linux-kernel - 回复: [PATCH RFC 02/21] media: cadence: csi2rx: configure DPHY before starting source stream

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID:
 <SHXPR01MB0671EA5450ADAB3F550712D0F255A@SHXPR01MB0671.CHNPR01.prod.partner.outlook.cn>
Date: Fri, 23 Feb 2024 02:46:23 +0000
From: Changhuang Liang <changhuang.liang@...rfivetech.com>
To: Jai Luthra <j-luthra@...com>, Tomi Valkeinen
	<tomi.valkeinen@...asonboard.com>, Mauro Carvalho Chehab
	<mchehab@...nel.org>, Sakari Ailus <sakari.ailus@...ux.intel.com>, Hans
 Verkuil <hverkuil-cisco@...all.nl>, Vaishnav Achath <vaishnav.a@...com>,
	Maxime Ripard <mripard@...nel.org>, Rob Herring <robh@...nel.org>, Krzysztof
 Kozlowski <krzysztof.kozlowski+dt@...aro.org>, Conor Dooley
	<conor+dt@...nel.org>
CC: "linux-media@...r.kernel.org" <linux-media@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>, Vignesh
 Raghavendra <vigneshr@...com>, Aradhya Bhatia <a-bhatia1@...com>, Devarsh
 Thakkar <devarsht@...com>, Jack Zhu <jack.zhu@...rfivetech.com>, Julien
 Massot <julien.massot@...labora.com>, Jayshri Pawar <jpawar@...ence.com>
Subject:
 回复: [PATCH RFC 02/21] media: cadence: csi2rx: configure DPHY before starting source stream

Hi, Jai

> [PATCH RFC 02/21] media: cadence: csi2rx: configure DPHY before
> starting source stream
> 
> From: Pratyush Yadav <p.yadav@...com>
> 
> When the source device is operating above 1.5 Gbps per lane, it needs to send
> the Skew Calibration Sequence before sending any HS data. If the DPHY is
> initialized after the source stream is started, then it might miss the sequence
> and not be able to receive data properly. Move the start of source subdev to
> the end of the sequence to make sure everything is ready to receive data
> before the source starts streaming.
> 
> Signed-off-by: Pratyush Yadav <p.yadav@...com>
> Signed-off-by: Jai Luthra <j-luthra@...com>
> ---

I also tested this patch on StarFive JH7100 CAMSS and it worked fine.

Reviewed-by: Changhuang Liang <Changhuang.liang@...rfivetech.com>
Tested-by: Changhuang Liang <Changhuang.liang@...rfivetech.com>

regards
Changhuang