From: Greg KH <gregkh@linuxfoundation.org>
To: Sakari Ailus <sakari.ailus@linux.intel.com>
Cc: linux-usb@vger.kernel.org, linux-media@vger.kernel.org,
laurent.pinchart@ideasonboard.com, hdegoede@redhat.com,
Thinh.Nguyen@synopsys.com, Amardeep Rai <amardeep.rai@intel.com>,
Kannappan R <r.kannappan@intel.com>,
Mathias Nyman <mathias.nyman@linux.intel.com>,
Alan Stern <stern@rowland.harvard.edu>
Subject: Re: [PATCH v3 1/4] xhci: Add host support for eUSB2 double isochronous bandwidth devices
Date: Thu, 7 Aug 2025 16:25:05 +0100 [thread overview]
Message-ID: <2025080747-stays-snuff-86cc@gregkh> (raw)
In-Reply-To: <20250807055355.1257029-2-sakari.ailus@linux.intel.com>
On Thu, Aug 07, 2025 at 08:53:52AM +0300, Sakari Ailus wrote:
> From: "Rai, Amardeep" <amardeep.rai@intel.com>
>
> Detect eUSB2 double isoc bw capable hosts and devices, and set the proper
> xhci endpoint context values such as 'Mult', 'Max Burst Size', and 'Max
> ESIT Payload' to enable the double isochronous bandwidth endpoints.
>
> Intel xHC uses the endpoint context 'Mult' field for eUSB2 isoc
> endpoints even if hosts supporting Large ESIT Payload Capability should
> normally ignore the mult field.
>
> Signed-off-by: Rai, Amardeep <amardeep.rai@intel.com>
> Co-developed-by: Kannappan R <r.kannappan@intel.com>
> Signed-off-by: Kannappan R <r.kannappan@intel.com>
> Reviewed-by: Sakari Ailus <sakari.ailus@linux.intel.com>
> Co-developed-by: Mathias Nyman <mathias.nyman@linux.intel.com>
> Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
> Co-developed-by: Sakari Ailus <sakari.ailus@linux.intel.com>
> Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
> ---
> drivers/usb/host/xhci-caps.h | 2 ++
> drivers/usb/host/xhci-mem.c | 60 ++++++++++++++++++++++++++++--------
> drivers/usb/host/xhci-ring.c | 6 ++--
> drivers/usb/host/xhci.c | 16 +++++++++-
> drivers/usb/host/xhci.h | 19 ++++++++++++
> 5 files changed, 87 insertions(+), 16 deletions(-)
>
> diff --git a/drivers/usb/host/xhci-caps.h b/drivers/usb/host/xhci-caps.h
> index 4b8ff4815644..723a56052439 100644
> --- a/drivers/usb/host/xhci-caps.h
> +++ b/drivers/usb/host/xhci-caps.h
> @@ -89,3 +89,5 @@
> #define HCC2_GSC(p) ((p) & (1 << 8))
> /* true: HC support Virtualization Based Trusted I/O Capability */
> #define HCC2_VTC(p) ((p) & (1 << 9))
> +/* true: HC support Double BW on a eUSB2 HS ISOC EP */
> +#define HCC2_EUSB2_DIC(p) ((p) & (1 << 11))
Why tabs when the ones above it were not using tabs?
next prev parent reply other threads:[~2025-08-07 15:25 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-08-07 5:53 [PATCH v3 0/4] eUSB2 Double Isochronous IN Bandwidth support Sakari Ailus
2025-08-07 5:53 ` [PATCH v3 1/4] xhci: Add host support for eUSB2 double isochronous bandwidth devices Sakari Ailus
2025-08-07 15:25 ` Greg KH [this message]
2025-08-08 7:55 ` Sakari Ailus
2025-08-07 5:53 ` [PATCH v3 2/4] USB: core: support eUSB2 double bandwidth large isoc URB frames Sakari Ailus
2025-08-07 15:20 ` Alan Stern
2025-08-07 5:53 ` [PATCH v3 3/4] USB: Add a function to obtain USB version independent maximum bpi value Sakari Ailus
2025-08-07 15:19 ` Alan Stern
2025-08-08 8:18 ` Sakari Ailus
2025-08-08 15:16 ` Alan Stern
2025-08-12 6:15 ` Sakari Ailus
2025-08-07 5:53 ` [PATCH v3 4/4] media: uvcvideo: eUSB2 double isochronous bandwidth support Sakari Ailus
2025-08-07 6:38 ` Ricardo Ribalda
2025-08-07 13:15 ` Laurent Pinchart
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