[openwrt/openwrt] kernel: add support for imx vpu

[LEDE Commits]

xback pushed a commit to openwrt/openwrt.git, branch master:
https://git.openwrt.org/7a726297a7bad1a71e17dcebf0849f0da0468d40

commit 7a726297a7bad1a71e17dcebf0849f0da0468d40
Author: Koen Vandeputte <koen.vandeputte at citymesh.com>
AuthorDate: Wed Jul 5 13:19:28 2023 +0200

    kernel: add support for imx vpu
    
    This adds support for the Video Processing Unit IP block
    which is present in certain i.MX SOC's.
    
    The vpu used in imx6 is the coda960 which supports:
    - h264 enc
    - h264 dec
    - jpeg enc
    - jpeg dec
    
    Please note that the required firmware needs to be added
    by yourself as it's not available currently in linux-firmware upstream.
    
    The firmware package can be found on the internet
    and it will decompress itself exposing all binaries
    after accepting the EULA.
    
    The binaries should be placed at exactly these paths:
    
    - /lib/firmware/vpu_fw_imx6d.bin
    - /lib/firmware/vpu_fw_imx6q.bin
    
    Following output will be printed at boottime if all is well:
    
    [    9.769638] coda 2040000.vpu: Firmware code revision: 46076
    [    9.775277] coda 2040000.vpu: Initialized CODA960.
    [    9.780082] coda 2040000.vpu: Firmware version: 3.1.1
    [    9.785312] coda 2040000.vpu: coda-jpeg-encoder registered as video0
    [    9.791859] coda 2040000.vpu: coda-jpeg-decoder registered as video1
    [    9.798375] coda 2040000.vpu: coda-video-encoder registered as video2
    [    9.805013] coda 2040000.vpu: coda-video-decoder registered as video3
    
    gstreamer will automatically detect and use all encoders/decoders.
    
    Please note that a FILES catch-all is required for the videobuf-dma objects
    as some modules enabling this could require (and thus generating) only 1 of them.
    
    Signed-off-by: Koen Vandeputte <koen.vandeputte at citymesh.com>
---
 package/kernel/linux/modules/video.mk | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/package/kernel/linux/modules/video.mk b/package/kernel/linux/modules/video.mk
index 68a1d32e76..7dfeec9d91 100644
--- a/package/kernel/linux/modules/video.mk
+++ b/package/kernel/linux/modules/video.mk
@@ -1085,3 +1085,23 @@ define KernelPackage/video-dma/description
 endef
 
 $(eval $(call KernelPackage,video-dma))
+
+define KernelPackage/video-coda
+  TITLE:=i.MX VPU support
+  DEPENDS:=@(TARGET_imx&&!TARGET_imx_cortexa7) +kmod-video-mem2mem +kmod-video-dma
+  KCONFIG:= \
+  	CONFIG_VIDEO_CODA \
+  	CONFIG_VIDEO_IMX_VDOA
+  FILES:= \
+  	$(LINUX_DIR)/drivers/media/$(V4L2_MEM2MEM_DIR)/coda/coda-vpu.ko \
+  	$(LINUX_DIR)/drivers/media/$(V4L2_MEM2MEM_DIR)/coda/imx-vdoa.ko \
+ 	$(LINUX_DIR)/drivers/media/$(V4L2_DIR)/v4l2-jpeg.ko
+  AUTOLOAD:=$(call AutoProbe,coda-vpu imx-vdoa v4l2-jpeg)
+  $(call AddDepends/video)
+endef
+
+define KernelPackage/video-coda/description
+ The i.MX Video Processing Unit (VPU) kernel module
+endef
+
+$(eval $(call KernelPackage,video-coda))