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=-4.7 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED 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 79967C433E2 for ; Fri, 28 Aug 2020 04:58:38 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 43CDD20848 for ; Fri, 28 Aug 2020 04:58:38 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="op2PNIid" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 43CDD20848 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=perches.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-rockchip-bounces+linux-rockchip=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=merlin.20170209; h=Sender:Content-Transfer-Encoding: Content-Type:Cc:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To:Date:To:From: Subject:Message-ID:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=QuepoZGBvos/Q7fy0YrDa0+uaY6QIFFfSlLsq0/vdoI=; b=op2PNIidqVTWgu/+ezrsdrM31 tI9SuaKW83mnBNg+mBInL1FfBGtxFqTvnTZkr/dKx8Pmpo4Z84zeMIrjVnIZKerEt50FpsCPDXkbd 1Ji+wzYk0N2f+3iD2+aFfXi4Q3Er+yW3bIJZ5yToM6c62TGukciuXzTyfjLfNvfm3q4YfTt+Cw9Uo /LY7BX0kHNAg1oXZwwPn3fv6vaTqn0Pc3TU1aEtf+3+1BHqnaW2nsBjQEod0EzdGkdX1aEeQbLeCD oXH5VSnhpkUEBDrVRvbXxEhJDCEAMgHu5iuK2a438/u3Q7HUSxhSZ2vB4n8MwMzaGKWULn8DYOSa6 S3CsR1vJw==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1kBWT8-0001nI-Bo; Fri, 28 Aug 2020 04:58:30 +0000 Received: from smtprelay0190.hostedemail.com ([216.40.44.190] helo=smtprelay.hostedemail.com) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1kBWT5-0001ma-Rk for linux-rockchip@lists.infradead.org; Fri, 28 Aug 2020 04:58:28 +0000 Received: from filter.hostedemail.com (clb03-v110.bra.tucows.net [216.40.38.60]) by smtprelay06.hostedemail.com (Postfix) with ESMTP id E8D7F18018051; Fri, 28 Aug 2020 04:58:25 +0000 (UTC) X-Session-Marker: 6A6F6540706572636865732E636F6D X-HE-Tag: ink23_410c29327073 X-Filterd-Recvd-Size: 1886 Received: from XPS-9350.home (unknown [47.151.133.149]) (Authenticated sender: joe@perches.com) by omf17.hostedemail.com (Postfix) with ESMTPA; Fri, 28 Aug 2020 04:58:24 +0000 (UTC) Message-ID: <1fd895d12c756478ebfb92de1252b772b6fd417a.camel@perches.com> Subject: Re: Printing bitfields in the kernel (Re: [PATCH] drm: Parse Colorimetry data block from EDID) From: Joe Perches To: Pekka Paalanen , Algea Cao Date: Thu, 27 Aug 2020 21:58:22 -0700 In-Reply-To: <20200827103456.57edaf59@eldfell> References: <20200826142328.131144-1-algea.cao@rock-chips.com> <20200827103456.57edaf59@eldfell> User-Agent: Evolution 3.36.4-0ubuntu1 MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200828_005827_945662_907451BC X-CRM114-Status: UNSURE ( 7.68 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-rockchip@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Upstream kernel work for Rockchip platforms List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: daniel@ffwll.ch, airlied@linux.ie, maarten.lankhorst@linux.intel.com, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-rockchip@lists.infradead.org, mripard@kernel.org, tzimmermann@suse.de Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "Linux-rockchip" Errors-To: linux-rockchip-bounces+linux-rockchip=archiver.kernel.org@lists.infradead.org On Thu, 2020-08-27 at 10:34 +0300, Pekka Paalanen wrote: > On Wed, 26 Aug 2020 22:23:28 +0800 > Algea Cao wrote: > > > CEA 861.3 spec adds colorimetry data block for HDMI. > > Parsing the block to get the colorimetry data from > > panel. If flags are int, I could imagine another %p extension where %*p is used like: printk("flags: %*pn", flags, bitstrings) where flags is: BIT(0) BIT(1) ... BIT(last) and char *bitstrings[] = { "bit 0 description", "bit 1 description", ... "last bit description" }; Or define YA struct with 2 entries as the struct members and use that. struct foo { unsigned long flags, char ** descriptions, }; struct foo bar = {.flags = .descriptions = bitstrings}; printk("flags: %p\n, &bar); _______________________________________________ Linux-rockchip mailing list Linux-rockchip@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-rockchip