linux-kernel - [PATCH v1 0/3] usb: dwc3: Avoid using reserved EPs

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Message-ID: <20250116154117.148915-1-andriy.shevchenko@linux.intel.com>
Date: Thu, 16 Jan 2025 17:40:45 +0200
From: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Thinh Nguyen <Thinh.Nguyen@...opsys.com>,
	Felipe Balbi <balbi@...nel.org>,
	linux-usb@...r.kernel.org,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org
Cc: Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Ferry Toth <fntoth@...il.com>,
	Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Subject: [PATCH v1 0/3] usb: dwc3: Avoid using reserved EPs

On some platforms (Intel-based and AFAIK ARM-based) the EPs in the gadget
(USB Device Controller mode) may be reserved for some special means, such as
tracing. This series extends DT schema and driver to avoid using those.
Without this the USB gadget mode won't work properly (those devices that
"luckily" allocated the reserved EPs).

Ferry already tested the privately sent PoC of this, but I ask him again to
re-test this version which is slightly different.

Andy Shevchenko (3):
  dt-bindings: usb: dwc3: Add a property to reserve endpoints
  usb: dwc3: gadget: Add support for snps,reserved-endpoints property
  usb: dwc3: gadget: Skip endpoints ep[18]{in,out} on Intel Merrifield

 .../devicetree/bindings/usb/snps,dwc3.yaml    | 10 +++++
 drivers/usb/dwc3/dwc3-pci.c                   |  9 +++++
 drivers/usb/dwc3/gadget.c                     | 38 ++++++++++++++++++-
 3 files changed, 56 insertions(+), 1 deletion(-)

-- 
2.43.0.rc1.1336.g36b5255a03ac