From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.6 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 963F0C0650F for ; Sun, 11 Aug 2019 17:36:30 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 654D32054F for ; Sun, 11 Aug 2019 17:36:30 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="sFDxlNF7" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1725888AbfHKRg3 (ORCPT ); Sun, 11 Aug 2019 13:36:29 -0400 Received: from mail-pf1-f196.google.com ([209.85.210.196]:39405 "EHLO mail-pf1-f196.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725730AbfHKRg3 (ORCPT ); Sun, 11 Aug 2019 13:36:29 -0400 Received: by mail-pf1-f196.google.com with SMTP id f17so44596035pfn.6; Sun, 11 Aug 2019 10:36:29 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id; bh=x7Dw46zWLl+eoDZ/eEPovBwW+lbl5NQPMvw6CLb6yg0=; b=sFDxlNF7ppdNxSzm62m+8U3PDslIJreRkZzC3qkugzRe+OhrFp+V7DfRuvtJlT6Wd/ QkCUV3MqOShsCbY3TyAtHYGVmGi1nFswvQEVSDQd+qoFXRtoGSjx3OTX2lKopjNc5nz+ wrJ9whyMS4L/v2fMXoG3hykmkc5efUIgM5uvSwYF1ILWkVs6TabD0tPpavirK9+kS9bH c6DIUt/jTlW+ZznDyEfdeKVRwIKHRky9NqroDS+/L5e6Ji9CCPwPJmlBJNhw2Oo8DEoJ 2s3d6Gy6oGvcp6GzDgPj/LnAd75XDT1+sLrG/VWkW6YLA/6U2iOsExydwuRSDvvswQ23 6PtA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id; bh=x7Dw46zWLl+eoDZ/eEPovBwW+lbl5NQPMvw6CLb6yg0=; b=qWWcQFlT7IpCNfxd3jOwlwEZCl+DP91VhUDvKoC8fy+MtXQc6Uyp6q5ITr9J3tYJHf +sR1fLIrPLNn+M2C63JujO1pcP/zRiEz+mZ0NfIcbi2c5L7EykENW1EC8Kv+ThbWrFQU S/B8q0U8gNTRnCM+S69KjfJC4k2zQv6Rw+w1PF2yMdblP1rYXFe5CtRLmTeRieIvpAIb iBaSgQ82W79CRuel5ykNt8CEgjoFRmu6+AlzhTASA7c3mxA3sn6696D8SpdnKuu+H2gO N4UXRDlO6OjKjmrWbkU8Af61KJFf02+5v6QA7d0bhKPzogj0PF9jgor7I0bsItXVaqo0 VflA== X-Gm-Message-State: APjAAAWIaMbQqXH2d16PP5wBBqjoxVJeeYxs5gALlFYBfODjj/7SXfhK W+xKlciRNagYkSyVPr9jAwFEv3q4 X-Google-Smtp-Source: APXvYqwEZAfi1eB+HQg3sPLyTnYSLhGzyPyS+uMNi8vhskM0Jl9DXYHWnmvnWrXvrzrwhvdlTHVjZw== X-Received: by 2002:a17:90a:a46:: with SMTP id o64mr1954968pjo.90.1565544988573; Sun, 11 Aug 2019 10:36:28 -0700 (PDT) Received: from mappy.sklembedded.com (c-73-202-231-77.hsd1.ca.comcast.net. [73.202.231.77]) by smtp.gmail.com with ESMTPSA id u23sm24074089pgj.58.2019.08.11.10.36.27 (version=TLS1_3 cipher=AEAD-AES256-GCM-SHA384 bits=256/256); Sun, 11 Aug 2019 10:36:27 -0700 (PDT) From: Steve Longerbeam To: linux-media@vger.kernel.org Cc: Sakari Ailus , Steve Longerbeam , Mauro Carvalho Chehab , linux-kernel@vger.kernel.org (open list) Subject: [PATCH] media: docs-rst: Clarify duration of LP-11 mode Date: Sun, 11 Aug 2019 10:36:20 -0700 Message-Id: <20190811173621.20454-1-slongerbeam@gmail.com> X-Mailer: git-send-email 2.17.1 Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org 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 +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 ^^^^^^^^^^^^^^^^^^^^^^^^ -- 2.17.1