From: Kevin Hilman <khilman@baylibre.com>
To: Martin Blumenstingl <martin.blumenstingl@googlemail.com>,
linux-amlogic@lists.infradead.org
Cc: Martin Blumenstingl <martin.blumenstingl@googlemail.com>,
linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH 1/1] ARM: dts: meson8b: fix the operating voltage of the Mali GPU
Date: Tue, 14 May 2019 17:01:37 -0700 [thread overview]
Message-ID: <7hwoisd1r2.fsf@baylibre.com> (raw)
In-Reply-To: <20190512193936.26557-2-martin.blumenstingl@googlemail.com>
Martin Blumenstingl <martin.blumenstingl@googlemail.com> writes:
> 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>
Queued as a fix for v5.2-rc (branch: v5.2/fixes)
Kevin
_______________________________________________
linux-amlogic mailing list
linux-amlogic@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-amlogic
WARNING: multiple messages have this Message-ID (diff)
From: Kevin Hilman <khilman@baylibre.com>
To: Martin Blumenstingl <martin.blumenstingl@googlemail.com>,
linux-amlogic@lists.infradead.org
Cc: Martin Blumenstingl <martin.blumenstingl@googlemail.com>,
linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH 1/1] ARM: dts: meson8b: fix the operating voltage of the Mali GPU
Date: Tue, 14 May 2019 17:01:37 -0700 [thread overview]
Message-ID: <7hwoisd1r2.fsf@baylibre.com> (raw)
In-Reply-To: <20190512193936.26557-2-martin.blumenstingl@googlemail.com>
Martin Blumenstingl <martin.blumenstingl@googlemail.com> writes:
> 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>
Queued as a fix for v5.2-rc (branch: v5.2/fixes)
Kevin
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
WARNING: multiple messages have this Message-ID (diff)
From: Kevin Hilman <khilman@baylibre.com>
To: Martin Blumenstingl <martin.blumenstingl@googlemail.com>,
linux-amlogic@lists.infradead.org
Cc: linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org,
Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Subject: Re: [PATCH 1/1] ARM: dts: meson8b: fix the operating voltage of the Mali GPU
Date: Tue, 14 May 2019 17:01:37 -0700 [thread overview]
Message-ID: <7hwoisd1r2.fsf@baylibre.com> (raw)
In-Reply-To: <20190512193936.26557-2-martin.blumenstingl@googlemail.com>
Martin Blumenstingl <martin.blumenstingl@googlemail.com> writes:
> 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>
Queued as a fix for v5.2-rc (branch: v5.2/fixes)
Kevin
next prev parent reply other threads:[~2019-05-15 0:01 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-05-12 19:39 [PATCH 0/1] ARM: dts: meson8b: another GPU fix Martin Blumenstingl
2019-05-12 19:39 ` Martin Blumenstingl
2019-05-12 19:39 ` Martin Blumenstingl
2019-05-12 19:39 ` [PATCH 1/1] ARM: dts: meson8b: fix the operating voltage of the Mali GPU Martin Blumenstingl
2019-05-12 19:39 ` Martin Blumenstingl
2019-05-12 19:39 ` Martin Blumenstingl
2019-05-15 0:01 ` Kevin Hilman [this message]
2019-05-15 0:01 ` Kevin Hilman
2019-05-15 0:01 ` Kevin Hilman
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=7hwoisd1r2.fsf@baylibre.com \
--to=khilman@baylibre.com \
--cc=linux-amlogic@lists.infradead.org \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-kernel@vger.kernel.org \
--cc=martin.blumenstingl@googlemail.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.