linux-kernel - [PATCH v4 7/8] riscv: dts: thead: th1520: Add IMG BXM-4-64 GPU node

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Message-Id: <20250614-apr_14_for_sending-v4-7-8e3945c819cd@samsung.com>
Date: Sat, 14 Jun 2025 20:06:13 +0200
From: Michal Wilczynski <m.wilczynski@...sung.com>
To: Drew Fustini <drew@...7.com>, Guo Ren <guoren@...nel.org>,  Fu Wei
	<wefu@...hat.com>, Rob Herring <robh@...nel.org>,  Krzysztof Kozlowski
	<krzk+dt@...nel.org>,  Conor Dooley <conor+dt@...nel.org>,  Michal
	Wilczynski <m.wilczynski@...sung.com>,  Bartosz Golaszewski <brgl@...ev.pl>,
	Philipp Zabel <p.zabel@...gutronix.de>,  Frank Binns
	<frank.binns@...tec.com>, Matt Coster <matt.coster@...tec.com>,  Maarten
	Lankhorst <maarten.lankhorst@...ux.intel.com>,  Maxime Ripard
	<mripard@...nel.org>, Thomas Zimmermann <tzimmermann@...e.de>,  David Airlie
	<airlied@...il.com>, Simona Vetter <simona@...ll.ch>,  Paul Walmsley
	<paul.walmsley@...ive.com>,  Palmer Dabbelt <palmer@...belt.com>, Albert Ou
	<aou@...s.berkeley.edu>,  Alexandre Ghiti <alex@...ti.fr>, Ulf Hansson
	<ulf.hansson@...aro.org>,  Marek Szyprowski <m.szyprowski@...sung.com>
Cc: linux-riscv@...ts.infradead.org, devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org, 
	dri-devel@...ts.freedesktop.org
Subject: [PATCH v4 7/8] riscv: dts: thead: th1520: Add IMG BXM-4-64 GPU node

Add a device tree node for the IMG BXM-4-64 GPU present in the T-HEAD
TH1520 SoC used by the Lichee Pi 4A board. This node enables support for
the GPU using the drm/imagination driver.

By adding this node, the kernel can recognize and initialize the GPU,
providing graphics acceleration capabilities on the Lichee Pi 4A and
other boards based on the TH1520 SoC.

Add fixed clock gpu_mem_clk, as the MEM clock on the T-HEAD SoC can't be
controlled programatically.

Reviewed-by: Ulf Hansson <ulf.hansson@...aro.org>
Signed-off-by: Michal Wilczynski <m.wilczynski@...sung.com>
---
 arch/riscv/boot/dts/thead/th1520.dtsi | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/arch/riscv/boot/dts/thead/th1520.dtsi b/arch/riscv/boot/dts/thead/th1520.dtsi
index f3f5db0201ab8c0306d4d63072a1573431e51893..c8447eef36c3a6e92d768658b6b19dfeb59a47c4 100644
--- a/arch/riscv/boot/dts/thead/th1520.dtsi
+++ b/arch/riscv/boot/dts/thead/th1520.dtsi
@@ -225,6 +225,13 @@ aonsys_clk: clock-73728000 {
 		#clock-cells = <0>;
 	};
 
+	gpu_mem_clk: mem-clk {
+		compatible = "fixed-clock";
+		clock-frequency = <0>;
+		clock-output-names = "gpu_mem_clk";
+		#clock-cells = <0>;
+	};
+
 	stmmac_axi_config: stmmac-axi-config {
 		snps,wr_osr_lmt = <15>;
 		snps,rd_osr_lmt = <15>;
@@ -500,6 +507,21 @@ clk: clock-controller@...f010000 {
 			#clock-cells = <1>;
 		};
 
+		gpu: gpu@...f400000 {
+			compatible = "thead,th1520-gpu", "img,img-bxm-4-64",
+				     "img,img-rogue";
+			reg = <0xff 0xef400000 0x0 0x100000>;
+			interrupt-parent = <&plic>;
+			interrupts = <102 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&clk_vo CLK_GPU_CORE>,
+				 <&gpu_mem_clk>,
+				 <&clk_vo CLK_GPU_CFG_ACLK>;
+			clock-names = "core", "mem", "sys";
+			power-domains = <&aon TH1520_GPU_PD>;
+			power-domain-names = "a";
+			resets = <&rst TH1520_RESET_ID_GPU>;
+		};
+
 		rst: reset-controller@...f528000 {
 			compatible = "thead,th1520-reset";
 			reg = <0xff 0xef528000 0x0 0x4f>;

-- 
2.34.1