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Commit 7241f32c authored by Rajesh Kemisetti's avatar Rajesh Kemisetti
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ARM: dts: msm: Defer regulator disable for SDM660 GPU SMMU 



IOMMU driver takes vote on regulator for every unmap, attach or
detach call and removes it once done.

This is an overhead if GPU is in power collapse mode and huge
number of unmap calls are pending from a given context. It would
end up in turning ON/OFF the regulator those many times.

To optimize this, do a deferred regulator disable about 80ms so that
all subsequent requests to regulator enable will be just refcounted.

Change-Id: I816156f1bdf34a2c0cb8171c2ca1df6b3ae8fe72
Signed-off-by: default avatarRajesh Kemisetti <rajeshk@codeaurora.org>
parent 2bfc0eda

arch/arm/boot/dts/qcom/msm-arm-smmu-660.dtsi

+1 −0
Original line number Diff line number Diff line
@@ -157,6 +157,7 @@ 
			     <GIC_SPI 117 IRQ_TYPE_LEVEL_HIGH>,

			     <GIC_SPI 349 IRQ_TYPE_LEVEL_HIGH>,

			     <GIC_SPI 350 IRQ_TYPE_LEVEL_HIGH>;

		qcom,deferred-regulator-disable-delay = <80>;

		vdd-supply = <&gdsc_gpu_cx>;

		clocks = <&clock_gcc GCC_GPU_CFG_AHB_CLK>,

			 <&clock_gcc GCC_BIMC_GFX_CLK>,