From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1) server-digest SHA256) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id C0DCE606A32C for ; Thu, 29 Oct 2026 08:28:46 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key, unprotected) header.d=intel.com header.i=@intel.com header.a=rsa-sha256 header.s=Intel header.b=ZK1wMuIa Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 612F81120C8; Thu, 29 Oct 2026 08:28:41 +0000 (UTC) Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.11]) by gabe.freedesktop.org (Postfix) with ESMTPS id 009CB10E79B; Thu, 29 Oct 2026 08:28:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1793262517; x=1824798517; h=from:to:cc:subject:in-reply-to:references:date: message-id:mime-version; bh=TnvN80Bf0n4uB+bI5HoU0LqShnpFVKfan1khsGEPCec=; b=ZK1wMuIan5NHOy41vVhFvjiNLSWklhitH33d7hm7e+EZ6tPsPsTWWeSt RLEZXPbYmIKXXhR6qFwC4bI3X4WCw6/RymyZM6Bp5hVeJSq+sAfxLF+l4 ZjsCAVyONAEIl6yyQ/kuhVqZWDFsPZqxYeOj6aljAa8Ze+b9XdEtQ+kEE uh+VSmlB0ZKtqaNoijiVmRd5Vp3EN9lk60Iu349+1D7mEDA543zJjJKlU Cylxp9+jKjqeT4vwMRtYqfXFBIJkJHgbD4ivCZ0QQY6/mt00prJ3dO0nK IPydquZFooJl/0XjZorwUd0HiHfZqYpH3sJEY38uflJcZdbePpAPUtG5I w==; X-CSE-ConnectionGUID: luF2fcYmQJefW7JQ7yphfA== X-CSE-MsgGUID: TW/ZHjf+Q+edw5oykPHElQ== X-IronPort-AV: E=McAfee;i="6800,10657,11949"; a="1881882" X-IronPort-AV: E=Sophos;i="6.27,184,1787036400"; d="scan'208";a="1881882" Received: from orviesa004.jf.intel.com ([10.64.159.144]) by orvoesa103.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 29 Oct 2026 01:28:36 -0700 X-CSE-ConnectionGUID: ALAye2J5Rzqe0qufoBBAeQ== X-CSE-MsgGUID: Tm637KQpT3Cy8k7HwhNIcA== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.27,184,1787036400"; d="scan'208";a="5071725" Received: from ettammin-mobl3.ger.corp.intel.com (HELO localhost) ([10.245.245.74]) by smtpauth.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 29 Oct 2026 01:28:32 -0700 From: Jani Nikula To: Fangzhi Zuo , Alex Deucher , Harry Wentland , Leo Li , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter Cc: Rodrigo Siqueira , Alex Hung , Christian =?utf-8?Q?K=C3=B6nig?= , dri-devel@lists.freedesktop.org, amd-gfx@lists.freedesktop.org, Fangzhi Zuo Subject: Re: [PATCH 1/2] drm/edid: Parse HDMI 2.2 FRL rates from the SCDS In-Reply-To: <20261029004457.40545-2-jerry.zuo@amd.com> Organization: Intel Finland Oy - BIC 0357606-4 - c/o Alberga Business Park, 6 krs Bertel Jungin Aukio 5, 02600 Espoo, Finland References: <20261029004457.40545-1-jerry.zuo@amd.com> <20261029004457.40545-2-jerry.zuo@amd.com> Date: Thu, 29 Oct 2026 10:28:29 +0200 Message-ID: <36178559c2d18ea397f8d2afa8c3f4a9ffaec6fc@intel.com> X-Archived-By: MIME-Version: 1.0 Content-Type: text/plain X-BeenThere: amd-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Discussion list for AMD gfx List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "amd-gfx" X-Spam-Status: No, score=-13.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS autolearn=ham autolearn_force=no version=4.0.1 X-Spam-Checker-Version: SpamAssassin 4.0.1 (2024-03-26) on aws-us-west-2-korg-listserv-alma10-1 On Wed, 28 Oct 2026, Fangzhi Zuo wrote: > [Why] > drm_get_max_frl_rate() only decodes Max_FRL_Rate values 1-6, so a sink > advertising an HDMI 2.2 rate (7, 8 or 9) falls into the default case and > is reported as having no FRL support at all. > > [How] > Decode the HDMI 2.2 Max_FRL_Rate values 7, 8 and 9 as 16, 20 and 24 Gbps > per lane over 4 lanes. > > Signed-off-by: Fangzhi Zuo Reviewed-by: Jani Nikula > --- > drivers/gpu/drm/drm_edid.c | 12 ++++++++++++ > 1 file changed, 12 insertions(+) > > diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c > index 42f4e41c459f..48d5c4bd4812 100644 > --- a/drivers/gpu/drm/drm_edid.c > +++ b/drivers/gpu/drm/drm_edid.c > @@ -6193,6 +6193,18 @@ void drm_get_max_frl_rate(int max_frl_rate, u8 *max_lanes, u8 *max_rate_per_lane > *max_lanes = 4; > *max_rate_per_lane = 12; > break; > + case 7: > + *max_lanes = 4; > + *max_rate_per_lane = 16; > + break; > + case 8: > + *max_lanes = 4; > + *max_rate_per_lane = 20; > + break; > + case 9: > + *max_lanes = 4; > + *max_rate_per_lane = 24; > + break; > case 0: > default: > *max_lanes = 0; -- Jani Nikula, Intel