linux-kernel - [PATCH AUTOSEL 5.8 121/132] ARM: dts: omap4: Fix sgx clock rate for 4430

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Message-Id: <20201026235205.1023962-121-sashal@kernel.org>
Date:   Mon, 26 Oct 2020 19:51:53 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Tony Lindgren <tony@...mide.com>,
        Arthur Demchenkov <spinal.by@...il.com>,
        Merlijn Wajer <merlijn@...zup.org>,
        Sebastian Reichel <sre@...nel.org>,
        Sasha Levin <sashal@...nel.org>, linux-omap@...r.kernel.org,
        devicetree@...r.kernel.org
Subject: [PATCH AUTOSEL 5.8 121/132] ARM: dts: omap4: Fix sgx clock rate for 4430

From: Tony Lindgren <tony@...mide.com>

[ Upstream commit 19d3e9a0bdd57b90175f30390edeb06851f5f9f3 ]

We currently have a different clock rate for droid4 compared to the
stock v3.0.8 based Android Linux kernel:

# cat /sys/kernel/debug/clk/dpll_*_m7x2_ck/clk_rate
266666667
307200000
# cat /sys/kernel/debug/clk/l3_gfx_cm:clk:0000:0/clk_rate
307200000

Let's fix this by configuring sgx to use 153.6 MHz instead of 307.2 MHz.
Looks like also at least duover needs this change to avoid hangs, so
let's apply it for all 4430.

This helps a bit with thermal issues that seem to be related to memory
corruption when using sgx. It seems that other driver related issues
still remain though.

Cc: Arthur Demchenkov <spinal.by@...il.com>
Cc: Merlijn Wajer <merlijn@...zup.org>
Cc: Sebastian Reichel <sre@...nel.org>
Signed-off-by: Tony Lindgren <tony@...mide.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 arch/arm/boot/dts/omap4.dtsi    |  2 +-
 arch/arm/boot/dts/omap443x.dtsi | 10 ++++++++++
 2 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/arch/arm/boot/dts/omap4.dtsi b/arch/arm/boot/dts/omap4.dtsi
index 4400f5f8e0992..a70c50edd764b 100644
--- a/arch/arm/boot/dts/omap4.dtsi
+++ b/arch/arm/boot/dts/omap4.dtsi
@@ -389,7 +389,7 @@ abb_iva: regulator-abb-iva {
 			status = "disabled";
 		};
 
-		target-module@...00000 {
+		sgx_module: target-module@...00000 {
 			compatible = "ti,sysc-omap4", "ti,sysc";
 			reg = <0x5600fe00 0x4>,
 			      <0x5600fe10 0x4>;
diff --git a/arch/arm/boot/dts/omap443x.dtsi b/arch/arm/boot/dts/omap443x.dtsi
index cbcdcb4e7d1c2..86b9caf461dfa 100644
--- a/arch/arm/boot/dts/omap443x.dtsi
+++ b/arch/arm/boot/dts/omap443x.dtsi
@@ -74,3 +74,13 @@ &cpu_thermal {
 };
 
 /include/ "omap443x-clocks.dtsi"
+
+/*
+ * Use dpll_per for sgx at 153.6MHz like droid4 stock v3.0.8 Android kernel
+ */
+&sgx_module {
+	assigned-clocks = <&l3_gfx_clkctrl OMAP4_GPU_CLKCTRL 24>,
+			  <&dpll_per_m7x2_ck>;
+	assigned-clock-rates = <0>, <153600000>;
+	assigned-clock-parents = <&dpll_per_m7x2_ck>;
+};
-- 
2.25.1