board: add R69 XR821 (RK3528 TV box) - #10440
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Included review availability: Your plan includes up to 8 reviews per rolling hour; 7 remain after this review. 📝 WalkthroughWalkthroughAdds the R69 XR821 RK35xx board target with build metadata, boot settings, kernel options, configurable serial-console routing, and BSP runtime files for LEDs, power keys, input names, Bluetooth rfkill, and VPU permissions. ChangesR69 XR821 board support
Estimated code review effort: 3 (Moderate) | ~20 minutes Merge Risk: 🔵 Low · up to The PR adds support for the R69 XR821 and changes shared rk35xx kernel configuration behavior; board-local configuration may fragment the shared vendor kernel-package contract. The change is otherwise mergeable, but maintainers should resolve or explicitly accept this bounded packaging and integration risk. Sequence Diagram(s)sequenceDiagram
participant BoardConfig
participant BootEnvironment
participant BootScript
participant LinuxKernel
BoardConfig->>BootEnvironment: select R69 XR821 boot values
BootEnvironment->>BootScript: provide serialcon
BootScript->>LinuxKernel: pass configurable console arguments
Possibly related PRs
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Inline comments:
In `@config/boards/r69-xr821.tvb`:
- Around line 28-31: Remove custom_kernel_config__r69_xr821 and its
r69-xr821-specific kernel configuration hash from the board file. Add
CONFIG_SERIAL_DEV_CTRL_TTYPORT, CONFIG_BT_HCIUART_H4, and
CONFIG_ROCKCHIP_CPUINFO to the shared rk35xx LINUXFAMILY/BOARDFAMILY kernel
configuration, preserving these options for all boards using that family.
In `@packages/bsp/rk35xx/rfkill-bt.rules`:
- Line 4: Add ACTION=="add" to the Bluetooth rfkill rule so ATTR{soft}="0" runs
only during device creation, while preserving the existing subsystem, type, and
unblocking behavior.
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config/boards/r69-xr821.tvbconfig/bootenv/r69-xr821.txtconfig/bootscripts/boot-rk35xx.cmdpackages/bsp/rk35xx/input-names.rulespackages/bsp/rk35xx/power-state-ledspackages/bsp/rk35xx/powerkey.confpackages/bsp/rk35xx/rfkill-bt.rulespackages/bsp/rk35xx/vpu.rules
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(copy from armbian/linux-rockchip#528 (review) for visibility here)
Guess I already said similar elsewhere, but again: adding decompiled DTB->DTS (with phandles) is (IMHO) going too far.
My suggestion is, find the similar-est proper DTS, compile to DTB, decompile it, then compare with the R69-decompiled one, and produce a "proper" DTS. Armbian's ./compile BOARD=x BRANCH=y kernel-dtb (ran on recent-enough dtc) produces helpful preprocessed/sorted/phandle-removed versions in output/ exactly for this purpose.
Rockchip RK3518A, RK3528 family: 2 GB DDR4, 16 GB eMMC, microSD, 100M
Ethernet, AIC8800D80 SDIO Wi-Fi with UART Bluetooth, USB2, USB3, HDMI,
AV jack and an IR receiver.
Named for the PCB silkscreen XR821_V1.1 - sunvell-r69 is already taken
by an unrelated Allwinner box, and these boxes vary between production
runs.
The DTS and the driver fixes are separate PRs against
armbian/linux-rockchip.
Two shared files change.
boot-rk35xx.cmd gains a serialcon variable defaulting to the ttyS2 it
hardcoded before, so every other board's cmdline is unchanged. This box
needs ttyS0: its DTB disables fiq-debugger to free UART0, and ttyS2 is
the Bluetooth UART.
linux-rk35xx-vendor.config gains three options. They started as a
board-level custom_kernel_config, which forked the shared rk35xx kernel
package for one board; two of the three are gaps in the family config
rather than board quirks:
SERIAL_DEV_CTRL_TTYPORT SERIAL_DEV_BUS=y was already set without its
only controller, so no serdev device could
bind on any rk35xx board.
BT_HCIUART_H4 BCSP, ATH3K, INTEL, BCM, RTL, QCA and AG6XX
are all enabled, but not the most basic
protocol.
ROCKCHIP_CPUINFO m to y: as a module it can load after
aic8800_sdio, which derives its MAC from
system_serial_high/low - zero at that point,
so the address is regenerated every boot.
Signed-off-by: Artem Butusov <art.sormy@gmail.com>
3 participants
Adds the R69 XR821, a 2 GB / 16 GB RK3518A (RK3528 family) TV box.
Named for the PCB silkscreen
XR821_V1.1;sunvell-r69is taken by an unrelatedAllwinner box, and these boxes vary between production runs.
Sold under several brands, ~$35 on AliExpress and Amazon, ~$15 on Alibaba.
Every code change is a separate PR:
905020444Two shared files
config/bootscripts/boot-rk35xx.cmdgainsserialcon, defaulting to thettyS2it hardcoded before, so no other board's cmdline changes. This box needs
ttyS0:its DTB disables fiq-debugger to free UART0, and ttyS2 is the Bluetooth UART.
config/kernel/linux-rk35xx-vendor.configgains three options. They started as aboard-level
custom_kernel_config— the only one in the tree — which forked theshared rk35xx kernel package for one board:
SERIAL_DEV_CTRL_TTYPORT=ySERIAL_DEV_BUS=ywas set without its only controller, so no serdev device could bind on any rk35xx boardBT_HCIUART_H4=yROCKCHIP_CPUINFOm→yaic8800_sdio, which derives its MAC fromsystem_serial_high/low; zero at that point, so the address is regenerated every bootSame values this board already shipped with, so its kernel is unchanged.
Tested
graphical.targetstress-ng --vm --verifypassed 2 / failed 0, 57 °CttyS0at 1500000, serial and displayhci0UP RUNNING over UART serdev, stable BD address,btmgmt findreturns 200+ devices, bundled remote pairs and survives a rebootuas; 389 / 360 MB/sglmark2-es2-drmscore 41 at 2048x1152ffprobe/dev/mpp_serviceand/dev/rgaareroot:video 0660adc-keysnode; also the maskrom triggerpowerandstandby, driven across poweroff and suspendRuntimeWatchdogSecis set,wdctlthen reports it busystress-ng, no throttling (95 °C trip)PM: suspend entry (deep), resumes on the remotestress-ng --vm --verifycleanu-boot.itbchanged, idbloader and theDVKR/SSKRvendor stores byte-identical2207:350cover USB A-to-ANo AV1 decoder: the factory device tree has no AV1 block, and MPP refuses it with
unable to create dec av1 for soc rk3528a unsupported.Not tested, or not possible
HDMI-CEC, 4K60 and EDID mode list, HDMI hotplug re-detect, USB bus power for a
self-spinning drive, SD hotplug removal, the IR-extender jack, A2DP.
AV jack: the analog codec enumerates as ALSA card
rk3528acodec, untestedthrough the jack. Composite video is not reachable —
tve@ff880000is enabledbut DRM exposes only HDMI-A-1 and Writeback-1, with no TV-out connector.
Wi-Fi throughput is not quoted: only a Wi-Fi peer was available and repeat runs
varied between 33 and 115 Mbit/s. Ethernet was measured against a wired peer.
Wake-on-LAN cannot work: the PHY is inside the SoC (
phy-is-integrated, nophy-supply), so deep suspend powers it down. There is no RTC either.Every row above was run on this box, probably more coverage than most boards
arrive with. Worklog, DTB rationale, codec matrix and measurements:
https://github.com/sormy/rk35xx-tvbox-armbian/tree/main/docs/r69
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