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[139.181.7.34]) by smtp.gmail.com with ESMTPSA id j20sm15557792wre.65.2019.08.12.14.39.47 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 12 Aug 2019 14:39:48 -0700 (PDT) Subject: Re: [PATCH] media: docs-rst: Clarify duration of LP-11 mode To: Ian Arkver , linux-media@vger.kernel.org Cc: Sakari Ailus , Mauro Carvalho Chehab , open list References: <20190811173621.20454-1-slongerbeam@gmail.com> <3f31cde6-8faf-f9a0-626e-dc995260a640@gmail.com> From: Steve Longerbeam Message-ID: <2a84063e-b66f-bef2-1277-3514566aa236@gmail.com> Date: Mon, 12 Aug 2019 14:39:45 -0700 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.8.0 MIME-Version: 1.0 In-Reply-To: <3f31cde6-8faf-f9a0-626e-dc995260a640@gmail.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 8bit Content-Language: en-US Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org Hi Ian, On 8/12/19 1:53 AM, Ian Arkver wrote: > Hi Steve, > > On 11/08/2019 18:36, Steve Longerbeam wrote: >> Add a sentence that makes it more clear when the CSI-2 transmitter >> must, if possible, exit LP-11 mode. That is, maintain LP-11 mode >> until stream on, at which point the transmitter activates the clock >> lane and transition to HS mode. >> >> Signed-off-by: Steve Longerbeam >> --- >>   Documentation/media/kapi/csi2.rst | 10 +++++++--- >>   1 file changed, 7 insertions(+), 3 deletions(-) >> >> diff --git a/Documentation/media/kapi/csi2.rst >> b/Documentation/media/kapi/csi2.rst >> index a7e75e2eba85..6cd1d4b0df17 100644 >> --- a/Documentation/media/kapi/csi2.rst >> +++ b/Documentation/media/kapi/csi2.rst >> @@ -49,9 +49,13 @@ where >>     The transmitter drivers must, if possible, configure the CSI-2 >>   transmitter to *LP-11 mode* whenever the transmitter is powered on but >> -not active. Some transmitters do this automatically but some have to >> -be explicitly programmed to do so, and some are unable to do so >> -altogether due to hardware constraints. >> +not active, and maintain *LP-11 mode* until stream on. Only until > > s/until/at/ perhaps? Sure, that's a bit better language. Steve > > Regards, > Ian >> +stream on should the transmitter activate the clock on the clock lane >> +and transition to *HS mode*. >> + >> +Some transmitters do this automatically but some have to be explicitly >> +programmed to do so, and some are unable to do so altogether due to >> +hardware constraints. >>     Stopping the transmitter >>   ^^^^^^^^^^^^^^^^^^^^^^^^ >>