meson-vdec/Makefile at main · jefflessard/meson-vdec · GitHub

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# SPDX-License-Identifier: GPL-2.0
#
# Top-level Makefile for Amlogic Meson Video Decoder Driver
#

# Kernel source directory (can be overridden)
KDIR ?= /lib/modules/$(shell uname -r)/build

# Module source directory
MDIR := drivers/media/platform/amlogic/meson-vdec

# Default codec configuration (can be overridden via environment variables)
CONFIG_VIDEO_MESON_VDEC ?= m
# CONFIG_VIDEO_MESON_AMRISC_MONITOR ?= y

# Build configuration string
CONFIG += CONFIG_VIDEO_MESON_VDEC=$(CONFIG_VIDEO_MESON_VDEC)
CONFIG += CONFIG_VIDEO_MESON_AMRISC_MONITOR=$(CONFIG_VIDEO_MESON_AMRISC_MONITOR)

KBUILD_EXTRA_SYMBOLS := $(KDIR)/drivers/media/v4l2-core/Module.symvers
KDIR_UPDATES ?= /lib/modules/$(shell uname -r)/updates

# Default target
all: modules

# v4l2-h264 hack for out-of-tree v4l2 drivers
v4l2-h264:
	$(MAKE) -j$(shell nproc) -C $(KDIR) M=$(KDIR)/drivers/media/v4l2-core CONFIG_V4L2_H264=m modules
	mkdir -p $(KDIR_UPDATES) && cp $(KDIR)/drivers/media/v4l2-core/v4l2-h264.ko $(KDIR_UPDATES)

# Build kernel modules
modules:
	$(MAKE) -j$(shell nproc) -C $(KDIR) M=$(PWD)/$(MDIR) KBUILD_EXTRA_SYMBOLS=$(KBUILD_EXTRA_SYMBOLS) $(CONFIG) modules

# Clean build artifacts
clean:
	$(MAKE) -C $(KDIR) M=$(PWD)/$(MDIR) $(CONFIG) clean
	find . -name "*.o" -o -name "*.ko" -o -name "*.mod*" -o -name ".*.cmd" \
		-o -name "Module.symvers" -o -name "modules.order" | xargs rm -f
	rm -rf .tmp_versions/

# Install modules (requires root)
modules_install:
	$(MAKE) -C $(KDIR) M=$(PWD)/$(MDIR) $(CONFIG) modules_install

# Load module (requires root)
load:
	sudo insmod $(MDIR)/meson-vdec.ko

# Unload module (requires root)
unload:
	sudo rmmod meson-vdec

# Reload module (requires root)
reload: unload load

# Check kernel coding style
checkpatch:
	scripts/checkpatch.pl --no-tree -f $(MDIR)/*.c $(MDIR)/*.h

# Run sparse static analysis
sparse:
	$(MAKE) -C $(KDIR) M=$(PWD)/$(MDIR) CONFIG_VIDEO_MESON_VDEC=m C=2 CF="-D__CHECK_ENDIAN__" modules

# Help target
help:
	@echo "Available targets:"
	@echo "  all           - Build kernel modules (default)"
	@echo "  modules       - Build kernel modules"
	@echo "  clean         - Clean build artifacts"
	@echo "  modules_install - Install modules to system"
	@echo "  load          - Load meson-vdec module"
	@echo "  unload        - Unload meson-vdec module"
	@echo "  reload        - Unload and reload module"
	@echo "  checkpatch    - Check kernel coding style"
	@echo "  v4l2-h264     - Build and install v4l2-h264.ko (needed once)"
	@echo "  sparse        - Run sparse static analysis"
	@echo "  help          - Show this help message"
	@echo ""
	@echo "Variables:"
	@echo "  KDIR                        - Kernel source directory (default: /lib/modules/\$$(uname -r)/build)"
	@echo "  CONFIG_VIDEO_MESON_VDEC     - Main driver (default: m)"

.PHONY: all modules clean modules_install load unload reload checkpatch sparse help