Thanks. I should know in a day or two whether it's an easy integration.
Sent from my SGH-T839 using xda premium
[Q] SK4G dropping keystrokes randomly
- Thread starter khaldood
- Start date
Thanks. I should know in a day or two whether it's an easy integration.
Sent from my SGH-T839 using xda premium
It turns out it was quite easy to integrate.
http://xdaforums.com/showthread.php?p=26324759#post26324759
Note that the key feature of this patch is that it makes the column and timer delays adjustable. The default settings may or may not be particularly good or suitable for your usage. I encourage interested individuals to experiment with the timings and report their results.
From the Kconfig help text:
The current delays may be read with:
cat /sys/devices/platform/s3c-keypad/column_delay
cat /sys/devices/platform/s3c-keypad/timer_delay
and new delays may be set with:
echo C > /sys/devices/platform/s3c-keypad/column_delay
echo T > /sys/devices/platform/s3c-keypad/timer_delay
where C is the column-switch delay (µs) and T the timer delay (jiffies).
A timer delay of "1" yields the shortest timer, and the most responsive keypad possible, whereas a delay of HZ (e.g., "256") is the longest allowed. For HZ=256, a delay of "2" (HZ/100) is default.
A column-switch delay of "1" is the most efficient (0.1% CPU util.) but results in ghost key presses across columns (rows). The default "300" is very inefficient, 34.6% CPU util., for a timer delay of "2". Try if values of "50" (5.8% CPU) or even "5" (0.6% CPU) work well without ghosting. This delay affects efficiency only, not responsiveness.
awesome man, thanks a lot. the patch FINALLY gets tested after nearly a year! after we play with it a bit perhaps i'll surprise Mkasick and post back in his thread with the results.
just flashed it and it booted up fine. will probably have to play with the settings tomorrow, but will report back with any points of interest. thanks again
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good news, the post was easy to find, and the patch is still there!
http://xdaforums.com/showpost.php?p=16096212&postcount=79
this was back in the days of KD1, but i hope it could still be of use to us.2
Thanks. I should know in a day or two whether it's an easy integration.
Sent from my SGH-T839 using xda premium2
It turns out it was quite easy to integrate.
http://xdaforums.com/showthread.php?p=26324759#post26324759
Note that the key feature of this patch is that it makes the column and timer delays adjustable. The default settings may or may not be particularly good or suitable for your usage. I encourage interested individuals to experiment with the timings and report their results.
From the Kconfig help text:
The current delays may be read with:
cat /sys/devices/platform/s3c-keypad/column_delay
cat /sys/devices/platform/s3c-keypad/timer_delay
and new delays may be set with:
echo C > /sys/devices/platform/s3c-keypad/column_delay
echo T > /sys/devices/platform/s3c-keypad/timer_delay
where C is the column-switch delay (µs) and T the timer delay (jiffies).
A timer delay of "1" yields the shortest timer, and the most responsive keypad possible, whereas a delay of HZ (e.g., "256") is the longest allowed. For HZ=256, a delay of "2" (HZ/100) is default.
A column-switch delay of "1" is the most efficient (0.1% CPU util.) but results in ghost key presses across columns (rows). The default "300" is very inefficient, 34.6% CPU util., for a timer delay of "2". Try if values of "50" (5.8% CPU) or even "5" (0.6% CPU) work well without ghosting. This delay affects efficiency only, not responsiveness.1
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