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Implement scaled radial deadzone in S922X kernel.

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littleguy77 2023-09-12 17:52:42 -04:00
parent 1018f10be7
commit 13bf681da2
1 changed files with 13 additions and 4 deletions
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17
projects/Amlogic/packages/linux/patches/S922X/000-s922x-devices.patch
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@ -2652,7 +2652,7 @@ diff -rupN linux.orig/drivers/input/joystick/amlogic-saradc.h linux/drivers/inpu
diff -rupN linux.orig/drivers/input/joystick/odroid-gou-joypad.c linux/drivers/input/joystick/odroid-gou-joypad.c
--- linux.orig/drivers/input/joystick/odroid-gou-joypad.c 1970-01-01 00:00:00.000000000 +0000
+++ linux/drivers/input/joystick/odroid-gou-joypad.c 2023-09-12 12:03:27.490291628 +0000
@@ -0,0 +1,950 @@
@@ -0,0 +1,959 @@
+/*----------------------------------------------------------------------------*/
+#include <linux/kernel.h>
+#include <linux/module.h>
@ -3042,6 +3042,7 @@ diff -rupN linux.orig/drivers/input/joystick/odroid-gou-joypad.c linux/drivers/i
+{
+ struct joypad *joypad = poll_dev->private;
+ int nbtn;
+ int mag;
+
+ /* Assumes an even number of axes and that joystick axis pairs are sequential */
+ /* e.g. left stick Y immediately follows left stick X */
@ -3067,12 +3068,19 @@ diff -rupN linux.orig/drivers/input/joystick/odroid-gou-joypad.c linux/drivers/i
+ }
+ adcy->value = adcy->value - adcy->cal;
+
+ /* Joystick Deadzone check */
+ /* Scaled Radial Deadzone */
+ /* https://web.archive.org/web/20190129113357/http://www.third-helix.com/2013/04/12/doing-thumbstick-dead-zones-right.html */
+ mag = int_sqrt((adcx->value * adcx->value) + (adcy->value * adcy->value));
+ if (joypad->bt_adc_deadzone) {
+ if (abs(adcx->value) < joypad->bt_adc_deadzone)
+ if (mag <= joypad->bt_adc_deadzone) {
+ adcx->value = 0;
+ if (abs(adcy->value) < joypad->bt_adc_deadzone)
+ adcy->value = 0;
+ }
+ else {
+ /* Assumes adcx->max == -adcx->min == adcy->max == -adcy->min */
+ adcx->value = (adcx->max * adcx->value * (mag - joypad->bt_adc_deadzone)) / (mag * (adcx->max - joypad->bt_adc_deadzone));
+ adcy->value = (adcy->max * adcy->value * (mag - joypad->bt_adc_deadzone)) / (mag * (adcy->max - joypad->bt_adc_deadzone));
+ }
+ }
+
+ /* adc data tuning */
@ -3085,6 +3093,7 @@ diff -rupN linux.orig/drivers/input/joystick/odroid-gou-joypad.c linux/drivers/i
+ if (adcy->tuning_p && adcy->value > 0)
+ adcy->value = ADC_DATA_TUNING(adcy->value, adcy->tuning_p);
+
+ /* Clamp to [min, max] */
+ adcx->value = adcx->value > adcx->max ? adcx->max : adcx->value;
+ adcx->value = adcx->value < adcx->min ? adcx->min : adcx->value;
+ adcy->value = adcy->value > adcy->max ? adcy->max : adcy->value;