[PATCH 0/8] arm64: dts: allwinner: h616: add LCD timing controller and display engine support

[PATCH 0/8] arm64: dts: allwinner: h616: add LCD timing controller and display engine support

[Ryan Walklin]

The H616 series of SoCs has an LCD timing controller as part of its display pipeline, capable of outputting to an LCD display, as well as HDMI and (depending on the SoC) composite TV signals. The pins are not exposed on all die variants, but the H700 variant is exposes RGB and LVDS pins. Building on the DE33 display engine patches on the list (https://lore.kernel.org/linux-sunxi/20250216085432.6373-2-ryan@testtoast.com), this patch series:

- adds the required device tree configuration for the display pipeline to the H616 (bus, display engine, mixer and timing controller)
- adds a quirk to the sun4i TCON driver for the Allwinner R40 (compatible with the H616/H618/H700/T507)
- describes the H616 RGB and LVDS GPIO pins
- adds the required pipeline endpoints to the device tree for the Anbernic RG35XX devices featuring this SoC
- adds LCD panel description, and required power supply configuration for the panel, backlight and GPIO pins for the RG35XX

Thanks to Jernej Skrabec for the initial out-of-tree patch for the T507.

Regards,

Ryan

Jernej Skrabec (4):
  arm64: dts: allwinner: h616: add display engine, bus and mixer nodes
  drm/sun4i: tcon: Add support for R40 LCD
  arm64: dts: allwinner: h616: Add TCON nodes to H616 DTSI
  arm64: dts: allwinner: h616: add LCD, LVDS and PWM pins

Ryan Walklin (4):
  bus: sun50i: add DE33 compatible string to the DE2 bus driver
  dt-bindings: allwinner: Add TCON_TOP and TCON_LCD clock/reset defines
  arm64: dts: allwinner: rg35xx: Enable LCD output
  arm64: dts: allwinner: rg35xx: Add GPIO backlight control

 .../arm64/boot/dts/allwinner/sun50i-h616.dtsi | 221 ++++++++++++++++++
 .../sun50i-h700-anbernic-rg35xx-2024.dts      |  64 +++++
 drivers/bus/sun50i-de2.c                      |   1 +
 drivers/gpu/drm/sun4i/sun4i_tcon.c            |   9 +
 include/dt-bindings/clock/sun8i-tcon-top.h    |   2 +
 5 files changed, 297 insertions(+)

-- 
2.48.1

[PATCH 1/8] bus: sun50i: add DE33 compatible string to the DE2 bus driver

[Ryan Walklin]

The Allwinner H616 series includes a newer display engine (DE33). Add a
compatible string to the existing bus driver.

Signed-off-by: Ryan Walklin <ryan@testtoast.com>
---
 drivers/bus/sun50i-de2.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/bus/sun50i-de2.c b/drivers/bus/sun50i-de2.c
index dfe588179acab..47c87d51a603b 100644
--- a/drivers/bus/sun50i-de2.c
+++ b/drivers/bus/sun50i-de2.c
@@ -31,6 +31,7 @@ static void sun50i_de2_bus_remove(struct platform_device *pdev)
 
 static const struct of_device_id sun50i_de2_bus_of_match[] = {
 	{ .compatible = "allwinner,sun50i-a64-de2", },
+	{ .compatible = "allwinner,sun50i-h616-de33", },
 	{ /* sentinel */ }
 };
 
-- 
2.48.1

Re: [PATCH 1/8] bus: sun50i: add DE33 compatible string to the DE2 bus driver

[Jernej Škrabec]

Dne nedelja, 16. februar 2025 ob 10:27:08 Srednjeevropski standardni čas je Ryan Walklin napisal(a):
> The Allwinner H616 series includes a newer display engine (DE33). Add a
> compatible string to the existing bus driver.
> 
> Signed-off-by: Ryan Walklin <ryan@testtoast.com>
> ---
>  drivers/bus/sun50i-de2.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/bus/sun50i-de2.c b/drivers/bus/sun50i-de2.c
> index dfe588179acab..47c87d51a603b 100644
> --- a/drivers/bus/sun50i-de2.c
> +++ b/drivers/bus/sun50i-de2.c
> @@ -31,6 +31,7 @@ static void sun50i_de2_bus_remove(struct platform_device *pdev)
>  
>  static const struct of_device_id sun50i_de2_bus_of_match[] = {
>  	{ .compatible = "allwinner,sun50i-a64-de2", },
> +	{ .compatible = "allwinner,sun50i-h616-de33", },

Since there is no functionality change, just go with h616 compatible with a64
fallback. No need to change the driver.

Best regards,
Jernej

>  	{ /* sentinel */ }
>  };
>  
> 

Re: [PATCH 1/8] bus: sun50i: add DE33 compatible string to the DE2 bus driver

[Ryan Walklin]

On Sat, 22 Feb 2025, at 10:35 PM, Jernej Škrabec wrote:
> Dne nedelja, 16. februar 2025 ob 10:27:08 Srednjeevropski standardni 
> čas je Ryan Walklin napisal(a):
>>  static const struct of_device_id sun50i_de2_bus_of_match[] = {
>>  	{ .compatible = "allwinner,sun50i-a64-de2", },
>> +	{ .compatible = "allwinner,sun50i-h616-de33", },
>
> Since there is no functionality change, just go with h616 compatible with a64
> fallback. No need to change the driver.
>
Noted, thanks.

Regards,

Ryan

[PATCH 2/8] arm64: dts: allwinner: h616: add display engine, bus and mixer nodes

[Ryan Walklin]

From: Jernej Skrabec <jernej.skrabec@gmail.com>

The Allwinner H616 and variants (H618, H700 and T507) have a new display
engine variant (DE33). Support has been added to the existing DE2/DE3
sun4i driver in a previous patch series (x). The variant is selected via
the appropriate mixer device tree compatible string.

Add the respective device-tree nodes for the DE, bus, clock and mixer to
the H616 DTSI, and the matching SRAM section for the DE.

Signed-off-by: Jernej Skrabec <jernej.skrabec@gmail.com>
Signed-off-by: Ryan Walklin <ryan@testtoast.com>
---
 .../arm64/boot/dts/allwinner/sun50i-h616.dtsi | 56 +++++++++++++++++++
 1 file changed, 56 insertions(+)

diff --git a/arch/arm64/boot/dts/allwinner/sun50i-h616.dtsi b/arch/arm64/boot/dts/allwinner/sun50i-h616.dtsi
index cdce3dcb8ec02..ab8b70ce7df89 100644
--- a/arch/arm64/boot/dts/allwinner/sun50i-h616.dtsi
+++ b/arch/arm64/boot/dts/allwinner/sun50i-h616.dtsi
@@ -94,6 +94,12 @@ l2_cache: l2-cache {
 		};
 	};
 
+	de: display-engine {
+		compatible = "allwinner,sun50i-h6-display-engine";
+		allwinner,pipelines = <&mixer0>;
+		status = "disabled";
+	};
+
 	reserved-memory {
 		#address-cells = <2>;
 		#size-cells = <2>;
@@ -150,6 +156,51 @@ soc {
 		#size-cells = <1>;
 		ranges = <0x0 0x0 0x0 0x40000000>;
 
+		bus: bus@1000000 {
+			compatible = "allwinner,sun50i-h616-de33",
+				     "allwinner,sun50i-a64-de2";
+			reg = <0x1000000 0x400000>;
+			allwinner,sram = <&de3_sram 1>;
+			#address-cells = <1>;
+			#size-cells = <1>;
+			ranges = <0 0x1000000 0x400000>;
+
+			display_clocks: clock@8000 {
+				compatible = "allwinner,sun50i-h616-de33-clk";
+				reg = <0x8000 0x100>;
+				clocks = <&ccu CLK_DE>, <&ccu CLK_BUS_DE>;
+				clock-names = "mod", "bus";
+				resets = <&ccu RST_BUS_DE>;
+				#clock-cells = <1>;
+				#reset-cells = <1>;
+			};
+
+			mixer0: mixer@100000 {
+				compatible = "allwinner,sun50i-h616-de33-mixer-0";
+				reg = <0x100000 0x100000>,
+				      <0x8100 0x40>,
+				      <0x280000 0x20000>;
+				clocks = <&display_clocks CLK_BUS_MIXER0>,
+					 <&display_clocks CLK_MIXER0>;
+				clock-names = "bus", "mod";
+				resets = <&display_clocks RST_MIXER0>;
+				iommus = <&iommu 0>;
+
+				ports {
+					#address-cells = <1>;
+					#size-cells = <0>;
+
+					mixer0_out: port@1 {
+						reg = <1>;
+
+						mixer0_out_tcon_top_mixer0: endpoint {
+							remote-endpoint = <&tcon_top_mixer0_in_mixer0>;
+						};
+					};
+				};
+			};
+		};
+
 		crypto: crypto@1904000 {
 			compatible = "allwinner,sun50i-h616-crypto";
 			reg = <0x01904000 0x800>;
@@ -173,6 +224,11 @@ sram_c: sram@28000 {
 				#address-cells = <1>;
 				#size-cells = <1>;
 				ranges = <0 0x00028000 0x30000>;
+
+				de3_sram: sram-section@0 {
+					compatible = "allwinner,sun50i-a64-sram-c";
+					reg = <0x0000 0x1e000>;
+				};
 			};
 		};
 
-- 
2.48.1

Re: [PATCH 2/8] arm64: dts: allwinner: h616: add display engine, bus and mixer nodes

[Andre Przywara]

On Sun, 16 Feb 2025 22:27:09 +1300
Ryan Walklin <ryan@testtoast.com> wrote:

Hi,

> From: Jernej Skrabec <jernej.skrabec@gmail.com>
> 
> The Allwinner H616 and variants (H618, H700 and T507) have a new display
> engine variant (DE33). Support has been added to the existing DE2/DE3
> sun4i driver in a previous patch series (x). The variant is selected via
> the appropriate mixer device tree compatible string.
> 
> Add the respective device-tree nodes for the DE, bus, clock and mixer to
> the H616 DTSI, and the matching SRAM section for the DE.
> 
> Signed-off-by: Jernej Skrabec <jernej.skrabec@gmail.com>
> Signed-off-by: Ryan Walklin <ryan@testtoast.com>
> ---
>  .../arm64/boot/dts/allwinner/sun50i-h616.dtsi | 56 +++++++++++++++++++
>  1 file changed, 56 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/allwinner/sun50i-h616.dtsi b/arch/arm64/boot/dts/allwinner/sun50i-h616.dtsi
> index cdce3dcb8ec02..ab8b70ce7df89 100644
> --- a/arch/arm64/boot/dts/allwinner/sun50i-h616.dtsi
> +++ b/arch/arm64/boot/dts/allwinner/sun50i-h616.dtsi
> @@ -94,6 +94,12 @@ l2_cache: l2-cache {
>  		};
>  	};
>  
> +	de: display-engine {
> +		compatible = "allwinner,sun50i-h6-display-engine";

That should either be sun50i-h616-display-engine, or it should use a
fallback. IIUC this "device" is just something more or less artificial
that ties things together? I don't see any differences between the
latest SoCs in the driver, but still we seem to use a separate compatible
for every SoC there, which I guess is intentional?

> +		allwinner,pipelines = <&mixer0>;
> +		status = "disabled";
> +	};
> +
>  	reserved-memory {
>  		#address-cells = <2>;
>  		#size-cells = <2>;
> @@ -150,6 +156,51 @@ soc {
>  		#size-cells = <1>;
>  		ranges = <0x0 0x0 0x0 0x40000000>;
>  
> +		bus: bus@1000000 {
> +			compatible = "allwinner,sun50i-h616-de33",
> +				     "allwinner,sun50i-a64-de2";
> +			reg = <0x1000000 0x400000>;
> +			allwinner,sram = <&de3_sram 1>;

Should this label be de33_sram?

> +			#address-cells = <1>;
> +			#size-cells = <1>;
> +			ranges = <0 0x1000000 0x400000>;
> +
> +			display_clocks: clock@8000 {
> +				compatible = "allwinner,sun50i-h616-de33-clk";
> +				reg = <0x8000 0x100>;
> +				clocks = <&ccu CLK_DE>, <&ccu CLK_BUS_DE>;
> +				clock-names = "mod", "bus";
> +				resets = <&ccu RST_BUS_DE>;
> +				#clock-cells = <1>;
> +				#reset-cells = <1>;
> +			};
> +
> +			mixer0: mixer@100000 {
> +				compatible = "allwinner,sun50i-h616-de33-mixer-0";
> +				reg = <0x100000 0x100000>,
> +				      <0x8100 0x40>,
> +				      <0x280000 0x20000>;

As mentioned in the binding patch, I think having reg-names here would
help to make it clearer what those regions are for.

> +				clocks = <&display_clocks CLK_BUS_MIXER0>,
> +					 <&display_clocks CLK_MIXER0>;
> +				clock-names = "bus", "mod";
> +				resets = <&display_clocks RST_MIXER0>;
> +				iommus = <&iommu 0>;
> +
> +				ports {
> +					#address-cells = <1>;
> +					#size-cells = <0>;
> +
> +					mixer0_out: port@1 {
> +						reg = <1>;
> +
> +						mixer0_out_tcon_top_mixer0: endpoint {
> +							remote-endpoint = <&tcon_top_mixer0_in_mixer0>;
> +						};
> +					};
> +				};
> +			};
> +		};
> +
>  		crypto: crypto@1904000 {
>  			compatible = "allwinner,sun50i-h616-crypto";
>  			reg = <0x01904000 0x800>;
> @@ -173,6 +224,11 @@ sram_c: sram@28000 {
>  				#address-cells = <1>;
>  				#size-cells = <1>;
>  				ranges = <0 0x00028000 0x30000>;
> +
> +				de3_sram: sram-section@0 {

de33_sram?

> +					compatible = "allwinner,sun50i-a64-sram-c";

I think we need a new compatible, with the A64 as a fallback. The H6 seems
to do this as well.

Cheers,
Andre

> +					reg = <0x0000 0x1e000>;
> +				};
>  			};
>  		};
>  

[PATCH 3/8] dt-bindings: allwinner: Add TCON_TOP and TCON_LCD clock/reset defines

[Ryan Walklin]

The Allwinner H700 exposes RGB and LVDS pins as well as a HDMI
connector. This requires additional clocks for the TCON_TOP and clock
and resets for the TCON_LCD LCD controllers to be defined as per the
T507 datasheet (which shares the same die).

Signed-off-by: Ryan Walklin <ryan@testtoast.com>
---
 include/dt-bindings/clock/sun8i-tcon-top.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/include/dt-bindings/clock/sun8i-tcon-top.h b/include/dt-bindings/clock/sun8i-tcon-top.h
index 25164d7678353..2a12d047d2e13 100644
--- a/include/dt-bindings/clock/sun8i-tcon-top.h
+++ b/include/dt-bindings/clock/sun8i-tcon-top.h
@@ -7,5 +7,7 @@
 #define CLK_TCON_TOP_TV0	0
 #define CLK_TCON_TOP_TV1	1
 #define CLK_TCON_TOP_DSI	2
+#define CLK_TCON_TOP_LCD0	3
+#define CLK_TCON_TOP_LCD1	4
 
 #endif /* _DT_BINDINGS_CLOCK_SUN8I_TCON_TOP_H_ */
-- 
2.48.1

Re: [PATCH 3/8] dt-bindings: allwinner: Add TCON_TOP and TCON_LCD clock/reset defines

[Rob Herring (Arm)]

On Sun, 16 Feb 2025 22:27:10 +1300, Ryan Walklin wrote:
> The Allwinner H700 exposes RGB and LVDS pins as well as a HDMI
> connector. This requires additional clocks for the TCON_TOP and clock
> and resets for the TCON_LCD LCD controllers to be defined as per the
> T507 datasheet (which shares the same die).
> 
> Signed-off-by: Ryan Walklin <ryan@testtoast.com>
> ---
>  include/dt-bindings/clock/sun8i-tcon-top.h | 2 ++
>  1 file changed, 2 insertions(+)
> 

Acked-by: Rob Herring (Arm) <robh@kernel.org>

[PATCH 4/8] drm/sun4i: tcon: Add support for R40 LCD

[Ryan Walklin]

From: Jernej Skrabec <jernej.skrabec@gmail.com>

The Allwinner H616 and related SOCs have an LCD timing controller
(TCON) which is compatible with the R40 SOC's controller and existing
sun4i driver. The H616 does not expose this controller but the H700 and
T507 (based on the same die) do. The controller supports LVDS and RGB
output.

Add quirks and compatible string to cover these SOCs.

Signed-off-by: Jernej Skrabec <jernej.skrabec@gmail.com>
Signed-off-by: Ryan Walklin <ryan@testtoast.com>
---
 drivers/gpu/drm/sun4i/sun4i_tcon.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/gpu/drm/sun4i/sun4i_tcon.c b/drivers/gpu/drm/sun4i/sun4i_tcon.c
index 4cd3a07daf6e4..d364e814fde26 100644
--- a/drivers/gpu/drm/sun4i/sun4i_tcon.c
+++ b/drivers/gpu/drm/sun4i/sun4i_tcon.c
@@ -1528,6 +1528,14 @@ static const struct sun4i_tcon_quirks sun8i_a83t_tv_quirks = {
 	.has_channel_1		= true,
 };
 
+static const struct sun4i_tcon_quirks sun8i_r40_lcd_quirks = {
+	.supports_lvds		= true,
+	.has_channel_0		= true,
+	.set_mux		= sun8i_r40_tcon_tv_set_mux,
+	.dclk_min_div		= 1,
+	.setup_lvds_phy		= sun6i_tcon_setup_lvds_phy,
+};
+
 static const struct sun4i_tcon_quirks sun8i_r40_tv_quirks = {
 	.has_channel_1		= true,
 	.polarity_in_ch0	= true,
@@ -1569,6 +1577,7 @@ const struct of_device_id sun4i_tcon_of_table[] = {
 	{ .compatible = "allwinner,sun8i-a33-tcon", .data = &sun8i_a33_quirks },
 	{ .compatible = "allwinner,sun8i-a83t-tcon-lcd", .data = &sun8i_a83t_lcd_quirks },
 	{ .compatible = "allwinner,sun8i-a83t-tcon-tv", .data = &sun8i_a83t_tv_quirks },
+	{ .compatible = "allwinner,sun8i-r40-tcon-lcd", .data = &sun8i_r40_lcd_quirks },
 	{ .compatible = "allwinner,sun8i-r40-tcon-tv", .data = &sun8i_r40_tv_quirks },
 	{ .compatible = "allwinner,sun8i-v3s-tcon", .data = &sun8i_v3s_quirks },
 	{ .compatible = "allwinner,sun9i-a80-tcon-lcd", .data = &sun9i_a80_tcon_lcd_quirks },
-- 
2.48.1

[PATCH 5/8] arm64: dts: allwinner: h616: Add TCON nodes to H616 DTSI

[Ryan Walklin]

From: Jernej Skrabec <jernej.skrabec@gmail.com>

The Allwinner H616 has a display pipeline similar to other Allwinner
devices, specifically the A10, but using a newer display engine
revision (DE33).

Not all output pins are exposed on all package variants, for example
only the H700 and T507 have LCD pins exposed, but all variants support
HDMI output. However on the die these are connected to a display engine
via a TCON TOP and one or more timing controllers (TCONs).

HDMI output support is not provided in this series (but will be in a
subsequent patch) so for now note this within the relevant node to
prevent a DT compiler error.

Add TCON nodes for the TOP, and the LCD and TV timing controllers. The
timing controllers are compatible with the existing R40 driver.

Signed-off-by: Jernej Skrabec <jernej.skrabec@gmail.com>
Signed-off-by: Ryan Walklin <ryan@testtoast.com>
---
 .../arm64/boot/dts/allwinner/sun50i-h616.dtsi | 133 ++++++++++++++++++
 1 file changed, 133 insertions(+)

diff --git a/arch/arm64/boot/dts/allwinner/sun50i-h616.dtsi b/arch/arm64/boot/dts/allwinner/sun50i-h616.dtsi
index ab8b70ce7df89..242bac95840f8 100644
--- a/arch/arm64/boot/dts/allwinner/sun50i-h616.dtsi
+++ b/arch/arm64/boot/dts/allwinner/sun50i-h616.dtsi
@@ -7,9 +7,12 @@
 #include <dt-bindings/clock/sun50i-h616-ccu.h>
 #include <dt-bindings/clock/sun50i-h6-r-ccu.h>
 #include <dt-bindings/clock/sun6i-rtc.h>
+#include <dt-bindings/clock/sun8i-de2.h>
+#include <dt-bindings/clock/sun8i-tcon-top.h>
 #include <dt-bindings/reset/sun50i-h616-ccu.h>
 #include <dt-bindings/reset/sun50i-h6-r-ccu.h>
 #include <dt-bindings/thermal/thermal.h>
+#include <dt-bindings/reset/sun8i-de2.h>
 
 / {
 	interrupt-parent = <&gic>;
@@ -909,6 +912,136 @@ ohci3: usb@5311400 {
 			status = "disabled";
 		};
 
+		tcon_top: tcon-top@6510000 {
+			compatible = "allwinner,sun50i-h6-tcon-top";
+			reg = <0x06510000 0x1000>;
+			clocks = <&ccu CLK_BUS_TCON_TOP>,
+				 <&ccu CLK_TCON_TV0>;
+			clock-names = "bus", "tcon-tv0";
+			clock-output-names = "tcon-top-tv0";
+			#clock-cells = <0>;
+			resets = <&ccu RST_BUS_TCON_TOP>;
+
+			ports {
+				#address-cells = <1>;
+				#size-cells = <0>;
+
+				tcon_top_mixer0_in: port@0 {
+					#address-cells = <1>;
+					#size-cells = <0>;
+					reg = <0>;
+
+					tcon_top_mixer0_in_mixer0: endpoint@0 {
+						reg = <0>;
+						remote-endpoint = <&mixer0_out_tcon_top_mixer0>;
+					};
+				};
+
+				tcon_top_mixer0_out: port@1 {
+					#address-cells = <1>;
+					#size-cells = <0>;
+					reg = <1>;
+
+					tcon_top_mixer0_out_tcon_lcd0: endpoint@0 {
+						reg = <0>;
+						remote-endpoint = <&tcon_lcd0_in_tcon_top_mixer0>;
+					};
+
+					tcon_top_mixer0_out_tcon_tv0: endpoint@2 {
+						reg = <2>;
+						remote-endpoint = <&tcon_tv0_in_tcon_top_mixer0>;
+					};
+				};
+
+				tcon_top_hdmi_in: port@4 {
+					#address-cells = <1>;
+					#size-cells = <0>;
+					reg = <4>;
+
+					tcon_top_hdmi_in_tcon_tv0: endpoint@0 {
+						reg = <0>;
+						remote-endpoint = <&tcon_tv0_out_tcon_top>;
+					};
+				};
+
+				tcon_top_hdmi_out: port@5 {
+					reg = <5>;
+
+					tcon_top_hdmi_out_hdmi: endpoint {
+						/* placeholder for HDMI  - remote-endpoint = <&hdmi_in_tcon_top>;*/
+					};
+				};
+			};
+		};
+		
+		tcon_lcd0: lcd-controller@6511000 {
+			compatible = "allwinner,sun8i-r40-tcon-lcd";
+			reg = <0x06511000 0x1000>;
+			interrupts = <GIC_SPI 64 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&ccu CLK_BUS_TCON_LCD0>, <&ccu CLK_TCON_LCD0>;
+			clock-names = "ahb", "tcon-ch0";
+			clock-output-names = "tcon-data-clock";
+			#clock-cells = <0>;
+			resets = <&ccu RST_BUS_TCON_LCD0>, <&ccu RST_BUS_TCON_LCD1>;
+			reset-names = "lcd", "lvds";
+			status = "disabled";
+
+			ports {
+				#address-cells = <1>;
+				#size-cells = <0>;
+
+				tcon_lcd0_in: port@0 {
+					reg = <0>;
+
+					tcon_lcd0_in_tcon_top_mixer0: endpoint {
+						remote-endpoint = <&tcon_top_mixer0_out_tcon_lcd0>;
+					};
+				};
+
+				tcon_lcd0_out: port@1 {
+					reg = <1>;
+				};
+			};
+		};
+		
+		tcon_tv0: lcd-controller@6515000 {
+			compatible = "allwinner,sun50i-h6-tcon-tv",
+				     "allwinner,sun8i-r40-tcon-tv";
+			reg = <0x06515000 0x1000>;
+			interrupts = <GIC_SPI 66 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&ccu CLK_BUS_TCON_TV0>,
+				 <&tcon_top CLK_TCON_TOP_TV0>;
+			clock-names = "ahb", "tcon-ch1";
+			#clock-cells = <0>;
+			resets = <&ccu RST_BUS_TCON_TV0>;
+			reset-names = "lcd";
+			status = "disabled";
+
+			ports {
+				#address-cells = <1>;
+				#size-cells = <0>;
+
+				tcon_tv0_in: port@0 {
+					reg = <0>;
+
+					tcon_tv0_in_tcon_top_mixer0: endpoint {
+						remote-endpoint = <&tcon_top_mixer0_out_tcon_tv0>;
+					};
+				};
+
+				tcon_tv0_out: port@1 {
+					#address-cells = <1>;
+					#size-cells = <0>;
+					reg = <1>;
+
+					tcon_tv0_out_tcon_top: endpoint@1 {
+						reg = <1>;
+						remote-endpoint = <&tcon_top_hdmi_in_tcon_tv0>;
+					};
+				};
+			};
+		};
+
 		rtc: rtc@7000000 {
 			compatible = "allwinner,sun50i-h616-rtc";
 			reg = <0x07000000 0x400>;
-- 
2.48.1

Re: [PATCH 5/8] arm64: dts: allwinner: h616: Add TCON nodes to H616 DTSI

[Jernej Škrabec]

Dne nedelja, 16. februar 2025 ob 10:27:12 Srednjeevropski standardni čas je Ryan Walklin napisal(a):
> From: Jernej Skrabec <jernej.skrabec@gmail.com>
> 
> The Allwinner H616 has a display pipeline similar to other Allwinner
> devices, specifically the A10, but using a newer display engine
> revision (DE33).
> 
> Not all output pins are exposed on all package variants, for example
> only the H700 and T507 have LCD pins exposed, but all variants support
> HDMI output. However on the die these are connected to a display engine
> via a TCON TOP and one or more timing controllers (TCONs).
> 
> HDMI output support is not provided in this series (but will be in a
> subsequent patch) so for now note this within the relevant node to
> prevent a DT compiler error.
> 
> Add TCON nodes for the TOP, and the LCD and TV timing controllers. The
> timing controllers are compatible with the existing R40 driver.
> 
> Signed-off-by: Jernej Skrabec <jernej.skrabec@gmail.com>
> Signed-off-by: Ryan Walklin <ryan@testtoast.com>
> ---
>  .../arm64/boot/dts/allwinner/sun50i-h616.dtsi | 133 ++++++++++++++++++
>  1 file changed, 133 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/allwinner/sun50i-h616.dtsi b/arch/arm64/boot/dts/allwinner/sun50i-h616.dtsi
> index ab8b70ce7df89..242bac95840f8 100644
> --- a/arch/arm64/boot/dts/allwinner/sun50i-h616.dtsi
> +++ b/arch/arm64/boot/dts/allwinner/sun50i-h616.dtsi
> @@ -7,9 +7,12 @@
>  #include <dt-bindings/clock/sun50i-h616-ccu.h>
>  #include <dt-bindings/clock/sun50i-h6-r-ccu.h>
>  #include <dt-bindings/clock/sun6i-rtc.h>
> +#include <dt-bindings/clock/sun8i-de2.h>
> +#include <dt-bindings/clock/sun8i-tcon-top.h>
>  #include <dt-bindings/reset/sun50i-h616-ccu.h>
>  #include <dt-bindings/reset/sun50i-h6-r-ccu.h>
>  #include <dt-bindings/thermal/thermal.h>
> +#include <dt-bindings/reset/sun8i-de2.h>
>  
>  / {
>  	interrupt-parent = <&gic>;
> @@ -909,6 +912,136 @@ ohci3: usb@5311400 {
>  			status = "disabled";
>  		};
>  
> +		tcon_top: tcon-top@6510000 {
> +			compatible = "allwinner,sun50i-h6-tcon-top";
> +			reg = <0x06510000 0x1000>;
> +			clocks = <&ccu CLK_BUS_TCON_TOP>,
> +				 <&ccu CLK_TCON_TV0>;
> +			clock-names = "bus", "tcon-tv0";
> +			clock-output-names = "tcon-top-tv0";
> +			#clock-cells = <0>;
> +			resets = <&ccu RST_BUS_TCON_TOP>;
> +
> +			ports {
> +				#address-cells = <1>;
> +				#size-cells = <0>;
> +
> +				tcon_top_mixer0_in: port@0 {
> +					#address-cells = <1>;
> +					#size-cells = <0>;
> +					reg = <0>;
> +
> +					tcon_top_mixer0_in_mixer0: endpoint@0 {
> +						reg = <0>;
> +						remote-endpoint = <&mixer0_out_tcon_top_mixer0>;
> +					};
> +				};
> +
> +				tcon_top_mixer0_out: port@1 {
> +					#address-cells = <1>;
> +					#size-cells = <0>;
> +					reg = <1>;
> +
> +					tcon_top_mixer0_out_tcon_lcd0: endpoint@0 {
> +						reg = <0>;
> +						remote-endpoint = <&tcon_lcd0_in_tcon_top_mixer0>;
> +					};
> +
> +					tcon_top_mixer0_out_tcon_tv0: endpoint@2 {
> +						reg = <2>;
> +						remote-endpoint = <&tcon_tv0_in_tcon_top_mixer0>;
> +					};
> +				};
> +
> +				tcon_top_hdmi_in: port@4 {
> +					#address-cells = <1>;
> +					#size-cells = <0>;
> +					reg = <4>;
> +
> +					tcon_top_hdmi_in_tcon_tv0: endpoint@0 {
> +						reg = <0>;
> +						remote-endpoint = <&tcon_tv0_out_tcon_top>;
> +					};
> +				};
> +
> +				tcon_top_hdmi_out: port@5 {
> +					reg = <5>;
> +
> +					tcon_top_hdmi_out_hdmi: endpoint {
> +						/* placeholder for HDMI  - remote-endpoint = <&hdmi_in_tcon_top>;*/
> +					};
> +				};
> +			};
> +		};
> +		
> +		tcon_lcd0: lcd-controller@6511000 {
> +			compatible = "allwinner,sun8i-r40-tcon-lcd";
> +			reg = <0x06511000 0x1000>;
> +			interrupts = <GIC_SPI 64 IRQ_TYPE_LEVEL_HIGH>;
> +			clocks = <&ccu CLK_BUS_TCON_LCD0>, <&ccu CLK_TCON_LCD0>;
> +			clock-names = "ahb", "tcon-ch0";
> +			clock-output-names = "tcon-data-clock";
> +			#clock-cells = <0>;
> +			resets = <&ccu RST_BUS_TCON_LCD0>, <&ccu RST_BUS_TCON_LCD1>;
> +			reset-names = "lcd", "lvds";

That's not true, is it? LVDS should be LVDS reset. Check my WIP patch:
https://github.com/jernejsk/linux-1/commit/8b090dc866d4c4b5b0a1804da021a9f44c67d5f1

It turns out that H616 clock driver missed LVDS reset, as it can be seen here:
https://github.com/jernejsk/linux-1/commit/88bad1a59876f5d385bcd45a363784ed2beec6ae#diff-b340c978bcdbe240f7b99f4d0d96ea130a8acb1a5786a8efbb24d9e7a0b14e53R1084

I also commented on this series:
https://lore.kernel.org/linux-sunxi/20250213172248.158447-1-macroalpha82@gmail.com/T/#t

Best regards,
Jernej

> +			status = "disabled";
> +
> +			ports {
> +				#address-cells = <1>;
> +				#size-cells = <0>;
> +
> +				tcon_lcd0_in: port@0 {
> +					reg = <0>;
> +
> +					tcon_lcd0_in_tcon_top_mixer0: endpoint {
> +						remote-endpoint = <&tcon_top_mixer0_out_tcon_lcd0>;
> +					};
> +				};
> +
> +				tcon_lcd0_out: port@1 {
> +					reg = <1>;
> +				};
> +			};
> +		};
> +		
> +		tcon_tv0: lcd-controller@6515000 {
> +			compatible = "allwinner,sun50i-h6-tcon-tv",
> +				     "allwinner,sun8i-r40-tcon-tv";
> +			reg = <0x06515000 0x1000>;
> +			interrupts = <GIC_SPI 66 IRQ_TYPE_LEVEL_HIGH>;
> +			clocks = <&ccu CLK_BUS_TCON_TV0>,
> +				 <&tcon_top CLK_TCON_TOP_TV0>;
> +			clock-names = "ahb", "tcon-ch1";
> +			#clock-cells = <0>;
> +			resets = <&ccu RST_BUS_TCON_TV0>;
> +			reset-names = "lcd";
> +			status = "disabled";
> +
> +			ports {
> +				#address-cells = <1>;
> +				#size-cells = <0>;
> +
> +				tcon_tv0_in: port@0 {
> +					reg = <0>;
> +
> +					tcon_tv0_in_tcon_top_mixer0: endpoint {
> +						remote-endpoint = <&tcon_top_mixer0_out_tcon_tv0>;
> +					};
> +				};
> +
> +				tcon_tv0_out: port@1 {
> +					#address-cells = <1>;
> +					#size-cells = <0>;
> +					reg = <1>;
> +
> +					tcon_tv0_out_tcon_top: endpoint@1 {
> +						reg = <1>;
> +						remote-endpoint = <&tcon_top_hdmi_in_tcon_tv0>;
> +					};
> +				};
> +			};
> +		};
> +
>  		rtc: rtc@7000000 {
>  			compatible = "allwinner,sun50i-h616-rtc";
>  			reg = <0x07000000 0x400>;
> 

Re: [PATCH 5/8] arm64: dts: allwinner: h616: Add TCON nodes to H616 DTSI

[Ryan Walklin]

On Sat, 22 Feb 2025, at 10:45 PM, Jernej Škrabec wrote:
> Dne nedelja, 16. februar 2025 ob 10:27:12 Srednjeevropski standardni 
>> Add TCON nodes for the TOP, and the LCD and TV timing controllers. The
>> timing controllers are compatible with the existing R40 driver.
>> +			resets = <&ccu RST_BUS_TCON_LCD0>, <&ccu RST_BUS_TCON_LCD1>;
>> +			reset-names = "lcd", "lvds";
>
> That's not true, is it? LVDS should be LVDS reset. Check my WIP patch:
> https://github.com/jernejsk/linux-1/commit/8b090dc866d4c4b5b0a1804da021a9f44c67d5f1

Thanks, will correct for next version.

> It turns out that H616 clock driver missed LVDS reset, as it can be 
> seen here:
> https://github.com/jernejsk/linux-1/commit/88bad1a59876f5d385bcd45a363784ed2beec6ae#diff-b340c978bcdbe240f7b99f4d0d96ea130a8acb1a5786a8efbb24d9e7a0b14e53R1084
>
> I also commented on this series:
> https://lore.kernel.org/linux-sunxi/20250213172248.158447-1-macroalpha82@gmail.com/T/#t

Thanks, I will add those in for next version with this patch.

Regards,

Ryan

[PATCH 6/8] arm64: dts: allwinner: h616: add LCD, LVDS and PWM pins

[Ryan Walklin]

From: Jernej Skrabec <jernej.skrabec@gmail.com>

The Allwinner H616 (and its H618, H700 and T507 package variants with
the same die) have 28 video output pins for RGB/SPI and LVDS display.
These are in GPIO Bank D and are multiplexed.

In RGB mode, pins PD0-PD23 are for 24-bit RGB pixel output, pins
PD24-PD27 are for clock, DE, HSYNC and VSYNC, and PD28 is a PWM
backlight control.

In LVDS mode, pins PD0-PD9 are for LVDS0 and LVDS1, and can be
configured by the H616 display engine for either one high-resolution
(dual link) or two low resolution displays.

Add device tree nodes for the LCD, LVDS0, LVDS1 and PWM pins.

Signed-off-by: Jernej Skrabec <jernej.skrabec@gmail.com>
[ryan@testtoast.com: add RGB, LVDS1 and PWM pin assignments]
Signed-off-by: Ryan Walklin <ryan@testtoast.com>
---
 .../arm64/boot/dts/allwinner/sun50i-h616.dtsi | 32 +++++++++++++++++++
 1 file changed, 32 insertions(+)

diff --git a/arch/arm64/boot/dts/allwinner/sun50i-h616.dtsi b/arch/arm64/boot/dts/allwinner/sun50i-h616.dtsi
index 242bac95840f8..806ad87705abc 100644
--- a/arch/arm64/boot/dts/allwinner/sun50i-h616.dtsi
+++ b/arch/arm64/boot/dts/allwinner/sun50i-h616.dtsi
@@ -322,6 +322,32 @@ ir_rx_pin: ir-rx-pin {
 				function = "ir_rx";
 			};
 
+			/omit-if-no-ref/
+			lcd0_rgb888_pins: lcd0-rgb888-pins {
+				pins = "PD0", "PD1", "PD2", "PD3",
+				       "PD4", "PD5", "PD6", "PD7",
+				       "PD8", "PD9", "PD10", "PD11",
+				       "PD12", "PD13", "PD14", "PD15",
+				       "PD16", "PD17", "PD18", "PD19",
+				       "PD20", "PD21", "PD22", "PD23",
+				       "PD24", "PD25", "PD26", "PD27";
+				function = "lcd0";
+			};
+
+			/omit-if-no-ref/
+			lvds0_pins: lvds0-pins {
+				pins = "PD0", "PD1", "PD2", "PD3", "PD4",
+				       "PD5", "PD6", "PD7", "PD8", "PD9";
+				function = "lvds0";
+			};
+
+			/omit-if-no-ref/
+			lvds1_pins: lvds1-pins {
+				pins = "PD10", "PD11", "PD12", "PD13", "PD14",
+				       "PD15", "PD16", "PD17", "PD18", "PD19";
+				function = "lvds1";
+			};
+
 			mmc0_pins: mmc0-pins {
 				pins = "PF0", "PF1", "PF2", "PF3",
 				       "PF4", "PF5";
@@ -348,6 +374,12 @@ mmc2_pins: mmc2-pins {
 				bias-pull-up;
 			};
 
+			/omit-if-no-ref/
+			pwm0_pin: pwm0-pin {
+				pins = "PD28";
+				function = "pwm0";
+			};
+
 			/omit-if-no-ref/
 			spi0_pins: spi0-pins {
 				pins = "PC0", "PC2", "PC4";
-- 
2.48.1

Re: [PATCH 6/8] arm64: dts: allwinner: h616: add LCD, LVDS and PWM pins

[Jernej Škrabec]

Dne nedelja, 16. februar 2025 ob 10:27:13 Srednjeevropski standardni čas je Ryan Walklin napisal(a):
> From: Jernej Skrabec <jernej.skrabec@gmail.com>
> 
> The Allwinner H616 (and its H618, H700 and T507 package variants with
> the same die) have 28 video output pins for RGB/SPI and LVDS display.
> These are in GPIO Bank D and are multiplexed.
> 
> In RGB mode, pins PD0-PD23 are for 24-bit RGB pixel output, pins
> PD24-PD27 are for clock, DE, HSYNC and VSYNC, and PD28 is a PWM
> backlight control.
> 
> In LVDS mode, pins PD0-PD9 are for LVDS0 and LVDS1, and can be
> configured by the H616 display engine for either one high-resolution
> (dual link) or two low resolution displays.
> 
> Add device tree nodes for the LCD, LVDS0, LVDS1 and PWM pins.

Let's just drop PWM pins. PWM support is not yet implemented and it doesn't
fall into display themed patch anyway.

Best regards,
Jernej

> 
> Signed-off-by: Jernej Skrabec <jernej.skrabec@gmail.com>
> [ryan@testtoast.com: add RGB, LVDS1 and PWM pin assignments]
> Signed-off-by: Ryan Walklin <ryan@testtoast.com>
> ---
>  .../arm64/boot/dts/allwinner/sun50i-h616.dtsi | 32 +++++++++++++++++++
>  1 file changed, 32 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/allwinner/sun50i-h616.dtsi b/arch/arm64/boot/dts/allwinner/sun50i-h616.dtsi
> index 242bac95840f8..806ad87705abc 100644
> --- a/arch/arm64/boot/dts/allwinner/sun50i-h616.dtsi
> +++ b/arch/arm64/boot/dts/allwinner/sun50i-h616.dtsi
> @@ -322,6 +322,32 @@ ir_rx_pin: ir-rx-pin {
>  				function = "ir_rx";
>  			};
>  
> +			/omit-if-no-ref/
> +			lcd0_rgb888_pins: lcd0-rgb888-pins {
> +				pins = "PD0", "PD1", "PD2", "PD3",
> +				       "PD4", "PD5", "PD6", "PD7",
> +				       "PD8", "PD9", "PD10", "PD11",
> +				       "PD12", "PD13", "PD14", "PD15",
> +				       "PD16", "PD17", "PD18", "PD19",
> +				       "PD20", "PD21", "PD22", "PD23",
> +				       "PD24", "PD25", "PD26", "PD27";
> +				function = "lcd0";
> +			};
> +
> +			/omit-if-no-ref/
> +			lvds0_pins: lvds0-pins {
> +				pins = "PD0", "PD1", "PD2", "PD3", "PD4",
> +				       "PD5", "PD6", "PD7", "PD8", "PD9";
> +				function = "lvds0";
> +			};
> +
> +			/omit-if-no-ref/
> +			lvds1_pins: lvds1-pins {
> +				pins = "PD10", "PD11", "PD12", "PD13", "PD14",
> +				       "PD15", "PD16", "PD17", "PD18", "PD19";
> +				function = "lvds1";
> +			};
> +
>  			mmc0_pins: mmc0-pins {
>  				pins = "PF0", "PF1", "PF2", "PF3",
>  				       "PF4", "PF5";
> @@ -348,6 +374,12 @@ mmc2_pins: mmc2-pins {
>  				bias-pull-up;
>  			};
>  
> +			/omit-if-no-ref/
> +			pwm0_pin: pwm0-pin {
> +				pins = "PD28";
> +				function = "pwm0";
> +			};
> +
>  			/omit-if-no-ref/
>  			spi0_pins: spi0-pins {
>  				pins = "PC0", "PC2", "PC4";
> 

Re: [PATCH 6/8] arm64: dts: allwinner: h616: add LCD, LVDS and PWM pins

[Ryan Walklin]

On Sat, 22 Feb 2025, at 10:48 PM, Jernej Škrabec wrote:
> Dne nedelja, 16. februar 2025 ob 10:27:13 Srednjeevropski standardni 
> čas je Ryan Walklin napisal(a):
>> From: Jernej Skrabec <jernej.skrabec@gmail.com>
>> Add device tree nodes for the LCD, LVDS0, LVDS1 and PWM pins.
>
> Let's just drop PWM pins. PWM support is not yet implemented and it doesn't
> fall into display themed patch anyway.

That's fine, this can be re-added when the PWM driver is implemented, and will squash the backlight and panel nodes in the next patch.

Ryan

[PATCH 7/8] arm64: dts: allwinner: rg35xx: Enable LCD output

[Ryan Walklin]

The RG35XX has a 640x480 RGB/SPI LCD panel, supported by the SoC display
pipeline and an NV3052C controller. The H616 SOC's GPIO bank D contains
the muxed display pins for RGB and LVDS output support.

Enable the display engine and LCD timing controller, configure the
panel, and add a fixed 3.3v GPIO-controlled regulator for the panel, and
a VCC supply for the display pins as per the other GPIO banks.

Signed-off-by: Ryan Walklin <ryan@testtoast.com>
---
 .../sun50i-h700-anbernic-rg35xx-2024.dts      | 58 +++++++++++++++++++
 1 file changed, 58 insertions(+)

diff --git a/arch/arm64/boot/dts/allwinner/sun50i-h700-anbernic-rg35xx-2024.dts b/arch/arm64/boot/dts/allwinner/sun50i-h700-anbernic-rg35xx-2024.dts
index a231abf1684ad..388487d4720e2 100644
--- a/arch/arm64/boot/dts/allwinner/sun50i-h700-anbernic-rg35xx-2024.dts
+++ b/arch/arm64/boot/dts/allwinner/sun50i-h700-anbernic-rg35xx-2024.dts
@@ -175,6 +175,49 @@ reg_vcc5v: regulator-vcc5v { /* USB-C power input */
 		regulator-min-microvolt = <5000000>;
 		regulator-max-microvolt = <5000000>;
 	};
+
+	reg_lcd: regulator-gpio-lcd-vdd {
+		compatible = "regulator-fixed";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+		regulator-name = "vdd-lcd";
+		gpio = <&pio 8 15 GPIO_ACTIVE_HIGH>; // PI15
+		enable-active-high;
+	};
+
+	spi_lcd: spi {
+		compatible = "spi-gpio";
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		sck-gpios = <&pio 8 9 GPIO_ACTIVE_HIGH>; // PI9
+		mosi-gpios = <&pio 8 10 GPIO_ACTIVE_HIGH>; // PI10
+		cs-gpios = <&pio 8 8 GPIO_ACTIVE_HIGH>; // PI8
+		num-chipselects = <1>;
+
+		panel: panel@0 {
+			compatible = "anbernic,rg35xx-plus-panel";
+
+			reg = <0>;
+
+			spi-max-frequency = <3125000>;
+			spi-3wire;
+
+			reset-gpios = <&pio 8 14 GPIO_ACTIVE_LOW>; // PI14
+
+			backlight = <&backlight>;
+			power-supply = <&reg_lcd>;
+
+			pinctrl-0 = <&lcd0_rgb888_pins>;
+			pinctrl-names = "default";
+
+			port {
+				panel_in_rgb: endpoint {
+					remote-endpoint = <&tcon_lcd0_out_lcd>;
+				};
+			};
+		};
+	};
 };
 
 &codec {
@@ -187,6 +230,10 @@ &cpu0 {
 	cpu-supply = <&reg_dcdc1>;
 };
 
+&de {
+	status = "okay";
+};
+
 &ehci0 {
 	status = "okay";
 };
@@ -206,6 +253,7 @@ &ohci0 {
 &pio {
 	vcc-pa-supply = <&reg_cldo3>;
 	vcc-pc-supply = <&reg_cldo3>;
+	vcc-pd-supply = <&reg_cldo3>;
 	vcc-pe-supply = <&reg_cldo3>;
 	vcc-pf-supply = <&reg_cldo3>;
 	vcc-pg-supply = <&reg_aldo4>;
@@ -355,3 +403,13 @@ &usbotg {
 &usbphy {
 	status = "okay";
 };
+
+&tcon_lcd0 {
+	status = "okay";
+};
+
+&tcon_lcd0_out {
+	tcon_lcd0_out_lcd: endpoint@1 {
+		remote-endpoint = <&panel_in_rgb>;
+	};
+};
-- 
2.48.1

Re: [PATCH 7/8] arm64: dts: allwinner: rg35xx: Enable LCD output

[Jernej Škrabec]

Dne nedelja, 16. februar 2025 ob 10:27:14 Srednjeevropski standardni čas je Ryan Walklin napisal(a):
> The RG35XX has a 640x480 RGB/SPI LCD panel, supported by the SoC display
> pipeline and an NV3052C controller. The H616 SOC's GPIO bank D contains
> the muxed display pins for RGB and LVDS output support.
> 
> Enable the display engine and LCD timing controller, configure the
> panel, and add a fixed 3.3v GPIO-controlled regulator for the panel, and
> a VCC supply for the display pins as per the other GPIO banks.
> 
> Signed-off-by: Ryan Walklin <ryan@testtoast.com>
> ---
>  .../sun50i-h700-anbernic-rg35xx-2024.dts      | 58 +++++++++++++++++++
>  1 file changed, 58 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/allwinner/sun50i-h700-anbernic-rg35xx-2024.dts b/arch/arm64/boot/dts/allwinner/sun50i-h700-anbernic-rg35xx-2024.dts
> index a231abf1684ad..388487d4720e2 100644
> --- a/arch/arm64/boot/dts/allwinner/sun50i-h700-anbernic-rg35xx-2024.dts
> +++ b/arch/arm64/boot/dts/allwinner/sun50i-h700-anbernic-rg35xx-2024.dts
> @@ -175,6 +175,49 @@ reg_vcc5v: regulator-vcc5v { /* USB-C power input */
>  		regulator-min-microvolt = <5000000>;
>  		regulator-max-microvolt = <5000000>;
>  	};
> +
> +	reg_lcd: regulator-gpio-lcd-vdd {
> +		compatible = "regulator-fixed";
> +		regulator-min-microvolt = <3300000>;
> +		regulator-max-microvolt = <3300000>;
> +		regulator-name = "vdd-lcd";
> +		gpio = <&pio 8 15 GPIO_ACTIVE_HIGH>; // PI15
> +		enable-active-high;
> +	};
> +
> +	spi_lcd: spi {
> +		compatible = "spi-gpio";
> +		#address-cells = <1>;
> +		#size-cells = <0>;
> +
> +		sck-gpios = <&pio 8 9 GPIO_ACTIVE_HIGH>; // PI9
> +		mosi-gpios = <&pio 8 10 GPIO_ACTIVE_HIGH>; // PI10
> +		cs-gpios = <&pio 8 8 GPIO_ACTIVE_HIGH>; // PI8
> +		num-chipselects = <1>;
> +
> +		panel: panel@0 {
> +			compatible = "anbernic,rg35xx-plus-panel";
> +
> +			reg = <0>;
> +
> +			spi-max-frequency = <3125000>;
> +			spi-3wire;
> +
> +			reset-gpios = <&pio 8 14 GPIO_ACTIVE_LOW>; // PI14
> +
> +			backlight = <&backlight>;

There is no backlight node at this point. Reverse patches 7 and 8 or better yet,
merge them and put patch 8 message into comment to backlight node.

Best regards,
Jernej

> +			power-supply = <&reg_lcd>;
> +
> +			pinctrl-0 = <&lcd0_rgb888_pins>;
> +			pinctrl-names = "default";
> +
> +			port {
> +				panel_in_rgb: endpoint {
> +					remote-endpoint = <&tcon_lcd0_out_lcd>;
> +				};
> +			};
> +		};
> +	};
>  };
>  
>  &codec {
> @@ -187,6 +230,10 @@ &cpu0 {
>  	cpu-supply = <&reg_dcdc1>;
>  };
>  
> +&de {
> +	status = "okay";
> +};
> +
>  &ehci0 {
>  	status = "okay";
>  };
> @@ -206,6 +253,7 @@ &ohci0 {
>  &pio {
>  	vcc-pa-supply = <&reg_cldo3>;
>  	vcc-pc-supply = <&reg_cldo3>;
> +	vcc-pd-supply = <&reg_cldo3>;
>  	vcc-pe-supply = <&reg_cldo3>;
>  	vcc-pf-supply = <&reg_cldo3>;
>  	vcc-pg-supply = <&reg_aldo4>;
> @@ -355,3 +403,13 @@ &usbotg {
>  &usbphy {
>  	status = "okay";
>  };
> +
> +&tcon_lcd0 {
> +	status = "okay";
> +};
> +
> +&tcon_lcd0_out {
> +	tcon_lcd0_out_lcd: endpoint@1 {
> +		remote-endpoint = <&panel_in_rgb>;
> +	};
> +};
> 

[PATCH 8/8] arm64: dts: allwinner: rg35xx: Add GPIO backlight control

[Ryan Walklin]

The LCD backlight for this device can be exposed as a simple GPIO-
controlled device. It would be more accurately modelled using PWM to
enable brightness control, however the PWM driver design for the H616 is
not yet upstreamed.

Add a GPIO backlight node to the DTS.

Signed-off-by: Ryan Walklin <ryan@testtoast.com>
---
 .../boot/dts/allwinner/sun50i-h700-anbernic-rg35xx-2024.dts | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/arch/arm64/boot/dts/allwinner/sun50i-h700-anbernic-rg35xx-2024.dts b/arch/arm64/boot/dts/allwinner/sun50i-h700-anbernic-rg35xx-2024.dts
index 388487d4720e2..29d1144fc3987 100644
--- a/arch/arm64/boot/dts/allwinner/sun50i-h700-anbernic-rg35xx-2024.dts
+++ b/arch/arm64/boot/dts/allwinner/sun50i-h700-anbernic-rg35xx-2024.dts
@@ -21,6 +21,12 @@ aliases {
 		serial0 = &uart0;
 	};
 
+	backlight: backlight {
+		compatible = "gpio-backlight";
+		gpios = <&pio 3 28 GPIO_ACTIVE_HIGH>; // PD28
+		default-on;
+	};
+	
 	battery: battery {
 		compatible = "simple-battery";
 		constant-charge-current-max-microamp = <1024000>;
-- 
2.48.1

Re: [PATCH 8/8] arm64: dts: allwinner: rg35xx: Add GPIO backlight control

[Philippe Simons]

Tested on RG355XX-H

Tested-by: Philippe Simons <simons.philippe@gmail.com>

On 16/02/2025 10:27, Ryan Walklin wrote:
> The LCD backlight for this device can be exposed as a simple GPIO-
> controlled device. It would be more accurately modelled using PWM to
> enable brightness control, however the PWM driver design for the H616 is
> not yet upstreamed.
>
> Add a GPIO backlight node to the DTS.
>
> Signed-off-by: Ryan Walklin <ryan@testtoast.com>
> ---
>   .../boot/dts/allwinner/sun50i-h700-anbernic-rg35xx-2024.dts | 6 ++++++
>   1 file changed, 6 insertions(+)
>
> diff --git a/arch/arm64/boot/dts/allwinner/sun50i-h700-anbernic-rg35xx-2024.dts b/arch/arm64/boot/dts/allwinner/sun50i-h700-anbernic-rg35xx-2024.dts
> index 388487d4720e2..29d1144fc3987 100644
> --- a/arch/arm64/boot/dts/allwinner/sun50i-h700-anbernic-rg35xx-2024.dts
> +++ b/arch/arm64/boot/dts/allwinner/sun50i-h700-anbernic-rg35xx-2024.dts
> @@ -21,6 +21,12 @@ aliases {
>   		serial0 = &uart0;
>   	};
>   
> +	backlight: backlight {
> +		compatible = "gpio-backlight";
> +		gpios = <&pio 3 28 GPIO_ACTIVE_HIGH>; // PD28
> +		default-on;
> +	};
> +	
>   	battery: battery {
>   		compatible = "simple-battery";
>   		constant-charge-current-max-microamp = <1024000>;