RPI 4B: rpi_hevc_dec broke HEVC decoding

This is for ARMv8 based devices

RPI 4B: rpi_hevc_dec broke HEVC decoding

Postby mobin2008 » Thu Jul 31, 2025 11:36 am

Hi. After upgrading linux-rpi from 6.12.13 to 6.12.33 which replaces rpivid with rpi_hevc_dec, rpi_hevc_dec is not automatically loaded into system and after manual modprobe, It does nothing, no logs in dmesg, no /dev/video \ /dev/media interface.

I use Armtix which is Alarm without systemd. linux-rpi package in Armtix is derived from Alarm with minimal changes to config which are in this patch:make_clickable_callback(MAGIC_URL_FULL, ' ', 'https://gitlab.com/phkr/artixarm/-/blob/master/system/linux-rpi/armtix-config.patch?ref_type=heads', '', ' class="postlink"')

Anybody else has similar problem? Currently I downgraded to 6.12.13 as a workaround until finding out what's the problem.

/boot/config.txt:
[code]
enable_uart=1

# Smooth Kodi
arm_boost=1
force_turbo=1

dtoverlay=disable-wifi

[all]
include kodi.config.txt
[/code]

/boot/boot.txt:
[code]
setenv bootargs root=/dev/sda2 rw rootwait console=serial0,115200 console=tty1 fsck.repair=yes usb-storage.quirks=125f:a88a:u
load ${devtype} ${devnum}:${bootpart} ${kernel_addr_r} /rpi4Image
load ${devtype} ${devnum}:${bootpart} ${ramdisk_addr_r} /initramfs-linux-rpi4.uimg
booti ${kernel_addr_r} ${ramdisk_addr_r}:${filesize} ${fdt_addr}
[/code]

raspinfo (including full dmesg):make_clickable_callback(MAGIC_URL_FULL, ' ', 'https://paste.ubuntu-ir.org/nnl', '', ' class="postlink"')

Version of related packages to booting my RPI 4B:
[code]
local/linux-rpi 6.12.33-1
Linux kernel and modules (RPi Foundation fork)
local/firmware-raspberrypi 20240831-2
Additional firmware for Raspberry Pi
local/raspberrypi-bootloader 20250725-1
Bootloader files for Raspberry Pi
local/uboot-raspberrypi 2025.01-1
U-Boot for Raspberry Pi
[/code]

Regrads

Post in Armtix forum about this issue:make_clickable_callback(MAGIC_URL_FULL, ' ', 'https://forum.artixlinux.org/index.php/topic,8164.0.html', '', ' class="postlink"')
Post in Raspberry Pi forum about this issue:make_clickable_callback(MAGIC_URL_FULL, ' ', 'https://forums.raspberrypi.com/viewtopic.php?t=390392', '', ' class="postlink"')
mobin2008
 
Posts: 4
Joined: Sun Jan 19, 2025 9:33 pm

Re: RPI 4B: rpi_hevc_dec broke HEVC decoding

Postby mobin2008 » Thu Jul 31, 2025 2:40 pm

Admins please move this to software/armv8, I accidentally posted it in hardware sub. (Or I will just open another post in software/armv8 if it's not possible). Sorry.
mobin2008
 
Posts: 4
Joined: Sun Jan 19, 2025 9:33 pm

Re: RPI 4B: rpi_hevc_dec broke HEVC decoding

Postby mobin2008 » Fri Aug 01, 2025 10:27 am

Looks like the issue is because of broken Alarm/Armtix dtb files in linux-rpi after replacing bcm2711-rpi-4-b.dtb file frommake_clickable_callback(MAGIC_URL_FULL, ' ', 'https://github.com/raspberrypi/firmware/raw/7e15dd42411d4185290b66eb9ccc581bebb04bf2/boot/bcm2711-rpi-4-b.dtb', '', ' class="postlink"') the issue get fixed.
mobin2008
 
Posts: 4
Joined: Sun Jan 19, 2025 9:33 pm


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