From patchwork Thu Apr 14 13:09:14 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 12813511 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 0F34FC433EF for ; Thu, 14 Apr 2022 13:16:50 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id A2A8210FC53; Thu, 14 Apr 2022 13:16:49 +0000 (UTC) Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by gabe.freedesktop.org (Postfix) with ESMTPS id 2F38010FC53 for ; Thu, 14 Apr 2022 13:16:48 +0000 (UTC) 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 0D54F61374; Thu, 14 Apr 2022 13:16:46 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 19F64C385A9; Thu, 14 Apr 2022 13:16:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1649942205; bh=Ls02lJpoLoCiEXcMRba+271+rrDtFo/19bU458A4Jvs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=BzlxK2nDzGntmZCoZRRal3xT0SrXkQ5ro0ZNlGfXM5Z8n0XCZaQjmQ9HGW8SJZ8ds BW62Ip53Lpva317EPu40Nkc7Qyuo8ScwZSOOedMYd4p8n9YG+vJmGL9rsVUSR/9x0q GKAtwA0d4AwU4G+poDrwkBPSFcNpMqlJskBWpyNE= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Date: Thu, 14 Apr 2022 15:09:14 +0200 Message-Id: <20220414110840.349407260@linuxfoundation.org> X-Mailer: git-send-email 2.35.2 In-Reply-To: <20220414110838.883074566@linuxfoundation.org> References: <20220414110838.883074566@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH 4.19 051/338] drm/edid: check basic audio support on 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 , Jani Nikula , Greg Kroah-Hartman , intel-gfx , stable@vger.kernel.org Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" 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 @@ -4323,7 +4323,8 @@ 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");