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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 06593C433F5 for ; Tue, 5 Apr 2022 22:39:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1452064AbiDEWbU (ORCPT ); Tue, 5 Apr 2022 18:31:20 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57382 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1355323AbiDEKTV (ORCPT ); Tue, 5 Apr 2022 06:19:21 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 91B26167C8; Tue, 5 Apr 2022 03:04:45 -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 dfw.source.kernel.org (Postfix) with ESMTPS id BE41261673; Tue, 5 Apr 2022 10:04:44 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id D1A38C385A2; Tue, 5 Apr 2022 10:04:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1649153084; bh=rc1NwCWd8u+M5IBIMATcIr0JQ05JfKrMq+26TiR0vLM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=sL2QfIIU0gUIN7edkwzKK2cjaiiUMQPHPqL4ptzMCLY0y1guCaaghE674MI1A2d0q z0tGb8ImYBVxEeY8MXMKDPta/g2Io4aL5LT9c6MxTjuocalR9ZV0zH1lWaYJFZa2U1 lCwVKJ0BgKEaRyebdSPklmtl0r++RZ+0HSlvhrXY= 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 5.10 096/599] drm/edid: check basic audio support on CEA extension block Date: Tue, 5 Apr 2022 09:26:30 +0200 Message-Id: <20220405070301.688093566@linuxfoundation.org> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220405070258.802373272@linuxfoundation.org> References: <20220405070258.802373272@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@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 @@ -4806,7 +4806,8 @@ 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");