From: Krzysztof Kozlowski <krzk@kernel.org>
To: Can Guo <can.guo@oss.qualcomm.com>
Cc: bvanassche@acm.org, beanhuo@micron.com, peter.wang@mediatek.com,
martin.petersen@oracle.com, mani@kernel.org,
linux-scsi@vger.kernel.org,
Alim Akhtar <alim.akhtar@samsung.com>,
Avri Altman <avri.altman@wdc.com>, Rob Herring <robh@kernel.org>,
Krzysztof Kozlowski <krzk+dt@kernel.org>,
Conor Dooley <conor+dt@kernel.org>,
Zhaoming Luo <zhml@posteo.com>,
Ram Kumar Dwivedi <quic_rdwivedi@quicinc.com>,
"open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS"
<devicetree@vger.kernel.org>,
open list <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 1/2] dt-bindings: ufs: Document static TX Equalization settings properties
Date: Sat, 30 May 2026 13:36:35 +0200 [thread overview]
Message-ID: <20260530-invisible-pygmy-beetle-57e659@quoll> (raw)
In-Reply-To: <20260527144055.2758170-2-can.guo@oss.qualcomm.com>
On Wed, May 27, 2026 at 07:40:54AM -0700, Can Guo wrote:
> UFS v5.0/UFSHCI v5.0 add HS-G6 support (46.6 Gbps/lane) via UniPro v3.0
> and M-PHY v6.0. In these specs, TX Equalization is defined for all High
> Speed Gears (not only HS-G6) to compensate channel loss and improve signal
> integrity at high speed operation.
>
> For HS-G6, M-PHY uses PAM4 1b1b line coding, Pre-Coding may also be
> required depending on channel characteristics.
>
> Add vendor-neutral DT properties:
>
> - patternProperties for txeq-preshoot-g[1-6] and txeq-deemphasis-g[1-6]
> - fixed property tx-precode-enable-g6
>
> Each property is a uint32 array of per-lane tuples:
> <Host_Lane0 Device_Lane0>, [<Host_Lane1 Device_Lane1>]
>
> Accept 2 or 4 values (x1/x2 lane configs). PreShoot and DeEmphasis values
> are 0..7. Precode enable values are 0/1 and only applicable to HS-G6.
>
Why are they SIX versions within three days? I see this for the third
time in Patchwork already.
Best regards,
Krzysztof
next prev parent reply other threads:[~2026-05-30 11:36 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20260527144055.2758170-1-can.guo@oss.qualcomm.com>
2026-05-27 14:40 ` [PATCH 1/2] dt-bindings: ufs: Document static TX Equalization settings properties Can Guo
2026-05-28 6:18 ` Manivannan Sadhasivam
2026-05-30 11:36 ` Krzysztof Kozlowski [this message]
[not found] <20260501134418.863432-1-can.guo@oss.qualcomm.com>
2026-05-01 13:44 ` Can Guo
2026-05-01 17:02 ` Conor Dooley
2026-05-02 9:30 ` Can Guo
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