[PATCH v4 4/4] arm64: dts: rockchip: rk356x: Add JPEG decoder node

[Sascha Hauer <s.hauer@pengutronix.de>]

Add device tree nodes for the Rockchip JPEG hardware decoder and its
IOMMU on the RK356x.

The decoder is the same block as on the RK3588, here at 0xfded0000 with
its MMU at 0xfded0480 and the same 0x400 register window.  Only the
integration differs: ACLK_JDEC and HCLK_JDEC instead of the JPEG decoder
clocks, SRST_A_JDEC and SRST_H_JDEC for the AXI and AHB resets, and the
RGA power domain rather than VDPU.

No rate is assigned to the AXI clock here.  Unlike on the RK3588 it is a
gate off aclk_rga_pre, shared with the RGA, the IEP and the EBC, so a
rate set for the decoder would move those too.  Its mux tops out at
300 MHz, close to the 297 MHz the downstream BSP asks for, and the vepu
node on the same clock tree already leaves it alone.

The domain needs nothing else, it already lists qos_jpeg_dec.

Both blocks are entirely on-SoC and have no board dependency, so they are
enabled unconditionally like the other codec blocks in this file.

Assisted-by: Claude:claude-opus-5
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
 arch/arm64/boot/dts/rockchip/rk356x-base.dtsi | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/arch/arm64/boot/dts/rockchip/rk356x-base.dtsi b/arch/arm64/boot/dts/rockchip/rk356x-base.dtsi
index a5832895bd392..e6c7ae908a99f 100644
--- a/arch/arm64/boot/dts/rockchip/rk356x-base.dtsi
+++ b/arch/arm64/boot/dts/rockchip/rk356x-base.dtsi
@@ -619,6 +619,28 @@ rga: rga@fdeb0000 {
 		power-domains = <&power RK3568_PD_RGA>;
 	};
 
+	jpegd: video-codec@fded0000 {
+		compatible = "rockchip,rk3568-jpegd";
+		reg = <0x0 0xfded0000 0x0 0x400>;
+		interrupts = <GIC_SPI 62 IRQ_TYPE_LEVEL_HIGH>;
+		clocks = <&cru ACLK_JDEC>, <&cru HCLK_JDEC>;
+		clock-names = "axi", "ahb";
+		resets = <&cru SRST_A_JDEC>, <&cru SRST_H_JDEC>;
+		reset-names = "axi", "ahb";
+		iommus = <&jpegd_mmu>;
+		power-domains = <&power RK3568_PD_RGA>;
+	};
+
+	jpegd_mmu: iommu@fded0480 {
+		compatible = "rockchip,rk3568-iommu";
+		reg = <0x0 0xfded0480 0x0 0x40>;
+		interrupts = <GIC_SPI 61 IRQ_TYPE_LEVEL_HIGH>;
+		clocks = <&cru ACLK_JDEC>, <&cru HCLK_JDEC>;
+		clock-names = "aclk", "iface";
+		power-domains = <&power RK3568_PD_RGA>;
+		#iommu-cells = <0>;
+	};
+
 	vepu: video-codec@fdee0000 {
 		compatible = "rockchip,rk3568-vepu";
 		reg = <0x0 0xfdee0000 0x0 0x800>;

-- 
2.47.3