linux-kernel - Re: [PATCH v3 3/3] arm64: dts: mediatek: mt8195: Add 'rx-fifo-depth' for cherry

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Date: Wed, 27 Dec 2023 01:59:22 +0000
From: Chunfeng Yun (云春峰) <Chunfeng.Yun@...iatek.com>
To: "angelogioacchino.delregno@...labora.com"
	<angelogioacchino.delregno@...labora.com>, "gregkh@...uxfoundation.org"
	<gregkh@...uxfoundation.org>, "robh+dt@...nel.org" <robh+dt@...nel.org>,
	"krzysztof.kozlowski+dt@...aro.org" <krzysztof.kozlowski+dt@...aro.org>
CC: "linux-mediatek@...ts.infradead.org" <linux-mediatek@...ts.infradead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"mathias.nyman@...el.com" <mathias.nyman@...el.com>,
	Eddie Hung (洪正鑫) <Eddie.Hung@...iatek.com>,
	"conor+dt@...nel.org" <conor+dt@...nel.org>,
	Macpaul Lin (林智斌) <Macpaul.Lin@...iatek.com>,
	"linux-arm-kernel@...ts.infradead.org"
	<linux-arm-kernel@...ts.infradead.org>, "matthias.bgg@...il.com"
	<matthias.bgg@...il.com>
Subject: Re: [PATCH v3 3/3] arm64: dts: mediatek: mt8195: Add 'rx-fifo-depth'
 for cherry

On Wed, 2023-12-20 at 11:30 +0100, AngeloGioacchino Del Regno wrote:
> Il 20/12/23 03:58, Chunfeng Yun ha scritto:
> > Add the quirk property "rx-fifo-depth" to work around Gen1 isoc-in
> > transfer issue which send out unexpected ACK even after device
> > already finished the burst transfer with a short patcket, specially
> > for a 4K camera device.
> > 
> > Signed-off-by: Chunfeng Yun <chunfeng.yun@...iatek.com>
> > ---
> > v3: change value according to binding
> > v2: use 'rx-fifo-depth' property
> > ---
> >   arch/arm64/boot/dts/mediatek/mt8195-cherry.dtsi | 2 ++
> >   1 file changed, 2 insertions(+)
> > 
> > diff --git a/arch/arm64/boot/dts/mediatek/mt8195-cherry.dtsi
> > b/arch/arm64/boot/dts/mediatek/mt8195-cherry.dtsi
> > index dd5b89b73190..58593348b810 100644
> > --- a/arch/arm64/boot/dts/mediatek/mt8195-cherry.dtsi
> > +++ b/arch/arm64/boot/dts/mediatek/mt8195-cherry.dtsi
> > @@ -1185,6 +1185,7 @@
> >   
> 
> Can you please place rx-fifo-depth before power supplies?
Ok, thanks

> 
> after which,
> 
> Reviewed-by: AngeloGioacchino Del Regno <
> angelogioacchino.delregno@...labora.com>
> 
> Thanks,
> Angelo
> 
> >   	vusb33-supply = <&mt6359_vusb_ldo_reg>;
> >   	vbus-supply = <&usb_vbus>;
> > +	rx-fifo-depth = <3>;
> >   };
> >   
> >   &xhci1 {
> > @@ -1192,6 +1193,7 @@
> >   
> >   	vusb33-supply = <&mt6359_vusb_ldo_reg>;
> >   	vbus-supply = <&usb_vbus>;
> > +	rx-fifo-depth = <3>;
> >   };
> >   
> >   &xhci2 {
> 
>