[PATCH v2 0/3] Add support for Seeed Studio BeagleBone HDMI cape overlay

[PATCH v2 0/3] Add support for Seeed Studio BeagleBone HDMI cape overlay

[Kory Maincent (TI)]

Add devicetree overlay for the Seeed Studio BeagleBone HDMI cape, which
provides HDMI output via an ITE IT66121 HDMI bridge and audio support
through McASP.

https://www.seeedstudio.com/Seeed-Studio-BeagleBoner-Green-HDMI-Cape.html

This overlay requires the recent tilcdc cleanup patch series that was merged
to drm-misc-next to function properly:
https://lore.kernel.org/lkml/20260123-feature_tilcdc-v5-0-5a44d2aa3f6f@bootlin.com/

With this DRM tree dependency I don't know if this series should land in
DRM tree or in OMAP tree.

Signed-off-by: Kory Maincent (TI) <kory.maincent@bootlin.com>
---
Changes in v2:
- Enable overlays only for am335x BeagleBoard boards.
- Squash defconfig changes in one patch.
- Link to v1: https://lore.kernel.org/r/20260212-feature_bbge-v1-0-29014a212f35@bootlin.com

---
Kory Maincent (TI) (3):
      ARM: dts: ti: Enable overlays for am335x BeagleBoard devicetrees
      ARM: multi_v7_defconfig: omap2plus_defconfig: Enable ITE IT66121 driver
      ARM: dts: am335x: Add Seeed Studio BeagleBone HDMI cape overlay

 arch/arm/boot/dts/ti/omap/Makefile                 |  13 ++
 .../boot/dts/ti/omap/am335x-bone-hdmi-00a0.dtso    | 157 +++++++++++++++++++++
 arch/arm/configs/multi_v7_defconfig                |   2 +
 arch/arm/configs/omap2plus_defconfig               |   1 +
 4 files changed, 173 insertions(+)
---
base-commit: 40c1ccc1a3b86259e455a9a5082d5c8e0f944d62
change-id: 20260212-feature_bbge-932870b2edf5

Best regards,
-- 
Köry Maincent, Bootlin
Embedded Linux and kernel engineering
https://bootlin.com

[PATCH v2 1/3] ARM: dts: ti: Enable overlays for am335x BeagleBoard devicetrees

[Kory Maincent (TI)]

Allow overlays to be applied to am335x BeagleBoard boards. This adds
around ~40% to the total size of the DTB files on average.

Signed-off-by: Kory Maincent (TI) <kory.maincent@bootlin.com>
---

Changes in v2:
- Enable overlays only for am335x BeagleBoard boards.
---
 arch/arm/boot/dts/ti/omap/Makefile | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/arch/arm/boot/dts/ti/omap/Makefile b/arch/arm/boot/dts/ti/omap/Makefile
index 14e500846875e..dcc6d4422e411 100644
--- a/arch/arm/boot/dts/ti/omap/Makefile
+++ b/arch/arm/boot/dts/ti/omap/Makefile
@@ -175,3 +175,11 @@ dtb-$(CONFIG_SOC_TI81XX) += \
 	dm8148-t410.dtb \
 	dm8168-evm.dtb \
 	dra62x-j5eco-evm.dtb
+
+# Enable support for device-tree overlays
+DTC_FLAGS_am335x-bone += -@
+DTC_FLAGS_am335x-boneblack += -@
+DTC_FLAGS_am335x-boneblack-wireless += -@
+DTC_FLAGS_am335x-bonegreen += -@
+DTC_FLAGS_am335x-bonegreen-wireless += -@
+DTC_FLAGS_am335x-bonegreen-eco += -@

-- 
2.43.0

Re: [PATCH v2 1/3] ARM: dts: ti: Enable overlays for am335x BeagleBoard devicetrees

[Kevin Hilman]

On Mon, 16 Feb 2026 17:55:52 +0100, Kory Maincent (TI) wrote:
> Allow overlays to be applied to am335x BeagleBoard boards. This adds
> around ~40% to the total size of the DTB files on average.
> 
> 

Applied, thanks!

[1/3] ARM: dts: ti: Enable overlays for am335x BeagleBoard devicetrees
      commit: 18161bb01ede109fed41c66efa2624a4c27377f7

Best regards,
-- 
Kevin Hilman <khilman@baylibre.com>

Re: [PATCH v2 1/3] ARM: dts: ti: Enable overlays for am335x BeagleBoard devicetrees

[Kory Maincent]

Hello Kevin,

On Thu, 05 Mar 2026 17:07:23 -0800
Kevin Hilman <khilman@baylibre.com> wrote:

> On Mon, 16 Feb 2026 17:55:52 +0100, Kory Maincent (TI) wrote:
> > Allow overlays to be applied to am335x BeagleBoard boards. This adds
> > around ~40% to the total size of the DTB files on average.
> > 
> >   
> 
> Applied, thanks!
> 
> [1/3] ARM: dts: ti: Enable overlays for am335x BeagleBoard devicetrees
>       commit: 18161bb01ede109fed41c66efa2624a4c27377f7
> 
> Best regards,

Thanks for merging it.
I see that you have merged patch 1 and 2 in your for-next branch.
Is there a reason to not merge the patch 3? Are you waiting for a dts
maintainer ack?

Maybe I can resend only the 3rd patch to ping the dts maintainers.

Regards,
-- 
Köry Maincent, Bootlin
Embedded Linux and kernel engineering
https://bootlin.com

Re: [PATCH v2 1/3] ARM: dts: ti: Enable overlays for am335x BeagleBoard devicetrees

[Kevin Hilman]

Kory Maincent <kory.maincent@bootlin.com> writes:

> Hello Kevin,
>
> On Thu, 05 Mar 2026 17:07:23 -0800
> Kevin Hilman <khilman@baylibre.com> wrote:
>
>> On Mon, 16 Feb 2026 17:55:52 +0100, Kory Maincent (TI) wrote:
>> > Allow overlays to be applied to am335x BeagleBoard boards. This adds
>> > around ~40% to the total size of the DTB files on average.
>> > 
>> >   
>> 
>> Applied, thanks!
>> 
>> [1/3] ARM: dts: ti: Enable overlays for am335x BeagleBoard devicetrees
>>       commit: 18161bb01ede109fed41c66efa2624a4c27377f7
>> 
>> Best regards,
>
> Thanks for merging it.
> I see that you have merged patch 1 and 2 in your for-next branch.
> Is there a reason to not merge the patch 3? Are you waiting for a dts
> maintainer ack?
>
> Maybe I can resend only the 3rd patch to ping the dts maintainers.

Not necessary.  I'm not sure how/why I missed patch 3.  It's now queued
in my tree.

Thanks for letting me know,

Kevin

[PATCH v2 2/3] ARM: multi_v7_defconfig: omap2plus_defconfig: Enable ITE IT66121 driver

[Kory Maincent (TI)]

Enable the ITE IT66121 HDMI bridge driver to support HDMI output on
the BeagleBone Green with the Seeed Studio HDMI cape.

Enable CONFIG_DRM_TILCDC as a module on multi_v7_defconfig to provide
display support for TI AM335x-based SoCs in this kernel configuration.

Signed-off-by: Kory Maincent (TI) <kory.maincent@bootlin.com>
---

Changes in v2:
- Squash defconfig changes in one patch.
---
 arch/arm/configs/multi_v7_defconfig  | 2 ++
 arch/arm/configs/omap2plus_defconfig | 1 +
 2 files changed, 3 insertions(+)

diff --git a/arch/arm/configs/multi_v7_defconfig b/arch/arm/configs/multi_v7_defconfig
index 7f1fa9dd88c92..2c9587855f044 100644
--- a/arch/arm/configs/multi_v7_defconfig
+++ b/arch/arm/configs/multi_v7_defconfig
@@ -735,6 +735,7 @@ CONFIG_DRM_RCAR_DU=m
 CONFIG_DRM_SUN4I=m
 CONFIG_DRM_OMAP=m
 CONFIG_OMAP5_DSS_HDMI=y
+CONFIG_DRM_TILCDC=m
 CONFIG_DRM_MSM=m
 CONFIG_DRM_FSL_DCU=m
 CONFIG_DRM_TEGRA=y
@@ -750,6 +751,7 @@ CONFIG_DRM_PANEL_SAMSUNG_S6E63J0X03=m
 CONFIG_DRM_PANEL_SAMSUNG_S6E8AA0=m
 CONFIG_DRM_PANEL_SHARP_LQ101R1SX01=m
 CONFIG_DRM_DISPLAY_CONNECTOR=m
+CONFIG_DRM_ITE_IT66121=m
 CONFIG_DRM_LVDS_CODEC=m
 CONFIG_DRM_NXP_PTN3460=m
 CONFIG_DRM_PARADE_PS8622=m
diff --git a/arch/arm/configs/omap2plus_defconfig b/arch/arm/configs/omap2plus_defconfig
index 4e53c331cd841..cdf69ac2e5126 100644
--- a/arch/arm/configs/omap2plus_defconfig
+++ b/arch/arm/configs/omap2plus_defconfig
@@ -486,6 +486,7 @@ CONFIG_VIDEO_OMAP3=m
 CONFIG_VIDEO_MT9P031=m
 CONFIG_VIDEO_TVP5150=m
 CONFIG_DRM=m
+CONFIG_DRM_ITE_IT66121=m
 CONFIG_DRM_OMAP=m
 CONFIG_OMAP5_DSS_HDMI=y
 CONFIG_OMAP2_DSS_SDI=y

-- 
2.43.0

Re: [PATCH v2 2/3] ARM: multi_v7_defconfig: omap2plus_defconfig: Enable ITE IT66121 driver

[Krzysztof Kozlowski]

On 16/02/2026 17:55, Kory Maincent (TI) wrote:
> Enable the ITE IT66121 HDMI bridge driver to support HDMI output on
> the BeagleBone Green with the Seeed Studio HDMI cape.
> 
> Enable CONFIG_DRM_TILCDC as a module on multi_v7_defconfig to provide
> display support for TI AM335x-based SoCs in this kernel configuration.
> 
> Signed-off-by: Kory Maincent (TI) <kory.maincent@bootlin.com>
> ---
> 
> Changes in v2:
> - Squash defconfig changes in one patch.

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>

Best regards,
Krzysztof

[PATCH v2 3/3] ARM: dts: am335x: Add Seeed Studio BeagleBone HDMI cape overlay

[Kory Maincent (TI)]

Add devicetree overlay for the Seeed Studio BeagleBone HDMI cape, which
provides HDMI output via an ITE IT66121 HDMI bridge and audio support
through McASP.

The cape is designed for BeagleBone Green but is also compatible with
BeagleBone and BeagleBone Black due to pin compatibility.

Link: https://www.seeedstudio.com/Seeed-Studio-BeagleBoner-Green-HDMI-Cape.html
Signed-off-by: Kory Maincent (TI) <kory.maincent@bootlin.com>
---
 arch/arm/boot/dts/ti/omap/Makefile                 |   5 +
 .../boot/dts/ti/omap/am335x-bone-hdmi-00a0.dtso    | 157 +++++++++++++++++++++
 2 files changed, 162 insertions(+)

diff --git a/arch/arm/boot/dts/ti/omap/Makefile b/arch/arm/boot/dts/ti/omap/Makefile
index dcc6d4422e411..d70706e6d467b 100644
--- a/arch/arm/boot/dts/ti/omap/Makefile
+++ b/arch/arm/boot/dts/ti/omap/Makefile
@@ -82,6 +82,10 @@ dtb-$(CONFIG_ARCH_OMAP4) += \
 	omap4-var-stk-om44.dtb \
 	omap4-xyboard-mz609.dtb \
 	omap4-xyboard-mz617.dtb
+
+am335x-bonegreen-hdmi-00a0-dtbs := am335x-bonegreen-eco.dtb \
+	am335x-bone-hdmi-00a0.dtbo
+
 dtb-$(CONFIG_SOC_AM33XX) += \
 	am335x-baltos-ir2110.dtb \
 	am335x-baltos-ir3220.dtb \
@@ -94,6 +98,7 @@ dtb-$(CONFIG_SOC_AM33XX) += \
 	am335x-bonegreen.dtb \
 	am335x-bonegreen-wireless.dtb \
 	am335x-bonegreen-eco.dtb \
+	am335x-bonegreen-hdmi-00a0.dtb \
 	am335x-chiliboard.dtb \
 	am335x-cm-t335.dtb \
 	am335x-evm.dtb \
diff --git a/arch/arm/boot/dts/ti/omap/am335x-bone-hdmi-00a0.dtso b/arch/arm/boot/dts/ti/omap/am335x-bone-hdmi-00a0.dtso
new file mode 100644
index 0000000000000..f43f44c79c96d
--- /dev/null
+++ b/arch/arm/boot/dts/ti/omap/am335x-bone-hdmi-00a0.dtso
@@ -0,0 +1,157 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * 2017 Copyright (c) Seeed Technology Inc.  All right reserved.
+ * Author: Baozhu Zuo <zuobaozhu@gmail.com>
+ * Copyright (c) Bootlin 2026
+ *
+ * This device tree overlay is compatible with the BeagleBone Black, Green
+ * and their subversions.
+ */
+
+/dts-v1/;
+/plugin/;
+
+#include <dt-bindings/pinctrl/am33xx.h>
+#include <dt-bindings/interrupt-controller/irq.h>
+
+&{/} {
+	hdmi0: connector-hdmi {
+		compatible = "hdmi-connector";
+		label = "hdmi";
+		type = "a";
+		port {
+			hdmi_connector_in: endpoint {
+				remote-endpoint = <&it66121_out>;
+			};
+		};
+	};
+
+	clk_mcasp0_fixed: clk-mcasp0-fixed {
+		#clock-cells = <0>;
+		compatible = "fixed-clock";
+		clock-frequency = <24576000>;
+	};
+
+	clk_mcasp0: clk-mcasp0 {
+		#clock-cells = <0>;
+		compatible = "gpio-gate-clock";
+		clocks = <&clk_mcasp0_fixed>;
+		enable-gpios = <&gpio1 27 0>;
+	};
+
+	sound {
+		compatible = "simple-audio-card";
+		simple-audio-card,name = "TI BeagleBone Green HDMI cape";
+		simple-audio-card,format = "i2s";
+		simple-audio-card,bitclock-master = <&sound_master>;
+		simple-audio-card,frame-master = <&sound_master>;
+
+		sound_master: simple-audio-card,cpu {
+			sound-dai = <&mcasp0>;
+			clocks = <&clk_mcasp0>;
+		};
+
+		simple-audio-card,codec {
+			sound-dai = <&it66121>;
+		};
+	};
+};
+
+&am33xx_pinmux {
+	bb_lcd_pins: pinmux-bb-lcd-pins {
+		pinctrl-single,pins = <
+			AM33XX_PADCONF(AM335X_PIN_LCD_DATA0, PIN_OUTPUT, MUX_MODE0)
+			AM33XX_PADCONF(AM335X_PIN_LCD_DATA1, PIN_OUTPUT, MUX_MODE0)
+			AM33XX_PADCONF(AM335X_PIN_LCD_DATA2, PIN_OUTPUT, MUX_MODE0)
+			AM33XX_PADCONF(AM335X_PIN_LCD_DATA3, PIN_OUTPUT, MUX_MODE0)
+			AM33XX_PADCONF(AM335X_PIN_LCD_DATA4, PIN_OUTPUT, MUX_MODE0)
+			AM33XX_PADCONF(AM335X_PIN_LCD_DATA5, PIN_OUTPUT, MUX_MODE0)
+			AM33XX_PADCONF(AM335X_PIN_LCD_DATA6, PIN_OUTPUT, MUX_MODE0)
+			AM33XX_PADCONF(AM335X_PIN_LCD_DATA7, PIN_OUTPUT, MUX_MODE0)
+			AM33XX_PADCONF(AM335X_PIN_LCD_DATA8, PIN_OUTPUT, MUX_MODE0)
+			AM33XX_PADCONF(AM335X_PIN_LCD_DATA9, PIN_OUTPUT, MUX_MODE0)
+			AM33XX_PADCONF(AM335X_PIN_LCD_DATA10, PIN_OUTPUT, MUX_MODE0)
+			AM33XX_PADCONF(AM335X_PIN_LCD_DATA11, PIN_OUTPUT, MUX_MODE0)
+			AM33XX_PADCONF(AM335X_PIN_LCD_DATA12, PIN_OUTPUT, MUX_MODE0)
+			AM33XX_PADCONF(AM335X_PIN_LCD_DATA13, PIN_OUTPUT, MUX_MODE0)
+			AM33XX_PADCONF(AM335X_PIN_LCD_DATA14, PIN_OUTPUT, MUX_MODE0)
+			AM33XX_PADCONF(AM335X_PIN_LCD_DATA15, PIN_OUTPUT, MUX_MODE0)
+			AM33XX_PADCONF(AM335X_PIN_LCD_VSYNC, PIN_OUTPUT, MUX_MODE0)
+			AM33XX_PADCONF(AM335X_PIN_LCD_HSYNC, PIN_OUTPUT, MUX_MODE0)
+			AM33XX_PADCONF(AM335X_PIN_LCD_PCLK, PIN_OUTPUT, MUX_MODE0)
+			AM33XX_PADCONF(AM335X_PIN_LCD_AC_BIAS_EN, PIN_OUTPUT, MUX_MODE0)
+			AM33XX_PADCONF(AM335X_PIN_GPMC_ADVN_ALE, PIN_OUTPUT_PULLDOWN, MUX_MODE7)
+			AM33XX_PADCONF(AM335X_PIN_GPMC_OEN_REN, PIN_OUTPUT_PULLDOWN, MUX_MODE7)
+			AM33XX_PADCONF(AM335X_PIN_GPMC_WEN, PIN_INPUT, MUX_MODE7)
+		>;
+	};
+	mcasp0_pins: mcasp0-pins {
+		pinctrl-single,pins = <
+			AM33XX_PADCONF(AM335X_PIN_MCASP0_AHCLKX, PIN_INPUT_PULLUP, MUX_MODE0)
+			AM33XX_PADCONF(AM335X_PIN_MCASP0_AHCLKR, PIN_OUTPUT_PULLDOWN, MUX_MODE2)
+			AM33XX_PADCONF(AM335X_PIN_MCASP0_FSX, PIN_OUTPUT_PULLUP, MUX_MODE0)
+			AM33XX_PADCONF(AM335X_PIN_MCASP0_ACLKX, PIN_OUTPUT_PULLDOWN, MUX_MODE0)
+		>;
+	};
+};
+
+&i2c2 {
+	status = "okay";
+	#address-cells = <1>;
+	#size-cells = <0>;
+
+	it66121: it66121 {
+		compatible = "ite,it66121";
+		reg = <0x4d>;
+		pinctrl-names = "default";
+		pinctrl-0 = <&bb_lcd_pins>;
+
+		#sound-dai-cells = <0>;
+
+		interrupt-parent = <&gpio2>;
+		interrupts = <4 IRQ_TYPE_EDGE_RISING>;
+		ports {
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			port@0 {
+				reg = <0>;
+				it66121_in: endpoint {
+					bus-width = <24>;
+					remote-endpoint = <&lcdc_0>;
+				};
+			};
+
+			port@1 {
+				reg = <1>;
+				it66121_out: endpoint {
+					remote-endpoint = <&hdmi_connector_in>;
+				};
+			};
+		};
+	};
+};
+
+&lcdc {
+	status = "okay";
+	blue-and-red-wiring = "straight";
+	port {
+		lcdc_0: endpoint@0 {
+			remote-endpoint = <&it66121_in>;
+		};
+	};
+};
+
+
+&mcasp0 {
+	status = "okay";
+	#sound-dai-cells = <0>;
+	pinctrl-names = "default";
+	pinctrl-0 = <&mcasp0_pins>;
+	op-mode = <0>;
+	tdm-slots = <2>;
+	serial-dir = < 0 0 1 0 >;
+	tx-num-evt = <32>;
+	rx-num-evt = <32>;
+};
+

-- 
2.43.0

Re: [PATCH v2 0/3] Add support for Seeed Studio BeagleBone HDMI cape overlay

[Kory Maincent]

Hello,

On Mon, 16 Feb 2026 17:55:51 +0100
"Kory Maincent (TI)" <kory.maincent@bootlin.com> wrote:

> Add devicetree overlay for the Seeed Studio BeagleBone HDMI cape, which
> provides HDMI output via an ITE IT66121 HDMI bridge and audio support
> through McASP.
> 
> https://www.seeedstudio.com/Seeed-Studio-BeagleBoner-Green-HDMI-Cape.html
> 
> This overlay requires the recent tilcdc cleanup patch series that was merged
> to drm-misc-next to function properly:
> https://lore.kernel.org/lkml/20260123-feature_tilcdc-v5-0-5a44d2aa3f6f@bootlin.com/
> 
> With this DRM tree dependency I don't know if this series should land in
> DRM tree or in OMAP tree.

Any new on this patch series? After a few internal discussions I think it should
land in OMAP tree.

Regards,
-- 
Köry Maincent, Bootlin
Embedded Linux and kernel engineering
https://bootlin.com