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 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 EC447C433F5 for ; Mon, 21 Mar 2022 04:48:09 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 436F210E60E; Mon, 21 Mar 2022 04:48:09 +0000 (UTC) Received: from mga06.intel.com (mga06.intel.com [134.134.136.31]) by gabe.freedesktop.org (Postfix) with ESMTPS id 6403910E60E for ; Mon, 21 Mar 2022 04:48:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1647838087; x=1679374087; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=G1q94vMPDh34INP+LrJp8WrXQiAPljoyE6enwhiCA20=; b=B7HqVDbr6fWrPMhgHjTtHQC68veVz9I3i1gVExczGu5WGkgSZ6C07jZH 5JdpMH1jHahOkQh8swHgz04WLtklqnofwHeVFZh1O8GZqZKAsRc/schsR foCbKuPAphTvi1HS3aGkZJBLyx8dj/71EsP2fsQqt4syPs2IGPS3pCzkE 5IDaJWGXZF4/zwCjGvBORuMhvOM6lckGv10I4qzimy3MLpMGYiqenXlrq ItSqBImjNsX5qw24v7tEkGogR2HutJeHCNyGGgmF4yd7UtYrjTDsCC3wE bNL666lnBD8xYZz6Gt9fW3FMDEtpItAoTiVZJoq6r1C6K+LwD+SCCv0oW g==; X-IronPort-AV: E=McAfee;i="6200,9189,10292"; a="318177087" X-IronPort-AV: E=Sophos;i="5.90,197,1643702400"; d="scan'208";a="318177087" Received: from fmsmga006.fm.intel.com ([10.253.24.20]) by orsmga104.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 20 Mar 2022 21:48:06 -0700 X-IronPort-AV: E=Sophos;i="5.90,197,1643702400"; d="scan'208";a="784870830" Received: from cooperch-ml.itwn.intel.com ([10.5.231.29]) by fmsmga006-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 20 Mar 2022 21:48:05 -0700 From: Cooper Chiou To: intel-gfx@lists.freedesktop.org Date: Mon, 21 Mar 2022 12:43:30 +0800 Message-Id: <20220321044330.27723-1-cooper.chiou@intel.com> X-Mailer: git-send-email 2.35.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Subject: [Intel-gfx] [PATCH] drm/edid: filter DisplayID v2.0 CTA block in audio detection 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: Jani Nikula , Cooper Chiou Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" In DisplayID v2.0 CTS data block 0x81 case, there is no any audio information definition, but drm_detect_monitor_audio didn't filter it so that it caused eDP dummy audio card be detected improperly. We observed this issue on some AUO/BOE eDP panel with DID v2.0 CTA block, and fix issue by adding filter for edid_ext[0]=DATA_BLOCK_CTA case. Cc: Jani Nikula Cc: Shawn C Lee Signed-off-by: Cooper Chiou --- drivers/gpu/drm/drm_edid.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c index f5f5de362ff2..6c9ae4b130bd 100644 --- a/drivers/gpu/drm/drm_edid.c +++ b/drivers/gpu/drm/drm_edid.c @@ -4845,7 +4845,7 @@ bool drm_detect_monitor_audio(struct edid *edid) int start_offset, end_offset; edid_ext = drm_find_cea_extension(edid); - if (!edid_ext) + if (!edid_ext || (edid_ext[0] == DATA_BLOCK_CTA)) goto end; has_audio = ((edid_ext[3] & EDID_BASIC_AUDIO) != 0); -- 2.17.1