* [PATCH 1/3] ARM: dts: meson8b: fix the clock controller compatible string
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 ` [PATCH 2/3] ARM: dts: meson8: use the actual frequency for the GPU's 182.1MHz OPP Martin Blumenstingl
` (3 subsequent siblings)
4 siblings, 0 replies; 6+ messages in thread
From: Martin Blumenstingl @ 2019-12-25 1:06 UTC (permalink / raw)
To: linux-amlogic, khilman
Cc: Martin Blumenstingl, linux-kernel, linux-arm-kernel
The Meson8b clock controller is an evolution of the Meson8 clock
controller. The clock controller on Meson8b contains two identical mali
clock trees for glitch-free rate switching.
Use the correct compatible string to make use of the glitch free mux.
Fixes: b6db3936f2833c ("ARM: dts: meson: switch the clock controller to the HHI register area")
Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
---
arch/arm/boot/dts/meson8b.dtsi | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/arm/boot/dts/meson8b.dtsi b/arch/arm/boot/dts/meson8b.dtsi
index 8ac8bdfaf58f..5b5791924753 100644
--- a/arch/arm/boot/dts/meson8b.dtsi
+++ b/arch/arm/boot/dts/meson8b.dtsi
@@ -442,7 +442,7 @@ &gpio_intc {
&hhi {
clkc: clock-controller {
- compatible = "amlogic,meson8-clkc";
+ compatible = "amlogic,meson8b-clkc";
clocks = <&xtal>, <&ddr_clkc DDR_CLKID_DDR_PLL>;
clock-names = "xtal", "ddr_pll";
#clock-cells = <1>;
--
2.24.1
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^ permalink raw reply related [flat|nested] 6+ messages in thread* [PATCH 2/3] ARM: dts: meson8: use the actual frequency for the GPU's 182.1MHz OPP
2019-12-25 1:06 [PATCH 0/3] ARM: dts: meson: fixes for GPU DVFS 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 ` [PATCH 3/3] ARM: dts: meson8b: use the actual frequency for the GPU's 364MHz OPP Martin Blumenstingl
` (2 subsequent siblings)
4 siblings, 0 replies; 6+ messages in thread
From: Martin Blumenstingl @ 2019-12-25 1:06 UTC (permalink / raw)
To: linux-amlogic, khilman
Cc: Martin Blumenstingl, linux-kernel, linux-arm-kernel
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
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^ permalink raw reply related [flat|nested] 6+ messages in thread* [PATCH 3/3] ARM: dts: meson8b: use the actual frequency for the GPU's 364MHz OPP
2019-12-25 1:06 [PATCH 0/3] ARM: dts: meson: fixes for GPU DVFS 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 ` [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
2020-01-08 19:01 ` [PATCH 0/3] ARM: dts: meson: fixes for GPU DVFS Kevin Hilman
2020-01-09 18:21 ` patchwork-bot+linux-amlogic
4 siblings, 0 replies; 6+ messages in thread
From: Martin Blumenstingl @ 2019-12-25 1:06 UTC (permalink / raw)
To: linux-amlogic, khilman
Cc: Martin Blumenstingl, linux-kernel, linux-arm-kernel
The clock setup on Meson8 cannot achieve a Mali frequency of exactly
182.15MHz. The vendor driver uses "FCLK_DIV7 / 1" for this frequency,
which translates to 2550MHz / 7 / 1 = 364285714Hz.
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: c3ea80b6138cae ("ARM: dts: meson8b: add the Mali-450 MP2 GPU")
Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
---
arch/arm/boot/dts/meson8b.dtsi | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/arch/arm/boot/dts/meson8b.dtsi b/arch/arm/boot/dts/meson8b.dtsi
index 5b5791924753..e34b039b9357 100644
--- a/arch/arm/boot/dts/meson8b.dtsi
+++ b/arch/arm/boot/dts/meson8b.dtsi
@@ -126,8 +126,8 @@ opp-255000000 {
opp-hz = /bits/ 64 <255000000>;
opp-microvolt = <1100000>;
};
- opp-364300000 {
- opp-hz = /bits/ 64 <364300000>;
+ opp-364285714 {
+ opp-hz = /bits/ 64 <364285714>;
opp-microvolt = <1100000>;
};
opp-425000000 {
--
2.24.1
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^ permalink raw reply related [flat|nested] 6+ messages in thread* Re: [PATCH 0/3] ARM: dts: meson: fixes for GPU DVFS
2019-12-25 1:06 [PATCH 0/3] ARM: dts: meson: fixes for GPU DVFS Martin Blumenstingl
` (2 preceding siblings ...)
2019-12-25 1:06 ` [PATCH 3/3] ARM: dts: meson8b: use the actual frequency for the GPU's 364MHz OPP Martin Blumenstingl
@ 2020-01-08 19:01 ` Kevin Hilman
2020-01-09 18:21 ` patchwork-bot+linux-amlogic
4 siblings, 0 replies; 6+ messages in thread
From: Kevin Hilman @ 2020-01-08 19:01 UTC (permalink / raw)
To: Martin Blumenstingl, linux-amlogic
Cc: Martin Blumenstingl, linux-kernel, linux-arm-kernel
Martin Blumenstingl <martin.blumenstingl@googlemail.com> writes:
> While testing my patch to add DVFS support to the lima driver [0] I
> found one bug and two inconveniences with the GPU clocks in the
> Meson8 and Meson8b .dts:
> - the first patch is an actual fix so the two mali GPU clock trees can
> actually be used on Meson8b
> - patch two and three are to prevent confusion when comparing the
> frequencies from the .dts with the actual ones on the system
>
> Neither of these patches are critical, so I based them on top of
> v5.6/dt (meaning they target Linux 5.6, not v5.5/fixes).
Queued for v5.6,
Thanks,
Kevin
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^ permalink raw reply [flat|nested] 6+ messages in thread* Re: [PATCH 0/3] ARM: dts: meson: fixes for GPU DVFS
2019-12-25 1:06 [PATCH 0/3] ARM: dts: meson: fixes for GPU DVFS Martin Blumenstingl
` (3 preceding siblings ...)
2020-01-08 19:01 ` [PATCH 0/3] ARM: dts: meson: fixes for GPU DVFS Kevin Hilman
@ 2020-01-09 18:21 ` patchwork-bot+linux-amlogic
4 siblings, 0 replies; 6+ messages in thread
From: patchwork-bot+linux-amlogic @ 2020-01-09 18:21 UTC (permalink / raw)
To: Martin Blumenstingl; +Cc: linux-amlogic, khilman
Hello:
This series was applied to khilman/linux-amlogic.git (refs/heads/for-next).
On Wed, 25 Dec 2019 02:06:04 +0100 you wrote:
> While testing my patch to add DVFS support to the lima driver [0] I
> found one bug and two inconveniences with the GPU clocks in the
> Meson8 and Meson8b .dts:
> - the first patch is an actual fix so the two mali GPU clock trees can
> actually be used on Meson8b
> - patch two and three are to prevent confusion when comparing the
> frequencies from the .dts with the actual ones on the system
>
> [...]
Here is a summary with links:
- [1/3] ARM: dts: meson8b: fix the clock controller compatible string
https://git.kernel.org/khilman/linux-amlogic/c/da256557441700d4f3f95c6e94ef57794acd6bfc
- [2/3] ARM: dts: meson8: use the actual frequency for the GPU's 182.1MHz OPP
https://git.kernel.org/khilman/linux-amlogic/c/fe634a7a9a57fb736e39fb71aa9adc6448a90f94
- [3/3] ARM: dts: meson8b: use the actual frequency for the GPU's 364MHz OPP
https://git.kernel.org/khilman/linux-amlogic/c/c3dd3315ab58b2cfa1916df55b0d0f9fbd94266f
You are awesome, thank you!
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^ permalink raw reply [flat|nested] 6+ messages in thread