Re: [PATCH v8 5/5] arm64: boot: dts: qcom: sm8150: Enable dynamic TX FIFO resize logic

From: Jack Pham
Date: Sat May 29 2021 - 15:24:50 EST


Hi Bjorn,

On Sat, May 29, 2021 at 12:07:31PM -0500, Bjorn Andersson wrote:
> On Wed 19 May 02:43 CDT 2021, Wesley Cheng wrote:
>
> > Enable the flexible TX FIFO resize logic on SM8150. Using a larger TX FIFO
> > SZ can help account for situations when system latency is greater than the
> > USB bus transmission latency.
> >
> > Reviewed-by: Rob Herring <robh@xxxxxxxxxx>
> > Signed-off-by: Wesley Cheng <wcheng@xxxxxxxxxxxxxx>
>
> Based on my previous request of always adding this for the Qualcomm
> platforms that supports it, which is implemented in patch 4, I don't see
> a need for this patch.
>
> Am I missing something?

Looks like Wesley had quickly sent a V9 of the series right after V8,
and the DTSI change is dropped.

https://lore.kernel.org/linux-usb/1621410561-32762-1-git-send-email-wcheng@xxxxxxxxxxxxxx/T/#t

Thanks,
Jack

> > ---
> > arch/arm64/boot/dts/qcom/sm8150.dtsi | 1 +
> > 1 file changed, 1 insertion(+)
> >
> > diff --git a/arch/arm64/boot/dts/qcom/sm8150.dtsi b/arch/arm64/boot/dts/qcom/sm8150.dtsi
> > index 51235a9..8f532cb 100644
> > --- a/arch/arm64/boot/dts/qcom/sm8150.dtsi
> > +++ b/arch/arm64/boot/dts/qcom/sm8150.dtsi
> > @@ -2275,6 +2275,7 @@
> > iommus = <&apps_smmu 0x140 0>;
> > snps,dis_u2_susphy_quirk;
> > snps,dis_enblslpm_quirk;
> > + tx-fifo-resize;
> > phys = <&usb_1_hsphy>, <&usb_1_ssphy>;
> > phy-names = "usb2-phy", "usb3-phy";
> > };

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