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Date: Thu, 9 Sep 2021 11:13:15 +0000
From: Neal Liu <neal_liu@...eedtech.com>
To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
CC: Alan Stern <stern@...land.harvard.edu>,
Tony Prisk <linux@...sktech.co.nz>,
"linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
"linux-arm-kernel@...ts.infradead.org"
<linux-arm-kernel@...ts.infradead.org>,
Tao Ren <rentao.bupt@...il.com>, BMC-SW <BMC-SW@...eedtech.com>
Subject: RE: [PATCH v3] usb: ehci: handshake CMD_RUN instead of STS_HALT
> -----Original Message-----
> From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
> Sent: Thursday, September 9, 2021 2:38 PM
> To: Neal Liu <neal_liu@...eedtech.com>
> Cc: Alan Stern <stern@...land.harvard.edu>; Tony Prisk
> <linux@...sktech.co.nz>; linux-usb@...r.kernel.org;
> linux-kernel@...r.kernel.org; linux-arm-kernel@...ts.infradead.org; Tao Ren
> <rentao.bupt@...il.com>; BMC-SW <BMC-SW@...eedtech.com>
> Subject: Re: [PATCH v3] usb: ehci: handshake CMD_RUN instead of STS_HALT
>
> On Thu, Sep 09, 2021 at 02:36:52PM +0800, Neal Liu wrote:
Fix STS_HALT handshake failure for Aspeed 2500/2600 platform.
Change since v2:
- Use my "real" name for both the Signed-off-by: line and the From: line.
Change since v1:
- Handshake CMD_RUN status on startup instead of easily skip it.
---
> > For Aspeed, HCHalted status depends on not only Run/Stop but also
> > ASS/PSS status.
> > Handshake CMD_RUN on startup instead.
> >
> > Signed-off-by: Neal Liu <neal_liu@...eedtech.com>
> > Acked-by: Alan Stern <stern@...land.harvard.edu>
> > Reviewed-by: Tao Ren <rentao.bupt@...il.com>
> > Tested-by: Tao Ren <rentao.bupt@...il.com>
> >
> > ---
> > drivers/usb/host/ehci-hcd.c | 11 ++++++++++-
> > drivers/usb/host/ehci-platform.c | 6 ++++++
> > drivers/usb/host/ehci.h | 1 +
> > 3 files changed, 17 insertions(+), 1 deletion(-)
> >
> > diff --git a/drivers/usb/host/ehci-hcd.c b/drivers/usb/host/ehci-hcd.c
> > index 10b0365f3439..01c022e46aa2 100644
> > --- a/drivers/usb/host/ehci-hcd.c
> > +++ b/drivers/usb/host/ehci-hcd.c
> > @@ -634,7 +634,16 @@ static int ehci_run (struct usb_hcd *hcd)
> > /* Wait until HC become operational */
> > ehci_readl(ehci, &ehci->regs->command); /* unblock posted writes */
> > msleep(5);
> > - rc = ehci_handshake(ehci, &ehci->regs->status, STS_HALT, 0, 100 * 1000);
> > +
> > + /* For Aspeed, STS_HALT also depends on ASS/PSS status.
> > + * Skip this check on startup.
> > + */
> > + if (ehci->is_aspeed)
> > + rc = ehci_handshake(ehci, &ehci->regs->command, CMD_RUN,
> > + 1, 100 * 1000);
> > + else
> > + rc = ehci_handshake(ehci, &ehci->regs->status, STS_HALT,
> > + 0, 100 * 1000);
> >
> > up_write(&ehci_cf_port_reset_rwsem);
> >
> > diff --git a/drivers/usb/host/ehci-platform.c
> > b/drivers/usb/host/ehci-platform.c
> > index c70f2d0b4aaf..c3dc906274d9 100644
> > --- a/drivers/usb/host/ehci-platform.c
> > +++ b/drivers/usb/host/ehci-platform.c
> > @@ -297,6 +297,12 @@ static int ehci_platform_probe(struct
> platform_device *dev)
> > "has-transaction-translator"))
> > hcd->has_tt = 1;
> >
> > + if (of_device_is_compatible(dev->dev.of_node,
> > + "aspeed,ast2500-ehci") ||
> > + of_device_is_compatible(dev->dev.of_node,
> > + "aspeed,ast2600-ehci"))
> > + ehci->is_aspeed = 1;
> > +
> > if (soc_device_match(quirk_poll_match))
> > priv->quirk_poll = true;
> >
> > diff --git a/drivers/usb/host/ehci.h b/drivers/usb/host/ehci.h index
> > 80bb823aa9fe..fdd073cc053b 100644
> > --- a/drivers/usb/host/ehci.h
> > +++ b/drivers/usb/host/ehci.h
> > @@ -219,6 +219,7 @@ struct ehci_hcd { /* one per controller */
> > unsigned need_oc_pp_cycle:1; /* MPC834X port power */
> > unsigned imx28_write_fix:1; /* For Freescale i.MX28 */
> > unsigned spurious_oc:1;
> > + unsigned is_aspeed:1;
> >
> > /* required for usb32 quirk */
> > #define OHCI_CTRL_HCFS (3 << 6)
> > --
> > 2.17.1
> >
>
> Hi,
>
> This is the friendly patch-bot of Greg Kroah-Hartman. You have sent him
> a patch that has triggered this response. He used to manually respond
> to these common problems, but in order to save his sanity (he kept
> writing the same thing over and over, yet to different people), I was
> created. Hopefully you will not take offence and will fix the problem
> in your patch and resubmit it so that it can be accepted into the Linux
> kernel tree.
>
> You are receiving this message because of the following common error(s)
> as indicated below:
>
> - You did not specify a description of why the patch is needed, or
> possibly, any description at all, in the email body. Please read the
> section entitled "The canonical patch format" in the kernel file,
> Documentation/SubmittingPatches for what is needed in order to
> properly describe the change.
>
> - This looks like a new version of a previously submitted patch, but you
> did not list below the --- line any changes from the previous version.
> Please read the section entitled "The canonical patch format" in the
> kernel file, Documentation/SubmittingPatches for what needs to be done
> here to properly describe this.
>
> If you wish to discuss this problem further, or you have questions about
> how to resolve this issue, please feel free to respond to this email and
> Greg will reply once he has dug out from the pending patches received
> from other developers.
>
> thanks,
>
> greg k-h's patch email bot
Do you prefer fixing canonical patch format inline or sending new patch v4?
I added more description and the changes from previous version.
Thanks
-Neal
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