Enable de-ghosting for RGB/LED matrix on all ISSI LED drivers (#14508)

* Initial work for de-ghost enable

* Dumb mistake with the redefine

* Added Copywrite stuff on source files

* Fixed whitespace errors

* Added support for all ISSI LED drivers

* Updated docs for support for ISSI LED driver pull-up pull-down

* Applied clang format

* Added 'boolean' flag to enable de-ghosting for the is31fl3731 IC

* Fixed some of the grammer in the docs

* Fixed comment placement and grammer of comment

* Fixed whitespace errors from lint

Co-authored-by: donicrosby <donicrosby1995@gmail.com>

10 files changed, 98 insertions, 1 deletions

diff --git a/drivers/led/issi/is31fl3731-simple.c b/drivers/led/issi/is31fl3731-simple.c
index d295772f5e..9d28ea91d0 100644
--- a/drivers/led/issi/is31fl3731-simple.c
+++ b/drivers/led/issi/is31fl3731-simple.c
@@ -1,6 +1,7 @@
 /* Copyright 2017 Jason Williams
  * Copyright 2018 Jack Humbert
  * Copyright 2019 Clueboard
+ * Copyright 2021 Doni Crosby
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -40,6 +41,9 @@
 
 #define ISSI_REG_PICTUREFRAME 0x01
 
+// Not defined in the datasheet -- See AN for IC
+#define ISSI_REG_GHOST_IMAGE_PREVENTION 0xC2  // Set bit 4 to enable de-ghosting
+
 #define ISSI_REG_SHUTDOWN 0x0A
 #define ISSI_REG_AUDIOSYNC 0x06
 
@@ -144,6 +148,9 @@ void IS31FL3731_init(uint8_t addr) {
 
     // enable software shutdown
     IS31FL3731_write_register(addr, ISSI_REG_SHUTDOWN, 0x00);
+#ifdef ISSI_3731_DEGHOST  // set to enable de-ghosting of the array
+    IS31FL3731_write_register(addr, ISSI_REG_GHOST_IMAGE_PREVENTION, 0x10);
+#endif
 
     // this delay was copied from other drivers, might not be needed
     wait_ms(10);
diff --git a/drivers/led/issi/is31fl3731.c b/drivers/led/issi/is31fl3731.c
index 110bdc1be4..fbf24c30fb 100644
--- a/drivers/led/issi/is31fl3731.c
+++ b/drivers/led/issi/is31fl3731.c
@@ -1,5 +1,6 @@
 /* Copyright 2017 Jason Williams
  * Copyright 2018 Jack Humbert
+ * Copyright 2021 Doni Crosby
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -39,6 +40,9 @@
 
 #define ISSI_REG_PICTUREFRAME 0x01
 
+// Not defined in the datasheet -- See AN for IC
+#define ISSI_REG_GHOST_IMAGE_PREVENTION 0xC2  // Set bit 4 to enable de-ghosting
+
 #define ISSI_REG_SHUTDOWN 0x0A
 #define ISSI_REG_AUDIOSYNC 0x06
 
@@ -132,6 +136,9 @@ void IS31FL3731_init(uint8_t addr) {
 
     // enable software shutdown
     IS31FL3731_write_register(addr, ISSI_REG_SHUTDOWN, 0x00);
+#ifdef ISSI_3731_DEGHOST  // set to enable de-ghosting of the array
+    IS31FL3731_write_register(addr, ISSI_REG_GHOST_IMAGE_PREVENTION, 0x10);
+#endif
 
     // this delay was copied from other drivers, might not be needed
     wait_ms(10);
diff --git a/drivers/led/issi/is31fl3733.c b/drivers/led/issi/is31fl3733.c
index 4ddd827caf..c64d035135 100644
--- a/drivers/led/issi/is31fl3733.c
+++ b/drivers/led/issi/is31fl3733.c
@@ -1,6 +1,7 @@
 /* Copyright 2017 Jason Williams
  * Copyright 2018 Jack Humbert
  * Copyright 2018 Yiancar
+ * Copyright 2021 Doni Crosby
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -58,6 +59,12 @@
 
 #ifndef ISSI_PWM_FREQUENCY
 #    define ISSI_PWM_FREQUENCY 0b000  // PFS - IS31FL3733B only
+#ifndef ISSI_SWPULLUP
+#    define ISSI_SWPULLUP PUR_0R
+#endif
+
+#ifndef ISSI_CSPULLUP
+#    define ISSI_CSPULLUP PUR_0R
 #endif
 
 // Transfer buffer for TWITransmitData()
@@ -158,6 +165,10 @@ void IS31FL3733_init(uint8_t addr, uint8_t sync) {
 
     // Select PG3
     IS31FL3733_write_register(addr, ISSI_COMMANDREGISTER, ISSI_PAGE_FUNCTION);
+    // Set de-ghost pull-up resistors (SWx)
+    IS31FL3733_write_register(addr, ISSI_REG_SWPULLUP, ISSI_SWPULLUP);
+    // Set de-ghost pull-down resistors (CSx)
+    IS31FL3733_write_register(addr, ISSI_REG_CSPULLUP, ISSI_CSPULLUP);
     // Set global current to maximum.
     IS31FL3733_write_register(addr, ISSI_REG_GLOBALCURRENT, 0xFF);
     // Disable software shutdown.
diff --git a/drivers/led/issi/is31fl3733.h b/drivers/led/issi/is31fl3733.h
index 64fd38eb19..daa226b41a 100644
--- a/drivers/led/issi/is31fl3733.h
+++ b/drivers/led/issi/is31fl3733.h
@@ -1,6 +1,7 @@
 /* Copyright 2017 Jason Williams
  * Copyright 2018 Jack Humbert
  * Copyright 2018 Yiancar
+ * Copyright 2021 Doni Crosby
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -47,6 +48,14 @@ void IS31FL3733_set_led_control_register(uint8_t index, bool red, bool green, bo
 void IS31FL3733_update_pwm_buffers(uint8_t addr, uint8_t index);
 void IS31FL3733_update_led_control_registers(uint8_t addr, uint8_t index);
 
+#define PUR_0R 0x00    // No PUR resistor
+#define PUR_05KR 0x02  // 0.5k Ohm resistor in t_NOL
+#define PUR_3KR 0x03   // 3.0k Ohm resistor on all the time
+#define PUR_4KR 0x04   // 4.0k Ohm resistor on all the time
+#define PUR_8KR 0x05   // 8.0k Ohm resistor on all the time
+#define PUR_16KR 0x06  // 16k Ohm resistor on all the time
+#define PUR_32KR 0x07  // 32k Ohm resistor in t_NOL
+
 #define A_1 0x00
 #define A_2 0x01
 #define A_3 0x02
diff --git a/drivers/led/issi/is31fl3736.c b/drivers/led/issi/is31fl3736.c
index 7dece1b1eb..dcaabba2ef 100644
--- a/drivers/led/issi/is31fl3736.c
+++ b/drivers/led/issi/is31fl3736.c
@@ -1,4 +1,5 @@
 /* Copyright 2018 Jason Williams (Wilba)
+ * Copyright 2021 Doni Crosby
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -54,6 +55,14 @@
 #    define ISSI_PERSISTENCE 0
 #endif
 
+#ifndef ISSI_SWPULLUP
+#    define ISSI_SWPULLUP PUR_0R
+#endif
+
+#ifndef ISSI_CSPULLUP
+#    define ISSI_CSPULLUP PUR_0R
+#endif
+
 // Transfer buffer for TWITransmitData()
 uint8_t g_twi_transfer_buffer[20];
 
@@ -140,6 +149,10 @@ void IS31FL3736_init(uint8_t addr) {
 
     // Select PG3
     IS31FL3736_write_register(addr, ISSI_COMMANDREGISTER, ISSI_PAGE_FUNCTION);
+    // Set de-ghost pull-up resistors (SWx)
+    IS31FL3736_write_register(addr, ISSI_REG_SWPULLUP, ISSI_SWPULLUP);
+    // Set de-ghost pull-down resistors (CSx)
+    IS31FL3736_write_register(addr, ISSI_REG_CSPULLUP, ISSI_CSPULLUP);
     // Set global current to maximum.
     IS31FL3736_write_register(addr, ISSI_REG_GLOBALCURRENT, 0xFF);
     // Disable software shutdown.
diff --git a/drivers/led/issi/is31fl3736.h b/drivers/led/issi/is31fl3736.h
index c956c87f7c..a30be90556 100644
--- a/drivers/led/issi/is31fl3736.h
+++ b/drivers/led/issi/is31fl3736.h
@@ -1,4 +1,5 @@
 /* Copyright 2018 Jason Williams (Wilba)
+ * Copyright 2021 Doni Crosby
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -60,6 +61,15 @@ void IS31FL3736_mono_set_led_control_register(uint8_t index, bool enabled);
 void IS31FL3736_update_pwm_buffers(uint8_t addr1, uint8_t addr2);
 void IS31FL3736_update_led_control_registers(uint8_t addr1, uint8_t addr2);
 
+#define PUR_0R 0x00    // No PUR resistor
+#define PUR_05KR 0x01  // 0.5k Ohm resistor
+#define PUR_1KR 0x02   // 1.0k Ohm resistor
+#define PUR_2KR 0x03   // 2.0k Ohm resistor
+#define PUR_4KR 0x04   // 4.0k Ohm resistor
+#define PUR_8KR 0x05   // 8.0k Ohm resistor
+#define PUR_16KR 0x06  // 16k Ohm resistor
+#define PUR_32KR 0x07  // 32k Ohm resistor
+
 #define A_1 0x00
 #define A_2 0x02
 #define A_3 0x04
diff --git a/drivers/led/issi/is31fl3737.c b/drivers/led/issi/is31fl3737.c
index 0bb4ddd425..62862e0d41 100644
--- a/drivers/led/issi/is31fl3737.c
+++ b/drivers/led/issi/is31fl3737.c
@@ -1,6 +1,7 @@
 /* Copyright 2017 Jason Williams
  * Copyright 2018 Jack Humbert
  * Copyright 2018 Yiancar
+ * Copyright 2021 Doni Crosby
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -56,6 +57,14 @@
 #    define ISSI_PERSISTENCE 0
 #endif
 
+#ifndef ISSI_SWPULLUP
+#    define ISSI_SWPULLUP PUR_0R
+#endif
+
+#ifndef ISSI_CSPULLUP
+#    define ISSI_CSPULLUP PUR_0R
+#endif
+
 // Transfer buffer for TWITransmitData()
 uint8_t g_twi_transfer_buffer[20];
 
@@ -143,6 +152,10 @@ void IS31FL3737_init(uint8_t addr) {
 
     // Select PG3
     IS31FL3737_write_register(addr, ISSI_COMMANDREGISTER, ISSI_PAGE_FUNCTION);
+    // Set de-ghost pull-up resistors (SWx)
+    IS31FL3737_write_register(addr, ISSI_REG_SWPULLUP, ISSI_SWPULLUP);
+    // Set de-ghost pull-down resistors (CSx)
+    IS31FL3737_write_register(addr, ISSI_REG_CSPULLUP, ISSI_CSPULLUP);
     // Set global current to maximum.
     IS31FL3737_write_register(addr, ISSI_REG_GLOBALCURRENT, 0xFF);
     // Disable software shutdown.
diff --git a/drivers/led/issi/is31fl3737.h b/drivers/led/issi/is31fl3737.h
index 06886e9c9b..97917f1d4f 100644
--- a/drivers/led/issi/is31fl3737.h
+++ b/drivers/led/issi/is31fl3737.h
@@ -1,6 +1,7 @@
 /* Copyright 2017 Jason Williams
  * Copyright 2018 Jack Humbert
  * Copyright 2018 Yiancar
+ * Copyright 2021 Doni Crosby
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -47,6 +48,15 @@ void IS31FL3737_set_led_control_register(uint8_t index, bool red, bool green, bo
 void IS31FL3737_update_pwm_buffers(uint8_t addr1, uint8_t addr2);
 void IS31FL3737_update_led_control_registers(uint8_t addr1, uint8_t addr2);
 
+#define PUR_0R 0x00    // No PUR resistor
+#define PUR_05KR 0x01  // 0.5k Ohm resistor in t_NOL
+#define PUR_1KR 0x02   // 1.0k Ohm resistor in t_NOL
+#define PUR_2KR 0x03   // 2.0k Ohm resistor in t_NOL
+#define PUR_4KR 0x04   // 4.0k Ohm resistor in t_NOL
+#define PUR_8KR 0x05   // 8.0k Ohm resistor in t_NOL
+#define PUR_16KR 0x06  // 16k Ohm resistor in t_NOL
+#define PUR_32KR 0x07  // 32k Ohm resistor in t_NOL
+
 #define A_1 0x00
 #define A_2 0x01
 #define A_3 0x02
diff --git a/drivers/led/issi/is31fl3741.c b/drivers/led/issi/is31fl3741.c
index 24a273514e..5084f3b9fc 100644
--- a/drivers/led/issi/is31fl3741.c
+++ b/drivers/led/issi/is31fl3741.c
@@ -61,6 +61,14 @@
 #    define ISSI_PERSISTENCE 0
 #endif
 
+#ifndef ISSI_SWPULLUP
+#    define ISSI_SWPULLUP PUR_32KR
+#endif
+
+#ifndef ISSI_CSPULLUP
+#    define ISSI_CSPULLUP PUR_32KR
+#endif
+
 #define ISSI_MAX_LEDS 351
 
 // Transfer buffer for TWITransmitData()
@@ -157,7 +165,7 @@ void IS31FL3741_init(uint8_t addr) {
     // Set Golbal Current Control Register
     IS31FL3741_write_register(addr, ISSI_REG_GLOBALCURRENT, 0xFF);
     // Set Pull up & Down for SWx CSy
-    IS31FL3741_write_register(addr, ISSI_REG_PULLDOWNUP, 0x77);
+    IS31FL3741_write_register(addr, ISSI_REG_PULLDOWNUP, ((ISSI_CSPULLUP << 4) | ISSI_SWPULLUP));
 
     // IS31FL3741_update_led_scaling_registers(addr, 0xFF, 0xFF, 0xFF);
 
diff --git a/drivers/led/issi/is31fl3741.h b/drivers/led/issi/is31fl3741.h
index 163a035233..563022b9b0 100644
--- a/drivers/led/issi/is31fl3741.h
+++ b/drivers/led/issi/is31fl3741.h
@@ -51,6 +51,15 @@ void IS31FL3741_set_scaling_registers(const is31_led *pled, uint8_t red, uint8_t
 
 void IS31FL3741_set_pwm_buffer(const is31_led *pled, uint8_t red, uint8_t green, uint8_t blue);
 
+#define PUR_0R 0x00    // No PUR resistor
+#define PUR_05KR 0x01  // 0.5k Ohm resistor
+#define PUR_1KR 0x02   // 1.0k Ohm resistor
+#define PUR_2KR 0x03   // 2.0k Ohm resistor
+#define PUR_4KR 0x04   // 4.0k Ohm resistor
+#define PUR_8KR 0x05   // 8.0k Ohm resistor
+#define PUR_16KR 0x06  // 16k Ohm resistor
+#define PUR_32KR 0x07  // 32k Ohm resistor
+
 #define CS1_SW1 0x00
 #define CS2_SW1 0x01
 #define CS3_SW1 0x02