linux-kernel - [PATCH v13 35/35] ARM: tegra20/30: Disable unused host1x hardware

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Date:   Mon, 27 Sep 2021 01:40:58 +0300
From:   Dmitry Osipenko <digetx@...il.com>
To:     Thierry Reding <thierry.reding@...il.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        Ulf Hansson <ulf.hansson@...aro.org>,
        Viresh Kumar <vireshk@...nel.org>,
        Stephen Boyd <sboyd@...nel.org>,
        Peter De Schrijver <pdeschrijver@...dia.com>,
        Mikko Perttunen <mperttunen@...dia.com>,
        Peter Chen <peter.chen@...nel.org>,
        Lee Jones <lee.jones@...aro.org>,
        Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>, Nishanth Menon <nm@...com>,
        Adrian Hunter <adrian.hunter@...el.com>,
        Michael Turquette <mturquette@...libre.com>
Cc:     linux-kernel@...r.kernel.org, linux-tegra@...r.kernel.org,
        linux-pm@...r.kernel.org, linux-usb@...r.kernel.org,
        linux-staging@...ts.linux.dev, linux-pwm@...r.kernel.org,
        linux-mmc@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        devicetree@...r.kernel.org, linux-clk@...r.kernel.org,
        Mark Brown <broonie@...nel.org>,
        Vignesh Raghavendra <vigneshr@...com>,
        Richard Weinberger <richard@....at>,
        Miquel Raynal <miquel.raynal@...tlin.com>,
        Lucas Stach <dev@...xeye.de>, Stefan Agner <stefan@...er.ch>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        David Heidelberg <david@...t.cz>
Subject: [PATCH v13 35/35] ARM: tegra20/30: Disable unused host1x hardware

MPE, VI, EPP and ISP were never used and we don't have drivers for them.
Since these modules are enabled by default in a device-tree, a device is
created for them, blocking voltage scaling because there is no driver to
bind, and thus, state of PMC driver is never synced. Disable them.

Signed-off-by: Dmitry Osipenko <digetx@...il.com>
---
 arch/arm/boot/dts/tegra20.dtsi | 4 ++++
 arch/arm/boot/dts/tegra30.dtsi | 8 ++++++++
 2 files changed, 12 insertions(+)

diff --git a/arch/arm/boot/dts/tegra20.dtsi b/arch/arm/boot/dts/tegra20.dtsi
index eb6e5518fb5f..05788c9cddc1 100644
--- a/arch/arm/boot/dts/tegra20.dtsi
+++ b/arch/arm/boot/dts/tegra20.dtsi
@@ -59,6 +59,7 @@ mpe@...40000 {
 			reset-names = "mpe";
 			operating-points-v2 = <&mpe_dvfs_opp_table>;
 			power-domains = <&pd_mpe>;
+			status = "disabled";
 		};
 
 		vi@...80000 {
@@ -70,6 +71,7 @@ vi@...80000 {
 			reset-names = "vi";
 			operating-points-v2 = <&vi_dvfs_opp_table>;
 			power-domains = <&pd_venc>;
+			status = "disabled";
 		};
 
 		epp@...c0000 {
@@ -81,6 +83,7 @@ epp@...c0000 {
 			reset-names = "epp";
 			operating-points-v2 = <&epp_dvfs_opp_table>;
 			power-domains = <&pd_core>;
+			status = "disabled";
 		};
 
 		isp@...00000 {
@@ -91,6 +94,7 @@ isp@...00000 {
 			resets = <&tegra_car 23>;
 			reset-names = "isp";
 			power-domains = <&pd_venc>;
+			status = "disabled";
 		};
 
 		gr2d@...40000 {
diff --git a/arch/arm/boot/dts/tegra30.dtsi b/arch/arm/boot/dts/tegra30.dtsi
index 09cb1ab75312..f9613384a487 100644
--- a/arch/arm/boot/dts/tegra30.dtsi
+++ b/arch/arm/boot/dts/tegra30.dtsi
@@ -145,6 +145,8 @@ mpe@...40000 {
 			power-domains = <&pd_mpe>;
 
 			iommus = <&mc TEGRA_SWGROUP_MPE>;
+
+			status = "disabled";
 		};
 
 		vi@...80000 {
@@ -158,6 +160,8 @@ vi@...80000 {
 			power-domains = <&pd_venc>;
 
 			iommus = <&mc TEGRA_SWGROUP_VI>;
+
+			status = "disabled";
 		};
 
 		epp@...c0000 {
@@ -171,6 +175,8 @@ epp@...c0000 {
 			power-domains = <&pd_heg>;
 
 			iommus = <&mc TEGRA_SWGROUP_EPP>;
+
+			status = "disabled";
 		};
 
 		isp@...00000 {
@@ -183,6 +189,8 @@ isp@...00000 {
 			power-domains = <&pd_venc>;
 
 			iommus = <&mc TEGRA_SWGROUP_ISP>;
+
+			status = "disabled";
 		};
 
 		gr2d@...40000 {
-- 
2.32.0