From patchwork Fri Dec 2 17:02:48 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ricardo Ribalda X-Patchwork-Id: 29021 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:adf:f944:0:0:0:0:0 with SMTP id q4csp972992wrr; Fri, 2 Dec 2022 09:08:56 -0800 (PST) X-Google-Smtp-Source: AA0mqf50EkkO4fZymttMETAdGvgEXUc2CEdnWsqy2a02omqsMdkfi0/pgii+ztamY0UJANp33lIz X-Received: by 2002:a63:1763:0:b0:476:d5be:4511 with SMTP id 35-20020a631763000000b00476d5be4511mr38545611pgx.139.1670000935819; Fri, 02 Dec 2022 09:08:55 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1670000935; cv=none; d=google.com; s=arc-20160816; b=CRSjTvXZ9YOA3s8acWFMrdMkTsq96C8t0JEXr9cOBDhHrsVIuAW/1qRS4pstpGb5NS TqCf/An8Qs7hWIE95dCPxCmg2uXocOQ7OwJie8Qh6eOnNkSynihktXhU85mrq56ZTFqX NnJWSi7ROE0FqJpdKLs3fpuamJbAeiK0JwbOKRhzW1HTf6cDrYLMAzNVehrNf+Jx1afp VzzVZPwof1l0cbW4pSpIQqEk63sEEzcT+tpi5lh4UBOFjt6PtmuJp8n4VlT/USX/zcsa pg7tGpKzZrfREFjRa2qu6AZ9B7eN+Mdg34L3gdxEivr6z06PG/nFZFcM+HBxLEH1UMrH 1QBQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:cc:to:in-reply-to:references:message-id :content-transfer-encoding:mime-version:subject:date:from :dkim-signature; bh=/Z0mke9x4z8GIO16lOl+BgRgkcVeUrWg/yLKPpvbpk0=; b=rNXIOuONMj0DTyibXqjhqKim5lL+rEH/HUkmu7+eKFbJCgKdQjELh+ZxFjbmwkTFRq 8qMYwYrifVgo6VSKQBdwXuAAqZqKiUDx/DNgdS5lSo7sdyMeRoa0VKeesV9lHmlggzVW fGJK94U5bT316Buok4GsuZB6tLmJo6GFPIkfx6EnUTXEub/MD6KLBAiBsWdc00tCHZpZ KwEdTjd8078F7KDAbB7oZXYQLwfiL68yv16pptKjLjFbm59QASVv4zhVscZdm3cNuWjP ButjpfSbys0DHWpI5CKoxodxpS0b2TrDb5D8kniMVRQ5ENNSmZYfUJaCS73XRkikFLKW J2Kg== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@chromium.org header.s=google header.b=KRuFz2z0; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=chromium.org Received: from out1.vger.email (out1.vger.email. [2620:137:e000::1:20]) by mx.google.com with ESMTP id iy3-20020a170903130300b001869ba21491si7262957plb.8.2022.12.02.09.08.41; Fri, 02 Dec 2022 09:08:55 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@chromium.org header.s=google header.b=KRuFz2z0; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=chromium.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234417AbiLBRDm (ORCPT + 99 others); Fri, 2 Dec 2022 12:03:42 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33548 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234281AbiLBRDJ (ORCPT ); Fri, 2 Dec 2022 12:03:09 -0500 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 3F434A80A2 for ; Fri, 2 Dec 2022 09:03:08 -0800 (PST) Received: by mail-ej1-x629.google.com with SMTP id n20so13045685ejh.0 for ; Fri, 02 Dec 2022 09:03:08 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:from:to:cc:subject:date:message-id :reply-to; bh=/Z0mke9x4z8GIO16lOl+BgRgkcVeUrWg/yLKPpvbpk0=; b=KRuFz2z0S00H+Jjqi+ULpUWR9oqEccGYNJsAXZkGZBhcf65dYLS+1T60tut2/084H9 yFv8Ka0pIlw9bYdvYfPfIwQnaIMHbWOkBl+Jq/ice6ApLUxFH2OyJayzcbyfsoSRShMP mPkqZWZDlmcJ9vI5y6DfbmeuD9vPMDD0NZ0Ss= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=/Z0mke9x4z8GIO16lOl+BgRgkcVeUrWg/yLKPpvbpk0=; b=wzv6m4zasEUIIXVzl4aD3YafKY9fXjYF0nXT7QCkUxIGK961Y1TVEdOAuvvWvWO27F 6uGwpOZAf+OoMxKQRjtGZXICYzTR0/7ZCEx8p+W4bfwFQTqaK3vsoudiCLfQNnXhzAUi fEZqK/1TODeKZAFBlDUh1JO1suaXAUtE5wWBGRhxcmjQYybRTSCzR95fbHNRZ+sN5QNJ mdosbbVrmsU3z8H4mrzPovoQOzYoierYyPkg9u84SW4wN2ipDrFs89K0e2TrmQZK5vH+ 7AWlTo6aaRg57X4TtEa7/ZdkJ4PJ7w1d/ZsaTdnLjBArMj7oTT3LdVFEWgIs3mq0+YfF xg1g== X-Gm-Message-State: ANoB5pms+fs8ruHBkfSfSoMNvYIwRjUc2AR00fYBoHDtImUBmRU5gmkK X08esyMmQTthBRS7+PJ6qGa12w== X-Received: by 2002:a17:906:706:b0:7ac:2e16:eb05 with SMTP id y6-20020a170906070600b007ac2e16eb05mr63176435ejb.26.1670000586670; Fri, 02 Dec 2022 09:03:06 -0800 (PST) Received: from alco.roam.corp.google.com (80.71.134.83.ipv4.parknet.dk. [80.71.134.83]) by smtp.gmail.com with ESMTPSA id sa22-20020a170906edb600b0073d7ab84375sm3249133ejb.92.2022.12.02.09.03.05 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 02 Dec 2022 09:03:06 -0800 (PST) From: Ricardo Ribalda Date: Fri, 02 Dec 2022 18:02:48 +0100 Subject: [PATCH RESEND v2 8/8] media: uvcvideo: Fix hw timestampt handling for slow FPS MIME-Version: 1.0 Message-Id: <20220920-resend-hwtimestamp-v2-8-0d7978a817cc@chromium.org> References: <20220920-resend-hwtimestamp-v2-0-0d7978a817cc@chromium.org> In-Reply-To: <20220920-resend-hwtimestamp-v2-0-0d7978a817cc@chromium.org> To: Mauro Carvalho Chehab , Laurent Pinchart Cc: "hn.chen" , linux-media@vger.kernel.org, Ricardo Ribalda , linux-kernel@vger.kernel.org X-Mailer: b4 0.11.0-dev-696ae X-Developer-Signature: v=1; a=openpgp-sha256; l=2142; i=ribalda@chromium.org; h=from:subject:message-id; bh=ZqBE4dWRk0InSyAxEr/auCSM1bp+38IChW6qVFv0hng=; b=owEBbQKS/ZANAwAKAdE30T7POsSIAcsmYgBjii/Bd0vLNfrMM135jh9PhB+8ydixKJHN5VNmGQ1w 6MdQC8WJAjMEAAEKAB0WIQREDzjr+/4oCDLSsx7RN9E+zzrEiAUCY4ovwQAKCRDRN9E+zzrEiGdGD/ 9DoAVTWVQznsEgzOwpYpRyWMCIQBxtwlwKzaq1BnTIWye0goRJf5CjrA9bRJu+Z6+rx/+lp/RTMufc MVg5aMuukcsBzqLmyag5x0oDtpufG/8q8n2V/I+eejUQIFhJ/WgRBeRArQaT9Ib0AKH9ZXcZt/uMTa yGrm+vuxIPwgV1SuSPB5rIxtxwyUAfiq7qlxJArP79mrahtKd78OmPqqKX5q0h64kJzurNStsVKwbw qigdhxx3mcd8ABG20FwkR2+uV72DJqtQxmTcFtiNkThYx9dAVGxnF+hi70ALb9Dt0KpiB+eXme+mzQ xpLSqnfBKJ0kUOikWg+horEpNYRqVMGp5DWgZ6Z0FDz6JfeDzu5/MbrQwUfr8MocQajT2SS5/+S7OI PHexHL/gL++hSerdMcUMIX0G3RxG+sAJHjcA6G97N0Qinm/yb6WuYKEDAp/PtldnBNrbFCe9aCEIbJ UmRo+SfzDzWrRpf1gxmME/bl68ZyQzBIiZMhajxdBi7VazfWPFNfmNcOKR/94iaIn/S1wmMpFCZUZK TG3CY6KD/rbVr64gJDE/XQMagdmzJFdtwG2F0SGjMp621qyhW6nIA3ZFpAhJreZkPAdoKlHaet+tAm XP6RlzuWoO5Ab/c4qButbsLioCEdGQd1KqvgIlt3Z0r9bJEbSeajw8QWfEmg== X-Developer-Key: i=ribalda@chromium.org; a=openpgp; fpr=9EC3BB66E2FC129A6F90B39556A0D81F9F782DA9 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=ham 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-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1751122901119602740?= X-GMAIL-MSGID: =?utf-8?q?1751122901119602740?= In UVC 1.5, when working with FPS under 32, there is a chance that the circular buffer contains two dev_sof overflows, but the clock interpolator is only capable of handle a single overflow. Remove all the samples from the circular buffer that are two overflows old. Tested-by: HungNien Chen Signed-off-by: Ricardo Ribalda --- drivers/media/usb/uvc/uvc_video.c | 15 +++++++++++++++ drivers/media/usb/uvc/uvcvideo.h | 1 + 2 files changed, 16 insertions(+) diff --git a/drivers/media/usb/uvc/uvc_video.c b/drivers/media/usb/uvc/uvc_video.c index c81a8362d582..6b6bd521d6c2 100644 --- a/drivers/media/usb/uvc/uvc_video.c +++ b/drivers/media/usb/uvc/uvc_video.c @@ -471,6 +471,20 @@ static void uvc_video_clock_add_sample(struct uvc_clock *clock, spin_lock_irqsave(&clock->lock, flags); + /* Delete last overflows */ + if (clock->head == clock->last_sof_overflow) + clock->last_sof_overflow = -1; + + /* Handle overflows */ + if (clock->count > 0 && clock->last_sof > sample->dev_sof) { + /* Remove data from the last^2 overflows */ + if (clock->last_sof_overflow != -1) + clock->count = (clock->head - clock->last_sof_overflow) + % clock->count; + clock->last_sof_overflow = clock->head; + } + + /* Add sample */ memcpy(&clock->samples[clock->head], sample, sizeof(*sample)); clock->last_sof = sample->dev_sof; clock->head = (clock->head + 1) % clock->size; @@ -594,6 +608,7 @@ static void uvc_video_clock_reset(struct uvc_clock *clock) clock->head = 0; clock->count = 0; clock->last_sof = -1; + clock->last_sof_overflow = -1; clock->sof_offset = -1; } diff --git a/drivers/media/usb/uvc/uvcvideo.h b/drivers/media/usb/uvc/uvcvideo.h index 14daa7111953..d8c520ce5a86 100644 --- a/drivers/media/usb/uvc/uvcvideo.h +++ b/drivers/media/usb/uvc/uvcvideo.h @@ -647,6 +647,7 @@ struct uvc_streaming { unsigned int head; unsigned int count; unsigned int size; + unsigned int last_sof_overflow; u16 last_sof; u16 sof_offset;