From patchwork Wed Jan 11 08:52:37 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yunke Cao X-Patchwork-Id: 88697 Received: from vger.kernel.org ([23.128.96.18]) by www.linuxtv.org with esmtp (Exim 4.92) (envelope-from ) id 1pFWqs-00Esot-IT; Wed, 11 Jan 2023 08:52:58 +0000 Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235720AbjAKIww (ORCPT + 1 other); Wed, 11 Jan 2023 03:52:52 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59990 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232077AbjAKIwr (ORCPT ); Wed, 11 Jan 2023 03:52:47 -0500 Received: from mail-pl1-x636.google.com (mail-pl1-x636.google.com [IPv6:2607:f8b0:4864:20::636]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 94C63101CF for ; Wed, 11 Jan 2023 00:52:42 -0800 (PST) Received: by mail-pl1-x636.google.com with SMTP id 17so16126497pll.0 for ; Wed, 11 Jan 2023 00:52:42 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=cc:to:message-id:date:from:content-transfer-encoding:mime-version :subject:from:to:cc:subject:date:message-id:reply-to; bh=wqCK+F3NQ/WGaXLcIcOMDouMxXDEFoEvg+1KtOppxeY=; b=DTcmeYWP40XvxuO4qpiqRHULNmiwo8+64irQJ7KINs7kMqbXY7UXrX2RP+lHjFwfuY IrrfYTghgFE/AvAVNXFpoBYXjbN52LGaYNTGAqg57PmydTAcbhGbRH/zsJnQJm+hMUcm Cz4ukJygPdmAJKtFSQri5BZi7CViCGCx0nwqY= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=cc:to:message-id:date:from:content-transfer-encoding:mime-version :subject:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=wqCK+F3NQ/WGaXLcIcOMDouMxXDEFoEvg+1KtOppxeY=; b=QJyBnJM/RzeypdOkQiS7vkvjn3vT3D5U9vJfrwApRz3vK7KoYHGwzY1w8K0jSHdrUY FEhbw5IjzHH2MCRnq3YCbVZV1e2DlT8GKZd6tPVLMIA0AWoHNA9a85+dNcw1unTNbjwz bo1q3gQVgxagb6IvTXBk7J1yRhOY0ohLuVD3Qxg5Wghv7LW4YexdkfBpND+6m8HicLLg 77kz28mpqSWSoqpPF1KVeKQTl+mrEWxqXSIwERy8BUat3a/aAiWFxqIBn3pQv09SaNFU rmQfEfBnUBtVVAj6XlFjQDEP0Qtq4tNqmR/jAU2sFyQ+Mze0FwI9ttmxSj2yG6HwZx7/ ZUMw== X-Gm-Message-State: AFqh2kplFZUiDrvtP8vSL1RAOqtwddm45SSB3sqP3eGsIwSRUmijh0d4 K0D0fc+OlSOx6V56JaWqOjETLg== X-Google-Smtp-Source: AMrXdXum8ArM4pB9qETHPJODnPDp/suBqyLyoixncGVjhBx1UAuymc1r+iaUvuZWqudNJObqgHXXLA== X-Received: by 2002:a05:6a20:1384:b0:af:864d:e7bc with SMTP id w4-20020a056a20138400b000af864de7bcmr103740756pzh.25.1673427162145; Wed, 11 Jan 2023 00:52:42 -0800 (PST) Received: from yunkec1.tok.corp.google.com ([2401:fa00:8f:203:c84:581:fd3a:b32b]) by smtp.gmail.com with ESMTPSA id ik9-20020a170902ab0900b00183c67844aesm9566612plb.22.2023.01.11.00.52.40 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 11 Jan 2023 00:52:41 -0800 (PST) Subject: [PATCH RFC 0/3] meida: uvcvideo: reimplement privacy gpio as a separate subdevice MIME-Version: 1.0 X-b4-tracking: H4sIANV4vmMC/w3LQQqAMAwEwK9IzhaMgoqfkbQuGpAqDS2I+Hd7nMO8ZEgKo6V5KaGo6RUruG0oHB J3ON2qqe/6oWNml0tY76RFwrNa9huKY0zC44R5hKcavRicTxLDUWvM5/l9PzD2TzRpAAAA From: Yunke Cao Date: Wed, 11 Jan 2023 17:52:37 +0900 Message-Id: <20230111-uvc_privacy_subdev-v1-0-f859ac9a01e3@chromium.org> To: Laurent Pinchart , Mauro Carvalho Chehab , Ricardo Ribalda , Hans Verkuil Cc: Yunke Cao , linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, Sakari Ailus , Ricardo Ribalda X-Mailer: b4 0.11.0-dev-4d321 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, SPF_HELO_NONE,SPF_PASS autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org X-LSpam-Score: -2.5 (--) X-LSpam-Report: No, score=-2.5 required=5.0 tests=BAYES_00=-1.9,DKIMWL_WL_HIGH=0.001,DKIM_SIGNED=0.1,DKIM_VALID=-0.1,DKIM_VALID_AU=-0.1,HEADER_FROM_DIFFERENT_DOMAINS=0.5,MAILING_LIST_MULTI=-1 autolearn=ham autolearn_force=no privacy_gpio in uvc were added as V4L2_CID_PRIVACY in uvc video node in https://lore.kernel.org/all/20201223133528.55014-1-ribalda@chromium.org/ Userspace applications often require to constantly poll privacy control. Currently, polling privacy control requires keeping the video node open, which prevents the camera from autosuspending. This patchset adds a separate v4l2 subdevice. Userspace access the gpio via V4L2_CID_PRIVACY in the new subdevice. Applications can poll the privacy control status without opening the video node and activate the camera. The non-gpio V4L2_CID_PRIVACY in uvc is not affected. Suggested-by: Ricardo Ribalda Signed-off-by: Yunke Cao --- Yunke Cao (3): media: v4l2-ctrls: Expose v4l2_ctrl_fill_event() media: uvcvideo: remove entity privacy control in the uvc video node media: uvcvideo: reimplement privacy GPIO as a separate subdevice drivers/media/usb/uvc/uvc_ctrl.c | 17 ------- drivers/media/usb/uvc/uvc_driver.c | 44 ++---------------- drivers/media/usb/uvc/uvc_entity.c | 76 +++++++++++++++++++++++++++++++ drivers/media/usb/uvc/uvcvideo.h | 19 +++++--- drivers/media/v4l2-core/v4l2-ctrls-core.c | 9 ++-- include/media/v4l2-ctrls.h | 12 +++++ 6 files changed, 111 insertions(+), 66 deletions(-) --- base-commit: 7dd4b804e08041ff56c88bdd8da742d14b17ed25 change-id: 20230111-uvc_privacy_subdev-1e7a167e86eb Best regards,