Add k230 vpu driver

arch/riscv/boot/dts/canaan/k230.dtsi

@@ -384,6 +384,16 @@
 			status = "disabled";
 		};
 
+		vpu: vpu@0x90400000 {
+			status              = "okay";
+			compatible          = "canaan,vpu";
+			reg                 = <0x0 0x90400000 0x0 0x10000>;
+			interrupts          = <132 IRQ_TYPE_LEVEL_HIGH>;
+			power-domains       = <&sysctl_power K230_PM_DOMAIN_VPU>;
+			clocks              = <&vpu_src>;
+			clock-names         = "vpu";
+		};
+
 		gpu: gpu@90800000 {
 			compatible = "verisilicon,gc8000ul";
 			reg = <0x0 0x90800000 0x0 0x1000>;

arch/riscv/configs/k230_defconfig

@@ -279,3 +279,8 @@ CONFIG_TOUCHSCREEN_EDT_FT5X06=y
 CONFIG_INPUT_EVDEV=y
 CONFIG_GPU_VGLITE=y
 CONFIG_BACKLIGHT_CLASS_DEVICE=y
+CONFIG_I2C=y
+CONFIG_MEDIA_SUPPORT=y
+CONFIG_MEDIA_PLATFORM_SUPPORT=y
+CONFIG_V4L_PLATFORM_DRIVERS=y
+CONFIG_VPU_CANAAN=y

drivers/media/platform/Kconfig

@@ -85,5 +85,6 @@ source "drivers/media/platform/ti/Kconfig"
 source "drivers/media/platform/verisilicon/Kconfig"
 source "drivers/media/platform/via/Kconfig"
 source "drivers/media/platform/xilinx/Kconfig"
+source "drivers/media/platform/canaan/vpu/Kconfig"
 
 endif # MEDIA_PLATFORM_DRIVERS

drivers/media/platform/Makefile

@@ -28,6 +28,7 @@ obj-y += ti/
 obj-y += verisilicon/
 obj-y += via/
 obj-y += xilinx/
+obj-y += canaan/vpu/
 
 # Please place here only ancillary drivers that aren't SoC-specific
 # Please keep it alphabetically sorted by Kconfig name

drivers/media/platform/canaan/vpu/Kconfig

@@ -0,0 +1,38 @@
+config VPU_CANAAN
+	tristate "Linlon VPU support."
+	depends on VIDEO_DEV
+	depends on COMMON_CLK && HAS_DMA
+	select VIDEO_V4L2_SUBDEV_API
+	select VIDEOBUF2_DMA_CONTIG
+	select V4L_MEM2MEM_DRIVERS
+	select V4L2_FWNODE
+	select VIDEOBUF2_DMA_SG
+	default y
+	help
+	  This is a v4l2 driver for Canaan video codec.
+	  Canaan video codec is video decoder and encoder hardware unit.
+	  It accelerates video decoder and encoder operations, such as h264, hevc,
+	  jpeg formats.
+	  To compile this driver as a module choose m here.
+
+config VPU_CANAAN_FTRACE
+	depends on VPU_CANAAN
+	bool "Send kernel space logs to ftrace."
+	default n
+	help
+	  This is a v4l2 driver for Canaan video codec.
+	  Canaan video codec is video decoder and encoder hardware unit.
+	  It accelerates video decoder and encoder operations, such as h264, hevc,
+	  jpeg formats. Send kernel space logs to ftrace.
+	  To compile this driver as a module choose m here.
+
+config VPU_CANAAN_PRINT_FILE
+	depends on VPU_CANAAN
+	bool "Append file and line number to kernel space log messages."
+	default y
+	help
+	  This is a v4l2 driver for Canaan video codec.
+	  Canaan video codec is video decoder and encoder hardware unit.
+	  It accelerates video decoder and encoder operations, such as h264, hevc,
+	  jpeg formats. Append file and line number to kernel space log messages.
+	  To compile this driver as a module choose m here.

drivers/media/platform/canaan/vpu/Makefile

@@ -0,0 +1,58 @@
+#############################################if/##############
+# Set the include-path according to the defined interface.
+###########################################################
+
+ccflags-y += -I$(src) -I$(src)/if -I$(src)/dev -I$(src)/if/v4l2 -I$(src)/external
+ccflags-$(CONFIG_VPU_CANAAN_FTRACE) += -DMVX_LOG_FTRACE_ENABLE
+ccflags-$(CONFIG_VPU_CANAAN_PRINT_FILE) += -DMVX_LOG_PRINT_FILE_ENABLE
+ccflags-y += $(EXTRA_CCFLAGS)
+
+###########################################################
+# Define build targets and what files to include.
+###########################################################
+
+# Amvx module
+obj-$(CONFIG_VPU_CANAAN) := amvx.o
+
+# Add objects for if module.
+if-y := mvx_if.o \
+	mvx_buffer.o \
+	mvx_firmware_cache.o \
+	mvx_firmware.o \
+	mvx_firmware_v2.o \
+	mvx_firmware_v3.o \
+	mvx_mmu.o \
+	mvx_secure.o \
+	mvx_session.o \
+	fw_jpegenc.o \
+	fw_jpegdec.o \
+	fw_h264enc.o \
+	fw_h264dec.o \
+	fw_hevcenc.o \
+	fw_hevcdec.o
+
+# Add external interface.
+if-y += mvx_ext_v4l2.o \
+	mvx_v4l2_buffer.o \
+	mvx_v4l2_session.o \
+	mvx_v4l2_vidioc.o \
+	mvx_v4l2_fops.o \
+	mvx_v4l2_ctrls.o
+
+# Add objects for dev module.
+dev-y := mvx_dev.o \
+	 mvx_hwreg.o \
+	 mvx_hwreg_v500.o \
+	 mvx_hwreg_v550.o \
+	 mvx_hwreg_v61.o \
+	 mvx_hwreg_v52_v76.o \
+	 mvx_lsid.o \
+	 mvx_scheduler.o \
+	 mvx_pm_runtime.o
+
+# Add driver objects.
+amvx-y := mvx_driver.o \
+	  mvx_seq.o \
+	  mvx_log.o \
+	  mvx_log_group.o \
+	  $(if-y) $(dev-y)