diff mbox series

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

Message ID 1621410238-31395-6-git-send-email-wcheng@codeaurora.org (mailing list archive)
State Superseded
Headers show
Series Re-introduce TX FIFO resize for larger EP bursting | expand

Commit Message

Wesley Cheng May 19, 2021, 7:43 a.m. UTC
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@kernel.org>
Signed-off-by: Wesley Cheng <wcheng@codeaurora.org>
---
 arch/arm64/boot/dts/qcom/sm8150.dtsi | 1 +
 1 file changed, 1 insertion(+)

Comments

Bjorn Andersson May 29, 2021, 5:07 p.m. UTC | #1
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@kernel.org>
> Signed-off-by: Wesley Cheng <wcheng@codeaurora.org>

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?

Regards,
Bjorn

> ---
>  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";
>  			};
> -- 
> The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
> a Linux Foundation Collaborative Project
>
Jack Pham May 29, 2021, 7:24 p.m. UTC | #2
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@kernel.org>
> > Signed-off-by: Wesley Cheng <wcheng@codeaurora.org>
> 
> 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@codeaurora.org/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";
> >  			};
diff mbox series

Patch

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";
 			};