linux-kernel - [PATCH 0/3] usb: dwc2: fill in gadget caps, configure it for stm32mp15

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Message-ID: <1631692473-8732-1-git-send-email-fabrice.gasnier@foss.st.com>
Date:   Wed, 15 Sep 2021 09:54:30 +0200
From:   Fabrice Gasnier <fabrice.gasnier@...s.st.com>
To:     <hminas@...opsys.com>, <gregkh@...uxfoundation.org>,
        <robh+dt@...nel.org>, <alexandre.torgue@...s.st.com>
CC:     <balbi@...nel.org>, <linux-usb@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>,
        <linux-stm32@...md-mailman.stormreply.com>,
        <devicetree@...r.kernel.org>, <amelie.delaunay@...s.st.com>,
        <fabrice.gasnier@...s.st.com>
Subject: [PATCH 0/3] usb: dwc2: fill in gadget caps, configure it for stm32mp15

This patchset fills in 'otg_caps' of the usb_gadget structure, and configures it
on stm32mp15.

When dwc2 is configured as dual role (OTG), the USB gadget descriptors (device mode)
are configured via configfs. This lead in calling usb_otg_descriptor_init().
In usb_otg_descriptor_init() (drivers/usb/gadget/config.c):
- If otg caps structure is provided -> use it
- If otg caps structure isn't provided -> HNP and SRP are enabled by default

This could lead to a configuration mismatch beetween:
- OTG controller: HNP and SRP aren't enabled
- gadget descriptors: HNP and SRP are advertised

Fabrice Gasnier (3):
  usb: dwc2: add otg_rev and otg_caps information for gadget driver
  usb: dwc2: stm32mp15: set otg_rev
  ARM: dts: stm32: set otg-rev on stm32mp151

 arch/arm/boot/dts/stm32mp151.dtsi |  1 +
 drivers/usb/dwc2/core.h           |  7 +++++++
 drivers/usb/dwc2/gadget.c         |  1 +
 drivers/usb/dwc2/params.c         | 16 ++++++++++++++++
 4 files changed, 25 insertions(+)

-- 
2.7.4