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From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Martin Blumenstingl <martin.blumenstingl@googlemail.com>,
	Kevin Hilman <khilman@baylibre.com>,
	Sasha Levin <sashal@kernel.org>,
	devicetree@vger.kernel.org, linux-amlogic@lists.infradead.org
Subject: [PATCH AUTOSEL 5.1 02/39] ARM: dts: meson8b: fix the operating voltage of the Mali GPU
Date: Tue,  2 Jul 2019 22:14:37 -0400	[thread overview]
Message-ID: <20190703021514.17727-2-sashal@kernel.org> (raw)
In-Reply-To: <20190703021514.17727-1-sashal@kernel.org>

From: Martin Blumenstingl <martin.blumenstingl@googlemail.com>

[ Upstream commit 26d65140e92a626e39c73c9abf769fd174bf5076 ]

Amlogic's vendor kernel defines an OPP for the GPU on Meson8b boards
with a voltage of 1.15V. It turns out that the vendor kernel relies on
the bootloader to set up the voltage. The bootloader however sets a
fixed voltage of 1.10V.

Amlogic's patched u-boot sources (uboot-2015-01-15-23a3562521) confirm
this:
$ grep -oiE "VDD(EE|AO)_VOLTAGE[ ]+[0-9]+" board/amlogic/configs/m8b_*
  board/amlogic/configs/m8b_m100_v1.h:VDDAO_VOLTAGE            1100
  board/amlogic/configs/m8b_m101_v1.h:VDDAO_VOLTAGE            1100
  board/amlogic/configs/m8b_m102_v1.h:VDDAO_VOLTAGE            1100
  board/amlogic/configs/m8b_m200_v1.h:VDDAO_VOLTAGE            1100
  board/amlogic/configs/m8b_m201_v1.h:VDDEE_VOLTAGE            1100
  board/amlogic/configs/m8b_m201_v1.h:VDDEE_VOLTAGE            1100
  board/amlogic/configs/m8b_m202_v1.h:VDDEE_VOLTAGE            1100

Another hint at this is the VDDEE voltage on the EC-100 and Odroid-C1
boards. The VDDEE regulator supplies the Mali GPU. It's basically a copy
of the VCCK (CPU supply) which means it's limited to 0.86V to 1.14V.

Update the operating voltage of the Mali GPU on Meson8b to 1.10V so it
matches with what the vendor u-boot sets.

Fixes: c3ea80b6138cae ("ARM: dts: meson8b: add the Mali-450 MP2 GPU")
Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: Kevin Hilman <khilman@baylibre.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 arch/arm/boot/dts/meson8b.dtsi | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/arch/arm/boot/dts/meson8b.dtsi b/arch/arm/boot/dts/meson8b.dtsi
index fe84a8c3ce81..6b80aff32fc2 100644
--- a/arch/arm/boot/dts/meson8b.dtsi
+++ b/arch/arm/boot/dts/meson8b.dtsi
@@ -163,23 +163,23 @@
 
 		opp-255000000 {
 			opp-hz = /bits/ 64 <255000000>;
-			opp-microvolt = <1150000>;
+			opp-microvolt = <1100000>;
 		};
 		opp-364300000 {
 			opp-hz = /bits/ 64 <364300000>;
-			opp-microvolt = <1150000>;
+			opp-microvolt = <1100000>;
 		};
 		opp-425000000 {
 			opp-hz = /bits/ 64 <425000000>;
-			opp-microvolt = <1150000>;
+			opp-microvolt = <1100000>;
 		};
 		opp-510000000 {
 			opp-hz = /bits/ 64 <510000000>;
-			opp-microvolt = <1150000>;
+			opp-microvolt = <1100000>;
 		};
 		opp-637500000 {
 			opp-hz = /bits/ 64 <637500000>;
-			opp-microvolt = <1150000>;
+			opp-microvolt = <1100000>;
 			turbo-mode;
 		};
 	};
-- 
2.20.1


  reply	other threads:[~2019-07-03  2:15 UTC|newest]

Thread overview: 41+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-07-03  2:14 [PATCH AUTOSEL 5.1 01/39] ARM: dts: meson8: fix GPU interrupts and drop an undocumented property Sasha Levin
2019-07-03  2:14 ` Sasha Levin [this message]
2019-07-03  2:14 ` [PATCH AUTOSEL 5.1 03/39] idr: Fix idr_get_next race with idr_remove Sasha Levin
2019-07-03  2:14 ` [PATCH AUTOSEL 5.1 04/39] irqchip/irq-csky-mpintc: Support auto irq deliver to all cpus Sasha Levin
2019-07-03  2:14 ` [PATCH AUTOSEL 5.1 05/39] irqchip/gic-v3-its: Fix command queue pointer comparison bug Sasha Levin
2019-07-03  2:14 ` [PATCH AUTOSEL 5.1 06/39] clk: ti: clkctrl: Fix returning uninitialized data Sasha Levin
2019-07-03  2:14 ` [PATCH AUTOSEL 5.1 07/39] efi/bgrt: Drop BGRT status field reserved bits check Sasha Levin
2019-07-03  2:14 ` [PATCH AUTOSEL 5.1 08/39] arm64: dts: ls1028a: Fix CPU idle fail Sasha Levin
2019-07-11  5:04   ` Ran Wang
2019-07-11  6:43     ` Greg KH
2019-07-03  2:14 ` [PATCH AUTOSEL 5.1 09/39] selftests/powerpc: Add test of fork with mapping above 512TB Sasha Levin
2019-07-03  2:14 ` [PATCH AUTOSEL 5.1 10/39] perf/core: Fix perf_sample_regs_user() mm check Sasha Levin
2019-07-03  2:14 ` [PATCH AUTOSEL 5.1 11/39] ARM: dts: gemini Fix up DNS-313 compatible string Sasha Levin
2019-07-03  2:14 ` [PATCH AUTOSEL 5.1 12/39] ARM: omap2: remove incorrect __init annotation Sasha Levin
2019-07-03  2:14 ` [PATCH AUTOSEL 5.1 13/39] afs: Fix uninitialised spinlock afs_volume::cb_break_lock Sasha Levin
2019-07-03  2:14 ` [PATCH AUTOSEL 5.1 14/39] x86/efi: fix a -Wtype-limits compilation warning Sasha Levin
2019-07-03  2:14 ` [PATCH AUTOSEL 5.1 15/39] x86/apic: Fix integer overflow on 10 bit left shift of cpu_khz Sasha Levin
2019-07-03  2:14 ` [PATCH AUTOSEL 5.1 16/39] be2net: fix link failure after ethtool offline test Sasha Levin
2019-07-03  2:14 ` [PATCH AUTOSEL 5.1 17/39] ppp: mppe: Add softdep to arc4 Sasha Levin
2019-07-03  2:14 ` [PATCH AUTOSEL 5.1 18/39] net: stmmac: fixed new system time seconds value calculation Sasha Levin
2019-07-03  2:14 ` [PATCH AUTOSEL 5.1 19/39] net: stmmac: set IC bit when transmitting frames with HW timestamp Sasha Levin
2019-07-03  2:14 ` [PATCH AUTOSEL 5.1 20/39] sis900: fix TX completion Sasha Levin
2019-07-03  2:14 ` [PATCH AUTOSEL 5.1 21/39] ARM: dts: imx6ul: fix PWM[1-4] interrupts Sasha Levin
2019-07-03  2:14 ` [PATCH AUTOSEL 5.1 22/39] qmi_wwan: Fix out-of-bounds read Sasha Levin
2019-07-03  2:14 ` [PATCH AUTOSEL 5.1 23/39] pinctrl: mcp23s08: Fix add_data and irqchip_add_nested call order Sasha Levin
2019-07-03  2:14 ` [PATCH AUTOSEL 5.1 24/39] pinctrl: ocelot: fix gpio direction for pins after 31 Sasha Levin
2019-07-03  2:15 ` [PATCH AUTOSEL 5.1 25/39] pinctrl: ocelot: fix pinmuxing " Sasha Levin
2019-07-03  2:15 ` [PATCH AUTOSEL 5.1 26/39] dm table: don't copy from a NULL pointer in realloc_argv() Sasha Levin
2019-07-03  2:15 ` [PATCH AUTOSEL 5.1 27/39] dm verity: use message limit for data block corruption message Sasha Levin
2019-07-03  2:15 ` [PATCH AUTOSEL 5.1 28/39] x86/boot/64: Fix crash if kernel image crosses page table boundary Sasha Levin
2019-07-03  2:15 ` [PATCH AUTOSEL 5.1 29/39] x86/boot/64: Add missing fixup_pointer() for next_early_pgt access Sasha Levin
2019-07-03  2:15 ` [PATCH AUTOSEL 5.1 30/39] HID: chicony: add another quirk for PixArt mouse Sasha Levin
2019-07-03  2:15 ` [PATCH AUTOSEL 5.1 31/39] HID: uclogic: Add support for Huion HS64 tablet Sasha Levin
2019-07-03  2:15 ` [PATCH AUTOSEL 5.1 32/39] HID: multitouch: Add pointstick support for ALPS Touchpad Sasha Levin
2019-07-03  2:15 ` [PATCH AUTOSEL 5.1 33/39] pinctrl: mediatek: Ignore interrupts that are wake only during resume Sasha Levin
2019-07-03  2:15 ` [PATCH AUTOSEL 5.1 34/39] net: aquantia: fix vlans not working over bridged network Sasha Levin
2019-07-03  2:15 ` [PATCH AUTOSEL 5.1 35/39] cpu/hotplug: Fix out-of-bounds read when setting fail state Sasha Levin
2019-07-03  2:15 ` [PATCH AUTOSEL 5.1 36/39] pinctrl: mediatek: Update cur_mask in mask/mask ops Sasha Levin
2019-07-03  2:15 ` [PATCH AUTOSEL 5.1 37/39] mm/oom_kill.c: fix uninitialized oc->constraint Sasha Levin
2019-07-03  2:15 ` [PATCH AUTOSEL 5.1 38/39] fork,memcg: alloc_thread_stack_node needs to set tsk->stack Sasha Levin
2019-07-03  2:15 ` [PATCH AUTOSEL 5.1 39/39] linux/kernel.h: fix overflow for DIV_ROUND_UP_ULL Sasha Levin

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