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 X-Spam-Level: X-Spam-Status: No, score=-6.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, UNPARSEABLE_RELAY,USER_AGENT_GIT autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id CD4C9C11F6A for ; Fri, 2 Jul 2021 09:28:41 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B898E6120C for ; Fri, 2 Jul 2021 09:28:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231282AbhGBJbM (ORCPT ); Fri, 2 Jul 2021 05:31:12 -0400 Received: from mailgw01.mediatek.com ([60.244.123.138]:53699 "EHLO mailgw01.mediatek.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S230476AbhGBJbL (ORCPT ); Fri, 2 Jul 2021 05:31:11 -0400 X-UUID: 8cdbb4eeab4a42d79d2acc5f97a00b58-20210702 X-UUID: 8cdbb4eeab4a42d79d2acc5f97a00b58-20210702 Received: from mtkcas06.mediatek.inc [(172.21.101.30)] by mailgw01.mediatek.com (envelope-from ) (Generic MTA with TLSv1.2 ECDHE-RSA-AES256-SHA384 256/256) with ESMTP id 734400183; Fri, 02 Jul 2021 17:28:35 +0800 Received: from MTKCAS06.mediatek.inc (172.21.101.30) by mtkmbs01n2.mediatek.inc (172.21.101.79) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Fri, 2 Jul 2021 17:28:34 +0800 Received: from mtksdccf07.mediatek.inc (172.21.84.99) by MTKCAS06.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Fri, 2 Jul 2021 17:28:34 +0800 From: YP WU To: CC: , , , , , , , , Subject: Re: How to use "DTV_FE_CAPABILITY" command for Frontend.h of Linux DVB Date: Fri, 2 Jul 2021 17:28:34 +0800 Message-ID: <20210702092834.11699-1-yp.wu@mediatek.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20210623093312.6f9883a5@coco.lan> References: <20210623093312.6f9883a5@coco.lan> MIME-Version: 1.0 Content-Type: text/plain X-MTK: N Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, Mr.Mauro, About use case, I describe below: For our design of kernel, demod/tuner and LNB are registered to different frontend device nodes. We want to implement property command to know if the frontend device node is LNB device or demod/tuner device. If it is LNB device node, the value would return true If it is demod/tuner device node, the value would return false. Do you have better idea or suggestion for our usage? Please let me know if your have better suggestion. Very thank you for your help. BRs, YP