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ti-bsp: recipes-multimedia: Add udev rules for VPU and JPEG encoder symlinks

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This patch introduces udev rules to ensure consistent device naming for
VPU decoders, encoders, and the JPEG encoder. These rules are essential
for enabling hardware-accelerated video decoding in Chromium using the
V4L2 Stateful decoder.

The following udev rules are added:
- Map vpu and vpu0 to /dev/video-dec0 and /dev/video-enc0.
- Map vpu1 to /dev/video-dec1 and /dev/video-enc1.
- Map the JPEG encoder to /dev/jpeg-enc0.

These changes ensure proper operation of the VPU and JPEG encoder,
especially when other video devices are connected, avoiding mismatches.

Signed-off-by: Thorsten Lannynd <t-lannynd@ti.com>
Reviewed-by: Andrew Davis <afd@ti.com>
Signed-off-by: Ryan Eatmon <reatmon@ti.com>
This commit is contained in:
Thorsten Lannynd
2025-08-25 14:28:39 -05:00
committed by Ryan Eatmon
parent 7e27eb1dd3
commit e0a249bb34
4 changed files with 22 additions and 0 deletions
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2
meta-ti-bsp/recipes-bsp/cnm-wave-fw/cnm-wave-fw_git.bb
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@@ -27,3 +27,5 @@ do_install() {
install -d ${D}${nonarch_base_libdir}/firmware/cnm
install -m 0644 ${S}/cnm/${SOURCE_WAVE521C} ${D}${nonarch_base_libdir}/firmware/cnm/${TARGET_WAVE521C}
}
RDEPENDS:${PN} += "ti-multimedia-udev"

2
meta-ti-bsp/recipes-bsp/ti-img-encode-decode/ti-vxe-vxd-driver_6.12.bb
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@@ -19,3 +19,5 @@ SRCREV = "0bcbb20af32ea13275b452f0e84f5a49966d0bf6"
TARGET_PRODUCT:j721e = "j721e_linux"
EXTRA_OEMAKE += 'KERNEL_DIR="${STAGING_KERNEL_DIR}" PREFIX="${D}"'
RDEPENDS:${PN} += "ti-multimedia-udev"

5
meta-ti-bsp/recipes-multimedia/ti-multimedia-udev/files/67-multimedia.rules Normal file
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@@ -0,0 +1,5 @@
SUBSYSTEM=="video4linux", DEVPATH=="/devices/*/*210000.video-codec/video4linux/video*", ATTR{name}=="C&M Wave5 VPU decoder", SYMLINK+="video-dec0"
SUBSYSTEM=="video4linux", DEVPATH=="/devices/*/*210000.video-codec/video4linux/video*", ATTR{name}=="C&M Wave5 VPU encoder", SYMLINK+="video-enc0"
SUBSYSTEM=="video4linux", DEVPATH=="/devices/*/4220000.video-codec/video4linux/video*", ATTR{name}=="C&M Wave5 VPU decoder", SYMLINK+="video-dec1"
SUBSYSTEM=="video4linux", DEVPATH=="/devices/*/4220000.video-codec/video4linux/video*", ATTR{name}=="C&M Wave5 VPU encoder", SYMLINK+="video-enc1"
SUBSYSTEM=="video4linux", DEVPATH=="/devices/*/fd20000.jpeg-encoder/video4linux/video*", ATTR{name}=="e5010", SYMLINK+="jpeg-enc0"

13
meta-ti-bsp/recipes-multimedia/ti-multimedia-udev/ti-multimedia-udev.bb Normal file
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@@ -0,0 +1,13 @@
SUMMARY = "Udev rules for device naming of VPU devices and JPEG encoder"
LICENSE = "MIT"
LIC_FILES_CHKSUM = "file://${COREBASE}/meta/COPYING.MIT;md5=3da9cfbcb788c80a0384361b4de20420"
SRC_URI += "file://67-multimedia.rules"
S = "${UNPACKDIR}"
do_install() {
install -d ${D}${sysconfdir}/udev/rules.d
install -m 0644 ${UNPACKDIR}/67-multimedia.rules ${D}${sysconfdir}/udev/rules.d/
}