linux-kernel - Re: [PATCH v3 3/4] usb: mtk-xhci: add support remote wakeup of mt8196

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <91de8a46de1f41462ea8aab138e47d75f11e17b9.camel@mediatek.com>
Date: Sat, 22 Feb 2025 08:33:44 +0000
From: Chunfeng Yun (云春峰) <Chunfeng.Yun@...iatek.com>
To: "robh@...nel.org" <robh@...nel.org>, AngeloGioacchino Del Regno
	<angelogioacchino.delregno@...labora.com>, "gregkh@...uxfoundation.org"
	<gregkh@...uxfoundation.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>, "conor+dt@...nel.org"
	<conor+dt@...nel.org>, "linux-arm-kernel@...ts.infradead.org"
	<linux-arm-kernel@...ts.infradead.org>, "matthias.bgg@...il.com"
	<matthias.bgg@...il.com>, "krzk+dt@...nel.org" <krzk+dt@...nel.org>
Subject: Re: [PATCH v3 3/4] usb: mtk-xhci: add support remote wakeup of mt8196

On Tue, 2025-02-18 at 09:57 +0100, AngeloGioacchino Del Regno wrote:
> External email : Please do not click links or open attachments until
> you have verified the sender or the content.
> 
> 
> Il 15/02/25 11:06, Chunfeng Yun ha scritto:
> > There are three USB controllers on mt8196, each controller's wakeup
> > control is different, add some specific versions for them.
> > 
> > Signed-off-by: Chunfeng Yun <chunfeng.yun@...iatek.com>
> 
> Since all of the USB controllers of the MT8196 SoC are behind MTU3,
> and
> since the wakeup control for all of them will be handled by the MTU3
> driver
> and *not* by the xhci-mtk driver....
> 
> NACK!
> 
> Please drop this commit.
Please help to pick up these patches, I also hate to add these specific
wakeup ways, but our haredware designer do not follow the hwip rules
sometimes.

Thank you.

> 
> Cheers,
> Angelo
> 
> > ---
> > v3: no changes
> > v2: modify marcos name
> > ---
> >   drivers/usb/host/xhci-mtk.c | 26 ++++++++++++++++++++++++++
> >   1 file changed, 26 insertions(+)
> > 
> > diff --git a/drivers/usb/host/xhci-mtk.c b/drivers/usb/host/xhci-
> > mtk.c
> > index 904831344440..3f8e37b25322 100644
> > --- a/drivers/usb/host/xhci-mtk.c
> > +++ b/drivers/usb/host/xhci-mtk.c
> > @@ -113,6 +113,14 @@
> >   #define WC1_IS_P_95         BIT(12)
> >   #define WC1_IS_EN_P0_95             BIT(6)
> > 
> > +/* mt8196 */
> > +#define PERI_WK_CTRL0_8196   0x08
> > +#define WC0_IS_EN_P0_96              BIT(0)
> > +#define WC0_IS_EN_P1_96              BIT(7)
> > +
> > +#define PERI_WK_CTRL1_8196   0x10
> > +#define WC1_IS_EN_P2_96              BIT(0)
> > +
> >   /* mt2712 etc */
> >   #define PERI_SSUSB_SPM_CTRL 0x0
> >   #define SSC_IP_SLEEP_EN     BIT(4)
> > @@ -129,6 +137,9 @@ enum ssusb_uwk_vers {
> >       SSUSB_UWK_V1_4,         /* mt8195 IP1 */
> >       SSUSB_UWK_V1_5,         /* mt8195 IP2 */
> >       SSUSB_UWK_V1_6,         /* mt8195 IP3 */
> > +     SSUSB_UWK_V1_7,         /* mt8196 IP0 */
> > +     SSUSB_UWK_V1_8,         /* mt8196 IP1 */
> > +     SSUSB_UWK_V1_9,         /* mt8196 IP2 */
> >   };
> > 
> >   /*
> > @@ -381,6 +392,21 @@ static void usb_wakeup_ip_sleep_set(struct
> > xhci_hcd_mtk *mtk, bool enable)
> >               msk = WC0_IS_EN_P3_95 | WC0_IS_C_95(0x7) |
> > WC0_IS_P_95;
> >               val = enable ? (WC0_IS_EN_P3_95 | WC0_IS_C_95(0x1)) :
> > 0;
> >               break;
> > +     case SSUSB_UWK_V1_7:
> > +             reg = mtk->uwk_reg_base + PERI_WK_CTRL0_8196;
> > +             msk = WC0_IS_EN_P0_96;
> > +             val = enable ? msk : 0;
> > +             break;
> > +     case SSUSB_UWK_V1_8:
> > +             reg = mtk->uwk_reg_base + PERI_WK_CTRL0_8196;
> > +             msk = WC0_IS_EN_P1_96;
> > +             val = enable ? msk : 0;
> > +             break;
> > +     case SSUSB_UWK_V1_9:
> > +             reg = mtk->uwk_reg_base + PERI_WK_CTRL1_8196;
> > +             msk = WC1_IS_EN_P2_96;
> > +             val = enable ? msk : 0;
> > +             break;
> >       case SSUSB_UWK_V2:
> >               reg = mtk->uwk_reg_base + PERI_SSUSB_SPM_CTRL;
> >               msk = SSC_IP_SLEEP_EN | SSC_SPM_INT_EN;
> 
> 
>