From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from lb3-smtp-cloud3.xs4all.net ([194.109.24.30]:41733 "EHLO lb3-smtp-cloud3.xs4all.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754350AbcCULot (ORCPT ); Mon, 21 Mar 2016 07:44:49 -0400 Subject: Re: [PATCH v3] media: Support Intersil/Techwell TW686x-based video capture cards To: Ezequiel Garcia , linux-media@vger.kernel.org References: <1453699436-4309-1-git-send-email-ezequiel@vanguardiasur.com.ar> <1456929016-4160-1-git-send-email-ezequiel@vanguardiasur.com.ar> Cc: =?UTF-8?Q?Krzysztof_Ha=c5=82asa?= From: Hans Verkuil Message-ID: <56EFDEAC.2040904@xs4all.nl> Date: Mon, 21 Mar 2016 12:44:44 +0100 MIME-Version: 1.0 In-Reply-To: <1456929016-4160-1-git-send-email-ezequiel@vanguardiasur.com.ar> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit Sender: linux-media-owner@vger.kernel.org List-ID: Hi Ezequiel, On 03/02/2016 03:30 PM, Ezequiel Garcia wrote: > This commit introduces the support for the Techwell TW686x video > capture IC. This hardware supports a few DMA modes, including > scatter-gather and frame (contiguous). > > This commit makes little use of the DMA engine and instead has > a memcpy based implementation. DMA frame and scatter-gather modes > support may be added in the future. > > Currently supported chips: > - TW6864 (4 video channels), > - TW6865 (4 video channels, not tested, second generation chip), > - TW6868 (8 video channels but only 4 first channels using > built-in video decoder are supported, not tested), > - TW6869 (8 video channels, second generation chip). > > Cc: Krzysztof Hałasa > Signed-off-by: Ezequiel Garcia I've tested this with my PCIe tw6869 card (arrived this week). Video is fine, but only the first audio input is available. I suspect you have only one audio input? Regarding the memcpy: if you have a patch for me that reverts back to a non-memcpy situation, then I can do duration tests for you. Unless you've ordered one of these PCIe cards yourself? Regards, Hans