Il 20/09/24 15:41, Pablo Sun ha scritto:
Configure GPU regulator supplies and enable GPU for GENIO 700 EVK. The GPU in MT8390 & MT8188 has two power inputs: "DVDD_GPU" and "DVDD_SRAM_GPU". In Genio 700 EVK, DVDD_GPU is supplied by mt6359_vproc2_buck_reg, and DVDD_SRAM_GPU is supplied by mt6359_vsram_others_ldo_reg. According to section 5.2 "Recommended Operating Conditions" in MT8390 IoT Application Processor Datasheet v1.9, The recommended operating voltage ranges are: - DVDD_GPU: min 0.55V, max 0.86V, typical 0.75V - DVDD_SRAM_GPU: min 0.71V, max 0.92V, typical 0.85V In this commit, we set DVDD_SRAM_GPU to typical 0.85V. It is possbile to couple it to the DVDD_GPU in future patches. Signed-off-by: Pablo Sun <pablo.sun@xxxxxxxxxxxx>
Is there any real difference between MT8390 and MT8188 in terms of the GPU OPPs? I see that on MT8188, frequencies up to 880MHz want a DVDD_SRAM_GPU of 0.750V, then 0.775/0.762/0.750 (bin1-4/5/6) on 915MHz, and 0.800/0.775/0.750 (bin1-4/5/6) on 950MHz. Those never call for 0.850V...! So is MT8188 (Chromebooks) wrong, or is MT8390 different in that? Cheers, Angelo
--- .../dts/mediatek/mt8390-genio-700-evk.dts | 24 +++++++++++++++++++ 1 file changed, 24 insertions(+) diff --git a/arch/arm64/boot/dts/mediatek/mt8390-genio-700-evk.dts b/arch/arm64/boot/dts/mediatek/mt8390-genio-700-evk.dts index 1474bef7e754..a1d6f4cd4e5f 100644 --- a/arch/arm64/boot/dts/mediatek/mt8390-genio-700-evk.dts +++ b/arch/arm64/boot/dts/mediatek/mt8390-genio-700-evk.dts @@ -190,6 +190,11 @@ usb_p2_vbus: regulator-10 { }; };+&gpu {+ mali-supply = <&mt6359_vproc2_buck_reg>; + status = "okay"; +}; + &i2c0 { pinctrl-names = "default"; pinctrl-0 = <&i2c0_pins>; @@ -253,6 +258,14 @@ &i2c6 { status = "okay"; };+&mfg0 {+ domain-supply = <&mt6359_vproc2_buck_reg>; +}; + +&mfg1 { + domain-supply = <&mt6359_vsram_others_ldo_reg>; +}; + &mmc0 { status = "okay"; pinctrl-names = "default", "state_uhs"; @@ -314,6 +327,11 @@ &mt6359_vpa_buck_reg { regulator-max-microvolt = <3100000>; };+&mt6359_vproc2_buck_reg {+ regulator-min-microvolt = <550000>; + regulator-max-microvolt = <860000>; +}; + &mt6359_vpu_buck_reg { regulator-always-on; }; @@ -326,6 +344,12 @@ &mt6359_vsim1_ldo_reg { regulator-enable-ramp-delay = <480>; };+/* for GPU SRAM */+&mt6359_vsram_others_ldo_reg { + regulator-min-microvolt = <850000>; + regulator-max-microvolt = <850000>; +}; + &mt6359_vufs_ldo_reg { regulator-always-on; };
