From: Krzysztof Kozlowski <krzk@kernel.org>
To: Manivannan Sadhasivam <mani@kernel.org>
Cc: Nitin Rawat <quic_nitirawa@quicinc.com>,
Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>,
Alim Akhtar <alim.akhtar@samsung.com>,
Avri Altman <avri.altman@wdc.com>,
Bart Van Assche <bvanassche@acm.org>,
Rob Herring <robh@kernel.org>,
Krzysztof Kozlowski <krzk+dt@kernel.org>,
Conor Dooley <conor+dt@kernel.org>,
Bjorn Andersson <andersson@kernel.org>,
Andy Gross <agross@kernel.org>,
linux-arm-msm@vger.kernel.org, linux-scsi@vger.kernel.org,
devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
Ram Kumar Dwivedi <quic_rdwivedi@quicinc.com>
Subject: Re: [PATCH 0/2] dt-bindings: ufs: qcom: Split SC7280 and similar into separate file
Date: Thu, 31 Jul 2025 16:53:41 +0200 [thread overview]
Message-ID: <a8eb1574-39f2-4b71-b6be-bb28b43eb6f8@kernel.org> (raw)
In-Reply-To: <qemlydifa7u3zwrjnnp7umjsprjrje27ghzghyyoutufeyiimn@g2ejdt72opz3>
On 31/07/2025 16:09, Manivannan Sadhasivam wrote:
> On Thu, Jul 31, 2025 at 09:04:48AM GMT, Krzysztof Kozlowski wrote:
>> On 31/07/2025 08:59, Nitin Rawat wrote:
>>>> Hm?
>>>>
>>>>>
>>>>> For reference, only SM8650 and SM8750 currently support MCQ, though more
>>>>> targets may be added later.
>>>>
>>>> Are you sure? Are you claiming that SM8550 hardware does not support MCQ?
>>>
>>> Offcourse I can say that because I am working on Qualcomm UFS Driver.
>>
>> Qualcomm sent many patches which were not related to hardware at all,
>> just based on drivers, so my question is completely valid based on
>> previous experience with Qualcomm.
>>
>
> SM8550 indeed doesn't support MCQ. Even though it is based on UFSHCD 4.x, it
> doesn't support MCQ due to hardware design. MCQ support only starts from SM8650.
Yeah, I checked later in datasheets and programming guide. That's why I
sent v2 and marked it in Patchwork as changes-requested.
Best regards,
Krzysztof
prev parent reply other threads:[~2025-07-31 14:53 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-07-30 12:35 [PATCH 0/2] dt-bindings: ufs: qcom: Split SC7280 and similar into separate file Krzysztof Kozlowski
2025-07-30 12:35 ` [PATCH 1/2] dt-bindings: ufs: qcom: Split common part to qcom,ufs-common.yaml Krzysztof Kozlowski
2025-07-30 12:35 ` [PATCH 2/2] dt-bindings: ufs: qcom: Split SC7280 and similar Krzysztof Kozlowski
2025-07-30 13:53 ` [PATCH 0/2] dt-bindings: ufs: qcom: Split SC7280 and similar into separate file Nitin Rawat
2025-07-30 14:25 ` Krzysztof Kozlowski
2025-07-31 6:55 ` Krzysztof Kozlowski
2025-07-31 8:39 ` Ram Kumar Dwivedi
2025-07-31 6:59 ` Nitin Rawat
2025-07-31 7:04 ` Krzysztof Kozlowski
2025-07-31 14:09 ` Manivannan Sadhasivam
2025-07-31 14:53 ` Krzysztof Kozlowski [this message]
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