From: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
To: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Rob Herring <robh@kernel.org>,
Krzysztof Kozlowski <krzk+dt@kernel.org>,
Conor Dooley <conor+dt@kernel.org>,
Wesley Cheng <quic_wcheng@quicinc.com>,
Vinod Koul <vkoul@kernel.org>,
Neil Armstrong <neil.armstrong@linaro.org>,
Christian Marangi <ansuelsmth@gmail.com>,
Andy Gross <agross@codeaurora.org>,
Bjorn Andersson <andersson@kernel.org>,
Konrad Dybcio <konradybcio@kernel.org>
Cc: linux-arm-msm@vger.kernel.org, linux-usb@vger.kernel.org,
devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-phy@lists.infradead.org
Subject: Re: [PATCH 10/10] ARM: dts: qcom: apq8074-dragonboard: enable the USB3 host
Date: Tue, 18 Aug 2026 11:06:47 +0200 [thread overview]
Message-ID: <dc555512-3161-4c4b-975a-7ec60a8f1a48@oss.qualcomm.com> (raw)
In-Reply-To: <20260810-msm8974-usb3-v1-10-1a47e1185524@oss.qualcomm.com>
On 8/10/26 1:42 PM, Dmitry Baryshkov wrote:
> The USB3 port of the dragonboard drives the onboard TUSB8040A hub with
> the AX88179 GbE controller and the PL2775 USB-SATA bridge behind it,
> but the controller is disabled and nothing describes the devices, so
> their reset lines float and their supplies are unmanaged.
>
> Enable the DWC3 controller in host mode together with both of its
> PHYs, and describe the onboard chain as device nodes under the
> controller: the TUSB8040A hub pair (with the EEPROM-programmed
> 0451:8041/0451:8043 IDs this board reports), the AX88179 on the DN2
> port and the PL2775 on the DN0 port, each with its PM8941 reset GPIO,
> all powered from the always-on 3.3V carrier board rail, modeled as a
> fixed regulator.
>
> The SuperSpeed PHY is required even for the hub's USB 2.0 half to
> respond: with the SS PHY left uninitialized the hub connects but never
> answers enumeration at any speed.
>
> Assisted-by: Claude:claude-fable-5
> Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
> ---
Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Konrad
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WARNING: multiple messages have this Message-ID (diff)
From: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
To: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Rob Herring <robh@kernel.org>,
Krzysztof Kozlowski <krzk+dt@kernel.org>,
Conor Dooley <conor+dt@kernel.org>,
Wesley Cheng <quic_wcheng@quicinc.com>,
Vinod Koul <vkoul@kernel.org>,
Neil Armstrong <neil.armstrong@linaro.org>,
Christian Marangi <ansuelsmth@gmail.com>,
Andy Gross <agross@codeaurora.org>,
Bjorn Andersson <andersson@kernel.org>,
Konrad Dybcio <konradybcio@kernel.org>
Cc: linux-arm-msm@vger.kernel.org, linux-usb@vger.kernel.org,
devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-phy@lists.infradead.org
Subject: Re: [PATCH 10/10] ARM: dts: qcom: apq8074-dragonboard: enable the USB3 host
Date: Tue, 18 Aug 2026 11:06:47 +0200 [thread overview]
Message-ID: <dc555512-3161-4c4b-975a-7ec60a8f1a48@oss.qualcomm.com> (raw)
In-Reply-To: <20260810-msm8974-usb3-v1-10-1a47e1185524@oss.qualcomm.com>
On 8/10/26 1:42 PM, Dmitry Baryshkov wrote:
> The USB3 port of the dragonboard drives the onboard TUSB8040A hub with
> the AX88179 GbE controller and the PL2775 USB-SATA bridge behind it,
> but the controller is disabled and nothing describes the devices, so
> their reset lines float and their supplies are unmanaged.
>
> Enable the DWC3 controller in host mode together with both of its
> PHYs, and describe the onboard chain as device nodes under the
> controller: the TUSB8040A hub pair (with the EEPROM-programmed
> 0451:8041/0451:8043 IDs this board reports), the AX88179 on the DN2
> port and the PL2775 on the DN0 port, each with its PM8941 reset GPIO,
> all powered from the always-on 3.3V carrier board rail, modeled as a
> fixed regulator.
>
> The SuperSpeed PHY is required even for the hub's USB 2.0 half to
> respond: with the SS PHY left uninitialized the hub connects but never
> answers enumeration at any speed.
>
> Assisted-by: Claude:claude-fable-5
> Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
> ---
Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Konrad
next prev parent reply other threads:[~2026-08-18 9:06 UTC|newest]
Thread overview: 60+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-08-10 11:42 [PATCH 00/10] ARM: qcom: enable USB3 (DWC3) controller on MSM8974 platform Dmitry Baryshkov
2026-08-10 11:42 ` Dmitry Baryshkov
2026-08-10 11:42 ` [PATCH 01/10] dt-bindings: usb: qcom,snps-dwc3: document the MSM8974 controller Dmitry Baryshkov
2026-08-10 11:42 ` Dmitry Baryshkov
2026-08-20 6:24 ` Krzysztof Kozlowski
2026-08-20 6:24 ` Krzysztof Kozlowski
2026-08-10 11:42 ` [PATCH 02/10] dt-bindings: phy: qcom,ipq806x-usb-phy-hs: document the MSM8974 HS PHY Dmitry Baryshkov
2026-08-10 11:42 ` Dmitry Baryshkov
2026-08-20 6:28 ` Krzysztof Kozlowski
2026-08-20 6:28 ` Krzysztof Kozlowski
2026-08-10 11:42 ` [PATCH 03/10] dt-bindings: phy: qcom,ipq806x-usb-phy-ss: add MSM8974 SS PHY Dmitry Baryshkov
2026-08-10 11:42 ` Dmitry Baryshkov
2026-08-10 11:54 ` sashiko-bot
2026-08-10 11:54 ` sashiko-bot
2026-08-10 13:05 ` Rob Herring (Arm)
2026-08-10 13:05 ` Rob Herring (Arm)
2026-08-20 6:31 ` Krzysztof Kozlowski
2026-08-20 6:31 ` Krzysztof Kozlowski
2026-08-10 11:42 ` [PATCH 04/10] phy: qcom-ipq806x-usb: add MSM8974 HS PHY support Dmitry Baryshkov
2026-08-10 11:42 ` Dmitry Baryshkov
2026-08-10 11:51 ` sashiko-bot
2026-08-10 11:51 ` sashiko-bot
2026-08-18 8:55 ` Konrad Dybcio
2026-08-18 8:55 ` Konrad Dybcio
2026-08-10 11:42 ` [PATCH 05/10] phy: qcom-ipq806x-usb: fix the SS PHY TEST_POWERDOWN bit Dmitry Baryshkov
2026-08-10 11:42 ` Dmitry Baryshkov
2026-08-10 11:53 ` sashiko-bot
2026-08-10 11:53 ` sashiko-bot
2026-08-18 8:57 ` Konrad Dybcio
2026-08-18 8:57 ` Konrad Dybcio
2026-08-10 11:42 ` [PATCH 06/10] phy: qcom-ipq806x-usb: fix the PHY_PARAM_CTRL1 field masks Dmitry Baryshkov
2026-08-10 11:42 ` Dmitry Baryshkov
2026-08-10 11:57 ` sashiko-bot
2026-08-10 11:57 ` sashiko-bot
2026-08-18 8:59 ` Konrad Dybcio
2026-08-18 8:59 ` Konrad Dybcio
2026-08-10 11:42 ` [PATCH 07/10] phy: qcom-ipq806x-usb: parse the tx-deamp-3_5db property as documented Dmitry Baryshkov
2026-08-10 11:42 ` Dmitry Baryshkov
2026-08-10 11:49 ` sashiko-bot
2026-08-10 11:49 ` sashiko-bot
2026-08-18 9:00 ` Konrad Dybcio
2026-08-18 9:00 ` Konrad Dybcio
2026-08-10 11:42 ` [PATCH 08/10] phy: qcom-ipq806x-usb: support the MSM8974 SS PHY parameters Dmitry Baryshkov
2026-08-10 11:42 ` Dmitry Baryshkov
2026-08-10 11:56 ` sashiko-bot
2026-08-10 11:56 ` sashiko-bot
2026-08-18 9:01 ` Konrad Dybcio
2026-08-18 9:01 ` Konrad Dybcio
2026-08-10 11:42 ` [PATCH 09/10] ARM: dts: qcom: msm8974: add the USB3 controller and its PHYs Dmitry Baryshkov
2026-08-10 11:42 ` Dmitry Baryshkov
2026-08-10 12:04 ` sashiko-bot
2026-08-10 12:04 ` sashiko-bot
2026-08-18 9:05 ` Konrad Dybcio
2026-08-18 9:05 ` Konrad Dybcio
2026-08-10 11:42 ` [PATCH 10/10] ARM: dts: qcom: apq8074-dragonboard: enable the USB3 host Dmitry Baryshkov
2026-08-10 11:42 ` Dmitry Baryshkov
2026-08-10 12:07 ` sashiko-bot
2026-08-10 12:07 ` sashiko-bot
2026-08-18 9:06 ` Konrad Dybcio [this message]
2026-08-18 9:06 ` Konrad Dybcio
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