[PATCH RESEND v2] arm64: dts: rockchip: configure hdmirx in Rock 5 ITX

[PATCH RESEND v2] arm64: dts: rockchip: configure hdmirx in Rock 5 ITX

[Pedro Alves]

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.

The hot-plug detection (HPD) pin keeps the hdmirx_det name rather than
the hdmirx_hpd name used in other boards since that is what matches the
official schematics (HDMIIRX_DET_L).

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
---
Changes in v2:
- Updated dts spacing to match coding style
- Reverted pin naming to hdmirx_det to match schematics
  - Didn't end up changing other boards to match. There are quite a few
    others, so I'll probably send a separate patch for that.

- Link to v1: https://lore.kernel.org/r/20260304-radxa-r5-itx-hdmirx-v1-1-f77bf1f7ce03@pta2002.com
---
 arch/arm64/boot/dts/rockchip/rk3588-rock-5-itx.dts | 12 ++++++++++++
 1 file changed, 12 insertions(+)

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..8e0eead7d223 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_det>;
+	pinctrl-names = "default";
+	hpd-gpios = <&gpio1 RK_PC6 GPIO_ACTIVE_LOW>;
+
+	status = "okay";
+};
+
 &hdptxphy1 {
 	status = "okay";
 };

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

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

Re: [PATCH RESEND v2] arm64: dts: rockchip: configure hdmirx in Rock 5 ITX

[Heiko Stuebner]

Am Montag, 23. März 2026, 10:25:33 Mitteleuropäische Normalzeit schrieb Pedro Alves:
> 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.
> 
> The hot-plug detection (HPD) pin keeps the hdmirx_det name rather than
> the hdmirx_hpd name used in other boards since that is what matches the
> official schematics (HDMIIRX_DET_L).
> 
> 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
> ---
> Changes in v2:
> - Updated dts spacing to match coding style
> - Reverted pin naming to hdmirx_det to match schematics
>   - Didn't end up changing other boards to match. There are quite a few
>     others, so I'll probably send a separate patch for that.
> 
> - Link to v1: https://lore.kernel.org/r/20260304-radxa-r5-itx-hdmirx-v1-1-f77bf1f7ce03@pta2002.com
> ---
>  arch/arm64/boot/dts/rockchip/rk3588-rock-5-itx.dts | 12 ++++++++++++
>  1 file changed, 12 insertions(+)
> 
> 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..8e0eead7d223 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_det>;
> +	pinctrl-names = "default";
> +	hpd-gpios = <&gpio1 RK_PC6 GPIO_ACTIVE_LOW>;

as said before, please also add a pinctrl setting for this pin.

gpio1_c6 is not part of the main hdmirx set of pins, hence needs an
additional pinctrl entry to configure it as gpio and possibly set any
additional pull settings.

And yes the pinctrl-driver does "implcitly" set the gpio-mode when
a gpio is requested, but our more modern approach is to always have
a real pinctrl entry even for gpios.


Heiko

Re: [PATCH RESEND v2] arm64: dts: rockchip: configure hdmirx in Rock 5 ITX

[Pedro Alves]

Hi,

On 24/03/2026 14:18, Heiko Stuebner wrote:
> Am Montag, 23. März 2026, 10:25:33 Mitteleuropäische Normalzeit schrieb Pedro Alves:
>> +&hdmi_receiver {
>> +	pinctrl-0 = <&hdmim1_rx_cec &hdmim1_rx_hpdin &hdmim1_rx_scl &hdmim1_rx_sda &hdmirx_det>;
>> +	pinctrl-names = "default";
>> +	hpd-gpios = <&gpio1 RK_PC6 GPIO_ACTIVE_LOW>;
> 
> as said before, please also add a pinctrl setting for this pin.
> 
> gpio1_c6 is not part of the main hdmirx set of pins, hence needs an
> additional pinctrl entry to configure it as gpio and possibly set any
> additional pull settings.
> 
> And yes the pinctrl-driver does "implcitly" set the gpio-mode when
> a gpio is requested, but our more modern approach is to always have
> a real pinctrl entry even for gpios.

I am probably getting confused by what you are asking here, but I don't
understand what exactly I should add. There was already a pinctrl for
hdmirx_det (which is what the gpio1_c6 pin is) present in the file,
hence why I did not add it in this patch:

&pinctrl {
	/* ... */
	hdmirx {
		hdmirx_det: hdmirx-det {
			rockchip,pins = <1 RK_PC6 RK_FUNC_GPIO &pcfg_pull_none>;
		};
	};
	/* ... */
};

Looking at the other boards, they do the same thing, but they call it
hdmirx-5v-detection instead, but as discussed in v1 of this patch I
ended up keeping the det naming to match the schematics.

Sorry if I am missing something, I don't have much experience with this,
so I would really appreciate some extra information.

Thank you,
Pedro

Re: [PATCH RESEND v2] arm64: dts: rockchip: configure hdmirx in Rock 5 ITX

[Heiko Stuebner]

Hi Pedro,

Am Mittwoch, 25. März 2026, 15:24:45 Mitteleuropäische Normalzeit schrieb Pedro Alves:
> Hi,
> 
> On 24/03/2026 14:18, Heiko Stuebner wrote:
> > Am Montag, 23. März 2026, 10:25:33 Mitteleuropäische Normalzeit schrieb Pedro Alves:
> >> +&hdmi_receiver {
> >> +	pinctrl-0 = <&hdmim1_rx_cec &hdmim1_rx_hpdin &hdmim1_rx_scl &hdmim1_rx_sda &hdmirx_det>;
> >> +	pinctrl-names = "default";
> >> +	hpd-gpios = <&gpio1 RK_PC6 GPIO_ACTIVE_LOW>;
> > 
> > as said before, please also add a pinctrl setting for this pin.
> > 
> > gpio1_c6 is not part of the main hdmirx set of pins, hence needs an
> > additional pinctrl entry to configure it as gpio and possibly set any
> > additional pull settings.
> > 
> > And yes the pinctrl-driver does "implcitly" set the gpio-mode when
> > a gpio is requested, but our more modern approach is to always have
> > a real pinctrl entry even for gpios.
> 
> I am probably getting confused by what you are asking here, but I don't
> understand what exactly I should add. There was already a pinctrl for
> hdmirx_det (which is what the gpio1_c6 pin is) present in the file,
> hence why I did not add it in this patch:
> 
> &pinctrl {
> 	/* ... */
> 	hdmirx {
> 		hdmirx_det: hdmirx-det {
> 			rockchip,pins = <1 RK_PC6 RK_FUNC_GPIO &pcfg_pull_none>;
> 		};
> 	};
> 	/* ... */
> };
> 
> Looking at the other boards, they do the same thing, but they call it
> hdmirx-5v-detection instead, but as discussed in v1 of this patch I
> ended up keeping the det naming to match the schematics.
> 
> Sorry if I am missing something, I don't have much experience with this,
> so I would really appreciate some extra information.

You didn't miss anything - I did :-) .

Not finding an addition to the pinctrl definitions in the patch
I misread the &hdmirx-det reference as the one defined in the core
rk3588-base-pinctrl, not realizing that the rock5-itx one was
already existing in the rock5-itx dts already.


Sorry about confusing you
Heiko

Re: [PATCH RESEND v2] arm64: dts: rockchip: configure hdmirx in Rock 5 ITX

[Heiko Stuebner]

On Mon, 23 Mar 2026 09:25:33 +0000, 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.
> 
> The hot-plug detection (HPD) pin keeps the hdmirx_det name rather than
> the hdmirx_hpd name used in other boards since that is what matches the
> official schematics (HDMIIRX_DET_L).
> 
> [...]

Applied, thanks!

[1/1] arm64: dts: rockchip: configure hdmirx in Rock 5 ITX
      commit: 6cb4ec63ba9a5831621cf951b7af55c67beeb97b

Best regards,
-- 
Heiko Stuebner <heiko@sntech.de>