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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1117BFA3741 for ; Wed, 26 Oct 2022 12:06:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233652AbiJZMGl (ORCPT ); Wed, 26 Oct 2022 08:06:41 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47494 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233678AbiJZMGg (ORCPT ); Wed, 26 Oct 2022 08:06:36 -0400 Received: from mail-ej1-x629.google.com (mail-ej1-x629.google.com [IPv6:2a00:1450:4864:20::629]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5FFF48C444 for ; Wed, 26 Oct 2022 05:06:34 -0700 (PDT) Received: by mail-ej1-x629.google.com with SMTP id fy4so20600687ejc.5 for ; Wed, 26 Oct 2022 05:06:34 -0700 (PDT) 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=K+wpoucsam8HgjE7xBOxIEpNYkP1ktkxz61ClGB46cA=; b=dC2Bv6FiSin0CSgAmVosmCJ+eai2jsU4rN1dPyG7x5VF6lNE3GAE8mMf2hHW7V1VF8 oIh0skyKGZlWNsx8abHrGIvDtz6t9DzJ3ON6l1/f3pCD5lbZRKelJ7xW00c+H/KcgGY5 quZAWM8CYxggSYKIimYsWgdcqdSVrayXGx99A= 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=K+wpoucsam8HgjE7xBOxIEpNYkP1ktkxz61ClGB46cA=; b=ZrCtrsZZXG/vM1yazoc/fJFxl4n3jVtkmrfsD77x0RagN+g13A2P7qlid7xp7IYNjn fkd+qHCsuZ5HDkbANQ9QlbFPzqrdvzyKZj5cT51BNBcMEp3X9GFvc+YivMh+/Kmjhcv+ 2LjUbdsHro7Ql/aDxoYjinhv+6GABwrEQXyTbRL43h34TrhaFL5QrH8+qAsOQiPxDdPf JVOI06GFRpnxqcePZyOBQMBNbzuOBpWtnnrsx7R5n9kTiNGd8R0KreSJmAt1n9n6AyoQ VObCiMMJ47VFRvYGLygEWgWlHJMtRVu45ALT74zeAfDbbNV9b/Iu3omiatZCeV7CqgPC dAlg== X-Gm-Message-State: ACrzQf25H3RA+Jyy1DxuUeGwvBAyK5n1xNJPPSSWSK0920cRWnnq9T4/ WDVEIIwIgYrqXAzdVjJ4VgAduw== X-Google-Smtp-Source: AMsMyM4SbImw6oySJMAAfoVMocz3nXstLQnkTAt7GJU/SUOzO6yR6goVVHT63Aka80haSRWvTP3mfw== X-Received: by 2002:a17:906:8a79:b0:78d:9c52:2196 with SMTP id hy25-20020a1709068a7900b0078d9c522196mr37655250ejc.328.1666785992938; Wed, 26 Oct 2022 05:06:32 -0700 (PDT) Received: from alco.roam.corp.google.com ([2620:0:1059:10:b47a:bedd:2941:1e3f]) by smtp.gmail.com with ESMTPSA id y18-20020a17090668d200b0079e11b8e891sm2892546ejr.125.2022.10.26.05.06.31 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 26 Oct 2022 05:06:32 -0700 (PDT) Subject: [PATCH v3 0/7] [RESEND] media: uvcvideo: Implement granular power management MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 8bit X-b4-tracking: H4sIAK0iWWMC/4XNywrCMBAF0F+RrI10JvTlyv8QF3kMTaBNZGIjUvrvBpcudDXcC/fMJjJxoCzOh0 0wlZBDijWo40FYr+NEMriaBTaIzYiNZMoUnbynJ3HWhWQ7DtDDSA67XtSZ0ZmkYR2tr8O4znMtfciP xK/PmwL1XH+IBWQjAZXWaLQaVHexntMS1uWUeBK36hX8Z2A1WlCtA2PAquHL2Pf9DW1Ro1b8AAAA From: Ricardo Ribalda Date: Wed, 26 Oct 2022 14:06:05 +0200 Message-Id: <20220920-resend-powersave-v3-0-c47856d8757e@chromium.org> To: Mauro Carvalho Chehab Cc: Tomasz Figa , Ricardo Ribalda , Guenter Roeck , Max Staudt , linux-kernel@vger.kernel.org, Alan Stern , Hans Verkuil , Laurent Pinchart , linux-media@vger.kernel.org X-Mailer: b4 0.11.0-dev-d93f8 X-Developer-Signature: v=1; a=openpgp-sha256; l=2376; i=ribalda@chromium.org; h=from:subject:message-id; bh=uU/LmE44MSUPsey8KnAa5kWGvA94mQwkg8xaCFAERoA=; b=owEBbQKS/ZANAwAKAdE30T7POsSIAcsmYgBjWSK1SyHP0O/9Kxa3PCVstmSDBxTK241wwbsqASRI th7m0cCJAjMEAAEKAB0WIQREDzjr+/4oCDLSsx7RN9E+zzrEiAUCY1kitQAKCRDRN9E+zzrEiJS4D/ 4i+YRp0fM4oXkgRQBjq9z29Zew4gpRz0795b0yAKFpAHKvx28MrKLK4CmjNpDnq1FOoK5FvN69jwCz RecszvK6yFN7ttZV9xr8WWwJU9e4yBYMM4//FOL9tPNOJoKfdLK8X3WAxUmex58lwNZwnEbPxgGiRv OsLG8hKeoCLvqT6nAvHI85VwZFW5skhx+ka7vXncjnQ+yIR7/WeSXjRnJQxP0fHm3sqP7Gk1Ix8ENE DEkD8tNUceV8KJS+kvDEkl3ZvBa0gtC/UU9Gn0zvexhChMo7sO9mibD4k6657/t6b2TKWJvY78Uomk AAmAjnyiMdpPkpKQDWH07lpyYI/MwEqnE8oUaQlM0DNqeUpa7OMd3w2Xz+4B/smNZEK0Z8yVI4Fbhw kodZ1BETIVK29tAIksWFlpUMkSnjG2kVTH77Ak1L69S+t1gnptTqjf7GOZ+vExCfA3Df/+YXa/SMhU p/8XH//UVXn9ZIQkTbJDjp8vRogi8f6IfqmVq69Xi6ytOMqKDam2jdDMj7tL42rKamNAl3NbajDjYO AI6b+jykS7Cjtf5m/QmZ+KVa75+fdS1jXAm3z2i5oPQrcmoUKBzDjnAJtPrwwmgfVnvcxWLNVI0ek+ 7YI5AAhoNK/d3igObYCXg7bL/qnRX/jSJxdaGBSvskADFcdF45nttqkLhKLQ== X-Developer-Key: i=ribalda@chromium.org; a=openpgp; fpr=9EC3BB66E2FC129A6F90B39556A0D81F9F782DA9 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Instead of suspending/resume the USB device at open()/close(), do it when the device is actually used. This way we can reduce the power consumption when a service is holding the video device and leaving it in an idle state. And now that all the access to the hardware, has a common entry path, use it to fix the race conditions to hardware disconnects. To: Mauro Carvalho Chehab Cc: linux-media@vger.kernel.org Cc: linux-kernel@vger.kernel.org Cc: Laurent Pinchart Cc: Tomasz Figa Cc: Alan Stern Cc: Hans Verkuil Cc: Guenter Roeck Cc: Max Staudt Signed-off-by: Ricardo Ribalda --- Changes in v3: - Rebase on top of uvc/next - Reorder series, and put "controversial" patches at the end. - Fix "use-before-set" bug. Thanks Max! - Link to v2: https://lore.kernel.org/r/20220920-resend-powersave-v2-0-5135d1bb1c38@chromium.org Changes in v2: - Make access to uvc_status contitional - Merge with Guenter race condition patchset: https://lore.kernel.org/lkml/20200917022547.198090-1-linux@roeck-us.net/ - Link to v1: https://lore.kernel.org/r/20220920-resend-powersave-v1-0-123aa2ba3836@chromium.org --- Guenter Roeck (4): media: uvcvideo: Cancel async worker earlier media: uvcvideo: Release stream queue when unregistering video device media: uvcvideo: Lock video streams and queues while unregistering media: uvcvideo: Protect uvc queue file operations against disconnect Ricardo Ribalda (3): media: uvcvideo: Refactor streamon/streamoff media: uvcvideo: Do power management granularly media: uvcvideo: Only call status ep if hw supports it drivers/media/usb/uvc/uvc_ctrl.c | 11 +- drivers/media/usb/uvc/uvc_driver.c | 35 +++++-- drivers/media/usb/uvc/uvc_queue.c | 32 +++++- drivers/media/usb/uvc/uvc_status.c | 11 +- drivers/media/usb/uvc/uvc_v4l2.c | 206 ++++++++++++++++++++++++++++++------- drivers/media/usb/uvc/uvcvideo.h | 2 + 6 files changed, 248 insertions(+), 49 deletions(-) --- base-commit: 58540610e464d8b2ba46a11b81c3e6fcc4118fae change-id: 20220920-resend-powersave-5981719ed267 Best regards, -- Ricardo Ribalda