iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

arm64: dts: amlogic: meson-gxm: add the Mali OPP table and use DVFS

Browse Source 
Add the OPP table for the Mali-T820 GPU and drop the hardcoded initial
clock configuration. This enables GPU DVFS and thus saves power when the
GPU is not in use while still being able switch to a higher clock on
demand.

Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: Kevin Hilman <khilman@baylibre.com>
Link: https://lore.kernel.org/r/20200719173213.639540-3-martin.blumenstingl@googlemail.com
This commit is contained in:
Martin Blumenstingl 2020-07-19 19:32:12 +02:00 committed by Kevin Hilman
parent 46ffadc7e6
commit 8f16cfabbc
1 changed files with 30 additions and 15 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

45
arch/arm64/boot/dts/amlogic/meson-gxm.dtsi
View File

@ -82,6 +82,35 @@
#cooling-cells = <2>;
};
};
gpu_opp_table: opp-table {
compatible = "operating-points-v2";
opp-125000000 {
opp-hz = /bits/ 64 <125000000>;
opp-microvolt = <950000>;
};
opp-250000000 {
opp-hz = /bits/ 64 <250000000>;
opp-microvolt = <950000>;
};
opp-285714285 {
opp-hz = /bits/ 64 <285714285>;
opp-microvolt = <950000>;
};
opp-400000000 {
opp-hz = /bits/ 64 <400000000>;
opp-microvolt = <950000>;
};
opp-500000000 {
opp-hz = /bits/ 64 <500000000>;
opp-microvolt = <950000>;
};
opp-666666666 {
opp-hz = /bits/ 64 <666666666>;
opp-microvolt = <950000>;
};
};
};
&apb {
@ -106,21 +135,7 @@
interrupt-names = "job", "mmu", "gpu";
clocks = <&clkc CLKID_MALI>;
resets = <&reset RESET_MALI_CAPB3>, <&reset RESET_MALI>;
/*
* Mali clocking is provided by two identical clock paths
* MALI_0 and MALI_1 muxed to a single clock by a glitch
* free mux to safely change frequency while running.
*/
assigned-clocks = <&clkc CLKID_MALI_0_SEL>,
<&clkc CLKID_MALI_0>,
<&clkc CLKID_MALI>; /* Glitch free mux */
assigned-clock-parents = <&clkc CLKID_FCLK_DIV3>,
<0>, /* Do Nothing */
<&clkc CLKID_MALI_0>;
assigned-clock-rates = <0>, /* Do Nothing */
<666666666>,
<0>; /* Do Nothing */
operating-points-v2 = <&gpu_opp_table>;
};
};