From patchwork Thu Mar 17 12:41:59 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Lee, Shawn C" X-Patchwork-Id: 12783971 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 gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id D5732C433FE for ; Thu, 17 Mar 2022 12:28:06 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 871CA10EB73; Thu, 17 Mar 2022 12:27:56 +0000 (UTC) Received: from mga17.intel.com (mga17.intel.com [192.55.52.151]) by gabe.freedesktop.org (Postfix) with ESMTPS id D312310EB4A; Thu, 17 Mar 2022 12:27:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1647520073; x=1679056073; h=from:to:cc:subject:date:message-id:in-reply-to: references; bh=iCHiRQrceVBMKgv90YGp4PSwebk+8BRBphnQAdUX0ks=; b=aRoRivPfCx7Iwjn0c1pj/A2yt+MZQQnV4hwIq6kq3sfUjiET2bDVZpQ1 3kCBXSyMLYYCQHh9IgDtGQchyDsNCR8SeX7wkmXTJtY6QuDLK2zbV8Axn NFNA6ZmNHnjuXlpzatjLcepTf4ow2TG5P33AMsckztITDj2T4vtFrnMvf XHQBk0NjpVZc3WKdrNXtEcWFuhpBpgpIwrmdPewabjVbRIYNUXmDJQ1FR 7pjsgEamcToyQukQoUaF8anXYR4ONaErs4PdKDkLWnC76qldZEcA4JWbI jRZ900bHJ7YH1YTH6xKN+c3p30CDNMoCNBypoVzb2x3+uwApIj+92/AD4 Q==; X-IronPort-AV: E=McAfee;i="6200,9189,10288"; a="237463785" X-IronPort-AV: E=Sophos;i="5.90,188,1643702400"; d="scan'208";a="237463785" Received: from orsmga001.jf.intel.com ([10.7.209.18]) by fmsmga107.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 17 Mar 2022 05:27:53 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.90,188,1643702400"; d="scan'208";a="581276707" Received: from shawnle1-build-machine.itwn.intel.com ([10.5.253.78]) by orsmga001.jf.intel.com with ESMTP; 17 Mar 2022 05:27:51 -0700 From: Lee Shawn C To: dri-devel@lists.freedesktop.org Date: Thu, 17 Mar 2022 20:41:59 +0800 Message-Id: <20220317124202.14189-3-shawn.c.lee@intel.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20220317124202.14189-1-shawn.c.lee@intel.com> References: <20220317124202.14189-1-shawn.c.lee@intel.com> Subject: [Intel-gfx] [v8 2/5] drm/edid: parse multiple CEA extension block X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: cooper.chiou@intel.com, william.tseng@intel.com, jani.nikula@intel.com, intel-gfx@lists.freedesktop.org, Drew Davenport Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" Try to find and parse more CEA ext blocks if edid->extensions is greater than one. v2: split prvious patch to two. And do CEA block parsing in this one. v3: simplify this patch based on previous change. v4: refine patch v3. v5: revert previous change. And check cea pointer return from drm_find_cea_extension(). If drvier got the same cea pointer then exit this routine. Cc: Jani Nikula Cc: Ville Syrjala Cc: Ankit Nautiyal Cc: Drew Davenport Cc: intel-gfx Signed-off-by: Lee Shawn C --- drivers/gpu/drm/drm_edid.c | 34 +++++++++++++++++++++------------- 1 file changed, 21 insertions(+), 13 deletions(-) diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c index 1251226d9284..ef65dd97d700 100644 --- a/drivers/gpu/drm/drm_edid.c +++ b/drivers/gpu/drm/drm_edid.c @@ -4319,16 +4319,24 @@ static void drm_parse_y420cmdb_bitmap(struct drm_connector *connector, static int add_cea_modes(struct drm_connector *connector, struct edid *edid) { - const u8 *cea, *db, *hdmi = NULL, *video = NULL; - u8 dbl, hdmi_len, video_len = 0; int modes = 0, ext_index = 0; + const u8 *cur_cea = NULL; - cea = drm_find_cea_extension(edid, &ext_index); - if (cea && cea_revision(cea) >= 3) { + for (;;) { + const u8 *cea, *db, *hdmi = NULL, *video = NULL; + u8 dbl, hdmi_len = 0, video_len = 0; int i, start, end; + cea = drm_find_cea_extension(edid, &ext_index); + if (!cea || cea == cur_cea) + break; + cur_cea = cea; + + if (cea_revision(cea) < 3) + continue; + if (cea_db_offsets(cea, &start, &end)) - return 0; + continue; for_each_cea_db(cea, i, start, end) { db = &cea[i]; @@ -4350,15 +4358,15 @@ add_cea_modes(struct drm_connector *connector, struct edid *edid) dbl - 1); } } - } - /* - * We parse the HDMI VSDB after having added the cea modes as we will - * be patching their flags when the sink supports stereo 3D. - */ - if (hdmi) - modes += do_hdmi_vsdb_modes(connector, hdmi, hdmi_len, video, - video_len); + /* + * We parse the HDMI VSDB after having added the cea modes as we will + * be patching their flags when the sink supports stereo 3D. + */ + if (hdmi) + modes += do_hdmi_vsdb_modes(connector, hdmi, hdmi_len, video, + video_len); + } return modes; }