The Radxa Rock 5 ITX board exposes an HDMI input exactly the same way as
the Rock 5B, but this was not reflected in its DTS.

Change the rk3588-rock-5-itx to configure and enable the hdmi_receiver
and hdmi_receiver_cma nodes.

One of the existing pinctrl labels, hdmirx_det, was renamed into
hdmirx_hpd to match the other boards. The _det name seems to have come
from the downstream kernel sources, where the other boards also have
that name. Changing it to hdmirx_hpd in order to be consistent with the
other rk3588 boards in the kernel.

The configurations were confirmed to be identical on the downstream
Radxa kernel, and this has been tested to work on a Rock 5 ITX board
running kernel 6.19.3.

Signed-off-by: Pedro Alves <pta2002@pta2002.com>
---
Tested with the following commands:

v4l2-ctl --verbose -d /dev/video4 \
  --set-fmt-video=width=3840,height=2160,pixelformat='BGR3' \
  --stream-mmap=4 --stream-skip=3 --stream-count=20 \
  --stream-to=hdmiin.raw --stream-poll

ffmpeg -f rawvideo -vcodec rawvideo -s 3840x2160 -r 30 -pix_fmt bgr24 \
  -i hdmiin.raw output.mp4
---
 arch/arm64/boot/dts/rockchip/rk3588-rock-5-itx.dts | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/boot/dts/rockchip/rk3588-rock-5-itx.dts b/arch/arm64/boot/dts/rockchip/rk3588-rock-5-itx.dts
index 172aeabba72a..9f4f31d1ca94 100644
--- a/arch/arm64/boot/dts/rockchip/rk3588-rock-5-itx.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3588-rock-5-itx.dts
@@ -349,6 +349,18 @@ &hdmi1_sound {
 	status = "okay";
 };
 
+&hdmi_receiver_cma {
+	status = "okay";
+};
+
+&hdmi_receiver {
+	pinctrl-0 = <&hdmim1_rx_cec &hdmim1_rx_hpdin &hdmim1_rx_scl &hdmim1_rx_sda &hdmirx_hpd>;
+	pinctrl-names = "default";
+
+	hpd-gpios = <&gpio1 RK_PC6 GPIO_ACTIVE_LOW>;
+	status = "okay";
+};
+
 &hdptxphy1 {
 	status = "okay";
 };
@@ -746,7 +758,7 @@ vbus5v0_typec_en: vbus5v0-typec-en {
 	};
 
 	hdmirx {
-		hdmirx_det: hdmirx-det {
+		hdmirx_hpd: hdmirx-5v-detection {
 			rockchip,pins = <1 RK_PC6 RK_FUNC_GPIO &pcfg_pull_none>;
 		};
 	};

---
base-commit: 05f7e89ab9731565d8a62e3b5d1ec206485eeb0b
change-id: 20260303-radxa-r5-itx-hdmirx-f4645e64f8c3

Best regards,
-- 
Pedro Alves <pta2002@pta2002.com>

On Wed Mar 4, 2026 at 2:54 PM CET, Pedro Alves wrote:
> The Radxa Rock 5 ITX board exposes an HDMI input exactly the same way as
> the Rock 5B, but this was not reflected in its DTS.
>
> Change the rk3588-rock-5-itx to configure and enable the hdmi_receiver
> and hdmi_receiver_cma nodes.
>
> One of the existing pinctrl labels, hdmirx_det, was renamed into
> hdmirx_hpd to match the other boards. The _det name seems to have come
> from the downstream kernel sources, where the other boards also have
> that name. Changing it to hdmirx_hpd in order to be consistent with the
> other rk3588 boards in the kernel.

I have a strong suspicion that it was named 'hdmirx_det' because in the
schema its label is 'HDMIIRX_DET_L' where the extra 'I' was probably
dropped as that seems to be a spelling issue and the '_L' suffix is
quite often dropped.

FWIW: The label in the schematic for Rock 5B, Rock 5B+, Rock 5T and Rock
5 ITX+ are all 'HDMIIRX_DET_L', yet none of them follow the convention
to use the label from the schematics.

So now the 'problem' is indeed: make it consistent with the other boards
or keep the one where the convention was followed.

Cheers,
  Diederik

> The configurations were confirmed to be identical on the downstream
> Radxa kernel, and this has been tested to work on a Rock 5 ITX board
> running kernel 6.19.3.
>
> Signed-off-by: Pedro Alves <pta2002@pta2002.com>
> ---
> Tested with the following commands:
>
> v4l2-ctl --verbose -d /dev/video4 \
>   --set-fmt-video=width=3840,height=2160,pixelformat='BGR3' \
>   --stream-mmap=4 --stream-skip=3 --stream-count=20 \
>   --stream-to=hdmiin.raw --stream-poll
>
> ffmpeg -f rawvideo -vcodec rawvideo -s 3840x2160 -r 30 -pix_fmt bgr24 \
>   -i hdmiin.raw output.mp4
> ---
>  arch/arm64/boot/dts/rockchip/rk3588-rock-5-itx.dts | 14 +++++++++++++-
>  1 file changed, 13 insertions(+), 1 deletion(-)
>
> diff --git a/arch/arm64/boot/dts/rockchip/rk3588-rock-5-itx.dts b/arch/arm64/boot/dts/rockchip/rk3588-rock-5-itx.dts
> index 172aeabba72a..9f4f31d1ca94 100644
> --- a/arch/arm64/boot/dts/rockchip/rk3588-rock-5-itx.dts
> +++ b/arch/arm64/boot/dts/rockchip/rk3588-rock-5-itx.dts
> @@ -349,6 +349,18 @@ &hdmi1_sound {
>  	status = "okay";
>  };
>  
> +&hdmi_receiver_cma {
> +	status = "okay";
> +};
> +
> +&hdmi_receiver {
> +	pinctrl-0 = <&hdmim1_rx_cec &hdmim1_rx_hpdin &hdmim1_rx_scl &hdmim1_rx_sda &hdmirx_hpd>;
> +	pinctrl-names = "default";
> +
> +	hpd-gpios = <&gpio1 RK_PC6 GPIO_ACTIVE_LOW>;
> +	status = "okay";
> +};
> +
>  &hdptxphy1 {
>  	status = "okay";
>  };
> @@ -746,7 +758,7 @@ vbus5v0_typec_en: vbus5v0-typec-en {
>  	};
>  
>  	hdmirx {
> -		hdmirx_det: hdmirx-det {
> +		hdmirx_hpd: hdmirx-5v-detection {
>  			rockchip,pins = <1 RK_PC6 RK_FUNC_GPIO &pcfg_pull_none>;
>  		};
>  	};
>
> ---
> base-commit: 05f7e89ab9731565d8a62e3b5d1ec206485eeb0b
> change-id: 20260303-radxa-r5-itx-hdmirx-f4645e64f8c3
>
> Best regards,

On 04/03/2026 18:38, Diederik de Haas wrote:
> I have a strong suspicion that it was named 'hdmirx_det' because in the
> schema its label is 'HDMIIRX_DET_L' where the extra 'I' was probably
> dropped as that seems to be a spelling issue and the '_L' suffix is
> quite often dropped.
>
> FWIW: The label in the schematic for Rock 5B, Rock 5B+, Rock 5T and Rock
> 5 ITX+ are all 'HDMIIRX_DET_L', yet none of them follow the convention
> to use the label from the schematics.

That's a good point, and the other boards all have the hdmirx_det
naming in the downstream kernel, so I guess that would be the most
"correct" name to use.

> So now the 'problem' is indeed: make it consistent with the other boards
> or keep the one where the convention was followed.

Also a third option of changing the other boards to all match. Either
way, I can do those changes, just let me know what would be desirable.

Best regards,
Pedro Alves