Re: [PATCH v2] arm64: dts: ti: k3-am62l: Add HDMI & DSI support

From: Nishanth Menon

Date: Fri May 29 2026 - 10:20:53 EST

On 19:05-20260528, Swamil Jain wrote:
> From: Devarsh Thakkar <devarsht@xxxxxx>
>
> Add DSS, DSI, DPHY, and HDMI bridge nodes to enable DPI-to-HDMI output
> on AM62L[1]. The DSS uses parallel DPI interface with pinctrl
> configuration to drive an external SiI9022 HDMI bridge.
>
> DSI and DPHY nodes are added but remain disabled, as the AM62L shares a
> single video port for DPI and DSI output.
>
> DSI functionality can be enabled via overlays when required.
>
> [1]: https://www.ti.com/product/AM62L

1. please split this up. please dont mix the SoC with evm stuff.
2. I suggest DPI output be a overlay as well

>
> Signed-off-by: Devarsh Thakkar <devarsht@xxxxxx>
> Signed-off-by: Swamil Jain <s-jain1@xxxxxx>
> ---
> Changelog:
> v1->v2:
> - Update the commit message to elaborate more about the patch.
> - Add dpi-pinctrl configuration.
> - Update the interrupt routing index for HDMI interrupt line
>
> Link to v1: https://lore.kernel.org/all/20260513210942.692269-1-s-jain1@xxxxxx/
> ---
> arch/arm64/boot/dts/ti/k3-am62l-main.dtsi | 47 +++++++++++
> arch/arm64/boot/dts/ti/k3-am62l3-evm.dts | 95 +++++++++++++++++++++++
> 2 files changed, 142 insertions(+)
>
> diff --git a/arch/arm64/boot/dts/ti/k3-am62l-main.dtsi b/arch/arm64/boot/dts/ti/k3-am62l-main.dtsi
> index 80615ca1e01a..1d255c9138db 100644
> --- a/arch/arm64/boot/dts/ti/k3-am62l-main.dtsi
> +++ b/arch/arm64/boot/dts/ti/k3-am62l-main.dtsi
> @@ -584,4 +584,51 @@ scmi_shmem: sram@0 {
> bootph-all;
> };
> };
> +
> + dss: dss@30200000 {
> + compatible = "ti,am62l-dss";
> + reg = <0x00 0x30200000 0x00 0x1000>, /* common */
> + <0x00 0x30202000 0x00 0x1000>, /* vidl1 */
> + <0x00 0x30207000 0x00 0x1000>, /* ovr1 */
> + <0x00 0x3020a000 0x00 0x1000>, /* vp1 */
> + <0x00 0x30201000 0x00 0x1000>; /* common1 */
> + reg-names = "common", "vidl1", "ovr1", "vp1", "common1";
> + power-domains = <&scmi_pds 39>;
> + clocks = <&scmi_clk 162>,
> + <&scmi_clk 161>;
> + clock-names = "fck", "vp1";
> + interrupts = <GIC_SPI 60 IRQ_TYPE_LEVEL_HIGH>;
> + status = "disabled";
> +
> + dss_ports: ports {
> + #address-cells = <1>;
> + #size-cells = <0>;
> + };
> + };
> +
> + dphy_tx0: phy@301c0000 {
> + compatible = "ti,j721e-dphy";
> + reg = <0x0 0x301c0000 0x0 0x1000>;
> + clocks = <&scmi_clk 348>, <&scmi_clk 343>;
> + clock-names = "psm", "pll_ref";
> + #phy-cells = <0>;
> + power-domains = <&scmi_pds 86>;
> + assigned-clocks = <&scmi_clk 343>;
> + assigned-clock-parents = <&scmi_clk 341>;
> + assigned-clock-rates = <25000000>;
> + status = "disabled";
> + };
> +
> + dsi0: dsi@30500000 {
> + compatible = "ti,j721e-dsi";
> + reg = <0x0 0x30500000 0x0 0x100000>, <0x0 0x30270000 0x0 0x100>;
> + clocks = <&scmi_clk 155>, <&scmi_clk 158>;
> + clock-names = "dsi_p_clk", "dsi_sys_clk";
> + power-domains = <&scmi_pds 38>;
> + interrupt-parent = <&gic500>;
> + interrupts = <GIC_SPI 57 IRQ_TYPE_LEVEL_HIGH>;
> + phys = <&dphy_tx0>;
> + phy-names = "dphy";
> + status = "disabled";
> + };
> };
> diff --git a/arch/arm64/boot/dts/ti/k3-am62l3-evm.dts b/arch/arm64/boot/dts/ti/k3-am62l3-evm.dts
> index a1af4571a815..9b04fa6d2cba 100644
> --- a/arch/arm64/boot/dts/ti/k3-am62l3-evm.dts
> +++ b/arch/arm64/boot/dts/ti/k3-am62l3-evm.dts
> @@ -119,6 +119,18 @@ vcc_1v8: regulator-3 {
> regulator-always-on;
> regulator-boot-on;
> };
> +
> + hdmi0: connector-hdmi {
> + compatible = "hdmi-connector";
> + label = "hdmi";
> + type = "a";
> +
> + port {
> + hdmi_connector_in: endpoint {
> + remote-endpoint = <&sii9022_out>;
> + };
> + };
> + };
> };
>
> &gpio0 {
> @@ -192,6 +204,38 @@ exp2: gpio@23 {
> bootph-all;
> };
>
> + sii9022: bridge-hdmi@3b {
> + compatible = "sil,sii9022";
> + reg = <0x3b>;
> + interrupt-parent = <&exp1>;
> + interrupts = <20 IRQ_TYPE_EDGE_FALLING>;

I see you addressed sashiko comments
https://lore.kernel.org/all/20260514112012.0B0D0C2BCB3@xxxxxxxxxxxxxxx/

but i dont see evidence of HPD working. logs please for the next rev.

> + #sound-dai-cells = <0>;
> + sil,i2s-data-lanes = < 0 >;
> + pinctrl-names = "default";
> + pinctrl-0 = <&dpi_pins_default>;
> + bootph-all;
> +
> + ports {
> + #address-cells = <1>;
> + #size-cells = <0>;
> +
> + port@0 {
> + reg = <0>;
> +
> + sii9022_in: endpoint {
> + remote-endpoint = <&dpi_out>;
> + };
> + };
> +
> + port@1 {
> + reg = <1>;
> +
> + sii9022_out: endpoint {
> + remote-endpoint = <&hdmi_connector_in>;
> + };
> + };
> + };
> + };
> };
>
> &i2c2 {
> @@ -221,6 +265,41 @@ usb_con_hs: endpoint {
> };
>
> &pmx0 {
> + dpi_pins_default: dpi-default-pins {
> + pinctrl-single,pins = <
> + AM62LX_IOPAD(0x00e4, PIN_OUTPUT, 1) /* (L20) GPMC0_CSn0.VOUT0_VSYNC */
> + AM62LX_IOPAD(0x00dc, PIN_OUTPUT, 1) /* (N21) GPMC0_WPn.VOUT0_HSYNC */
> + AM62LX_IOPAD(0x00e8, PIN_OUTPUT, 1) /* (L19) GPMC0_CSn1.VOUT0_PCLK */
> + AM62LX_IOPAD(0x00e0, PIN_OUTPUT, 1) /* (M21) GPMC0_DIR.VOUT0_DE */
> + AM62LX_IOPAD(0x0078, PIN_OUTPUT, 1) /* (L22) GPMC0_AD0.VOUT0_DATA0 */
> + AM62LX_IOPAD(0x007c, PIN_OUTPUT, 1) /* (L23) GPMC0_AD1.VOUT0_DATA1 */
> + AM62LX_IOPAD(0x0080, PIN_OUTPUT, 1) /* (K22) GPMC0_AD2.VOUT0_DATA2 */
> + AM62LX_IOPAD(0x0084, PIN_OUTPUT, 1) /* (J23) GPMC0_AD3.VOUT0_DATA3 */
> + AM62LX_IOPAD(0x0088, PIN_OUTPUT, 1) /* (K23) GPMC0_AD4.VOUT0_DATA4 */
> + AM62LX_IOPAD(0x008c, PIN_OUTPUT, 1) /* (H22) GPMC0_AD5.VOUT0_DATA5 */
> + AM62LX_IOPAD(0x0090, PIN_OUTPUT, 1) /* (H23) GPMC0_AD6.VOUT0_DATA6 */
> + AM62LX_IOPAD(0x0094, PIN_OUTPUT, 1) /* (J22) GPMC0_AD7.VOUT0_DATA7 */
> + AM62LX_IOPAD(0x0098, PIN_OUTPUT, 1) /* (H19) GPMC0_AD8.VOUT0_DATA8 */
> + AM62LX_IOPAD(0x009c, PIN_OUTPUT, 1) /* (H20) GPMC0_AD9.VOUT0_DATA9 */
> + AM62LX_IOPAD(0x00a0, PIN_OUTPUT, 1) /* (H21) GPMC0_AD10.VOUT0_DATA10 */
> + AM62LX_IOPAD(0x00a4, PIN_OUTPUT, 1) /* (H18) GPMC0_AD11.VOUT0_DATA11 */
> + AM62LX_IOPAD(0x00a8, PIN_OUTPUT, 1) /* (G23) GPMC0_AD12.VOUT0_DATA12 */
> + AM62LX_IOPAD(0x00ac, PIN_OUTPUT, 1) /* (G22) GPMC0_AD13.VOUT0_DATA13 */
> + AM62LX_IOPAD(0x00b0, PIN_OUTPUT, 1) /* (F22) GPMC0_AD14.VOUT0_DATA14 */
> + AM62LX_IOPAD(0x00b4, PIN_OUTPUT, 1) /* (F23) GPMC0_AD15.VOUT0_DATA15 */
> + AM62LX_IOPAD(0x00b8, PIN_OUTPUT, 1) /* (L21) GPMC0_CLK.VOUT0_DATA16 */
> + AM62LX_IOPAD(0x00c0, PIN_OUTPUT, 1) /* (N19) GPMC0_ADVn_ALE.VOUT0_DATA17 */
> + AM62LX_IOPAD(0x00c4, PIN_OUTPUT, 1) /* (N20) GPMC0_OEn_REn.VOUT0_DATA18 */
> + AM62LX_IOPAD(0x00c8, PIN_OUTPUT, 1) /* (M19) GPMC0_WEn.VOUT0_DATA19 */
> + AM62LX_IOPAD(0x00cc, PIN_OUTPUT, 1) /* (P23) GPMC0_BE0n_CLE.VOUT0_DATA20 */
> + AM62LX_IOPAD(0x00d0, PIN_OUTPUT, 1) /* (P22) GPMC0_BE1n.VOUT0_DATA21 */
> + AM62LX_IOPAD(0x00d4, PIN_OUTPUT, 1) /* (N23) GPMC0_WAIT0.VOUT0_DATA22 */
> + AM62LX_IOPAD(0x00d8, PIN_OUTPUT, 1) /* (N22) GPMC0_WAIT1.VOUT0_DATA23 */
> + AM62LX_IOPAD(0x00ec, PIN_OUTPUT, 5) /* (M23) GPMC0_CSn2.VOUT0_EXTPCLKIN */
> + >;
> + bootph-all;
> + };
> +
> gpio0_ioexp_intr_pins_default: gpio0-ioexp-intr-default-pins {
> pinctrl-single,pins = <
> AM62LX_IOPAD(0x01b0, PIN_INPUT, 7) /* (B12) SPI0_D1.GPIO0_91 */
> @@ -375,6 +454,22 @@ &usb1 {
> pinctrl-0 = <&usb1_default_pins>;
> };
>
> +&dss {
> + status = "okay";
> + bootph-all;
> +};
> +
> +&dss_ports {
> + /* VP1: DPI Output */
> + port@0 {
> + reg = <0>;
> +
> + dpi_out: endpoint {
> + remote-endpoint = <&sii9022_in>;
> + };
> + };
> +};
> +

Did we miss routing audio? I think it has an option of going to M2.key

> &wkup_uart0 {
> pinctrl-0 = <&wkup_uart0_pins_default>;
> pinctrl-names = "default";
>

--
Regards,
Nishanth Menon
Key (0xDDB5849D1736249D) / Fingerprint: F8A2 8693 54EB 8232 17A3 1A34 DDB5 849D 1736 249D
https://ti.com/opensource