[PATCH v2 09/12] arm64: dts: allwinner: h616: add display engine, bus and mixer nodes

[Ryan Walklin]

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 [1]. 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 at gmail.com>
Signed-off-by: Ryan Walklin <ryan at testtoast.com>

[1] https://lore.kernel.org/linux-sunxi/20250528092431.28825-1-ryan@testtoast.com

--
Changelog v1..v2:
- Use A64 fallback for bus driver rather than add additional compatible in driver, enum added to dt-binding in previous patch.
- amend order of display clocks (bus/mod) to match dt binding.
- add mixer register names.
- removed IOMMU binding due to late binding warning likely reflecting sunxi IOMMU driver bug. This is not required for RGB LCD output.
- use H616 compatibles
- Update SRAM name to DE33
---
 .../arm64/boot/dts/allwinner/sun50i-h616.dtsi | 58 +++++++++++++++++++
 1 file changed, 58 insertions(+)

diff --git a/arch/arm64/boot/dts/allwinner/sun50i-h616.dtsi b/arch/arm64/boot/dts/allwinner/sun50i-h616.dtsi
index ceedae9e399b..7347332f54a7 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-h616-display-engine";
+		allwinner,pipelines = <&mixer0>;
+		status = "disabled";
+	};
+
 	reserved-memory {
 		#address-cells = <2>;
 		#size-cells = <2>;
@@ -150,6 +156,52 @@ soc {
 		#size-cells = <1>;
 		ranges = <0x0 0x0 0x0 0x40000000>;
 
+		bus: bus at 1000000 {
+			compatible = "allwinner,sun50i-h616-de33",
+				     "allwinner,sun50i-a64-de2";
+			reg = <0x1000000 0x400000>;
+			allwinner,sram = <&de33_sram 1>;
+			#address-cells = <1>;
+			#size-cells = <1>;
+			ranges = <0 0x1000000 0x400000>;
+
+			display_clocks: clock at 8000 {
+				compatible = "allwinner,sun50i-h616-de33-clk";
+				reg = <0x8000 0x100>;
+				clocks = <&ccu CLK_BUS_DE>,
+					 <&ccu CLK_DE>;
+				clock-names = "bus", "mod";
+				resets = <&ccu RST_BUS_DE>;
+				#clock-cells = <1>;
+				#reset-cells = <1>;
+			};
+
+			mixer0: mixer at 100000 {
+				compatible = "allwinner,sun50i-h616-de33-mixer-0";
+				reg = <0x100000 0x100000>,
+				      <0x8100 0x40>,
+				      <0x280000 0x20000>;
+				reg-names = "layers", "top", "display";
+				clocks = <&display_clocks CLK_BUS_MIXER0>,
+					 <&display_clocks CLK_MIXER0>;
+				clock-names = "bus", "mod";
+				resets = <&display_clocks RST_MIXER0>;
+
+				ports {
+					#address-cells = <1>;
+					#size-cells = <0>;
+
+					mixer0_out: port at 1 {
+						reg = <1>;
+
+						mixer0_out_tcon_top: endpoint {
+							remote-endpoint = <&tcon_top_mixer0_in_mixer0>;
+						};
+					};
+				};
+			};
+		};
+
 		gpu: gpu at 1800000 {
 			compatible = "allwinner,sun50i-h616-mali",
 				     "arm,mali-bifrost";
@@ -188,6 +240,12 @@ sram_c: sram at 28000 {
 				#address-cells = <1>;
 				#size-cells = <1>;
 				ranges = <0 0x00028000 0x30000>;
+
+				de33_sram: sram-section at 0 {
+					compatible = "sun50i-h616-sram-c",
+						     "allwinner,sun50i-a64-sram-c";
+					reg = <0x0000 0x1e000>;
+				};
 			};
 		};
 
-- 
2.50.1