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[2620:137:e000::1:20]) by mx.google.com with ESMTP id bb6-20020a1709070a0600b00781bbff1cc1si16940543ejc.455.2022.11.10.00.15.12; Thu, 10 Nov 2022 00:15:41 -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; 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 Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232269AbiKJINZ (ORCPT + 99 others); Thu, 10 Nov 2022 03:13:25 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40148 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231769AbiKJINY (ORCPT ); Thu, 10 Nov 2022 03:13:24 -0500 Received: from mailgw.kylinos.cn (unknown [124.126.103.232]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2184118B26; Thu, 10 Nov 2022 00:13:19 -0800 (PST) X-UUID: 7eef3482953a4f408d397b9d764f0dcd-20221110 X-CPASD-INFO: 437978b74e51435bbdff1efacb0a72e6@fYNxWWRqkGdghXd9g3aAnIKVlpZhkYa wpZxQkWVikVaVhH5xTV5uYFV9fWtVYV9dYVR6eGxQYmBgZFJ4i3-XblBgXoZgUZB3g3VxWWdmkg== X-CLOUD-ID: 437978b74e51435bbdff1efacb0a72e6 X-CPASD-SUMMARY: SIP:-1,APTIP:-2.0,KEY:0.0,FROMBLOCK:1,OB:0.0,URL:-5,TVAL:172. 0,ESV:0.0,ECOM:-5.0,ML:0.0,FD:0.0,CUTS:122.0,IP:-2.0,MAL:-5.0,PHF:-5.0,PHC:-5 .0,SPF:4.0,EDMS:-5,IPLABEL:4480.0,FROMTO:0,AD:0,FFOB:0.0,CFOB:0.0,SPC:0,SIG:- 5,AUF:3,DUF:7983,ACD:137,DCD:137,SL:0,EISP:0,AG:0,CFC:0.577,CFSR:0.039,UAT:0, RAF:0,IMG:-5.0,DFA:0,DTA:0,IBL:-2.0,ADI:-5,SBL:0,REDM:0,REIP:0,ESB:0,ATTNUM:0 ,EAF:0,CID:-5.0,VERSION:2.3.17 X-CPASD-ID: 7eef3482953a4f408d397b9d764f0dcd-20221110 X-CPASD-BLOCK: 1000 X-CPASD-STAGE: 1 X-UUID: 7eef3482953a4f408d397b9d764f0dcd-20221110 X-User: aichao@kylinos.cn Received: from localhost.localdomain [(112.64.161.44)] by mailgw (envelope-from ) (Generic MTA) with ESMTP id 82805009; Thu, 10 Nov 2022 16:13:31 +0800 From: Ai Chao To: laurent.pinchart@ideasonboard.com, mchehab@kernel.org Cc: linux-media@vger.kernel.org, linux-kernel@vger.kernel.org, aichao@kylinos.cn Subject: [PATCH] media: uvcvideo: Fix bandwidth error for Alcor camera Date: Thu, 10 Nov 2022 16:12:59 +0800 Message-Id: <20221110081259.947269-1-aichao@kylinos.cn> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 X-Spam-Status: No, score=-0.9 required=5.0 tests=BAYES_00,KHOP_HELO_FCRDNS, PDS_RDNS_DYNAMIC_FP,RDNS_DYNAMIC,SPF_HELO_NONE,T_SPF_PERMERROR, UNPARSEABLE_RELAY autolearn=no 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?1749096219120598575?= X-GMAIL-MSGID: =?utf-8?q?1749096219120598575?= For Alcor Corp. Slave camera(1b17:6684), it support to output compressed video data, and it return a wrong dwMaxPayloadTransferSize fields. This is a fireware issue, but the manufacturer cannot provide a const return fields by the fireware. so we check the dwMaxPayloadTransferSize fields, if it large than 0x1000, reset dwMaxPayloadTransferSize to 1024. Signed-off-by: Ai Chao --- drivers/media/usb/uvc/uvc_video.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/media/usb/uvc/uvc_video.c b/drivers/media/usb/uvc/uvc_video.c index d2eb9066e4dc..49226c3f423c 100644 --- a/drivers/media/usb/uvc/uvc_video.c +++ b/drivers/media/usb/uvc/uvc_video.c @@ -234,6 +234,14 @@ static void uvc_fixup_video_ctrl(struct uvc_streaming *stream, ctrl->dwMaxPayloadTransferSize = bandwidth; } + + /*Alcor Corp. Slave camera return wrong dwMaxPayloadTransferSize*/ + if ((format->flags & UVC_FMT_FLAG_COMPRESSED) && + (ctrl->dwMaxPayloadTransferSize > 0x1000) && + (le16_to_cpu(stream->dev->udev->descriptor.idVendor) == 0x1b17) && + (le16_to_cpu(stream->dev->udev->descriptor.idProduct) == 0x6684)) { + ctrl->dwMaxPayloadTransferSize = 1024; + } } static size_t uvc_video_ctrl_size(struct uvc_streaming *stream)