[PATCH 0/4] Tegra CEC Updates

[PATCH 0/4] Tegra CEC Updates

[Aaron Kling via B4 Relay]

This series updates Tegra hdmi cec support to be usable out of the box
on Tegra210 through Tegra194.

Signed-off-by: Aaron Kling <webgeek1234@gmail.com>
---
Aaron Kling (4):
      media: dt-bindings: Document Tegra186 and Tegra194 cec
      media: tegra-cec: Support Tegra186 and Tegra194
      arm64: tegra: Add CEC controller on Tegra210
      arm64: tegra: Wire up cec to devkits

 .../devicetree/bindings/media/cec/nvidia,tegra114-cec.yaml       | 2 ++
 arch/arm64/boot/dts/nvidia/tegra186-p2771-0000.dts               | 6 ++++++
 arch/arm64/boot/dts/nvidia/tegra186-p3509-0000+p3636-0001.dts    | 6 ++++++
 arch/arm64/boot/dts/nvidia/tegra194-p2972-0000.dts               | 6 ++++++
 arch/arm64/boot/dts/nvidia/tegra194-p3509-0000.dtsi              | 6 ++++++
 arch/arm64/boot/dts/nvidia/tegra210-p2371-2180.dts               | 6 ++++++
 arch/arm64/boot/dts/nvidia/tegra210-p3450-0000.dts               | 6 ++++++
 arch/arm64/boot/dts/nvidia/tegra210.dtsi                         | 9 +++++++++
 drivers/media/cec/platform/tegra/tegra_cec.c                     | 2 ++
 9 files changed, 49 insertions(+)
---
base-commit: 0af2f6be1b4281385b618cb86ad946eded089ac8
change-id: 20250407-tegra-cec-7e3a7bef456f

Best regards,
-- 
Aaron Kling <webgeek1234@gmail.com>

[PATCH 1/4] media: dt-bindings: Document Tegra186 and Tegra194 cec

[Aaron Kling via B4 Relay]

From: Aaron Kling <webgeek1234@gmail.com>

These are already used in device trees, so describe them here.

Signed-off-by: Aaron Kling <webgeek1234@gmail.com>
---
 Documentation/devicetree/bindings/media/cec/nvidia,tegra114-cec.yaml | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/Documentation/devicetree/bindings/media/cec/nvidia,tegra114-cec.yaml b/Documentation/devicetree/bindings/media/cec/nvidia,tegra114-cec.yaml
index a6b73498bc217a2e884e31af91e9d8845c9b1d76..27987bc428ea1a0db8dba4910727e1ce3fa3dab3 100644
--- a/Documentation/devicetree/bindings/media/cec/nvidia,tegra114-cec.yaml
+++ b/Documentation/devicetree/bindings/media/cec/nvidia,tegra114-cec.yaml
@@ -18,6 +18,8 @@ properties:
       - nvidia,tegra114-cec
       - nvidia,tegra124-cec
       - nvidia,tegra210-cec
+      - nvidia,tegra186-cec
+      - nvidia,tegra194-cec
 
   clocks:
     maxItems: 1

-- 
2.48.1

[PATCH 2/4] media: tegra-cec: Support Tegra186 and Tegra194

[Aaron Kling via B4 Relay]

From: Aaron Kling <webgeek1234@gmail.com>

The tegra186 and tegra194 controllers are working with the driver as-is,
so add the compatibles to allow them to probe.

Signed-off-by: Aaron Kling <webgeek1234@gmail.com>
---
 drivers/media/cec/platform/tegra/tegra_cec.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/media/cec/platform/tegra/tegra_cec.c b/drivers/media/cec/platform/tegra/tegra_cec.c
index 3ed50097262f64c32fe0480698cea9a1056a0953..aa3d36286d256d59f9d726e5c3cee5decacd1d23 100644
--- a/drivers/media/cec/platform/tegra/tegra_cec.c
+++ b/drivers/media/cec/platform/tegra/tegra_cec.c
@@ -456,6 +456,8 @@ static const struct of_device_id tegra_cec_of_match[] = {
 	{ .compatible = "nvidia,tegra114-cec", },
 	{ .compatible = "nvidia,tegra124-cec", },
 	{ .compatible = "nvidia,tegra210-cec", },
+	{ .compatible = "nvidia,tegra186-cec", },
+	{ .compatible = "nvidia,tegra194-cec", },
 	{},
 };
 

-- 
2.48.1

[PATCH 3/4] arm64: tegra: Add CEC controller on Tegra210

[Aaron Kling via B4 Relay]

From: Aaron Kling <webgeek1234@gmail.com>

The CEC controller found on Tegra210 can be used to control consumer
devices using the HDMI CEC pin.

Signed-off-by: Aaron Kling <webgeek1234@gmail.com>
---
 arch/arm64/boot/dts/nvidia/tegra210.dtsi | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/arch/arm64/boot/dts/nvidia/tegra210.dtsi b/arch/arm64/boot/dts/nvidia/tegra210.dtsi
index b6c84d195c0ef9ae90721fada09ffd46a9c11fa3..402b0ede1472af625d9d9e811f5af306d436cc98 100644
--- a/arch/arm64/boot/dts/nvidia/tegra210.dtsi
+++ b/arch/arm64/boot/dts/nvidia/tegra210.dtsi
@@ -959,6 +959,15 @@ fuse@7000f800 {
 		reset-names = "fuse";
 	};
 
+	cec@70015000 {
+		compatible = "nvidia,tegra210-cec";
+		reg = <0x0 0x070015000 0x0 0x1000>;
+		interrupts = <GIC_SPI 3 IRQ_TYPE_LEVEL_HIGH>;
+		clocks = <&tegra_car TEGRA210_CLK_CEC>;
+		clock-names = "cec";
+		status = "disabled";
+	};
+
 	mc: memory-controller@70019000 {
 		compatible = "nvidia,tegra210-mc";
 		reg = <0x0 0x70019000 0x0 0x1000>;

-- 
2.48.1

[PATCH 4/4] arm64: tegra: Wire up cec to devkits

[Aaron Kling via B4 Relay]

From: Aaron Kling <webgeek1234@gmail.com>

This enables hdmi cec and routes it to the hdmi port on all supported
Tegra210, Tegra186, and Tegra194 devkits.

Signed-off-by: Aaron Kling <webgeek1234@gmail.com>
---
 arch/arm64/boot/dts/nvidia/tegra186-p2771-0000.dts            | 6 ++++++
 arch/arm64/boot/dts/nvidia/tegra186-p3509-0000+p3636-0001.dts | 6 ++++++
 arch/arm64/boot/dts/nvidia/tegra194-p2972-0000.dts            | 6 ++++++
 arch/arm64/boot/dts/nvidia/tegra194-p3509-0000.dtsi           | 6 ++++++
 arch/arm64/boot/dts/nvidia/tegra210-p2371-2180.dts            | 6 ++++++
 arch/arm64/boot/dts/nvidia/tegra210-p3450-0000.dts            | 6 ++++++
 6 files changed, 36 insertions(+)

diff --git a/arch/arm64/boot/dts/nvidia/tegra186-p2771-0000.dts b/arch/arm64/boot/dts/nvidia/tegra186-p2771-0000.dts
index 15aa49fc450399c7bd525adcdb6e92a27a185805..90155e4ff1feb609f79416a410c3666ebef8b634 100644
--- a/arch/arm64/boot/dts/nvidia/tegra186-p2771-0000.dts
+++ b/arch/arm64/boot/dts/nvidia/tegra186-p2771-0000.dts
@@ -2394,6 +2394,12 @@ usb@3550000 {
 		phy-names = "usb2-0";
 	};
 
+	cec@3960000 {
+		status = "okay";
+
+		hdmi-phandle = <&sor1>;
+	};
+
 	i2c@c250000 {
 		/* carrier board ID EEPROM */
 		eeprom@57 {
diff --git a/arch/arm64/boot/dts/nvidia/tegra186-p3509-0000+p3636-0001.dts b/arch/arm64/boot/dts/nvidia/tegra186-p3509-0000+p3636-0001.dts
index 26f71651933d1d8ef32bbd1645cac1820bd2e104..a6d7fec2e84fb917018aff843845b02c34fede33 100644
--- a/arch/arm64/boot/dts/nvidia/tegra186-p3509-0000+p3636-0001.dts
+++ b/arch/arm64/boot/dts/nvidia/tegra186-p3509-0000+p3636-0001.dts
@@ -712,6 +712,12 @@ usb@3550000 {
 		phy-names = "usb2-0";
 	};
 
+	cec@3960000 {
+		status = "okay";
+
+		hdmi-phandle = <&sor1>;
+	};
+
 	hsp@3c00000 {
 		status = "okay";
 	};
diff --git a/arch/arm64/boot/dts/nvidia/tegra194-p2972-0000.dts b/arch/arm64/boot/dts/nvidia/tegra194-p2972-0000.dts
index c32876699a43e9f57b3888c5bc0f5da73c5b95b5..ea6f397a27926e3dcd54002177f68749bc1cc309 100644
--- a/arch/arm64/boot/dts/nvidia/tegra194-p2972-0000.dts
+++ b/arch/arm64/boot/dts/nvidia/tegra194-p2972-0000.dts
@@ -2121,6 +2121,12 @@ usb@3610000 {
 			phy-names = "usb2-0", "usb2-1", "usb2-3", "usb3-0", "usb3-2", "usb3-3";
 		};
 
+		cec@3960000 {
+			status = "okay";
+
+			hdmi-phandle = <&sor2>;
+		};
+
 		i2c@c240000 {
 			typec@8 {
 				compatible = "cypress,cypd4226";
diff --git a/arch/arm64/boot/dts/nvidia/tegra194-p3509-0000.dtsi b/arch/arm64/boot/dts/nvidia/tegra194-p3509-0000.dtsi
index 4a17ea5e40fd034c6f4acb023cd7908d6800f710..16cf4414de599baea96362b494be40c800a8197f 100644
--- a/arch/arm64/boot/dts/nvidia/tegra194-p3509-0000.dtsi
+++ b/arch/arm64/boot/dts/nvidia/tegra194-p3509-0000.dtsi
@@ -2174,6 +2174,12 @@ usb@3610000 {
 			phy-names = "usb2-1", "usb2-2", "usb3-2";
 		};
 
+		cec@3960000 {
+			status = "okay";
+
+			hdmi-phandle = <&sor1>;
+		};
+
 		host1x@13e00000 {
 			display-hub@15200000 {
 				status = "okay";
diff --git a/arch/arm64/boot/dts/nvidia/tegra210-p2371-2180.dts b/arch/arm64/boot/dts/nvidia/tegra210-p2371-2180.dts
index a6a58e51822d90f8815df880ea7e668caff1b1ec..627abf51a5a472ddcc42fdc1d783876b0a03da47 100644
--- a/arch/arm64/boot/dts/nvidia/tegra210-p2371-2180.dts
+++ b/arch/arm64/boot/dts/nvidia/tegra210-p2371-2180.dts
@@ -90,6 +90,12 @@ eeprom@57 {
 		};
 	};
 
+	cec@70015000 {
+		status = "okay";
+
+		hdmi-phandle = <&sor1>;
+	};
+
 	clock@70110000 {
 		status = "okay";
 
diff --git a/arch/arm64/boot/dts/nvidia/tegra210-p3450-0000.dts b/arch/arm64/boot/dts/nvidia/tegra210-p3450-0000.dts
index 0ecdd7243b2eb1abba9adbe9a404b226c29b85ef..ec0e84cb83ef9bf8f0e52e2958db33666813917c 100644
--- a/arch/arm64/boot/dts/nvidia/tegra210-p3450-0000.dts
+++ b/arch/arm64/boot/dts/nvidia/tegra210-p3450-0000.dts
@@ -419,6 +419,12 @@ pmc@7000e400 {
 		nvidia,sys-clock-req-active-high;
 	};
 
+	cec@70015000 {
+		status = "okay";
+
+		hdmi-phandle = <&sor1>;
+	};
+
 	hda@70030000 {
 		nvidia,model = "NVIDIA Jetson Nano HDA";
 

-- 
2.48.1

Re: [PATCH 1/4] media: dt-bindings: Document Tegra186 and Tegra194 cec

[Krzysztof Kozlowski]

On 08/04/2025 06:39, Aaron Kling via B4 Relay wrote:
> From: Aaron Kling <webgeek1234@gmail.com>
> 
> These are already used in device trees, so describe them here.
> 
> Signed-off-by: Aaron Kling <webgeek1234@gmail.com>
> ---
>  Documentation/devicetree/bindings/media/cec/nvidia,tegra114-cec.yaml | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/media/cec/nvidia,tegra114-cec.yaml b/Documentation/devicetree/bindings/media/cec/nvidia,tegra114-cec.yaml
> index a6b73498bc217a2e884e31af91e9d8845c9b1d76..27987bc428ea1a0db8dba4910727e1ce3fa3dab3 100644
> --- a/Documentation/devicetree/bindings/media/cec/nvidia,tegra114-cec.yaml
> +++ b/Documentation/devicetree/bindings/media/cec/nvidia,tegra114-cec.yaml
> @@ -18,6 +18,8 @@ properties:
>        - nvidia,tegra114-cec
>        - nvidia,tegra124-cec
>        - nvidia,tegra210-cec
> +      - nvidia,tegra186-cec
> +      - nvidia,tegra194-cec
Don't add to the end of lists, but keep entries sorted.

Best regards,
Krzysztof

Re: [PATCH 2/4] media: tegra-cec: Support Tegra186 and Tegra194

[Krzysztof Kozlowski]

On 08/04/2025 06:39, Aaron Kling via B4 Relay wrote:
> From: Aaron Kling <webgeek1234@gmail.com>
> 
> The tegra186 and tegra194 controllers are working with the driver as-is,
> so add the compatibles to allow them to probe.
> 
> Signed-off-by: Aaron Kling <webgeek1234@gmail.com>
> ---
>  drivers/media/cec/platform/tegra/tegra_cec.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/drivers/media/cec/platform/tegra/tegra_cec.c b/drivers/media/cec/platform/tegra/tegra_cec.c
> index 3ed50097262f64c32fe0480698cea9a1056a0953..aa3d36286d256d59f9d726e5c3cee5decacd1d23 100644
> --- a/drivers/media/cec/platform/tegra/tegra_cec.c
> +++ b/drivers/media/cec/platform/tegra/tegra_cec.c
> @@ -456,6 +456,8 @@ static const struct of_device_id tegra_cec_of_match[] = {
>  	{ .compatible = "nvidia,tegra114-cec", },
>  	{ .compatible = "nvidia,tegra124-cec", },
>  	{ .compatible = "nvidia,tegra210-cec", },
> +	{ .compatible = "nvidia,tegra186-cec", },
> +	{ .compatible = "nvidia,tegra194-cec", },

No, express compatible devices with fallbacks.


Best regards,
Krzysztof