All of lore.kernel.org
 help / color / mirror / Atom feed
From: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
To: linux-amlogic@lists.infradead.org, khilman@baylibre.com
Cc: linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org,
	Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Subject: [PATCH 2/3] ARM: dts: meson8: use the actual frequency for the GPU's 182.1MHz OPP
Date: Wed, 25 Dec 2019 02:06:06 +0100	[thread overview]
Message-ID: <20191225010607.1504239-3-martin.blumenstingl@googlemail.com> (raw)
In-Reply-To: <20191225010607.1504239-1-martin.blumenstingl@googlemail.com>

The clock setup on Meson8 cannot achieve a Mali frequency of exactly
182.15MHz. The vendor driver uses "FCLK_DIV7 / 2" for this frequency,
which translates to 2550MHz / 7 / 2 = 182142857Hz.
Update the GPU operating point to that specific frequency to not confuse
myself when comparing the frequency from the .dts with the actual clock
rate on the system.

Fixes: 7d3f6b536e72c9 ("ARM: dts: meson8: add the Mali-450 MP6 GPU")
Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
---
 arch/arm/boot/dts/meson8.dtsi | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/arm/boot/dts/meson8.dtsi b/arch/arm/boot/dts/meson8.dtsi
index b35d7444c1f4..eedb92526968 100644
--- a/arch/arm/boot/dts/meson8.dtsi
+++ b/arch/arm/boot/dts/meson8.dtsi
@@ -130,8 +130,8 @@ opp-1992000000 {
 	gpu_opp_table: gpu-opp-table {
 		compatible = "operating-points-v2";
 
-		opp-182150000 {
-			opp-hz = /bits/ 64 <182150000>;
+		opp-182142857 {
+			opp-hz = /bits/ 64 <182142857>;
 			opp-microvolt = <1150000>;
 		};
 		opp-318750000 {
-- 
2.24.1


WARNING: multiple messages have this Message-ID (diff)
From: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
To: linux-amlogic@lists.infradead.org, khilman@baylibre.com
Cc: Martin Blumenstingl <martin.blumenstingl@googlemail.com>,
	linux-kernel@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org
Subject: [PATCH 2/3] ARM: dts: meson8: use the actual frequency for the GPU's 182.1MHz OPP
Date: Wed, 25 Dec 2019 02:06:06 +0100	[thread overview]
Message-ID: <20191225010607.1504239-3-martin.blumenstingl@googlemail.com> (raw)
In-Reply-To: <20191225010607.1504239-1-martin.blumenstingl@googlemail.com>

The clock setup on Meson8 cannot achieve a Mali frequency of exactly
182.15MHz. The vendor driver uses "FCLK_DIV7 / 2" for this frequency,
which translates to 2550MHz / 7 / 2 = 182142857Hz.
Update the GPU operating point to that specific frequency to not confuse
myself when comparing the frequency from the .dts with the actual clock
rate on the system.

Fixes: 7d3f6b536e72c9 ("ARM: dts: meson8: add the Mali-450 MP6 GPU")
Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
---
 arch/arm/boot/dts/meson8.dtsi | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/arm/boot/dts/meson8.dtsi b/arch/arm/boot/dts/meson8.dtsi
index b35d7444c1f4..eedb92526968 100644
--- a/arch/arm/boot/dts/meson8.dtsi
+++ b/arch/arm/boot/dts/meson8.dtsi
@@ -130,8 +130,8 @@ opp-1992000000 {
 	gpu_opp_table: gpu-opp-table {
 		compatible = "operating-points-v2";
 
-		opp-182150000 {
-			opp-hz = /bits/ 64 <182150000>;
+		opp-182142857 {
+			opp-hz = /bits/ 64 <182142857>;
 			opp-microvolt = <1150000>;
 		};
 		opp-318750000 {
-- 
2.24.1


_______________________________________________
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: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
To: linux-amlogic@lists.infradead.org, khilman@baylibre.com
Cc: Martin Blumenstingl <martin.blumenstingl@googlemail.com>,
	linux-kernel@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org
Subject: [PATCH 2/3] ARM: dts: meson8: use the actual frequency for the GPU's 182.1MHz OPP
Date: Wed, 25 Dec 2019 02:06:06 +0100	[thread overview]
Message-ID: <20191225010607.1504239-3-martin.blumenstingl@googlemail.com> (raw)
In-Reply-To: <20191225010607.1504239-1-martin.blumenstingl@googlemail.com>

The clock setup on Meson8 cannot achieve a Mali frequency of exactly
182.15MHz. The vendor driver uses "FCLK_DIV7 / 2" for this frequency,
which translates to 2550MHz / 7 / 2 = 182142857Hz.
Update the GPU operating point to that specific frequency to not confuse
myself when comparing the frequency from the .dts with the actual clock
rate on the system.

Fixes: 7d3f6b536e72c9 ("ARM: dts: meson8: add the Mali-450 MP6 GPU")
Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
---
 arch/arm/boot/dts/meson8.dtsi | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/arm/boot/dts/meson8.dtsi b/arch/arm/boot/dts/meson8.dtsi
index b35d7444c1f4..eedb92526968 100644
--- a/arch/arm/boot/dts/meson8.dtsi
+++ b/arch/arm/boot/dts/meson8.dtsi
@@ -130,8 +130,8 @@ opp-1992000000 {
 	gpu_opp_table: gpu-opp-table {
 		compatible = "operating-points-v2";
 
-		opp-182150000 {
-			opp-hz = /bits/ 64 <182150000>;
+		opp-182142857 {
+			opp-hz = /bits/ 64 <182142857>;
 			opp-microvolt = <1150000>;
 		};
 		opp-318750000 {
-- 
2.24.1


_______________________________________________
linux-amlogic mailing list
linux-amlogic@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-amlogic

  parent reply	other threads:[~2019-12-25  1:06 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-12-25  1:06 [PATCH 0/3] ARM: dts: meson: fixes for GPU DVFS Martin Blumenstingl
2019-12-25  1:06 ` Martin Blumenstingl
2019-12-25  1:06 ` Martin Blumenstingl
2019-12-25  1:06 ` [PATCH 1/3] ARM: dts: meson8b: fix the clock controller compatible string Martin Blumenstingl
2019-12-25  1:06   ` Martin Blumenstingl
2019-12-25  1:06   ` Martin Blumenstingl
2019-12-25  1:06 ` Martin Blumenstingl [this message]
2019-12-25  1:06   ` [PATCH 2/3] ARM: dts: meson8: use the actual frequency for the GPU's 182.1MHz OPP Martin Blumenstingl
2019-12-25  1:06   ` Martin Blumenstingl
2019-12-25  1:06 ` [PATCH 3/3] ARM: dts: meson8b: use the actual frequency for the GPU's 364MHz OPP Martin Blumenstingl
2019-12-25  1:06   ` Martin Blumenstingl
2019-12-25  1:06   ` Martin Blumenstingl
2020-01-08 19:01 ` [PATCH 0/3] ARM: dts: meson: fixes for GPU DVFS Kevin Hilman
2020-01-08 19:01   ` Kevin Hilman
2020-01-08 19:01   ` Kevin Hilman
2020-01-09 18:21 ` patchwork-bot+linux-amlogic

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=20191225010607.1504239-3-martin.blumenstingl@googlemail.com \
    --to=martin.blumenstingl@googlemail.com \
    --cc=khilman@baylibre.com \
    --cc=linux-amlogic@lists.infradead.org \
    --cc=linux-arm-kernel@lists.infradead.org \
    --cc=linux-kernel@vger.kernel.org \
    /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.