliate_touch_screen_jitter.patch - - S3C24XX touchscreen: To palliate the data jitter from touchpanel - Thanks to Dima Kogan patch eff39cde0d3cdd2afd5e1b4be5a8eb6cf195543e, - in which try to balence the up/down events, and inspired this patch. - We can observe a serious up/down jitter phenomenon when touching the touchscreen lightly. - This only happens when the press pressure is pretty light: - eg. large scale light touch, - starting to touch, - or going to move finger from touch panel. - This will make user space library think it got extra click events. - In order to palliate with this phenomenon, we delayed the up event for a while, - and see if it is a jitter or not. - The threshold is crucial. If it is too long, multiple clicks will be filtered out. - If it is too short we did not filter anything out. - From the log and some survey we can see that the interval of two clicks is generally over 0.1 sec. - And Most jitter events happens in 0.3 sec. - And the longest duration of vision is about 1/16 sec, and it's not easy for human to notice. - So I choose 1/16 sec as the threshold. - This filters out most (not all) jitter events, and preserves the normal behavior we expected. - -Signed-off-by: I-Fan Chen <tick@openmoko.com> ---- - drivers/input/touchscreen/s3c2410_ts.c | 47 +++++++++++++++++--------------- - 1 files changed, 25 insertions(+), 22 deletions(-) - -diff --git a/drivers/input/touchscreen/s3c2410_ts.c b/drivers/input/touchscreen/s3c2410_ts.c -index fc1c500..95672ff 100644 ---- a/drivers/input/touchscreen/s3c2410_ts.c -+++ b/drivers/input/touchscreen/s3c2410_ts.c -@@ -78,6 +78,12 @@ - - #define DEBUG_LVL KERN_DEBUG - -+#define TOUCH_STANDBY_FLAG 0 -+#define TOUCH_PRESSED_FLAG 1 -+#define TOUCH_RELEASE_FLAG 2 -+ -+#define TOUCH_RELEASE_TIMEOUT (HZ >> 4) -+ - MODULE_AUTHOR("Arnaud Patard <arnaud.patard@rtp-net.org>"); - MODULE_DESCRIPTION("s3c2410 touchscreen driver"); - MODULE_LICENSE("GPL"); -@@ -131,7 +137,7 @@ static void clear_raw_fifo(void) - ts.raw_running_avg.x = 0; - ts.raw_running_avg.y = 0; - ts.flag_previous_exceeded_threshold = 0; -- ts.flag_first_touch_sent = 0; -+ ts.flag_first_touch_sent = TOUCH_STANDBY_FLAG; - } - - -@@ -143,6 +149,10 @@ static inline void s3c2410_ts_connect(void) - s3c2410_gpio_cfgpin(S3C2410_GPG15, S3C2410_GPG15_nYPON); - } - -+static void touch_timer_fire(unsigned long data); -+static struct timer_list touch_timer = -+ TIMER_INITIALIZER(touch_timer_fire, 0, 0); -+ - static void touch_timer_fire(unsigned long data) - { - unsigned long data0; -@@ -155,18 +165,9 @@ static void touch_timer_fire(unsigned long data) - updown = (!(data0 & S3C2410_ADCDAT0_UPDOWN)) && - (!(data1 & S3C2410_ADCDAT0_UPDOWN)); - -- // if we need to send an untouch event, but we haven't yet sent the -- // touch event (this happens if the touchscreen was tapped lightly), -- // send the touch event first -- if (!updown && !ts.flag_first_touch_sent && ts.count != 0) { -- input_report_abs(ts.dev, ABS_X, ts.xp >> ts.shift); -- input_report_abs(ts.dev, ABS_Y, ts.yp >> ts.shift); -- -- input_report_key(ts.dev, BTN_TOUCH, 1); -- input_report_abs(ts.dev, ABS_PRESSURE, 1); -- input_sync(ts.dev); -- ts.flag_first_touch_sent = 1; -- } -+ if ( updown && ts.flag_first_touch_sent == TOUCH_RELEASE_FLAG ) { -+ ts.flag_first_touch_sent = TOUCH_PRESSED_FLAG; -+ } - - if (updown) { - if (ts.count != 0) { -@@ -189,7 +190,7 @@ static void touch_timer_fire(unsigned long data) - input_report_key(ts.dev, BTN_TOUCH, 1); - input_report_abs(ts.dev, ABS_PRESSURE, 1); - input_sync(ts.dev); -- ts.flag_first_touch_sent = 1; -+ ts.flag_first_touch_sent = TOUCH_PRESSED_FLAG; - } - - ts.xp = 0; -@@ -202,19 +203,21 @@ static void touch_timer_fire(unsigned long data) - S3C2410_ADCCON_ENABLE_START, base_addr+S3C2410_ADCCON); - } else { - ts.count = 0; -- -- input_report_key(ts.dev, BTN_TOUCH, 0); -- input_report_abs(ts.dev, ABS_PRESSURE, 0); -- input_sync(ts.dev); -- ts.flag_first_touch_sent = 0; -+ -+ if ( ts.flag_first_touch_sent == TOUCH_RELEASE_FLAG ) { -+ input_report_key(ts.dev, BTN_TOUCH, 0); -+ input_report_abs(ts.dev, ABS_PRESSURE, 0); -+ input_sync(ts.dev); -+ ts.flag_first_touch_sent = TOUCH_STANDBY_FLAG; -+ } if ( ts.flag_first_touch_sent == TOUCH_PRESSED_FLAG ) { -+ ts.flag_first_touch_sent = TOUCH_RELEASE_FLAG; -+ mod_timer(&touch_timer, jiffies + TOUCH_RELEASE_TIMEOUT); -+ } - - writel(WAIT4INT(0), base_addr+S3C2410_ADCTSC); - } - } - --static struct timer_list touch_timer = -- TIMER_INITIALIZER(touch_timer_fire, 0, 0); -- - static irqreturn_t stylus_updown(int irq, void *dev_id) - { - unsigned long data0; --- -1.5.6.5 - |