[PATCH v4 3/4] arm64: dts: rockchip: Add device tree support for HDMI RX Controller

[Shreeya Patel <shreeya.patel@collabora.com>]

Add device tree support for Synopsys DesignWare HDMI RX
Controller.

Reviewed-by: Dmitry Osipenko <dmitry.osipenko@collabora.com>
Tested-by: Dmitry Osipenko <dmitry.osipenko@collabora.com>
Co-developed-by: Dingxian Wen <shawn.wen@rock-chips.com>
Signed-off-by: Dingxian Wen <shawn.wen@rock-chips.com>
Signed-off-by: Shreeya Patel <shreeya.patel@collabora.com>
---

Changes in v4 :-
  - Remove DTS changes added to this patch
  - Remove the HDMI RX pin nodes as it's already present
    in the rk3588-base-pinctrl.dtsi

Changes in v3 :-
  - Rename cma node and phandle names
  - Elaborate the comment to explain 160MiB calculation
  - Move &hdmi_receiver_cma to the rock5b dts file

Changes in v2 :-
  - Fix some of the checkpatch errors and warnings
  - Rename resets, vo1-grf and HPD
  - Move hdmirx_cma node to the rk3588.dtsi file

 .../dts/rockchip/rk3588-base-pinctrl.dtsi     | 14 +++++
 .../arm64/boot/dts/rockchip/rk3588-extra.dtsi | 56 +++++++++++++++++++
 2 files changed, 70 insertions(+)

diff --git a/arch/arm64/boot/dts/rockchip/rk3588-base-pinctrl.dtsi b/arch/arm64/boot/dts/rockchip/rk3588-base-pinctrl.dtsi
index 30db12c4fc82..ca006f5a4c90 100644
--- a/arch/arm64/boot/dts/rockchip/rk3588-base-pinctrl.dtsi
+++ b/arch/arm64/boot/dts/rockchip/rk3588-base-pinctrl.dtsi
@@ -594,6 +594,20 @@ hdmim0_tx1_hpd: hdmim0-tx1-hpd {
 				/* hdmim0_tx1_hpd */
 				<1 RK_PA6 5 &pcfg_pull_none>;
 		};
+
+		/omit-if-no-ref/
+		hdmim1_rx: hdmim1-rx {
+			rockchip,pins =
+				/* hdmim1_rx_cec */
+				<3 RK_PD1 5 &pcfg_pull_none>,
+				/* hdmim1_rx_scl */
+				<3 RK_PD2 5 &pcfg_pull_none_smt>,
+				/* hdmim1_rx_sda */
+				<3 RK_PD3 5 &pcfg_pull_none_smt>,
+				/* hdmim1_rx_hpdin */
+				<3 RK_PD4 5 &pcfg_pull_none>;
+		};
+
 		/omit-if-no-ref/
 		hdmim1_rx_cec: hdmim1-rx-cec {
 			rockchip,pins =
diff --git a/arch/arm64/boot/dts/rockchip/rk3588-extra.dtsi b/arch/arm64/boot/dts/rockchip/rk3588-extra.dtsi
index 0ce0934ec6b7..96f8ce91eaf4 100644
--- a/arch/arm64/boot/dts/rockchip/rk3588-extra.dtsi
+++ b/arch/arm64/boot/dts/rockchip/rk3588-extra.dtsi
@@ -7,6 +7,29 @@
 #include "rk3588-extra-pinctrl.dtsi"
 
 / {
+	reserved-memory {
+		#address-cells = <2>;
+		#size-cells = <2>;
+		ranges;
+
+		/*
+		 * The 4k HDMI capture controller works only with 32bit
+		 * phys addresses and doesn't support IOMMU. HDMI RX CMA
+		 * must be reserved below 4GB.
+		 * The size of 160MB was determined as follows:
+		 * (3840 * 2160 pixels) * (4 bytes/pixel) * (2 frames/buffer) / 10^6 = 66MB
+		 * To ensure sufficient support for practical use-cases,
+		 * we doubled the 66MB value.
+		 */
+		hdmi_receiver_cma: hdmi-receiver-cma {
+			compatible = "shared-dma-pool";
+			alloc-ranges = <0x0 0x0 0x0 0xffffffff>;
+			size = <0x0 (160 * 0x100000)>; /* 160MiB */
+			no-map;
+			status = "disabled";
+		};
+	};
+
 	usb_host1_xhci: usb@fc400000 {
 		compatible = "rockchip,rk3588-dwc3", "snps,dwc3";
 		reg = <0x0 0xfc400000 0x0 0x400000>;
@@ -135,6 +158,39 @@ i2s10_8ch: i2s@fde00000 {
 		status = "disabled";
 	};
 
+	hdmi_receiver: hdmi_receiver@fdee0000 {
+		compatible = "rockchip,rk3588-hdmirx-ctrler", "snps,dw-hdmi-rx";
+		reg = <0x0 0xfdee0000 0x0 0x6000>;
+		power-domains = <&power RK3588_PD_VO1>;
+		rockchip,grf = <&sys_grf>;
+		rockchip,vo1-grf = <&vo1_grf>;
+		interrupts = <GIC_SPI 177 IRQ_TYPE_LEVEL_HIGH 0>,
+			     <GIC_SPI 436 IRQ_TYPE_LEVEL_HIGH 0>,
+			     <GIC_SPI 179 IRQ_TYPE_LEVEL_HIGH 0>;
+		interrupt-names = "cec", "hdmi", "dma";
+		clocks = <&cru ACLK_HDMIRX>,
+			 <&cru CLK_HDMIRX_AUD>,
+			 <&cru CLK_CR_PARA>,
+			 <&cru PCLK_HDMIRX>,
+			 <&cru CLK_HDMIRX_REF>,
+			 <&cru PCLK_S_HDMIRX>,
+			 <&cru HCLK_VO1>;
+		clock-names = "aclk",
+			      "audio",
+			      "cr_para",
+			      "pclk",
+			      "ref",
+			      "hclk_s_hdmirx",
+			      "hclk_vo1";
+		resets = <&cru SRST_A_HDMIRX>, <&cru SRST_P_HDMIRX>,
+			 <&cru SRST_HDMIRX_REF>, <&cru SRST_A_HDMIRX_BIU>;
+		reset-names = "axi", "apb", "ref", "biu";
+		memory-region = <&hdmi_receiver_cma>;
+		pinctrl-0 = <&hdmim1_rx>;
+		pinctrl-names = "default";
+		status = "disabled";
+	};
+
 	pcie3x4: pcie@fe150000 {
 		compatible = "rockchip,rk3588-pcie", "rockchip,rk3568-pcie";
 		#address-cells = <3>;
-- 
2.39.2