From patchwork Tue Apr 5 07:17:42 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg Kroah-Hartman X-Patchwork-Id: 557597 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id C64BDC433F5 for ; Tue, 5 Apr 2022 09:27:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1347519AbiDEJ1M (ORCPT ); Tue, 5 Apr 2022 05:27:12 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46614 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S243056AbiDEItt (ORCPT ); Tue, 5 Apr 2022 04:49:49 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0D7981D0DD; Tue, 5 Apr 2022 01:38:13 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 06D1AB81B18; Tue, 5 Apr 2022 08:37:48 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 692BFC385A1; Tue, 5 Apr 2022 08:37:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1649147866; bh=+cvy/v5TGZXagD6fIYk4pEytVC1K83ILUAf1awavJYs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=PSGZrzyBO5vhLMgFcgWU7Zk2GIkTQHaXIL3ioYzRC6Jv7N67AXeSLFzWadrLOaT1a V25oc34QF5gr8Oo7L2xBe03CVgae9UPB1BfDfKACscmjIumZeLjmVM7sDm0gVRQm4i +wGgN6Z34R0K2lIAyjeBBE9WzNr2PvmjNR3goj5I= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Jani Nikula , Shawn C Lee , intel-gfx , Cooper Chiou Subject: [PATCH 5.16 0149/1017] drm/edid: check basic audio support on CEA extension block Date: Tue, 5 Apr 2022 09:17:42 +0200 Message-Id: <20220405070358.630157664@linuxfoundation.org> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220405070354.155796697@linuxfoundation.org> References: <20220405070354.155796697@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Cooper Chiou commit 5662abf6e21338be6d085d6375d3732ac6147fd2 upstream. Tag code stored in bit7:5 for CTA block byte[3] is not the same as CEA extension block definition. Only check CEA block has basic audio support. v3: update commit message. Cc: stable@vger.kernel.org Cc: Jani Nikula Cc: Shawn C Lee Cc: intel-gfx Signed-off-by: Cooper Chiou Signed-off-by: Lee Shawn C Fixes: e28ad544f462 ("drm/edid: parse CEA blocks embedded in DisplayID") Reviewed-by: Jani Nikula Signed-off-by: Jani Nikula Link: https://patchwork.freedesktop.org/patch/msgid/20220324061218.32739-1-shawn.c.lee@intel.com Signed-off-by: Greg Kroah-Hartman --- drivers/gpu/drm/drm_edid.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) --- a/drivers/gpu/drm/drm_edid.c +++ b/drivers/gpu/drm/drm_edid.c @@ -4848,7 +4848,8 @@ bool drm_detect_monitor_audio(struct edi if (!edid_ext) goto end; - has_audio = ((edid_ext[3] & EDID_BASIC_AUDIO) != 0); + has_audio = (edid_ext[0] == CEA_EXT && + (edid_ext[3] & EDID_BASIC_AUDIO) != 0); if (has_audio) { DRM_DEBUG_KMS("Monitor has basic audio support\n");