| From 96f5afa1159fa456b2ab497e300fce9ca96408a5 Mon Sep 17 00:00:00 2001 |
| From: Sasha Levin <sashal@kernel.org> |
| Date: Tue, 10 Mar 2020 14:02:48 -0700 |
| Subject: ARM: dts: omap4: Fix sgx clock rate for 4430 |
| |
| From: Tony Lindgren <tony@atomide.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@gmail.com> |
| Cc: Merlijn Wajer <merlijn@wizzup.org> |
| Cc: Sebastian Reichel <sre@kernel.org> |
| Signed-off-by: Tony Lindgren <tony@atomide.com> |
| Signed-off-by: Sasha Levin <sashal@kernel.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 0282b9de3384f..52e8298275050 100644 |
| --- a/arch/arm/boot/dts/omap4.dtsi |
| +++ b/arch/arm/boot/dts/omap4.dtsi |
| @@ -410,7 +410,7 @@ |
| status = "disabled"; |
| }; |
| |
| - target-module@56000000 { |
| + sgx_module: target-module@56000000 { |
| 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 8ed510ab00c52..cb309743de5da 100644 |
| --- a/arch/arm/boot/dts/omap443x.dtsi |
| +++ b/arch/arm/boot/dts/omap443x.dtsi |
| @@ -74,3 +74,13 @@ |
| }; |
| |
| /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>; |
| +}; |
| -- |
| 2.27.0 |
| |