Hi Quentin,
On 11/27/2025 3:36 PM, Quentin Schulz wrote:
From: Quentin Schulz quentin.schulz@cherry.de
This reverts commit 8240e87f16d17a9592c9d67857a3dcdbcb98f10d.
The original commit claimed that APIO5 IO domain (supplied with audio-supply) is supplied by RK808-D Buck 4 as stated in the schematics.
The linked PDF has two non-schematics pages where APIO5 indeed is said to be 1.8V. Reading the actual schematics[1][2][3][4][5][6][7][8], this is actually wrong as APIO5 is supplied VCC_3V0 which is LDO8 from RK808-D and is 3.0V instead of 1.8V from vcca1v8_codec.
This fixes the console disappearing in U-Boot, where the Device Tree is imported from the Linux kernel repo, when the IO domain driver is built, as reported by Heinrich[9]. As to why this breaks the console while the serial is not exposed on any of the pins on the bank in the APIO5 domain, that is a well-kept secret by the SoC for now.
The issue "fixed" by the original commit will need to be fixed another way.
[1] https://dl.radxa.com/rockpi4/docs/hw/rockpi4/4ap/radxa_rock_4ap_v1600_schema... [2] https://dl.radxa.com/rockpi4/docs/hw/rockpi4/4ap/radxa_rock_4ap_v1730_schema... [3] https://dl.radxa.com/rockpi4/docs/hw/rockpi4/4bp/radxa_rock_4bp_v1600_schema... [4] https://dl.radxa.com/rockpi4/docs/hw/rockpi4/4bp/radxa_rock_4bp_v1730_schema... [5] https://dl.radxa.com/rockpi4/docs/hw/rockpi4/ROCK-4-SE-V1.53-SCH.pdf [6] https://dl.radxa.com/rockpi4/docs/hw/rockpi4/4b/ROCK_4B_v1.52_SCH.pdf [7] https://dl.radxa.com/rockpi4/docs/hw/rockpi4/4a/ROCK_4A_V1.52_SCH.pdf [8] https://dl.radxa.com/rockpi4/docs/hw/rockpi4/rockpi4_v13_sch_20181112.pdf [9] https://lore.kernel.org/u-boot/e7b7b905-4a6c-4342-b1a5-0ad32a5837cf@gmx.de/
Cc: stable@vger.kernel.org Reported-by: Heinrich Schuchardt xypron.glpk@gmx.de Signed-off-by: Quentin Schulz quentin.schulz@cherry.de
Note: I do not own any of the Rock Pi 4 variants so I cannot work on fixing the original issue report by Alex.
arch/arm64/boot/dts/rockchip/rk3399-rock-pi-4.dtsi | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/arm64/boot/dts/rockchip/rk3399-rock-pi-4.dtsi b/arch/arm64/boot/dts/rockchip/rk3399-rock-pi-4.dtsi index 046dbe3290178..fda7ea87e4efc 100644 --- a/arch/arm64/boot/dts/rockchip/rk3399-rock-pi-4.dtsi +++ b/arch/arm64/boot/dts/rockchip/rk3399-rock-pi-4.dtsi @@ -516,7 +516,7 @@ &i2s2 { }; &io_domains {
- audio-supply = <&vcca1v8_codec>;
- audio-supply = <&vcc_3v0>;
This revert/patch seem to be identical to the following patch from a month ago:
https://lore.kernel.org/all/20251027005220.22298-1-naoki@radxa.com/
Regards, Jonas
bt656-supply = <&vcc_3v0>; gpio1830-supply = <&vcc_3v0>; sdmmc-supply = <&vcc_sdio>;
base-commit: 765e56e41a5af2d456ddda6cbd617b9d3295ab4e change-id: 20251127-rock-pi-4-io-domain-apio5-26bc2afa8224
Best regards,