From: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
To: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>,
martin.petersen@oracle.com, jejb@linux.ibm.com,
andersson@kernel.org, vkoul@kernel.org,
krzysztof.kozlowski+dt@linaro.org
Cc: konrad.dybcio@somainline.org, robh+dt@kernel.org,
quic_cang@quicinc.com, linux-arm-msm@vger.kernel.org,
devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-phy@lists.infradead.org, linux-scsi@vger.kernel.org,
dmitry.baryshkov@linaro.org, ahalaney@redhat.com
Subject: Re: [PATCH v2 06/15] dt-bindings: ufs: Add "max-device-gear" property for UFS device
Date: Wed, 2 Nov 2022 15:09:50 -0400 [thread overview]
Message-ID: <1fe8fd96-7770-0bda-c970-aa38d030ff3b@linaro.org> (raw)
In-Reply-To: <20221031180217.32512-7-manivannan.sadhasivam@linaro.org>
On 31/10/2022 14:02, Manivannan Sadhasivam wrote:
> The maximum gear supported by the UFS device can be specified using the
> "max-device-gear" property. This allows the UFS controller to configure the
> TX/RX gear before starting communication with the UFS device.
This is confusing. The UFS PHY provides gear capability, so what is the
"device" here? The attached memory? How could it report something else
than phy?
The last sentence also suggests that you statically encode gear to avoid
runtime negotiation.
Best regards,
Krzysztof
WARNING: multiple messages have this Message-ID (diff)
From: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
To: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>,
martin.petersen@oracle.com, jejb@linux.ibm.com,
andersson@kernel.org, vkoul@kernel.org,
krzysztof.kozlowski+dt@linaro.org
Cc: konrad.dybcio@somainline.org, robh+dt@kernel.org,
quic_cang@quicinc.com, linux-arm-msm@vger.kernel.org,
devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-phy@lists.infradead.org, linux-scsi@vger.kernel.org,
dmitry.baryshkov@linaro.org, ahalaney@redhat.com
Subject: Re: [PATCH v2 06/15] dt-bindings: ufs: Add "max-device-gear" property for UFS device
Date: Wed, 2 Nov 2022 15:09:50 -0400 [thread overview]
Message-ID: <1fe8fd96-7770-0bda-c970-aa38d030ff3b@linaro.org> (raw)
In-Reply-To: <20221031180217.32512-7-manivannan.sadhasivam@linaro.org>
On 31/10/2022 14:02, Manivannan Sadhasivam wrote:
> The maximum gear supported by the UFS device can be specified using the
> "max-device-gear" property. This allows the UFS controller to configure the
> TX/RX gear before starting communication with the UFS device.
This is confusing. The UFS PHY provides gear capability, so what is the
"device" here? The attached memory? How could it report something else
than phy?
The last sentence also suggests that you statically encode gear to avoid
runtime negotiation.
Best regards,
Krzysztof
--
linux-phy mailing list
linux-phy@lists.infradead.org
https://lists.infradead.org/mailman/listinfo/linux-phy
next prev parent reply other threads:[~2022-11-02 19:10 UTC|newest]
Thread overview: 58+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-10-31 18:02 [PATCH v2 00/15] ufs: qcom: Add HS-G4 support Manivannan Sadhasivam
2022-10-31 18:02 ` Manivannan Sadhasivam
2022-10-31 18:02 ` [PATCH v2 01/15] phy: qcom-qmp-ufs: Move register settings to qmp_phy_cfg_tables struct Manivannan Sadhasivam
2022-10-31 18:02 ` Manivannan Sadhasivam
2022-11-11 6:57 ` Vinod Koul
2022-11-11 6:57 ` Vinod Koul
2022-10-31 18:02 ` [PATCH v2 02/15] phy: qcom-qmp-ufs: Add support for configuring PHY in HS Series B mode Manivannan Sadhasivam
2022-10-31 18:02 ` Manivannan Sadhasivam
2022-11-11 7:01 ` Vinod Koul
2022-11-11 7:01 ` Vinod Koul
2022-11-22 16:21 ` Manivannan Sadhasivam
2022-11-22 16:21 ` Manivannan Sadhasivam
2022-10-31 18:02 ` [PATCH v2 03/15] phy: qcom-qmp-ufs: Add support for configuring PHY in HS G4 mode Manivannan Sadhasivam
2022-10-31 18:02 ` Manivannan Sadhasivam
2022-10-31 18:02 ` [PATCH v2 04/15] phy: qcom-qmp-ufs: Add HS G4 mode support to SM8250 SoC Manivannan Sadhasivam
2022-10-31 18:02 ` Manivannan Sadhasivam
2022-10-31 18:02 ` [PATCH v2 05/15] phy: qcom-qmp-ufs: Move HS Rate B register setting to tables_hs_b Manivannan Sadhasivam
2022-10-31 18:02 ` Manivannan Sadhasivam
2022-10-31 18:02 ` [PATCH v2 06/15] dt-bindings: ufs: Add "max-device-gear" property for UFS device Manivannan Sadhasivam
2022-10-31 18:02 ` Manivannan Sadhasivam
2022-11-02 16:29 ` Rob Herring
2022-11-02 16:29 ` Rob Herring
2022-11-02 19:09 ` Krzysztof Kozlowski [this message]
2022-11-02 19:09 ` Krzysztof Kozlowski
2022-11-03 12:28 ` Manivannan Sadhasivam
2022-11-03 12:28 ` Manivannan Sadhasivam
2022-11-03 15:23 ` Krzysztof Kozlowski
2022-11-03 15:23 ` Krzysztof Kozlowski
2022-11-22 16:22 ` Manivannan Sadhasivam
2022-11-22 16:22 ` Manivannan Sadhasivam
2022-10-31 18:02 ` [PATCH v2 07/15] arm64: dts: qcom: qrb5165-rb5: Add max-device-gear property to UFS node Manivannan Sadhasivam
2022-10-31 18:02 ` Manivannan Sadhasivam
2022-10-31 18:02 ` [PATCH v2 08/15] scsi: ufs: ufs-qcom: Remove un-necessary goto statements Manivannan Sadhasivam
2022-10-31 18:02 ` Manivannan Sadhasivam
2022-10-31 18:02 ` [PATCH v2 09/15] scsi: ufs: ufs-qcom: Remove un-necessary WARN_ON() Manivannan Sadhasivam
2022-10-31 18:02 ` Manivannan Sadhasivam
2022-10-31 20:01 ` Andrew Halaney
2022-10-31 20:01 ` Andrew Halaney
2022-10-31 18:02 ` [PATCH v2 10/15] scsi: ufs: ufs-qcom: Use bitfields where appropriate Manivannan Sadhasivam
2022-10-31 18:02 ` Manivannan Sadhasivam
2022-10-31 18:02 ` [PATCH v2 11/15] scsi: ufs: ufs-qcom: Use dev_err_probe() for printing probe error Manivannan Sadhasivam
2022-10-31 18:02 ` Manivannan Sadhasivam
2022-10-31 20:05 ` Andrew Halaney
2022-10-31 20:05 ` Andrew Halaney
2022-10-31 18:02 ` [PATCH v2 12/15] scsi: ufs: ufs-qcom: Fix the Qcom register name for offset 0xD0 Manivannan Sadhasivam
2022-10-31 18:02 ` Manivannan Sadhasivam
2022-11-01 15:12 ` Andrew Halaney
2022-11-01 15:12 ` Andrew Halaney
2022-10-31 18:02 ` [PATCH v2 13/15] scsi: ufs: ufs-qcom: Factor out the logic finding the HS Gear Manivannan Sadhasivam
2022-10-31 18:02 ` Manivannan Sadhasivam
2022-10-31 20:31 ` Andrew Halaney
2022-10-31 20:31 ` Andrew Halaney
2022-10-31 18:02 ` [PATCH v2 14/15] scsi: ufs: ufs-qcom: Add support for finding HS gear on new UFS versions Manivannan Sadhasivam
2022-10-31 18:02 ` Manivannan Sadhasivam
2022-10-31 20:52 ` Andrew Halaney
2022-10-31 20:52 ` Andrew Halaney
2022-10-31 18:02 ` [PATCH v2 15/15] MAINTAINERS: Add myself as the maintainer for Qcom UFS driver Manivannan Sadhasivam
2022-10-31 18:02 ` Manivannan Sadhasivam
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