From patchwork Thu Nov 3 13:40:42 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ricardo Ribalda X-Patchwork-Id: 621269 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 CF0A2C4332F for ; Thu, 3 Nov 2022 13:41:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231685AbiKCNlP (ORCPT ); Thu, 3 Nov 2022 09:41:15 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42198 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230508AbiKCNlL (ORCPT ); Thu, 3 Nov 2022 09:41:11 -0400 Received: from mail-ej1-x62c.google.com (mail-ej1-x62c.google.com [IPv6:2a00:1450:4864:20::62c]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8A08DB7EE for ; Thu, 3 Nov 2022 06:41:08 -0700 (PDT) Received: by mail-ej1-x62c.google.com with SMTP id y14so5278904ejd.9 for ; Thu, 03 Nov 2022 06:41:08 -0700 (PDT) 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=hAg+4sE8YWXZby15NLt6b6O/GKFL5SevR49ad/qG3jk=; b=SMyq39jz27v0UrDE6kGVfxQdShfBOpq10vZia79dqcfy27jOmkJO/FvC3wfsnPq6u8 UB17Yu/BHFm7jD/SGZMYnaCS/9EC6FGBdn3KUsUkwf8c0Da4TNRULlmUsEdqq6cTKFlE rZU2PZSKMGhTZsEsfs9H22Qnw96dRctJqzMsI= 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=hAg+4sE8YWXZby15NLt6b6O/GKFL5SevR49ad/qG3jk=; b=SbL8QeeEeObHiCgAQsgXb3thKPGLyTZYVrTOBh8cwBPrvByk9o3VncaCnrHih/fiZh cvY//5trRdCt+M78Kk5c5xDCBScAhvHKBD2joZYEowv6dkE6YRwpzBkPKyysZG4J6I7z Sec84+g8BtIccR2d06JNl5EKNumC0033QctoJL+Mj4gEMpjDhBBUiFcP49CKmWtSR0AN Xcg4OU9mVzEYcHAhZNqUc/YpZiR4csN+FQCnsHtoIi4fPKIokk22KIRm6ro5QRMYBuKd E77lnhYQQx8lYp5XQun7CnucSl3L1M43d6SHWK4u5tTTfOdZTlKZBpqwomDNG/uxxpH5 tegw== X-Gm-Message-State: ACrzQf2jPDL0Vnv79d5U/JSqt5CIocxHyIG7f3spfv2iG7CNRaw6tFal AZnjDFkfPtSr7tZA9f25+1FCqRPVTCrTeild X-Google-Smtp-Source: AMsMyM5/QswgOwLDp5cypP1Clq1S8HPZ5lp4altI9Q1vKLb/Jl7Dh9G9Kzo3MTXUH1z/fFMAXGCovg== X-Received: by 2002:a17:907:7fa5:b0:791:9a5f:101a with SMTP id qk37-20020a1709077fa500b007919a5f101amr29207930ejc.453.1667482867070; Thu, 03 Nov 2022 06:41:07 -0700 (PDT) Received: from alco.roam.corp.google.com ([2620:0:1059:10:c1a3:5bc:2068:8f2c]) by smtp.gmail.com with ESMTPSA id j1-20020a17090623e100b0078d46aa3b82sm521948ejg.21.2022.11.03.06.41.06 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 03 Nov 2022 06:41:06 -0700 (PDT) From: Ricardo Ribalda Date: Thu, 03 Nov 2022 14:40:42 +0100 Subject: [PATCH v2 1/8] media: uvc: Extend documentation of uvc_video_clock_decode() MIME-Version: 1.0 Message-Id: <20220920-resend-hwtimestamp-v2-1-d8d0616bb612@chromium.org> References: <20220920-resend-hwtimestamp-v2-0-d8d0616bb612@chromium.org> In-Reply-To: <20220920-resend-hwtimestamp-v2-0-d8d0616bb612@chromium.org> To: Laurent Pinchart , Mauro Carvalho Chehab Cc: HungNien Chen , linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, Ricardo Ribalda X-Mailer: b4 0.11.0-dev-d93f8 X-Developer-Signature: v=1; a=openpgp-sha256; l=968; i=ribalda@chromium.org; h=from:subject:message-id; bh=gsofO9f2SLuiO/HN5/Ipi1+oiVUCCXFoWuwu7SisXO0=; b=owEBbQKS/ZANAwAKAdE30T7POsSIAcsmYgBjY8Tkf8fp0z5WECCeQG2bF7AvURn7F3S2iH2qhsIO knUeB0WJAjMEAAEKAB0WIQREDzjr+/4oCDLSsx7RN9E+zzrEiAUCY2PE5AAKCRDRN9E+zzrEiAC4D/ 0eMu92YYKKbxptcTPKn7A0zBrhc5nLaRpFtHdgj0lDQy1Q20fJkEjfq1JycRlpuPG/uhdQkNbC/JxK RvNX+hxKjfeS0HWHONZ+SKPeCTPc8QqaG0l/wevvVP/xOEiO/sMkI4w/eXg8/DVyMuqXsBRENQsqoW LlrAHGKG0z6GMcq4CdhN3K3pfggU2cBDJDYWlVFjYXEzAIUQArDFBhelOpq0EhQ8KDP8I3N8e4Jnvh pcNdHlLz3BJlPkJV0P5pls6JDsO5vjtk9n0DFAMYNueD/mF+atg3DbmtPP2AFktMgj0PthWOElLbUN gwcytbgmDRWAfpJQj/sxn+wJqlo6RE6JtjnLMYqjHqjEvjEOQkYPy4YYsLWu6eW/TvUNDHY7pQLM2P tJkYuc9RyMXe/MlhrE407oMErfEio+l77pdlKTkbepSzwp7YnU+UOkiFRD19mTOrfmvR5Cn0kNjMUw k3XsrT5WkRfZbFR9k9lNi5rxFkbw+Eq39ubp5UwOjZOJ61Nhgvr7YBDk9euV9xXbAbzF+PWkS0nN5A Q9sBFyRpFCpyp4fiNUvI7D2maHxha9mzxxvzcquAldn77Lk/qXLHjHLNvXE8k/BFXV4U0WYtNCJrWg P9jKnplmbPLZ+OkyeWhv/S+M8tqianWhBZXKqUY1pCMoBBv+CPg111q2Uy/g== X-Developer-Key: i=ribalda@chromium.org; a=openpgp; fpr=9EC3BB66E2FC129A6F90B39556A0D81F9F782DA9 Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org Make a explicit reference to uvc 1.5, explaining how the algorithm supports the different behaviour of uvc 1.1 and 1.5. Tested-by: HungNien Chen Signed-off-by: Ricardo Ribalda diff --git a/drivers/media/usb/uvc/uvc_video.c b/drivers/media/usb/uvc/uvc_video.c index 170a008f4006..ab56e65ca324 100644 --- a/drivers/media/usb/uvc/uvc_video.c +++ b/drivers/media/usb/uvc/uvc_video.c @@ -517,6 +517,9 @@ uvc_video_clock_decode(struct uvc_streaming *stream, struct uvc_buffer *buf, /* * To limit the amount of data, drop SCRs with an SOF identical to the * previous one. + * This filtering is also needed for supporting UVC 1.5. Where all the + * data packages of the same frame contains the same sof. In that case + * only the first one will match the host_sof. */ dev_sof = get_unaligned_le16(&data[header_size - 2]); if (dev_sof == stream->clock.last_sof)