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kernel: add support for tw686x frame grabbers

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Adds support for Intersil/Techwell tw686x frame grabbers.

By default, this module uses MEMCPY to transfer data.
Let's switch to "Contiguous DMA" which is the fastest
performing method available.

[   10.074349] tw6869: PCI 0000:07:00.0, IRQ 33, MMIO 0x1200000 (contig mode)
[   10.081381] tw686x 0000:07:00.0: enabling device (0140 -> 0142)

Signed-off-by: Koen Vandeputte <koen.vandeputte@citymesh.com>
This commit is contained in:
Koen Vandeputte
2023-06-07 11:58:52 +02:00
parent a9a872b9d4
commit bc91784f26
1 changed files with 20 additions and 0 deletions
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20
package/kernel/linux/modules/video.mk
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@@ -439,6 +439,10 @@ $(AddDepends/video)
CONFIG_MEDIA_CAMERA_SUPPORT=y
endef
define AddDepends/framegrabber
$(AddDepends/video)
KCONFIG+=CONFIG_MEDIA_PCI_SUPPORT=y
endef
define KernelPackage/video-videobuf2
TITLE:=videobuf2 lib
@@ -1122,3 +1126,19 @@ define KernelPackage/video-pxp/description
endef
$(eval $(call KernelPackage,video-pxp))
define KernelPackage/video-tw686x
TITLE:=TW686x support
DEPENDS:=@PCIE_SUPPORT +kmod-video-dma +kmod-sound-core
KCONFIG:= CONFIG_VIDEO_TW686X
FILES:= $(LINUX_DIR)/drivers/media/pci/tw686x/tw686x.ko
AUTOLOAD:=$(call AutoProbe,tw686x)
MODPARAMS.tw686x:=dma_mode=contig
$(call AddDepends/framegrabber)
endef
define KernelPackage/video-tw686x/description
The Intersil/Techwell TW686x kernel module
endef
$(eval $(call KernelPackage,video-tw686x))