Fix multicolor problem on 5.9 or older kernels

Makefile

@@ -1,5 +1,5 @@
 PACKAGE=playstation-joy-dkms
-VERSION=20220316-1
+VERSION=20220317-1-multicolor
 DEB_BUILD_PATH=build/$(PACKAGE)_$(VERSION)
 DKMS_SRC_PATH=build/$(PACKAGE)_$(VERSION)/usr/src/$(PACKAGE)-$(VERSION)
 
@@ -25,14 +25,26 @@ prepare:
 	mkdir -p $(DEB_BUILD_PATH)/DEBIAN
 	mkdir -p $(DKMS_SRC_PATH)
 # generate config and scripts from templates
-	sed -e "s/@@PACKAGE@@/$(PACKAGE)/g" -e "s/@@VERSION@@/$(VERSION)/g" dkms-template.conf > $(DKMS_SRC_PATH)/dkms.conf
-	sed -e "s/@@PACKAGE@@/$(PACKAGE)/g" -e "s/@@VERSION@@/$(VERSION)/g" control-template > $(DEB_BUILD_PATH)/DEBIAN/control
-	sed -e "s/@@PACKAGE@@/$(PACKAGE)/g" -e "s/@@VERSION@@/$(VERSION)/g" pre-uninstall-template.sh > $(DEB_BUILD_PATH)/DEBIAN/prerm
+	sed -e "s/@@PACKAGE@@/$(PACKAGE)/g" -e "s/@@VERSION@@/$(VERSION)/g" dkms-template.conf > $(DKMS_SRC_PATH)/dkms.conf; \
+	sed -e "s/@@PACKAGE@@/$(PACKAGE)/g" -e "s/@@VERSION@@/$(VERSION)/g" control-template > $(DEB_BUILD_PATH)/DEBIAN/control; \
+	sed -e "s/@@PACKAGE@@/$(PACKAGE)/g" -e "s/@@VERSION@@/$(VERSION)/g" pre-uninstall-template.sh > $(DEB_BUILD_PATH)/DEBIAN/prerm; \
 	sed -e "s/@@PACKAGE@@/$(PACKAGE)/g" -e "s/@@VERSION@@/$(VERSION)/g" post-install-template.sh > $(DEB_BUILD_PATH)/DEBIAN/postinst
 	chmod 0555 $(DEB_BUILD_PATH)/DEBIAN/prerm
 	chmod 0555 $(DEB_BUILD_PATH)/DEBIAN/postinst
 # copy src
-	cp -v src/playstation-joy-dkms/* $(DKMS_SRC_PATH)/
+	if [ "$$INCLUDE_LED_CLASS_MULTICOLOR" = true ] ; then \
+		echo Applying LED class multicolor patches; \
+		patch -u src/linux/drivers/hid/hid-playstation.c patches/0091-hid-playstation-use-our-multicolor.patch; \
+		patch -u src/linux/include/linux/led-class-multicolor.h patches/0092-enable-led-class-multicolor.patch; \
+		patch -u src/linux/drivers/leds/led-class-multicolor.c patches/0093-led-class-multicolor-source-fix-header.patch; \
+		echo Copying led-class-multicolor files; \
+		cp -v src/playstation-joy-dkms/leds.h $(DKMS_SRC_PATH)/; \
+		cp -v src/playstation-joy-dkms/led-class-multicolor.* $(DKMS_SRC_PATH)/; \
+		cp -v src/playstation-joy-dkms/Makefile.multicolor $(DKMS_SRC_PATH)/Makefile; \
+	else \
+		cp -v src/playstation-joy-dkms/Makefile.default $(DKMS_SRC_PATH)/Makefile; \
+	fi
+	cp -v src/playstation-joy-dkms/hid-* $(DKMS_SRC_PATH)/
 # copy modprobe config
 	mkdir -p $(DEB_BUILD_PATH)/etc/modprobe.d
 	cp -v playstation-joy-dkms.conf $(DEB_BUILD_PATH)/etc/modprobe.d/

README.md

@@ -38,6 +38,12 @@ sudo apt-get update
 sudo apt-get build-dep linux linux-image-$(uname -r)
 ```
 
+> ::warning:: If you are using a kernel version below `5.9`, you must use the deb package ending with `-multicolor`.
+> `5.9` kernels or older has no support for the LED class multicolor. This flag includes the patches and kernels for that.
+
+> ::warning:: If you are using a kernel version higher or equal to `5.9`, you must **NOT** use the `-multicolor` package to avoid conflicts with the existing `led-class-multicolor` module.
+> You can check by doing `modinfo led-class-multicolor` 
+
 4. Download latest release from [here](https://github.com/m2robocon/playstation-joy-dkms/releases/latest), or build it yourself using the instructions below.
 
 5. Install required `playstation-joy-dkms` dependencies
@@ -95,6 +101,8 @@ PACKAGE=playstation-joy-dkms
 VERSION=20220314-1
 ```
 
+If you used the `INCLUDE_LED_CLASS_MULTICOLOR=true` flag, make sure to add `-multicolor` to the back of the version string to indicate it.
+
 4. Package it with `make`
 
 ```bash
@@ -104,7 +112,11 @@ make deb # package into deb
 
 # or simply:
 
+# normal packaging without led-class-multicolor
 make all
+
+# package with led-class-multicolor
+INCLUDE_LED_CLASS_MULTICOLOR=true make all
 ```
 
 ## What files are they?

patches/0091-hid-playstation-use-our-multicolor.patch

@@ -0,0 +1,11 @@
+--- hid-playstation-joy-old.c	2022-03-16 19:32:42.637553700 +0000
++++ hid-playstation-joy.c	2022-03-16 19:07:41.529202002 +0000
+@@ -12,7 +12,7 @@
+ #include <linux/idr.h>
+ #include <linux/input/mt.h>
+ #include <linux/leds.h>
+-#include <linux/led-class-multicolor.h>
++#include "led-class-multicolor.h"
+ #include <linux/module.h>
+
+ #include <asm/unaligned.h>

patches/0092-enable-led-class-multicolor.patch

@@ -0,0 +1,12 @@
+--- led-class-multicolor-old.h	2022-03-16 19:06:09.468540801 +0000
++++ led-class-multicolor.h	2022-03-16 19:33:18.023039699 +0000
+@@ -30,7 +30,7 @@
+ 	return container_of(led_cdev, struct led_classdev_mc, led_cdev);
+ }
+
+-#if IS_ENABLED(CONFIG_LEDS_CLASS_MULTICOLOR)
++#if 1
+ /**
+  * led_classdev_multicolor_register_ext - register a new object of led_classdev
+  *				      class with support for multicolor LEDs
+

patches/0093-led-class-multicolor-source-fix-header.patch

@@ -0,0 +1,11 @@
+--- led-class-multicolor-old.c	2022-03-16 19:06:04.611023929 +0000
++++ led-class-multicolor.c	2022-03-16 19:08:24.118355092 +0000
+@@ -5,7 +5,7 @@
+
+ #include <linux/device.h>
+ #include <linux/init.h>
+-#include <linux/led-class-multicolor.h>
++#include "led-class-multicolor.h"
+ #include <linux/module.h>
+ #include <linux/slab.h>
+ #include <linux/uaccess.h>

src/playstation-joy-dkms/Makefile.multicolor

@@ -0,0 +1,14 @@
+CONFIG_MODULE_SIG=n
+
+obj-m += hid-playstation-joy.o hid-sony-joy.o led-class-multicolor.o
+
+KERNEL_SRC ?= /lib/modules/$(shell uname -r)/build
+
+all:
+	$(MAKE) -C $(KERNEL_SRC) V=0 M=$$PWD
+
+install:
+	cp -v *.ko $(DESTDIR)/
+
+clean:
+	rm -rf deps.h *.o *.ko *.mod.c *.symvers *.order .*.cmd .tmp_versions

src/playstation-joy-dkms/led-class-multicolor.c

@@ -0,0 +1 @@
+../linux/drivers/leds/led-class-multicolor.c

src/playstation-joy-dkms/led-class-multicolor.h

@@ -0,0 +1 @@
+../linux/include/linux/led-class-multicolor.h

src/playstation-joy-dkms/leds.h

@@ -0,0 +1 @@
+../linux/drivers/leds/leds.h